Industry Based on Entropy Weight-Cloud Model in China’s Jiangsu Province

Business School, Hohai University, Nanjing 211100, China Jincheng College, Nanjing University of Aeronautics and Astronautics, Nanjing 211156, China Jiangsu Provincial Collaborative Innovation Center of World Water Valley and Water Ecological Civilization, Nanjing, Jiangsu 211100, China Business School, Nanjing Xiaozhuang University, Nanjing, Jiangsu 211171, China Nanjing Institute of Technology, Nanjing, Jiangsu 211167, China


Introduction
With the rapid development of the economy and the acceleration of the urbanization process, automobiles have had rapidly expanded outputs, sales, and ownership in China, resulting in more resource exhaustion and environmental pollution. To reduce these disadvantages, developing a new energy automobile industry with the characteristics of energy conservation, environmental protection, and low carbon consumption is necessary, since it can help reduce greenhouse-gas emissions and improve the global ecological environment [1]. e new energy automobile industry in Jiangsu province is one of the key industries in the strategic emerging-industry development plan of the 13th five-year plan of Jiangsu. In 2017, the sales revenue of new energy vehicles and key parts and components reached 45.59 billion yuan in Jiangsu, ranking it first in China. In 2018, the production and sales of new energy vehicles increased rapidly. Total sales of new energy vehicles in Jiangsu were 164,000, a year-on-year increase of 158.2%, accounting for 13.1% of China's total sales. e installed capacity of power batteries was 14.8 GWh, a year-on-year increase of 66.3%, accounting for 24.5% of the whole country. On the basis of the above-mentioned data, the development of new energy vehicles in Jiangsu is necessary. Moreover, the new energy automobile industry has characteristics of a long industrial chain, high degree of correlation, and strong driving force, which can promote the development of upstream and downstream industries, indicating that it will become the growth point of future economy in Jiangsu [2]. However, this industry is currently facing many risk types, with regard to technology, the market, and policy. e lack of an appropriate industry risk-assessment method and failing to control risk on the basis of assessment results affects the development of the industry in Jiangsu and even the entire Chinese economy. erefore, it is necessary to evaluate the risk of the new energy vehicle industry and prevent it on the basis of assessment results, so as to promote the green and sustainable development of the industry.
is study aims to (1) construct an industry-risk-evaluation index system from endogenous and exogenous perspectives and propose a risk-assessment method that combines the entropy weight method and cloud model; (2) evaluate the new energy automobile industry risk of Jiangsu on the basis of the entropy weight-cloud model; and (3) propose a reference for risk prevention of the new energy automobile industry in Jiangsu.
e main contributions of this article are shown in two aspects. First, it analyzes the industry risk formation mechanism through both an endogenous and an exogenous perspective and then combines the expert-analysis and fuzzy-statistical methods to screen out endogenous-risk and exogenous-risk evaluation factors. On the basis of the above in-depth analysis and digging, the construction of the riskassessment index system is more reasonable. Furthermore, this study offers an effective approach for evaluating the risk of the new energy vehicle industry. e cloud model is introduced into industry risk assessment, which considers risk randomness and ambiguity, thus achieving the transformation of qualitative concepts to quantitative indicators and guaranteeing the objectivity and accuracy of the assessment results.

Research on the Risk of the New Energy Vehicle Industry.
Little investigation has reported the risk of the new energy automobile industry abroad, which was primarily focused on the perspective of strategic emerging-industry risk. Domestic research on the risks of the new energy vehicle industry has arisen in recent years. Many scholars have identified and analyzed risk factors. From the point of view of the patent, Li et al. [3] carried out an investigation about the positioning and transferring of integrated-equipmentmanufacturing (IDM) technology focus in order to predict the technology-replacement risk of a strategic emerging industry generated from the nonmainstream or competition. In the principle of the Delphi method, Christoph [4] conducted an experiment on the identification and evaluation of future supply-chain safety problems under the situation of the multiple stakeholders. Liu and Cheng [5] identified exploratory-factor and principal-component analyses by studying questionnaires and explained that technical factor was the key demand risk factor for Chinese new energy vehicles. Wang et al. [6] evaluated uncertainly influencing factors of the global supply risk of key raw materials for new energy vehicles by the Monte Carlo method. Zhang and Su [7] proposed key elements of evaluating the new energy vehicle venture-investment project, including the industrial environment, economic environment, product performance, and key technology competitiveness. Studies on categorized risks have been reported. Chen et al. [8] classified the innovation-cluster Internet risk as exogenous and endogenous risks. Wu and Liu [9] put forward the systemfragile, blind-expansion, and match-reliance risks of the new energy vehicle innovation-ecology system existing during the period of three evolution stages. Su et al. [10] divided the explosion risk of new energy vehicles, including vehiclecontrol-, auxiliary-, and power-system safety. e literature on risk assessment is currently scarce. Zhang and Sun [7] proposed a G1-ENTROPY-TOPSIS evaluation method to assess new energy vehicle venture-investment projects. On the basis of the aforementioned literature, most studies mainly focused on the identification and analysis of risk factors, as well as the empirical induction and explanation of the risk phenomena. Deeply systematic classification and quantitative analysis of various risks in the new energy automobile industry are few, which is not conducive to the development of an industry-risk management system. ere is a lack of research on risk-assessment methods for the new energy vehicle industry, which is proposed after deeper digging into industry risk on the basis of the current Chinese situation.

Risk Evaluation Methods.
Common risk-evaluation methods include the probabilistic-risk-assessment [11], scoring [12], risk-matrix [13], Petri Nets (PN) [14], TOPSIS [15], fuzzy-comprehensive-evaluation (FCEM) methods [16,17], rough-set theory [18], and hedging instruments [19]. ese methods were specifically induced in application, but they have a variety of disadvantages. e probabilisticrisk-assessment method is complicated in actual applications, and not comprehensive to risk randomness. Scoring methods do not consider the cognitive biases of different users and rarely consider risk correlations, resulting in the invalid evaluation results. e risk-matrix method is highly subjective in judging standards of risk importance, the possibility of risk occurrence, and the severity of consequences, which cannot obtain the importance level of the overall risk through mathematical operations on individual risk-importance levels. e main limitation of the PN riskassessment method is that deep knowledge of system analysis is required, but it is not simple to build the net. TOPSIS orders risk-assessment programs according to the closeness of a limited number of evaluation objects to the idealized target, while being unable to rank risks. e fuzzy evaluation matrix obtained by the FCEM is often not unique and may result in the super-fuzzy phenomenon occurring. Rough-set theory eliminates redundant data and makes simplified data information content incomplete, which reduces fault tolerance and data promotion to a certain extent. Hedging is only a risk-management technique. All the above methods have the disadvantage that it is difficult to overcome the problem of information distortion during the actual evaluation process, since risk-assessment information is transformed into specific numbers, and uncertain decisions are transformed into precise categories. is violates the ambiguity and randomness characteristics of risk. Recently, the cloud model was successfully developed. Compared to the above-mentioned methods, this model can qualitatively describe concepts on the basis of three digital features (E x , E n , H e ) of the cloud and then transform a quantitative description [20], which effectively combines fuzziness in fuzzy-set theory with randomness in probability, making qualitative concept meet quantitative indicators [21]. Unlike the above common risk-assessment methods, the cloud model allows for the membership degree to randomly fluctuate within a certain range of central values rather than a fixed number, thereby subscribing the final information as many cloud images instead of a single value. erefore, the evaluation conclusion is clearer and more intuitive and detailed, which has great guiding significance for industry risk control [22][23][24]. Moreover, this method can describe the actual situation of both each risk factor and overall industry risk. Hence, it is a more efficient and convenient method for actual applications.

Applicability of the Cloud Model.
e cloud model has been used in various fields, such as data mining [25], knowledge representation [26], evolutionary algorithms [27], intelligent control [28], network security [29], and decision making [30,31]. Additionally, it was introduced to different areas of risk assessment, such as equipmentmanufacturing-industry-chain [32], potential transformer failure [33], slope [34], and stay-cable-durability risks [35], and the cost risk of water projects. e cloud model can be applied to industry risk assessment. First, the three eigenvalues are used to reflect the membership relationship between risk factors and levels, thus effectively implementing the conversion from qualitative concepts to quantitative indicators, ensuring the objectivity of the evaluation results. Second, the cloud model blurs and magnifies boundaries of the risk-level comment set, which is drawn as a cloud map rather than a real number, clarifying evaluation results and making them more intuitive and accurate. ird, the cloud drop distribution of various risk factors is compared in the assessment assembly cloud image, which is convenient in evaluating the industry risk. erefore, in this study, the cloud model was used for the industry risk assessment of new energy vehicles in which characteristic parameters of the cloud model reflected the size of the industry risk.
is paper consists of five sections. Section 3 expounds the basic theory, including the entropy weight method and cloud model, and then proposes the risk-assessment method based on the entropy weight-cloud model. Section 4 is empirical research on evaluating industry risk. First, it analyzes the formation mechanism of industry risk from endogenous and exogenous perspectives, combining the expert-investigation and fuzzy-statistics methods, and then constructs an industry-risk-assessment index system. Second, it evaluates the new energy vehicle industry risk in Jiangsu province of China with the mode of the entropy weight-cloud. ird, it expounds the assessment process of industry risk and discusses the implication of the results. Lastly, some suggestions are given for preventing industry risk. Section 5 summarizes the research method and offers the research conclusion of this paper.

Cloud Model.
e cloud model is a mathematical model for the qualitative and quantitative transformation of uncertain knowledge. Quantitative discourse domain U is expressed by exact numeric values, and the qualitative concept on Uis marked as C. e random realization of C is x, with x ∈ C. It is set so that u(x) ∈ [0, 1] is the membership degree of quantitative value x to C, and u(x) is a random number with stabilization bias. x ∈ C has x ⟶ u(x), so the distribution of x on U is referred to as the membership cloud, or cloud for short, and is marked as C(U). ere, each (x, u(x)) is called as a cloud droplet. e numerical characters of the cloud are expressed by three numerical values, i.e., expectation (E x ), entropy (E n ), and hyper entropy (H e ). Expectation (E x ) is not only the central value of cloud droplets distributed in the space of discourse domain, but also the center of all cloud droplets. Entropy (E n ) refers to the measurement of uncertainty in qualitative concept, which reflects the fuzziness that can be received by a language value in number field and the probability of the language value that can be represented by these points. It is determined by the fuzziness and randomness of matters. Hyper entropy (H e ) reflects the dispersion degree of cloud droplets and the random variation of the membership degree. is article refers to other scholars to build a cloud model as shown in Figure 1 [36].

3.1.1.
e Forward Cloud Generator. e forward cloud generator is the course from qualitative concept to quantitative expression, which is the concrete realization for the generation of cloud droplets through the numerical characteristics of the cloud. e rule of the generator is shown in Figure 2. e algorithm of the forward cloud generator is as follows: (1) Normal random number E ni is generated with E n as the expected value and H e as variance.
(2) Normal random number x i is generated with E x as the expected value and E n as variance. (3) It is calculated through (4) e combination of (x i , y i ) forms a cloud droplet. x i refers to the quantified value of qualitative concept, and y i refers to the certainty of x i belonging to this qualitative concept.

e Backward Cloud
Generator. e backward cloud generator is the course from quantitative expression to qualitative concept, which is the concrete realization for the obtainment of numerical characteristics of the cloud through cloud droplets. Its mechanism is shown in Figure 3.
e specific algorithm is shown as follows: Input: the quantitative value of n cloud droplet(s) and the certainty of concept represented by each cloud droplet, (x, y). Output: expected value (E x ), entropy (E n ), and hyper entropy (H e ) of the qualitative concept expressed by n cloud droplet(s). (1) E x′ is taken as the estimated value of E x in (2) e points of y > 0.999 are removed, andmis cloud droplet(s) left. (3) E n′ is calculated on the basis of (4) e estimated value of E n is calculated by (5) e estimated value of H e is calculated by

Synthesized Cloud.
ere may be two or more clouds of the same type generated in the same discourse domain, and these clouds are clustered to generate a synthesized cloud.
e essence aims to synthesize several qualitative concepts into a broader concept. e features and numerical characteristics for all syntheses among clouds, i.e., the qualitative variable of n-ary, can be expressed by a synthesized cloud. erefore, a general model is provided for the synthesized cloud among several clouds under normal circumstances. Its numerical characteristics can be expressed by where E x1 and E n1 represent the expected value and the entropy of the first cloud, respectively. H e1 represents the hyper entropy of the first cloud; E xn represents the expected value of the n th cloud; E nn represents the entropy of the n th cloud; and H en represents the hyper entropy of the n th cloud.

Entropy Weight
Method. e entropy weight method is an objective weighting method that can overcome the weight difference caused by subjective factors. Entropy was first introduced by Shannon into information theory, and it was called information entropy [37]. e entropy weight method has been proven to be an effective method for determining the weight with the advantages of precision and objectivity and has also been applied to some practical problems [38][39][40][41]. e principle of the entropy weight method is shown as below. e difference between different indices is   analyzed on the basis of a great deal of information, which is named the degree of variation. First, using information entropy, the entropy weight of each index is calculated on the basis of the degree of index variation. en, each index is modified by means of entropy weight to obtain the objective and accurate index weight. According to information theory, information is a measurement representing the order degree of the system, and entropy is a measurement representing the disorder degree of system. e smaller information entropy of the indicators can provide more information and play a greater role on comprehensive evaluation, thereby receiving more attention. In this article, the weight of each risk factor in the new energy vehicle industry is determined by the amount of information that affects the risk. In the risk-evaluation index system of the new energy automobile industry constructed in this paper, the weight of each risk factor is determined by the amount of information that can affect this risk. If an index is very controversial among experts, this index has a larger amount of information and a stronger capability in risk identification. Accordingly, this index plays a greater role in comprehensive risk evaluation, so it has a larger weight. e weight of each risk factor in the index can be calculated on the basis of formulas of the entropy weight method, as shown in equations (7)- (11): Equation (7) is to standardize the experts of each risk factor, andx ij is the score of the risk factor for the i-th expert.
In equation (8), P ij is the characteristic weight between each risk factor.
In equation (9), e j is the entropy value of the risk factor, 0 ≤ e j ≤ 1; k > 0, k � 1/ln m, and delimit lim p ij ⟶ 0 p ij ln p ij � 0 In equation (10), g j is the risk difference coefficient.
In equation (11), n represents the number of risk factors, and w j is the weight of each risk factors.

Cloud Entropy Optimization
H e is generally taken as a constant, which can be adjusted according to the actual experience and uncertainty of the evaluation index. As a measure of the ambiguity of the concept of state level, the size of cloud entropy E n reflects the acceptable numerical range of the concept of state level, which affects the accuracy of the evaluation results. ere are mainly two kinds of cloud entropy calculation methods based on scholars' understanding of different angles of classification [42].

Cloud Entropy Computing Method Based on "3E n "
Rule. e "3E n " rule refers to the fact that the elements of cloud droplets located outside the interval [E x − 3E n , E x + 3E n ] are low-probability events. According to the rule, adjacent hierarchical extension clouds with clear boundaries are obtained, as shown in

Cloud Entropy Computing Method Based on "50%
Relevance" Rule. e rule of "50% relevance" refers to the correlation degree of cloud droplets located at the level boundary being equal to that of adjacent levels; both are 50%. By using the rule, an extension cloud with a blurred boundary at adjacent levels is obtained, which indicates that the critical value belongs to both the upper and lower levels. e calculation formula is as shown in

Cloud Entropy Optimization Algorithms.
ese two methods determined the entropy value of the graded normal cloud model from different angles, which may lead to conflicting state determination conclusions [21,43]. erefore, a cloud entropy optimization algorithm is used to solve the entropy problem in this study, which guarantees the clarity of the classification and takes into account the principle of fuzziness.
Assuming that the actual measurement data of an evaluation index are represented by x i and its state level is m, the corresponding m-group hierarchical cloud model is n ″ ) 1×m are the cloud entropy sets calculated by the above two algorithms, (E (j) n ) 1×m is the optimal cloud entropy set obtained by combinatorial optimization, and j(j � 1, 2, . . . , m) represents the rank number.
From the cloud correlation degree, function u(x) can be regarded as a monotonically increasing function with E n′ as its independent variable, so for E n ″ , the minimum correlation degree of corresponding grade j is the value of u(x) ′ (j) under the "3E n " rule algorithm, expressed as min , and the maximum correlation degree of Mathematical Problems in Engineering 5 corresponding grade j is the value of u(x) ″ (j) under the "50% relevance" rule algorithm, expressed in u(x) ″(j) max . Let the cloud entropy optimization algorithm get the correlation degree of grade j asu(x) (j) , and use Δu(x) (j) max to express the maximum deviation of grade j correlation degree. e constructed function is shown in en, according to the principle of minimizing the maximum deviation, the sum of the maximum correlation deviations of the indicator observations x i for the standard hierarchical cloud model of group m should be minimized. erefore, a nonlinear decision-making model of Δu(x) (j) max can be constructed, which is shown in Based on the above model, the optimal cloud entropy set E n � (E (j) n 1 × m) of the industry risk is obtained.

Risk-Assessment Method Based on Entropy Weight-Cloud
Model. In order to make the results of the new energy vehicle industry risk assessment more objective and accurate, the entropy weight method and the cloud model were combined to evaluate and quantify the industry risk. e entropy weight method was used to determine the weight of each risk-evaluation index system, and the one-dimensional normal cloud model and synthesized cloud generator are used to evaluate industry risk. Figure 4 shows a detailed evaluation process consisting of three stages.
Stage 1: construct of the industry risk assessment index system. is paper analyzes industry-risk-formation mechanism from both an endogenous and an exogenous perspective and then combines the expert analysis method and fuzzy statistical method to screen out the endogenous and exogenous risk evaluation factors. On the basis of the above in-depth analysis and digging, the industry-risk-assessment index system is constructed. Stage 2: determine the weight of each risk index on the basis of the entropy weight method. It investigates the importance of each risk factor through the expert-survey method and determines the weight of each indicator on the basis of the entropy weight method. In this stage, the first step is to classify the industry risk level. Next, it constructs the membership function of the cloud model and uses the three eigenvalues of the cloud model to reflect the membership relationship between the risk factors and the risk levels.
en the forward cloud generator is used to perform a series of calculations on the cloud model to obtain the cloud drop distribution of each of the secondary risk factors. Combined with the weight of each risk factor, the study uses the integrated cloud generator to calculate the characteristic values of the main risk factors and comprehensive industry risk obtaining the cloud drop distribution of each risk. Finally, based on the evaluation results, industry risk method measures are proposed.

Analysis of Industry-Risk-Formation Mechanism (1) Analysis of the Formation Mechanism of Endogenous Risk.
e new energy automobile industry is compared to the human body in this study. e innate quality of the body is like the foundation of industrial development; if innate quality is good, the ability of the industry to withstand risk is strong. e proportion of human-body function elements is like the industrial structure; if production factors are with reasonable composition and good coordination, the ability of the industry to withstand risk is strong. e network can be understood as the interactive relationship of industry production components. e more coordinated the various entities are, the stronger the industry's ability to resist risks. erefore, endogenous risk was divided into fundamental, structural, and network risk [44].
(1) Fundamental Risk. e industrial foundation is the basic status of industrial development. e development of an industry is directly related to the industrial foundation of a country or region. Fundamental risk is caused by different basic conditions of the production factors during the new energy automobile industry. According to the theory of production factors, if the industry has good innate factors of production, the industry's ability to resist risks is strong; otherwise, the ability is weak. e industrial foundation is closely related to innate factors and practical capabilities of industrial development. Innate factors are factors directly related to innate endowments and reflect the industry's possible innate qualities and growth potential. ey include resource endowment, research and development technology level and reserves, the strength of obtained financial support, the quality of labor force, and the management level of enterprises. If the innate factors of the industry are weak, the possibility of the industry forming fundamental risks is greater. e real ability is influenced by innate factors, and it is a series of capabilities shown in the industrialdevelopment process, such as technological-innovation, financing, marketing, and production capabilities. ese capabilities are directly related to the development status of the new energy automobile industry. If real industrial capacity is weak, the possibility of industry risk is also greater. Real ability is affected by the innate factors of the industry, and it has a more direct relationship with its own development. If the innate endowment of the new energy vehicle industry is insufficient, support for the industry's actual capabilities may be insufficient, so it is easy to form fundamental risk. However, even if the industry's innate factors are similar, if the industry's own actual development status is different, it also leads to differences in real capabilities, then forming fundamental risk. e mechanism of fundamental risk is shown in Figure 5.
(2) Structural Risk. is risk may be caused by structural factors such as the composition of different scales of enterprises, the composition of raw materials, the composition of the industrial chain, and regional distribution in the industry when the industry is statically observed. If state-owned enterprises in the region are too strong, this easily leads to a monopoly, which affects the enthusiasm of private enterprises for innovation. If the region lacks core enterprises, the market concentration is low; this may lead to excessive resources and weak industrial competitiveness. e battery is the core of new energy vehicles. At present, raw materials for producing batteries are mainly lithium, cobalt, and manganese. As the number of new energy vehicles increases, the competition for global metal resources becomes more intense. However, the main power-battery resources such as lithium metal and cobalt in Jiangsu are lacking. erefore, the stable supply of new energy vehicle resources and price stability are facing greater challenges. In view of the limited types of raw materials for the production of batteries, the entire new energy automobile industry chain is constructed on the basis of these metal resources. e product variety is single. Once metal resources cannot be supplied in time, the entire industrial chain faces the risk of being replaced. e new energy automobile industry should be rationally distributed according to factors such as regional industrial-development basis, market-distribution characteristics, and trade facilitation. For example, if the government develops the new energy automobile industry too blindly, it may lead to industrial homogenization and fragmentation. e formation mechanism of structural risk is shown in Figure 6.

Mathematical Problems in Engineering
(3) Network Risk. According to economic and socialnetwork theory, the new energy automobile industry can be regarded as a network composed of subjects, resources, and behaviors. Network risk occurs in the early stage of the development of the new energy automobile industry. During interactions between subject and resource, due to a lack of capital, technology, information, talents, and material resources, there are some harmful behaviors appearing in the industry, such as unfair competition, excessive dependence on policies, incomplete contracts, and moral hazards. ese behaviors affect the development of the industry.
As shown in Table 1, the main body of the new energy automobile industry mainly includes consumers, vehicle manufacturers, supporting manufacturers, scientific research institutions, governments, and operation and maintenance companies. Resources include basic information and policy resources. Behaviors occur between subjects such as behavioral trading, competition, cooperation, regulation, and research and development. Interactions between subjects form various relationships, such as competition, cooperation, information, and competition and cooperation.
In the process of interaction between subject and resources, relevant subjects play a game with each other, and there are some behaviors that adversely affect the industry, such as unfair competition, excessive dependence on policies, and incomplete fulfillment of contracts and moral hazards. ese actions form network risks of the industry. e formation mechanism of structural risk is depicted in Figure 7.
(2) Analysis of the Formation Mechanism of Exogenous Risk. Exogenous risk comes from outside the industry. It originates from the complexity and uncertainty of the environment in which the new energy automobile industry exists, such as the regional ecological environment, economic cycles, external competition, and policy or legal risks. Exogenous risk has the characteristics of wide range, contingency, and suddenness. Compared with endogenous risks, exogenous risk is more difficult to control. e external factors of the industry itself cannot create risks, but changes in external factors change the industry's relatively stable internal environment, thus impacting the industry and leading to risk. e perfect policy system is conducive to the development of the new energy automobile industry, or it would bring great risk to the industry. e development of the new energy automobile industry has a relatively significant government-driven situation, which probably cause excessive government intervention in the market and affect the effective allocation of resources. erefore, the new energy auto industry faces policy risk. Environmental change itself does not create risk. Environmental factors act on the industry, and exerting influence on the industry can lead to risk. For example, low-economic, imperfect-legal, fragilezonal-ecological, and poor recycling, destruction and storage environments of power batteries affect the development of new energy vehicles, thus making the industry face greater environmental risk. e market factor is also important, affecting the development of new energy vehicles. e development of new energy vehicles not only faces the competitive pressure of traditional-fuel vehicles, but also faces the competitive pressure of foreign new energy vehicles. At present, compared with traditional-fuel vehicles, Jiangsu's new energy vehicles have no obvious competitive advantage, and there is still a big gap with internationally advanced new energy vehicles. Moreover, society perceptions of new energy    Figure 6: Analysis of the formation mechanism of structural risk. ere is a mutually reinforcing mechanism between endogenous and exogenous risks (Figure 8). If the endogenous risk is large, the industry's ability to resist risk is also weak, which leads to great impact on exogenous risk. Once the exogenous risk is formed, the relative steady state of endogenous factors is broken, which increases the possibility of endogenous risk.

Pathways of Identifying the Risk Factors.
Combining the above analysis of the industrial formation mechanism, three pathways were used to identify the risk factors of new energy automobile industry: (1) reading the domestic and foreign literature related to the new energy automobile industry; (2) conducting consultations, exchanges, and interviews with stakeholders involved in new energy automobile industry to obtain relevant risk factors; and (3) comparing the situation of other industry risk types and taking them as reference to determine risk factors. After modification for several times in this paper, the risk of the new energy automobile industry was divided into endogenous and exogenous risks on the basis of endogenous and exogenous perspectives. Endogenous risk refers to the risk faced by the industry itself, and exogenous risk refers to risk from the external environment. Endogenous risk is the industry risk caused by internal causes and can reflect the industrial quality. Exogenous risk originates from the complexity and uncertainty of the environment in which the new energy automobile industry exists.

Constructing Risk-Assessment Index System.
rough reading the domestic and foreign literature related to the new energy automobile industry, this paper analyzed the risk-formation mechanism from endogenous and exogenous perspectives and then constructed the primary indicators. Endogenous risk was divided into fundamental, structural, and network risks. Exogenous risk was subdivided into policy, market, and environmental risks. en, layer by layer, a hierarchical structure including six primary indicators and twenty secondary indicators was formed. Among second level indicators, fuel-source, unfair-competition, incomplete-contract, moral, excessive-policy-dependence, social-cognitive, and overcapacity risks were identified through exchanging and interviewing stakeholders involved in the new energy automobile industry; regional-distribution, industrial-chain, international-competition, industry-transformation, and zonal-ecological risks were identified through comparing the situation of other industry risk types [45][46][47][48] and taking them as reference to determine risk factors. Other secondary indicators were identified from reading the domestic and foreign literature related to the new energy automobile industry [49,50]. e risk-evaluation index system is shown in Table 2. e definition and interpretation of primary indicators were introduced in the analysis of the industrial-risk formation mechanism. e definition and interpretation of secondary risk-assessment indicators are explained as follows.
(1) Fundamental Risk. Fundamental risk mainly includes technological-innovation, financing-ability, production-efficiency, and production-cost risks. e possibility that the lack of technological innovation capability, high cost of the product, low production efficiency, and financing difficulties affect industrial development forms the four risks above, respectively.
(2) Structural Risk. Structural risk mainly includes market-concentration, fuel-source, regional-distribution, and industrial-chain risks. e lack of core enterprises in the industry, resulting in excessively dispersed resources and low market concentration, which brings risk to the development of the industry, forms the market-concentration risk. Fuel-source risk is the risk that the industry is limited to a certain resource due to restrictions of fuel supply. Industrialchain risk is the risk caused by the unreasonable structure of the new energy automobile industry chain. Regional-distribution risk is the possibility that unreasonable regional distribution adversely affects the development of the industry. (3) Network Risk. Network risk mainly includes unfaircompetition, incomplete-contract, moral-hazard, and excessive-policy-dependence risk. Risk caused by unfair competition and incomplete contracts among various stakeholders are called unfair-competition and incomplete-contract risks, respectively. Due to information asymmetry, subjects with competing relationships, such as research institutions, maximize their own utility while engaging in behaviors that are not conducive to the actions of others. is possibility of having impact on the industry is a moral risk. e risk of excessive dependence on policies refers to the possibility that the new energy automobile industry is overreliant on government support policies, thereby affecting the development of the industry. (4) Policy Risk. Policy risk mainly includes policy-stability, -continuity, -timeliness, and -coordination risks. Unstable, discontinuous, untimely, and uncoordinated policies on the industry form the four secondary riskevaluation indicators above, respectively.

Classification of Risk Levels.
Risk is an uncertain description of future results. Most scholars use qualitative language to define risk level. It is generally sorted into "low," "lower medium," "medium," "higher medium", and "high" risk. e description of risk level is the lack of objectivity of quantitative data. Some of the literature uses weights for risk measurements. Even though this method can quantify risk, once weights are determined, the risk loses randomness and ambiguity [51]. e cloud model was applied to classify and evaluate risk in this study, which achieved the conversion of  a qualitative concept into quantitative concept and reduced loses of information during the period of conversion. Moreover, numbers in the range from 0 to 5 were used to measure risk. A small value indicated low risk, and vice versa. In order to calculate the expectation, entropy, and super entropy of each level of risk, ten experts in the new energy industry were invited to assign values for low, lower medium, medium, higher medium, and high risk in July 2019 (as shown in Table 3). is study used the forward cloud generator in the cloud model to generate a risk-level cloud map (Figure 9). e horizontal axis represents the domain of evaluation scores, and the vertical axis represents the membership degree. Each cloud droplet has its corresponding eigenvalues(E x , E n , H e ). ese green, blue, yellow, red, and purple cloud droplets represent the distribution of the graded normal cloud model of low-high risk, respectively.

Determination of Indicator Weight.
e influence degrees of each first and second level index on the risk of the new energy automobile industry were different, so it was necessary to determine the degree of influence of each risk factor. e risk-factor weight of the new energy automobile industry in China's Jiangsu province is shown in Table 4. In addition, the weight of endogenous and exogenous risks was 0.4111 and 0.5889, respectively, based on the entropy weight method shown in Table 4. Obviously, the impact of exogenous risk on the new energy vehicle industry was greater than that of endogenous risk.

Industry Risk Assessment Based on the Cloud Model.
Ten experts in the field of new energy automobile industry in Jiangsu were invited to score each risk and analyze the scores in July 2019. Take fundamental risk, for example, which includes technological-innovation, production-cost, production-efficiency, and financing-capacity risks. e expectation (E x ) and entropy (E n ) of each risk factor were calculated in this study.
where E x is the expectation of a risk factor. E x1 , E x2 , . . . , E xn are the expected values calculated based on the expert scores for every risk factor according to (12) and n represents the number of experts. Entropy value solution based on the cloud entropy optimization algorithm: where H e is the hyper entropy of a risk factor, which reflects the randomness and ambiguity of the evaluation, and k is a constant, of which the value is adjusted according to the fuzzy threshold of risk concentration factors. If the hyper entropy result is too large, the uncertainty of the evaluation is increased; therefore, it was assigned a value of 0.1 in this article. is can not only objectively reflect the randomness and ambiguity of risk assessment, but also simplify the evaluation process. Calculation results of the three eigenvalues included in the subrisk factor are shown in Table 5.
Four subrisk factors all affect the main factor risk, that is, fundamental risk; a one-dimensional integrated cloud could be used to represent it. Using equation (17), (18), and the cloud entropy optimization algorithm, this study calculated three eigenvalues of fundamental risk. Using the same principle, three eigenvalues of five other main factor risks, namely, structural, network, policy, market, and environmental risks, were calculated as shown in Table 6.
In (19), expectations for a risk: E n1 , E n2 , . . . , E nn represent the n-th expert score for the risk. E n1 , E n2 , . . . , E nn are the entropy of a risk factor. In (20), W 1 , W 2 , . . . , W n represents the weight of a risk.
We can calculate the expectation, entropy, and hyper entropy of the comprehensive risk using (19) and (20), the expectation (E x ) was equal to 2.8849, and entropy (E n ) was equal to 0.9500. Expectation (E x ) affects the position of the center of gravity of the cloud drop, indicating the average value of the risk-factor membership; entropy (E n ) describes the ambiguity and randomness of the cloud drop, reflecting the possible range of risk-factor weights and membership degrees; hyper entropy is the entropy of entropy, which describes the thickness of the cloud and reflects the degree of dispersion of the cloud droplets, indicating the proportion of the various risk factors and the deviation of the membership from the average. From the three eigenvalues of each risk, the cloud model map of the main factors and the comprehensive risk comparison cloud model map could be obtained by using MATLAB software, as shown in Figures 10-12. Figure 10 shows the cloud map of endogenous risk, Figure 11 shows the cloud map of exogenous risk, and Figure 12 shows the cloud map of new energy automobile industry risk in Jiangsu. In the radar chart shown in Figure 13, red lines represent the weight of six primary risk factors indicators; that is, the importance of primary risk factors is represented by red lines, and the importance of dotted lines increases from inside to outside. Blue lines represent the risk level of the six primary-risk-factor indicators, and the grade is higher as you move from inside to outside. Figure 10 shows that the expectations of fundamental, structural, and network risks were 3.2028, 2.6287, and 2.7321, respectively. e cloud map of fundamental risk was basically consistent with the higher medium risk; therefore, fundamental risk was a higher medium risk. e cloud maps of structural and network risks were between medium and higher medium risk, and structural and network risks were moderately high medium      components still need to be purchased, the fuel-cell-vehicle industry chain lags behind, and a gap exists between Jiangsu province's product quality and that of advanced regions abroad. In addition, high product cost, low production efficiency, and financial constraints result in the industry facing high production-cost, production-efficiency, and financing risks. On the basis of the above analysis, fundamental risk is a higher medium risk. Structural risk is at medium level and close to higher medium risk. First, although the core competitiveness of the new energy vehicle industry in Jiangsu has broken through, it is still not strong.    Next, industry enterprises are widely distributed but not refined. Last but not least, resulting industry chains were created but are not perfect. On the basis of the above analysis, the main influencing factors of network risk were moral risk and the risk of overreliance on policies. Analysis showed that new energy vehicle companies in China's Jiangsu province overrely on policy support; therefore, the future market position is threatened by the other new energy vehicle companies outside the Jiangsu province. Additionally, unfair-competition, incomplete-contract, and moral risks are higher than the medium risk level, so the risk level of the whole network is higher than medium risk. Figure 11, expectations of policy, market, and environmental risks were 2.9822, 3.0084, and 2.8065, respectively. e cloud maps of policy and market risks were basically consistent with the higher-medium-risk cloud map. erefore, policy and market risks were higher than medium risk, and the environmental-risk cloud map was located between the mediumand higher-medium-risk cloud map, which was very close to the higher-medium-risk cloud map, so environmental risk was moderately medium risk. Moreover, the order of external generating risks was market > policy > environmental risk. Because the development of the new energy vehicle industry is at an early stage in Jiangsu province, various stakeholders, especially consumers, cannot fully recognize and accept this type of automobile; therefore, the industry faces high social-cognitive and industry-transformation risks. In addition, owing to the limited mileage, the battery technology has not achieved a fundamental breakthrough, a small number of charging piles, so the industry is facing a greater risk of international competitiveness. Moreover, the discontinuity and timeliness of policy formulation and the inconsistency between various policies lead to higher industry-policy risk in Jiangsu. Although the environmental risk is the lowest among exogenous risks, it has the greatest impact. is is because the environment is of great significance to the development of the company. e power batteries used in new energy vehicles are now mainly lithium-ion batteries. If discarded batteries are not properly recycled, destroyed, and stored, there is greater environmental pollution. However, the current battery-recycling system is imperfect in Jiangsu. Moreover, the technology of battery recycling is insufficient. erefore, although Jiangsu has become the national pilot area for the recycling of new energy vehicle power batteries in China, the risk still exists.

Exogenous Risk Analysis. As depicted in
e regional ecological environment is also an important factor for industrial development, but it is fragile in Jiangsu province. Simultaneously, the imperfect legal system and economic fluctuations in Jiangsu are also the important factors that lead to high industrial environmental risk.

Industry Comprehensive Risk Analysis.
e risk expectation of the new energy automobile industry in Jiangsu was 2.8849. e industry comprehensive risk cloud map is located between the medium-and higher-medium-risk cloud maps. erefore, the industry's comprehensive risk level is higher than medium risk, which is close to a higher medium risk. Moreover, the impact of exogenous risk on the new energy vehicle industry risk is greater than that of endogenous risk, as shown in Table 4.

Suggestions
4.6.1. Improvement of the Industry's Own Ability to Resist Risk. As can be seen from Figure 13, the development of the new energy automobile industry in Jiangsu faces a series of high endogenous risks, such as technological-innovation, production-cost, and financing risks. erefore, industry enterprises should improve their ability to resist risk [52]. First, accelerating technical innovation and strengthening the core competitiveness of enterprises are necessary. e core competitiveness of the new energy automobile industry lies in its innovative technology and excellent product quality. However, the development of battery technology in the new energy automobile industry of Jiangsu has run into a bottleneck, and the industry faces higher technical risk. erefore, in order to provide a good environmental foundation for technological innovation, the industrial science and technology innovation system and platform should be perfected [53]. Furthermore, cooperation in technology research and development between international and domestic enterprises should be strengthened to improve the efficiency of industrial research and development. Second, we should take some measures to expand financing channels. e new energy automobile industry is capitalintensive. Compared with other industrial enterprises, it has the characteristics of high production costs, high unit value, and high fixed cost investment. Hence, the development of the industry must be supported by strong capital. It is necessary to improve the new energy vehicle financial-service system to meet the financing needs of new energy vehicles such as production, operation, and consumption. Vigorously expanding financing channels requires the government to have a certain policy tendency towards industrial funds, which means increasing investment in research and development, and innovation. Moreover, it is necessary to guide social capital to participate in new energy vehicle production and operation services and especially encourage nonbank financial institutions to increase their efforts to support the financing of the new energy vehicle industry [54]. Lastly, the construction of industrial standardization needs to be sped up. Industrial standardization, as a crucial technical support for the development of new energy automobile industry, plays an important role in risk aversion. e construction of industrial standardization in the new energy automobile industry needs to be coordinated and managed by special government agencies to establish sound industrial standards and enhance the maneuverability and practicability of these standards. e establishment of standards that restrict the further development of industry must be optimized as soon as possible, including battery size, charging voltage, communication protocol, and the design of charging stations, so as to provide the support in technical standards and regulations for large-scale demonstration and industrialization.

Reduction of the Policy Risk in New Energy Vehicle
Industry. Although policy risk is not the highest, its impact on the entire industry risk is very important (Figure 13). It is necessary to reduce policy risk. e new energy automobile enterprises of Jiangsu are overly dependent on policy support. In order to enhance the core capabilities of the industry, the role of market mechanism must be prominent [55]. First, it is important to clarify market-oriented and policy-guided development ideas. New energy vehicle industry policy in Jiangsu is strongly dominated, and industrial enterprises are more dependent on policy. Policy discontinuity, delay, and instability have a great impact on industrial enterprises. erefore, clarifying development ideas is extremely important to reduce new energy vehicle industry policy risk in Jiangsu. Second, it is necessary to fully implement market-oriented and policy-guided development ideas. Policy should start from the cultivation of a favorable development environment for new energy automobiles and gradually establish a dominant position in the market. Guidance policy is formulated to synthesize production, learning, scientific research, practices and applications, and other social forces to build an environment for the development of the new energy automobile industry with Chinese characteristics and thus promote the rapid and healthy development of a new domestic electric-vehicle industry.
Lastly, an evaluation mechanism should be established to evaluate policy-implementation effects. e implementation of policy should be evaluated regularly, and effectiveness evaluation and adjustment research should be carried out after the implementation of policy so as to continually optimize relevant measures.

Building Industry's Soft Environment.
According to weight calculation, although environmental risk is higher than medium risk, impact on overall industry risk is the greatest. Hence, environmental risk must be reduced in order to reduce industrial risk. First, we build the industrial cultural environment. In order to make consumers feel the effect of low-carbon transportation on the environment, it is necessary to guide the whole society, and especially consumers, to establish values and consumption views that are compatible with low-carbon consumption. We should encourage low-carbon consumption and guide automotive consumers to pursue green and healthy orientation. e media, public opinion, and other ways to improve awareness and acceptance of new energy vehicles in the whole society should be utilized. Second, the legal environment should be improved, on one hand, incorporating new energy vehicle industry policies into the content of relevant laws to indirectly guide and control corporate behavior. On the other hand, legal means should be used to ensure that new energy vehicle policies can be effectively implemented.
ird, power-battery storage and recycling environments need to be improved. First, it is necessary to promote automobile manufacturers to accelerate the establishment of recycling channels for used power batteries and then ensure that the responsibility extension system of producers is fully implemented. Second, traceability management could be used to accelerate the integration of the industrial chain. In order to carry out full life-cycle traceability management, we should have a unified code of power-storage batteries. ird, we should cultivate benchmarking enterprises for powerbattery recycling and explore the formation of a diversified recycling model with strong technical economy and resource-friendly environment. Lastly, ethical cultural-restraint and risk-management mechanisms to avoid ecological risk should be established in order to reduce regional ecological risk.

Improvement of the Risk-Sharing Mechanism.
On the basis of the above analysis, the market risk of the new energy automobile industry in Jiangsu is at the higher-medium-risk level, so it is necessary to establish and improve the risktaking mechanism to guarantee the mutual benefit and win-win result of stakeholders involved in the new energy automobile industry to reduce market risk. First, establish and optimize a reasonable risk-taking mechanism. Building a reasonable benefit-and risk-sharing mechanism is necessary, since different stakeholders involved in new energy automobile industry have different risks. Second, the business model of new energy automobile industry should be innovated. From the perspective of the whole industry chain, the value chain should be reorganized to understand the course of value creation and the situation of input and output in all links and subjects. en, a reasonable interest distribution mechanism and an open and sustainable operation mechanism for infrastructures should be formed. Additionally, increasing the level of consumer recognition is also the measure to reduce market risk. On the basis of the above research analysis, the risk of consumer cognition is higher than medium. Most buyers of new energy automobiles have concerns about the comfort, safety, charging procedures, and supporting the infrastructure of new energy electric automobiles. Hence, it is necessary to strengthen publicity efforts, carry out more offline experiencing programs, and guide consumers to experience and accept new energy automobiles.

Conclusion
With a large amount of greenhouse-gas emissions, global warming, and the deterioration of the global ecological environment, it is necessary to develop the new energy vehicle industry. However, the new energy vehicle industry is facing high risk.
ere is currently no comprehensive assessment method to quantitatively evaluate industry risk.
erefore, an evaluation model that can effectively evaluate the industrial risk situation was established in this article. e cloud model was applied to the risk assessment of the new energy automobile industry, and characteristic parameters were used to reflect the size of the industry risk. Compared with traditional risk-assessment methods, such as probabilistic risk assessment, score, risk matrix, Petri Nets, Mathematical Problems in Engineering TOPSIS, fuzzy comprehensive evaluation, and rough-set theory, the cloud model can better reflect the ambiguity and randomness of each risk factor, guaranteeing the objectivity and accuracy of the assessment results.
is article first analyzed the industry risk-formation mechanism from endogenous and exogenous perspectives. Combining expert analysis with fuzzy statistical methods, the endogenous-and exogenous-risk-evaluation factors were screened out to construct an industry risk-evaluation system. en, it applied the entropy weight-cloud model to evaluate the industry risk. e entropy weight method was used to determine the weight of each risk-evaluation index system, and the one-dimensional normal cloud model was used to evaluate industry risk. e forward cloud generator was used to repeatedly calculate the result of the cloud model, and the cloud drop distribution map of each level of risk factor was depicted. e risk level was upgraded from qualitative to quantitative, which provided a more accurate and intuitive basis for industry risk assessment. In the calculation process, this paper drew a cloud map of each risk impact factor and put it into the risk level cloud map for evaluation and analysis, more intuitively and visually analyzing the risk level to make results more convincing. Lastly, the risk of the new energy vehicle industry in Jiangsu in July 2019 was evaluated. On the basis of the empirical-analysis results, the industry-risk level of the new energy automobile industry was higher than medium and close to a higher medium. e impact of exogenous risk on the new energy vehicle industry was greater than that of endogenous risk. A series of suggestions, such as improving the industry's own ability, building the industry's own soft environment, reducing policy risk, and the improvement of the risk-sharing mechanism, were given for preventing industry risk.
is paper used the one-dimensional normal cloud model to evaluate industry risk, which can better reflect the ambiguity and randomness of each risk factor, guaranteeing the objectivity and accuracy of the assessment results. However, the rule generator of the one-dimensional normal cloud model can only represent the situation of single-input and single-output data. Industry risk has multidimensional attributes, and there is a coupling relationship between multidimensional attributes. erefore, the multidimensional cloud model urgently needs to be discussed and researched.

Data Availability
e data used to support the findings of this study are available from the corresponding author upon request.

Conflicts of Interest
e authors declare no conflicts of interest.