Omega-international Journal of Management Science最新文献_第7页

Preference disaggregation analysis with criteria selection in a regularization framework 正则化框架下标准选择的偏好分解分析

IF 6.7 2区管理学

Omega-international Journal of Management Science Pub Date : 2024-12-07 DOI: 10.1016/j.omega.2024.103252

Kun Zhou , Zaiwu Gong , Guo Wei , Roman Słowiński

{"title":"Preference disaggregation analysis with criteria selection in a regularization framework","authors":"Kun Zhou , Zaiwu Gong , Guo Wei , Roman Słowiński","doi":"10.1016/j.omega.2024.103252","DOIUrl":"10.1016/j.omega.2024.103252","url":null,"abstract":"<div><div>Limited by cognitive abilities, decision-makers (DMs) may struggle to evaluate decision alternatives based on all criteria in multiple criteria decision-making problems. This paper proposes an embedded criteria selection method derived from preference disaggregation technique and regularization theory. The method aims to infer the criteria and value functions used by the DM to evaluate decision alternatives. It measures the quality of criteria subsets by investigating both the empirical error (fitting ability of value functions to preference information) and generalization error (complexity of value functions). Unlike existing approaches that consider only the deviation from linearity as a measure of complexity, we argue that the number of marginal value functions also affects complexity. To address this, we use 0–1 variables to indicate whether a criterion is selected in the value function or not, and construct a criteria selection model with the trade-off between empirical and generalization errors as the objective function. If the criteria are sufficiently discriminative, we identify all supporting criteria sets that can restore preference information without unnecessary criteria. We further analyze the likelihood of criteria being selected by the DM. Finally, the effectiveness of the proposed method is demonstrated by applying it to an example of the green supplier selection problem.</div></div>","PeriodicalId":19529,"journal":{"name":"Omega-international Journal of Management Science","volume":"133 ","pages":"Article 103252"},"PeriodicalIF":6.7,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dual sourcing hurts supply chain viability? The value of brand-owners’ cooperation under single sourcing 双重采购损害了供应链的生存能力？单一采购下品牌商合作的价值

IF 6.7 2区管理学

Omega-international Journal of Management Science Pub Date : 2024-12-05 DOI: 10.1016/j.omega.2024.103250

Baozhuang Niu , Xinhai Deng , Fengfeng Xie , Zifan Shen

{"title":"Dual sourcing hurts supply chain viability? The value of brand-owners’ cooperation under single sourcing","authors":"Baozhuang Niu , Xinhai Deng , Fengfeng Xie , Zifan Shen","doi":"10.1016/j.omega.2024.103250","DOIUrl":"10.1016/j.omega.2024.103250","url":null,"abstract":"<div><div>In the post-pandemic era, maintaining supply chain viability under long-term crises has received increasing attention. Conventional wisdom suggests that diversifying the supply can effectively enhance the viability performance. However, recent business practices, such as Volkswagen's cooperation with XPENG, challenge this intuition by reducing supply diversification. This study therefore examines the cons and pros of two competing brand-owners’ cooperation for the improvement of supply chain viability. We utilize two commonly used indexes, namely, the Risk Loss Index and the Fulfillment Rate Index, to assess the impact of brand-owners’ cooperation. We explore three scenarios: (1) Scenario N, where each brand-owner chooses the non-cooperation strategy and hence, procures from their exclusive supplier; (2) Scenario Y, where both brand-owners choose the cooperation strategy and procure a common component from the same supplier; and (3) Scenario H, where brand-owners choose dual sourcing strategy and procure crosswise from two upstream suppliers. It seems that Scenario H enables stable supply and hedges the supply risk by dual-sourcing. Interestingly, our findings indicate that Scenario Y where brand-owners cooperate on sourcing from a common supplier can be the most effective, while dual sourcing in Scenario H may not always lead to better performance of supply chain viability.</div></div>","PeriodicalId":19529,"journal":{"name":"Omega-international Journal of Management Science","volume":"133 ","pages":"Article 103250"},"PeriodicalIF":6.7,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Managing resilience and viability of supranational supply chains under epidemic control scenarios 在疫情控制情景下管理超国家供应链的复原力和可行性

IF 6.7 2区管理学

Omega-international Journal of Management Science Pub Date : 2024-12-03 DOI: 10.1016/j.omega.2024.103234

Jan B. Broekaert , Faizal Hafiz , Raja Jayaraman , Davide La Torre

{"title":"Managing resilience and viability of supranational supply chains under epidemic control scenarios","authors":"Jan B. Broekaert , Faizal Hafiz , Raja Jayaraman , Davide La Torre","doi":"10.1016/j.omega.2024.103234","DOIUrl":"10.1016/j.omega.2024.103234","url":null,"abstract":"<div><div>A comprehensive model is presented to evaluate the <em>resilience</em> and <em>viability</em> of supranational supply chains under various epidemic control scenarios. The model integrates a multiplex network of socially connected individuals subjected to a probabilistic SEIRSD epidemic, as well as production configurations monitored for performance capacity. The epidemic evolution within this system depends on four primary cost factors: deployed control strategy, health policy implementation, the value of human life, and economic productivity loss due to the epidemic. These costs are adjusted for GDP differences between countries in the network and are influenced by factors such as the duration and severity of confinement, vaccination efficacy, and healthcare capacity. A Nash equilibrium analysis of SEIRSD load-based costs is employed to identify optimal control strategies. Time To Recovery (TTR) and Longitudinal Service Level (LSL) are used as metrics for assessing the resilience and viability of supply chains. The convergences and conflicts of control strategies are evaluated using TTR and LSL, providing insights into the impact of public health measures on supply chain performance. This methodology offers a framework for policymakers and supply chain managers to make informed decisions during prolonged epidemic conditions. Numerical simulations illustrate the conditions for convergence and conflict between epidemic control policies and supply chain objectives, highlighting the need for dynamic policy adjustments to ensure supply chain resilience and viability.</div></div>","PeriodicalId":19529,"journal":{"name":"Omega-international Journal of Management Science","volume":"133 ","pages":"Article 103234"},"PeriodicalIF":6.7,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Courier assignment in meal delivery via integer programming: A case study in Rome 通过整数规划的送餐快递员分配：罗马的案例研究

IF 6.7 2区管理学

Omega-international Journal of Management Science Pub Date : 2024-12-02 DOI: 10.1016/j.omega.2024.103237

Matteo Cosmi , Gianpaolo Oriolo , Veronica Piccialli , Paolo Ventura

{"title":"Courier assignment in meal delivery via integer programming: A case study in Rome","authors":"Matteo Cosmi , Gianpaolo Oriolo , Veronica Piccialli , Paolo Ventura","doi":"10.1016/j.omega.2024.103237","DOIUrl":"10.1016/j.omega.2024.103237","url":null,"abstract":"<div><div>We present an optimization model for assigning orders to couriers developed for an Italian meal delivery firm focusing on Rome. The firm focuses on top-end restaurants and customers and pursues high Quality of Service through careful management of delays. Our model reflects that in the firm’s business, the majority of orders are placed in advance. This took us to design a sequential decision process implementing a rolling horizon approach where we do not try to anticipate future demands. We, therefore, iterate the solution of a fully deterministic optimization problem, the <em>Offline Couriers Assignment Problem</em> (<span>ocap</span>), where we assume full knowledge of the orders and aim at minimizing delays and rejections. We solve <span>ocap</span> through integer linear programming and in particular by a “flow-like” formulation on a suitable network whose size is kept as small as possible. We validate both the quality of this formulation and the sequential decision process through some computational tests on real instances collected on the ground. We make these instances available to the scientific community.</div></div>","PeriodicalId":19529,"journal":{"name":"Omega-international Journal of Management Science","volume":"133 ","pages":"Article 103237"},"PeriodicalIF":6.7,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic assignment of delivery order bundles to in-store customers 向店内客户动态分配配送订单包

IF 6.7 2区管理学

Omega-international Journal of Management Science Pub Date : 2024-12-02 DOI: 10.1016/j.omega.2024.103246

Simona Mancini , Marlin W. Ulmer , Margaretha Gansterer

{"title":"Dynamic assignment of delivery order bundles to in-store customers","authors":"Simona Mancini , Marlin W. Ulmer , Margaretha Gansterer","doi":"10.1016/j.omega.2024.103246","DOIUrl":"10.1016/j.omega.2024.103246","url":null,"abstract":"<div><div>Many larger grocery stores offer home delivery services. However, the delivery cost is usually high and such services are rarely profitable. One way of reducing cost is by outsourcing some orders to in-store customers for a compensation. While initially single orders were dynamically assigned to customers, companies started exploring the assignment of order bundles instead to reduce per-order compensation and exploit consolidation potential. We investigate the value of dynamic assignment of bundles in this work. To this end, we consider a setting where all orders are known and, over time, unknown in-store customers enter the system for a short time and offer transportation of bundles of orders for compensation. The store decides dynamically which bundle to assign to which in-store customer (if any). At the end of the time horizon, the remaining orders are delivered by a dedicated fleet of store employees. The goal of the store is to minimize the compensation prices together with the delivery cost. We propose a threshold-based policy with scenario-based tuning. Popularity and compensation price thresholds are determined a priori by solving a set of perfect information scenarios. In every state, bundles are only assigned if they are popular enough and the compensation is comparably low. The thresholds (i.e., popularity threshold and compensation threshold) are adapted over time to account for the decrease in assignment opportunities. We show the effectiveness of our policy in a comprehensive computational study and highlight the value of bundle assignments compared to assigning individual orders. We further show that our strategy not only reduces the compensation paid to in-store customers but also the final routing cost.</div></div>","PeriodicalId":19529,"journal":{"name":"Omega-international Journal of Management Science","volume":"133 ","pages":"Article 103246"},"PeriodicalIF":6.7,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

How does customer enterprise digitalization improve the green total factor productivity of state-owned suppliers: From the supply chain perspective 客户企业数字化如何提高国有供应商绿色全要素生产率：基于供应链视角

IF 6.7 2区管理学

Omega-international Journal of Management Science Pub Date : 2024-11-29 DOI: 10.1016/j.omega.2024.103248

Huanhuan Jin , Nanyue Jiang , Weihua Su , Streimikiene Dalia

{"title":"How does customer enterprise digitalization improve the green total factor productivity of state-owned suppliers: From the supply chain perspective","authors":"Huanhuan Jin , Nanyue Jiang , Weihua Su , Streimikiene Dalia","doi":"10.1016/j.omega.2024.103248","DOIUrl":"10.1016/j.omega.2024.103248","url":null,"abstract":"<div><div>Environmental problems arising from global industrialization highlight the urgent need to green supply chains. However, the intensification of digitalization and global supply chain risks underscore the leading role of state-owned suppliers. From the supply chain perspective, this study analyzes the impact of the digitalization of downstream customer enterprises on the green total factor productivity (GTFP) of state-owned upstream suppliers using data on Chinese listed companies from 2007 to 2022. The benchmark regression shows that the digitalization of downstream customer enterprises significantly improves the GTFP of state-owned upstream suppliers. Mechanism testing shows that the digitalization of downstream customer enterprises promotes the GTFP of state-owned suppliers by reducing implicit costs and increasing the proportion of highly educated human resources. In improving the GTFP of state-owned suppliers, the external contractual environment, internal environmental responsibility, and market competitiveness act as “accelerators,” whereas the intensity of environmental regulation acts as a “speed bump” in the short term. In contrast to existing research, which mainly focuses on the impact of enterprise digitalization on the production efficiency of internal or upstream suppliers, this study facilitates the understanding of the pillar role of state-owned suppliers in the national economy and their stabilizing function in the supply chain.</div></div>","PeriodicalId":19529,"journal":{"name":"Omega-international Journal of Management Science","volume":"133 ","pages":"Article 103248"},"PeriodicalIF":6.7,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Revenue distribution in streaming 流媒体的收益分配

IF 6.7 2区管理学

Omega-international Journal of Management Science Pub Date : 2024-11-28 DOI: 10.1016/j.omega.2024.103233

Juan Carlos Gonçalves-Dosantos , Ricardo Martínez , Joaquín Sánchez-Soriano

{"title":"Revenue distribution in streaming","authors":"Juan Carlos Gonçalves-Dosantos , Ricardo Martínez , Joaquín Sánchez-Soriano","doi":"10.1016/j.omega.2024.103233","DOIUrl":"10.1016/j.omega.2024.103233","url":null,"abstract":"<div><div>The streaming industry has experienced exponential growth over the past decade. Streaming platforms provide subscribers with unlimited access to a diverse range of services, including movies, TV shows, and music, in exchange for a subscription fee. We take an axiomatic approach to the problem of how to share the overall revenue obtained from subscription sales among services or content producers. In doing so, we provide normative justifications for several distribution rules. We formulate several axioms that convey ethical and operational principles. In the first group, we consider properties that guarantee equal and impartial treatment of services and subscribers. In the second group, we introduce requirements designed to safeguard allocation schemes from inconvenient alterations, namely, changes in the units of measurement of inputs, subscription sharing, or group decomposition. Our analysis reveals that different combinations of these axioms define two classes of rules that strike a balance between three focal schemes, each representing distinct perspectives on the egalitarian and proportional principles. To illustrate the practical implications of our theoretical model, we explore its potential application by assessing how various types of content impact the revenues of some of the most well-known Twitch streamers.</div></div>","PeriodicalId":19529,"journal":{"name":"Omega-international Journal of Management Science","volume":"132 ","pages":"Article 103233"},"PeriodicalIF":6.7,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Learning about tail risk: Machine learning and combination with regularization in market risk management 尾部风险的学习：市场风险管理中的机器学习与正则化的结合

IF 6.7 2区管理学

Omega-international Journal of Management Science Pub Date : 2024-11-28 DOI: 10.1016/j.omega.2024.103249

Shuai Wang , Qian Wang , Helen Lu , Dongxue Zhang , Qianyi Xing , Jianzhou Wang

{"title":"Learning about tail risk: Machine learning and combination with regularization in market risk management","authors":"Shuai Wang , Qian Wang , Helen Lu , Dongxue Zhang , Qianyi Xing , Jianzhou Wang","doi":"10.1016/j.omega.2024.103249","DOIUrl":"10.1016/j.omega.2024.103249","url":null,"abstract":"<div><div>High-quality risk management is the key to ensuring the safe, efficient, and stable operation of the financial system. The current Basel Accord requires financial institutions to regularly calculate and disclose Value at Risk (VaR) and Expected Shortfall (ES) measures. However, the inaccuracy and instability of traditional risk models have reduced users' confidence. Therefore, we propose two new probabilistic deep learning frameworks for estimating VaR and ES. The trained first framework can output expectiles that are more sensitive to tail risks to map VaR and ES measures. In the second framework, we propose to approximate VaR and ES measures with spline quantile function and estimate the parameters by designing various deep learning architectures. To ensure the effectiveness of the proposed architectures, we derived the training loss and constraints for them. In addition, we solve the problem that existing machine learning risk models are difficult to estimate ES. In this way, combining various individual risk models has great potential for risk management. Therefore, we propose a regularization-based combination framework that adaptively selects and shrinks individual risk models. The developed individual methods and combinations outperform existing methods in backtesting, assisting financial institutions to allocate capital more effectively according to the Basel Capital Accord.</div></div>","PeriodicalId":19529,"journal":{"name":"Omega-international Journal of Management Science","volume":"133 ","pages":"Article 103249"},"PeriodicalIF":6.7,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A New Integrated Approach for Evaluating Sustainable Development in the Electric Vehicle Sector 电动汽车行业可持续发展综合评价新方法

IF 6.7 2区管理学

Omega-international Journal of Management Science Pub Date : 2024-11-28 DOI: 10.1016/j.omega.2024.103247

Wen-Min Lu , Chien-Heng Chou , Irene Wei Kiong Ting , Shang-Ming Liu

{"title":"A New Integrated Approach for Evaluating Sustainable Development in the Electric Vehicle Sector","authors":"Wen-Min Lu , Chien-Heng Chou , Irene Wei Kiong Ting , Shang-Ming Liu","doi":"10.1016/j.omega.2024.103247","DOIUrl":"10.1016/j.omega.2024.103247","url":null,"abstract":"<div><div>This study develops an innovative value creation process for the electric vehicle (EV) industry. First, this study conducts data envelopment analysis to measure the innovation, operation, and market efficiency performance of the EV industry. Second, this study conducts bootstrapped truncated regression to explore the impact of environmental, social, and governance (ESG) factors on the performance of the EV industry. Third, this study uses the classification & regression tree (CART), random forest, and eXtreme gradient boosting (XGBoost) algorithms to assist managers in identifying the key predictive variables for further classification and prediction. Results reveal significant differences in innovation performance across five industry sectors, among which the charging pile system sector exhibits the highest average value, and the battery system sector exhibits the lowest average value. The truncated regression analysis shows that innovation performance in Taiwan's EV industry is significantly influenced by energy management, data security, employee information statistics, and control over equity and board seats. Corporate governance transparency positively impacts operational performance, while energy and water management enhance market performance, with product quality and safety having a negative effect on market performance. This study identifies the relative importance of the classification attribute variables based on the classification rules of the target attributes by conducting further analysis with the CART decision model and constructs an optimal prediction model.</div></div>","PeriodicalId":19529,"journal":{"name":"Omega-international Journal of Management Science","volume":"133 ","pages":"Article 103247"},"PeriodicalIF":6.7,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Partner selection for supply chain collaboration: New data envelopment analysis models 供应链合作伙伴选择：新的数据包络分析模型

IF 6.7 2区管理学

Omega-international Journal of Management Science Pub Date : 2024-11-26 DOI: 10.1016/j.omega.2024.103245

Lili Liu , Sheng Ang , Feng Yang , Xiaoqi Zhang

{"title":"Partner selection for supply chain collaboration: New data envelopment analysis models","authors":"Lili Liu , Sheng Ang , Feng Yang , Xiaoqi Zhang","doi":"10.1016/j.omega.2024.103245","DOIUrl":"10.1016/j.omega.2024.103245","url":null,"abstract":"<div><div>Partner selection is crucial for ensuring successful supply chain collaboration. This study focuses on selecting the best partner for a predefined two-stage supply chain using data envelopment analysis to assess the performance of collaborative systems. We distinguish between two levels of supply chain collaboration: chain-to-chain and stage-to-stage collaboration. The former involves partner selection within the same supply chain across two stages, while the latter allows for selected partners from different supply chains across two stages. We incorporate the technology learning effect and introduce three degrees of collaboration (minor, major, and medium) for both chain and stage collaboration levels. Solutions are provided for each collaboration level and degree, with comparative analysis indicating that major collaboration in stage-to-stage level yields superior performance. A numerical example and a real-world case study are presented to illustrate our models and findings, demonstrating that our approach offers superior benefits and more flexible options compared to existing methods. Thus, the proposed approach not only contributes to advancing theoretical understanding but also provides practical implications for optimizing collaborative relationships within complex multi-stage supply chain environments.</div></div>","PeriodicalId":19529,"journal":{"name":"Omega-international Journal of Management Science","volume":"132 ","pages":"Article 103245"},"PeriodicalIF":6.7,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0