Research in Transportation Economics最新文献

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Key factors for developing freight and passenger integrated transportation systems in Brazil 巴西发展客货运综合运输系统的关键因素
IF 3.8 3区 工程技术
Research in Transportation Economics Pub Date : 2024-03-20 DOI: 10.1016/j.retrec.2024.101425
Isabela Kopperschmidt de Oliveira , Leonardo Herszon Meira , Leise Kelli Oliveira
{"title":"Key factors for developing freight and passenger integrated transportation systems in Brazil","authors":"Isabela Kopperschmidt de Oliveira ,&nbsp;Leonardo Herszon Meira ,&nbsp;Leise Kelli Oliveira","doi":"10.1016/j.retrec.2024.101425","DOIUrl":"10.1016/j.retrec.2024.101425","url":null,"abstract":"<div><p>The intensification of e-commerce increases freight movements in urban areas, which negatively contributes to promoting sustainable cities. Conversely, the spare capacity of the public transport system could reduce the externalities of urban freight transport and then promote sustainable cities. This article identifies and evaluates key factors for developing integrated freight and public transport systems. Key factors were identified with a literature review and then classified into benefits and barriers related to the urban environment, and challenges and strengths related to the transport operation. Subsequently, these factors were evaluated by experts and classified by estimating a Luce model. The results indicate that benefits are related to the fight against climate change by optimising urban space and reducing the movements of freight vehicles. Barriers are associated with the lack of a collaborative culture and the need to change consumer behaviour, which helps to promote collaboration and reduce just-in-time demand. For the transport operation, the integration of people and freight systems can reduce operational costs, increase the efficiency of the transport system, and improve the accessibility for people and goods, while promoting economic development by decentralising economic activity. To achieve these benefits, the main challenges concern the logistic activity and the cooperation of stakeholders.</p></div>","PeriodicalId":47810,"journal":{"name":"Research in Transportation Economics","volume":"104 ","pages":"Article 101425"},"PeriodicalIF":3.8,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140274531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
What are the determinants of road users' experiences with congestion: Econometric assessment using ordered response models 道路使用者对拥堵体验的决定因素是什么?使用有序响应模型进行计量经济学评估
IF 3.8 3区 工程技术
Research in Transportation Economics Pub Date : 2024-03-18 DOI: 10.1016/j.retrec.2024.101423
James Odeck , Marie Aarestrup Aasness
{"title":"What are the determinants of road users' experiences with congestion: Econometric assessment using ordered response models","authors":"James Odeck ,&nbsp;Marie Aarestrup Aasness","doi":"10.1016/j.retrec.2024.101423","DOIUrl":"https://doi.org/10.1016/j.retrec.2024.101423","url":null,"abstract":"<div><p>We investigate factors that determine road users' experiences with congestion based on a questionnaire survey conducted in the Oslo area of Norway. The rationale is to add more knowledge on factors that determine users' experience with congestion. Furthermore, we use a succinct econometric framework to assess the data. We find that the following factors influence road users' experiences with congestion: (1) whether they experienced congestion on their reference trip; (2) how often road users undertake trips during congestion; (3) the extent to which road users had potential alternative modes of transport other than car use; (4) education; (5) whether respondents had time commitments at their destinations; (6) travel time used during their journey; (7) how often they experience congestion as a problem during their journey; (8) when participants begin to experience discomfort with congestion; and (9) age. The direction of these factors' impact on experience is explained in the results section. For example, those who did not experience congestion on their previous trip are 26 percentage points more likely to report a negative experience with congestion than those who did. The results provide new insight into the factors that determine road users' experience with congestion. Finally, we warn that one should not be indifferent regarding the logit models used, as the results can be quite different.</p></div>","PeriodicalId":47810,"journal":{"name":"Research in Transportation Economics","volume":"104 ","pages":"Article 101423"},"PeriodicalIF":3.8,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0739885924000180/pdfft?md5=0ca3c5a4aa86507336d524d2a1542021&pid=1-s2.0-S0739885924000180-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140145107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Booking versus search-based parking strategy: A game-theoretic methodology 基于预订和搜索的停车策略:博弈论方法
IF 3.8 3区 工程技术
Research in Transportation Economics Pub Date : 2024-03-02 DOI: 10.1016/j.retrec.2024.101416
Bing Qing Tan , Su Xiu Xu , Matthias Thürer , Kai Kang , Zhiheng Zhao , Ming Li
{"title":"Booking versus search-based parking strategy: A game-theoretic methodology","authors":"Bing Qing Tan ,&nbsp;Su Xiu Xu ,&nbsp;Matthias Thürer ,&nbsp;Kai Kang ,&nbsp;Zhiheng Zhao ,&nbsp;Ming Li","doi":"10.1016/j.retrec.2024.101416","DOIUrl":"https://doi.org/10.1016/j.retrec.2024.101416","url":null,"abstract":"<div><p>With the proliferation of digital platforms, the parking landscape has undergone a transformation, offering more than the traditional first-come-first-served parking option. The reservation-based parking mode has gained considerable popularity. Obviously, there is a competitive relationship between these two parking modes, posing a challenge for parking management authorities to achieve a balance. This study investigates pricing strategies in a duopoly parking market, comprising two distinct types of parking companies: search-based and reservation-based. We analyze three power structure models: (i) the Bertrand model, (ii) the Stackelberg model with the reservation-based parking company as a leader, and (iii) the Stackelberg model with the search-based parking company as a leader. Additionally, we develop a three-player game model that considers the involvement of the third-party investor in the reservation mode. Our findings indicate that the overall profit of the search-based parking company declines when the driver preference of reservation-based parking company increases. Moreover, reservation-based parking companies exhibit greater robustness compared to their search-based counterparts when facing penalty delays and fluctuations in waiting costs. Furthermore, a prudent evaluation is advised for the third-party investor when assessing investment opportunities, especially in scenarios where drivers demonstrate a pronounced preference for search-based parking companies.</p></div>","PeriodicalId":47810,"journal":{"name":"Research in Transportation Economics","volume":"104 ","pages":"Article 101416"},"PeriodicalIF":3.8,"publicationDate":"2024-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140013920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Editorial: Thredbo 17 conference 编者按:Thredbo 17会议
IF 3.8 3区 工程技术
Research in Transportation Economics Pub Date : 2024-03-01 DOI: 10.1016/j.retrec.2023.101373
David A. Hensher, Rico Merkert, John Nelson, Rebecca Connell, Ruth Steel
{"title":"Editorial: Thredbo 17 conference","authors":"David A. Hensher,&nbsp;Rico Merkert,&nbsp;John Nelson,&nbsp;Rebecca Connell,&nbsp;Ruth Steel","doi":"10.1016/j.retrec.2023.101373","DOIUrl":"10.1016/j.retrec.2023.101373","url":null,"abstract":"","PeriodicalId":47810,"journal":{"name":"Research in Transportation Economics","volume":"103 ","pages":"Article 101373"},"PeriodicalIF":3.8,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0739885923001130/pdfft?md5=f9612e9b13056da4e76c7a58c34c8d1f&pid=1-s2.0-S0739885923001130-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138519355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The retailer perspective on the potential for using urban consolidation centres (UCCs) 零售商对利用城市配送中心(UCC)潜力的看法
IF 3.8 3区 工程技术
Research in Transportation Economics Pub Date : 2024-02-28 DOI: 10.1016/j.retrec.2024.101413
Emine Zehra Akgün , Jason Monios , Jonathan Cowie , Achille Fonzone
{"title":"The retailer perspective on the potential for using urban consolidation centres (UCCs)","authors":"Emine Zehra Akgün ,&nbsp;Jason Monios ,&nbsp;Jonathan Cowie ,&nbsp;Achille Fonzone","doi":"10.1016/j.retrec.2024.101413","DOIUrl":"https://doi.org/10.1016/j.retrec.2024.101413","url":null,"abstract":"<div><p>This paper examines the role of supportive policies and value-added services which may incentivise retailers to use an urban consolidation centre (UCC). The methodology is a case study of the city of Edinburgh, Scotland, based on semi-structured interviews with 30 retailers. Results show that retailers are generally not positive towards using UCCs, and the services that they need are already being provided by their existing logistics service providers (LSPs). Nevertheless, if they were forced by restrictions and rising costs to use a UCC, they would be prepared to do so. In that case, they would want those services currently provided by LSPs to be provided by the UCC and would be prepared to pay for them. For a successful transfer to a UCC model, the retailer, LSP and UCC would need to work together to avoid loss of revenue to the LSP.</p></div>","PeriodicalId":47810,"journal":{"name":"Research in Transportation Economics","volume":"103 ","pages":"Article 101413"},"PeriodicalIF":3.8,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0739885924000088/pdfft?md5=a0e71ea4e8616b6d32527edc7a0d438a&pid=1-s2.0-S0739885924000088-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139986401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The structural and spatial evolution of the China Railway Express network 中国铁路快运网络的结构和空间演变
IF 3.8 3区 工程技术
Research in Transportation Economics Pub Date : 2024-02-28 DOI: 10.1016/j.retrec.2024.101414
Peipei Qian, Zhongzhen Yang, Feng Lian
{"title":"The structural and spatial evolution of the China Railway Express network","authors":"Peipei Qian,&nbsp;Zhongzhen Yang,&nbsp;Feng Lian","doi":"10.1016/j.retrec.2024.101414","DOIUrl":"https://doi.org/10.1016/j.retrec.2024.101414","url":null,"abstract":"<div><p>To illustrate the structural and spatial evolution of the China Railway Express (CR-Express) network, this paper adopts the Space-P method to construct three complex networks of the CR-Express routes respectively by the block train data in 2013, 2016 and 2019, and the indices of overall network structure (average degree, average path length, and average clustering coefficient) and indices of node importance (degree centrality and betweenness centrality) in the networks are comparatively analyzed. It is shown that the CR-Express network has become more complicated, but in 2016 the overall structure was basically stable, and consistently presents clear small-world and scale-free characteristics. The nodes in the network can be partitioned into four groups based on their influence on network connectivity and the number of block trains departing from them, namely core nodes, freight demand nodes, key nodes and edge nodes. Among them, core nodes and freight demand nodes are located in the central and western regions during the whole study period, and the newly added nodes in the eastern region from 2016 to 2019 are edge nodes. Based on the above analysis, we capture the evolving nature of the CR-Express network across distinct development stages under the influence of policy, economy, geographical location and other factors, and put forward operational suggestions to optimize the CR-Express service, strengthen the maintenance of key nodes, and ensure the efficient operation of China-Europe trains.</p></div>","PeriodicalId":47810,"journal":{"name":"Research in Transportation Economics","volume":"103 ","pages":"Article 101414"},"PeriodicalIF":3.8,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139986402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Commuter and non-commuter preferences for plug-in hybrid electric vehicle: A case study of Delhi and Kolkata, India 通勤者和非通勤者对插电式混合动力电动汽车的偏好:印度德里和加尔各答案例研究
IF 3.8 3区 工程技术
Research in Transportation Economics Pub Date : 2024-02-26 DOI: 10.1016/j.retrec.2024.101415
Reema Bera Sharma , Bandhan Bandhu Majumdar , Bhargab Maitra
{"title":"Commuter and non-commuter preferences for plug-in hybrid electric vehicle: A case study of Delhi and Kolkata, India","authors":"Reema Bera Sharma ,&nbsp;Bandhan Bandhu Majumdar ,&nbsp;Bhargab Maitra","doi":"10.1016/j.retrec.2024.101415","DOIUrl":"https://doi.org/10.1016/j.retrec.2024.101415","url":null,"abstract":"<div><p>This paper investigates the commuter and non-commuter preferences for Plug-in Hybrid Electric Vehicles in two Indian metro cities namely Delhi and Kolkata based on a stated preference (SP) framework. The SP data collected from the car-owning population in each city were analyzed using Mixed Logit (ML) models to obtain the commuter and non-commuter respondents’ perceived benefit associated with PHEV operation-specific attributes in terms of willingness to pay (WTP). Thereafter, a sensitivity analysis was carried out to understand the impact of improvement in related attributes on consumer preferences towards PHEVs. The findings suggest an added focus by car manufacturers on fuel cost savings, battery recharging time, battery range, tailpipe emission, and battery warranty to attract commuters. This study also highlights that high purchase cost and lack of public charging stations are key barriers towards PHEV adoption. Based on study results, policy actions such as higher subsidy, increased public charging stations, and public educational and awareness campaigns by Government could play a major role towards wider diffusion of PHEVs in Indian context.</p></div>","PeriodicalId":47810,"journal":{"name":"Research in Transportation Economics","volume":"103 ","pages":"Article 101415"},"PeriodicalIF":3.8,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0739885924000106/pdfft?md5=d8b3f7de0e1611751686b192c7c786da&pid=1-s2.0-S0739885924000106-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139975992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Predicting trips to health care facilities: A binary logit and receiver operating characteristics (ROC) approach 预测前往医疗机构的次数:二元对数和接收器操作特征 (ROC) 方法
IF 3.8 3区 工程技术
Research in Transportation Economics Pub Date : 2024-02-13 DOI: 10.1016/j.retrec.2024.101411
Patrick McCarthy
{"title":"Predicting trips to health care facilities: A binary logit and receiver operating characteristics (ROC) approach","authors":"Patrick McCarthy","doi":"10.1016/j.retrec.2024.101411","DOIUrl":"https://doi.org/10.1016/j.retrec.2024.101411","url":null,"abstract":"<div><p>This paper discusses an overarching framework that integrates latent variable models and prediction success with receiver operator characteristics (ROC) curves. In three illustrative examples that focus on trip purpose, health market indicators, and resources, the paper employs binary logit models and ROC methodology to identify factors that best discriminate individuals' trips to out-patient health care facilities. Data for the examples are a three-year longitudinal survey of persons 45 years and older in China. The study contributes to the sparse empirical economics literature using ROC methodologies and more broadly to the transportation and health literatures. The ROC applications provide new insights on health care trips, finding that out-patient trips for treatment, paying out-of-pocket costs, and lack of monetary resources are salient discriminators in one's trip choice decisions.</p></div>","PeriodicalId":47810,"journal":{"name":"Research in Transportation Economics","volume":"103 ","pages":"Article 101411"},"PeriodicalIF":3.8,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139726615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fostering collaboration and coordination in urban delivery: a multi-agent microsimulation model 促进城市交付的合作与协调:多代理微观模拟模型
IF 3.8 3区 工程技术
Research in Transportation Economics Pub Date : 2024-02-09 DOI: 10.1016/j.retrec.2023.101402
Cristian Giovanny Gómez-Marín , Antonio Comi , Conrado Augusto Serna-Urán , Julián Andrés Zapata-Cortés
{"title":"Fostering collaboration and coordination in urban delivery: a multi-agent microsimulation model","authors":"Cristian Giovanny Gómez-Marín ,&nbsp;Antonio Comi ,&nbsp;Conrado Augusto Serna-Urán ,&nbsp;Julián Andrés Zapata-Cortés","doi":"10.1016/j.retrec.2023.101402","DOIUrl":"https://doi.org/10.1016/j.retrec.2023.101402","url":null,"abstract":"<div><p>Given the dynamic nature of Urban Freight Transport (UFT) processes, the involved transport and logistics operators face with internal and external issues that should tackle to improve last-mile levels of service and decrease total costs while performing delivery operations. Customers (i.e., freight receivers) perceive the level of service through the acceptance of their requests, while total operational costs are mainly determined by the total travel costs (i.e., distance and/or time) required to accomplish the customers' request. In addition, the vehicle-kilometres travelled are related to the externalities produced. Given that the actors involved in the process operate in a stochastic environment (with changes that can occur both in terms of demand – receivers' requests, and in supply – travel times), collaboration and coordination among the operators could play a key role in meeting the customers' requests as well as in reducing both internal and external delivery costs. Therefore, the paper proposes an UFT modelling framework that integrates collaboration and coordination processes among the different involved actors, and allows the benefits to be assessed. The model has a multi-agent architecture based on microsimulation. In particular, the multi-agent architecture allows us to point out the different actors’ responses to various internal (e.g., delivery requests) and external (e.g., delivery times) changes occurring in the daily delivery operations. It consists of three layers. The first one simulates the interactions among actors operating collaboratively. The second layer microsimulates the collaborative processes of information management. Finally, a third layer integrates the two previous layers, facilitating a decision-making process in such a dynamic context. The whole modelling framework is tested in a real case study in which it is possible to validate pros and cons of working in a collaborative and coordinative environment. The results show significant benefits from actors/operators involved in the process and subsequently can address the policy/measure implementation towards a more sustainable and liveable city.</p></div>","PeriodicalId":47810,"journal":{"name":"Research in Transportation Economics","volume":"103 ","pages":"Article 101402"},"PeriodicalIF":3.8,"publicationDate":"2024-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0739885923001427/pdfft?md5=3996b3b39fbbec51c862831c34e600fe&pid=1-s2.0-S0739885923001427-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139714551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sustainability assessment of inter-urban crowdshipping - A case study approach 城际众包的可持续性评估--案例研究法
IF 3.8 3区 工程技术
Research in Transportation Economics Pub Date : 2024-02-01 DOI: 10.1016/j.retrec.2024.101409
Usman Akbar , Avi Anand Jain , Svein Bråthen
{"title":"Sustainability assessment of inter-urban crowdshipping - A case study approach","authors":"Usman Akbar ,&nbsp;Avi Anand Jain ,&nbsp;Svein Bråthen","doi":"10.1016/j.retrec.2024.101409","DOIUrl":"https://doi.org/10.1016/j.retrec.2024.101409","url":null,"abstract":"<div><p>Given the severity and effects of global warming, countries are undertaking attempts to restrict emissions through research, carbon taxes, and other means and policies. Over the last decade, one promising emerging concept in the sharing economy has been crowdshipping. It is currently in its early phases, with little research on its sustainability, particularly while operating in inter-city or inter-urban areas. This study focuses on the sustainability assessment of inter-urban crowdshipping through a case study approach, where the existent literature is scarce. The research employs a multi method quantitative approach with a case study, where descriptive analysis is used to explore the case company's operations. It addresses the other research questions by performing environmental and financial impact assessment considering two relevant scenarios with postal services and transporter operations. Data from the carrier's (Nimber AS, Norway) platform were extracted over 6 months and complemented with a survey for analysis. When compared to alternative scenarios in which 3 PL service providers are utilized, crowdshipping appeared to contribute to lower emissions. It also seemed to be more cost-effective for the users. Unpublished evidence from the ongoing EU LEAD project suggests that access to micro-hubs could be one important urban logistics policy instrument to enhance efficiency for crowdshipping platforms.</p></div>","PeriodicalId":47810,"journal":{"name":"Research in Transportation Economics","volume":"103 ","pages":"Article 101409"},"PeriodicalIF":3.8,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0739885924000040/pdfft?md5=8cb503600ce573e571df1978ccac590d&pid=1-s2.0-S0739885924000040-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139674487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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