To adapt to the unique demand-supply features of accessory parking lots at passenger transport hubs,a mixed parking demand assignment method based on regression modeling is proposed.First,an optimal model aiming to mi...To adapt to the unique demand-supply features of accessory parking lots at passenger transport hubs,a mixed parking demand assignment method based on regression modeling is proposed.First,an optimal model aiming to minimize total time expenditure is constructed.It incorporates parking search time,walking time,and departure time,focusing on short-term parking features.Then,the information dimensions that the parking lot can obtain are evaluated,and three assignment strategies based on three types of regression models-linear regression(LR),extreme gradient boosting(XGBoost),and multilayer perceptron(MLP)-are proposed.A parking process simulation model is built using the traffic simulation package SUMO to facilitate data collection,model training,and case studies.Finally,the performance of the three strategies is com-pared,revealing that the XGBoost-based strategy performs the best in case parking lots,which reduces time expendi-ture by 29.3%and 37.2%,respectively,compared with the MLP-based strategy and LR-based strategy.This method offers diverse options for practical parking manage-ment.展开更多
In the future smart cities,parking lots(PLs)can accommodate hundreds of electric vehicles(EVs)at the same time.This trend creates an opportunity for PLs to serve as a potential flexibility resource,considering growing...In the future smart cities,parking lots(PLs)can accommodate hundreds of electric vehicles(EVs)at the same time.This trend creates an opportunity for PLs to serve as a potential flexibility resource,considering growing penetration of EVs and integration of distributed energy resources DER(such as photovoltaic and energy storages).Given this background,this paper proposes a comprehensive evaluation framework to investigate the potential role of DER-integrated PLs(DPL)with the capability of vehicle-to-grid(V2G)in improving the reliability of the distribution network.For this aim,first,an overview for the distribution system with DPLs is provided.Then,a generic model for the available generation capacity(AGC)of DPLs with consideration of EV scheduling strategy is developed.On the above basis,an iterative-based algorithm leveraging sequential Monte Carlo simulation is presented to quantify the contribution of DPLs to the reliability of the system.In order to verify the effectiveness of the proposed method,a series of numerical studies are carried out.The simulation results show that the integration of DPLs with the V2G capability could help to improve the reliability performance of distribution grid to a great extent and reduce the adverse impact incurred by EV accommodation,if utilized properly.展开更多
Last October, the Nanjing-based aiwan, Hongkong, Macao and verseas Chinese Literature Society went to Wulong Pool. Zhang Chao, vice-chairman of the society, invited me to go to see the place with him. We went eastward...Last October, the Nanjing-based aiwan, Hongkong, Macao and verseas Chinese Literature Society went to Wulong Pool. Zhang Chao, vice-chairman of the society, invited me to go to see the place with him. We went eastward out of Longpanli along bustling and seething Guangzhou Avenue. by the side of the high Suolong Bridge, we found a garden gate with flower-展开更多
In order to solve the contradiction between the rapid growth of urban motor vehicles and the lack of road traffic resources to fundamentally improve the problem of "difficult driving and difficult parking", ...In order to solve the contradiction between the rapid growth of urban motor vehicles and the lack of road traffic resources to fundamentally improve the problem of "difficult driving and difficult parking", it is necessary to carry out scientific planning and design of urban parking lots. The study analyzed the main problems of urban parking, discussed the planning principles and countermeasures of parking lot planning, and briefly introduced the practical experience of the special parking lot planning of the central urban area in Xiajiang County, Ji’an City, Jiangxi Province. It is hoped that through parking lot planning, the contradiction between supply and demand of urban parking can be effectively alleviated and the urban traffic environment can be improved.展开更多
Despite cities being recognized as being potential sources of microplastic pollution to the wider environment, most surveys of COVID-19 plastic-based litter have been undertaken through linear transects of marine beac...Despite cities being recognized as being potential sources of microplastic pollution to the wider environment, most surveys of COVID-19 plastic-based litter have been undertaken through linear transects of marine beaches. For the far fewer number of studies conducted on inland and urban locations, the site-specific focus has primarily been surveys along the length of streets. The present study is the first to specifically assess the standing stock (i.e., moment-in-time) of littered face masks for the entire surface area of urban parking lots. The density of face masks in 50 parking lots in a Canadian coastal town (0.00054 m2 ± 0.00051 m2) was found to be significantly greater than the background level of littering of town streets. Face mask density was significantly related to visitation “usage” of parking lots as gauged by the areal size of the lots and of their onsite buildings, as well as the number of vehicles present. Neither parking lot typology nor estimates of inferred export (various measures of wind exposure) and entrapment (various metrics of obstruction) of face masks had a significant influence on the extent of whole-lot littering. In consequence, modelling of the potential input of mask-derived microplastics to the marine environment from coastal communities can use the areal density of face masks found here in association with the total surface area of lots for individual municipalities as determined through GIS analysis.展开更多
This work addresses bi-objective hybrid flow shop scheduling problems considering consistent sublots(Bi-HFSP_CS).The objectives are to minimize the makespan and total energy consumption.First,the Bi-HFSP_CS is formali...This work addresses bi-objective hybrid flow shop scheduling problems considering consistent sublots(Bi-HFSP_CS).The objectives are to minimize the makespan and total energy consumption.First,the Bi-HFSP_CS is formalized,followed by the establishment of a mathematical model.Second,enhanced version of the artificial bee colony(ABC)algorithms is proposed for tackling the Bi-HFSP_CS.Then,fourteen local search operators are employed to search for better solutions.Two different Q-learning tactics are developed to embed into the ABC algorithm to guide the selection of operators throughout the iteration process.Finally,the proposed tactics are assessed for their efficacy through a comparison of the ABC algorithm,its three variants,and three effective algorithms in resolving 95 instances of 35 different problems.The experimental results and analysis showcase that the enhanced ABC algorithm combined with Q-learning(QABC1)demonstrates as the top performer for solving concerned problems.This study introduces a novel approach to solve the Bi-HFSP_CS and illustrates its efficacy and superior competitive strength,offering beneficial perspectives for exploration and research in relevant domains.展开更多
LOT(License on Transfer)网络是应对专利主张实体诉讼风险的专利防御市场机制,其目的是降低企业的专利风险。然而,企业加入LOT网络的收益并不容易量化。本文通过简述加入LOT网络的投资回报模型,分析中国企业加入LOT网络的收益以及对公...LOT(License on Transfer)网络是应对专利主张实体诉讼风险的专利防御市场机制,其目的是降低企业的专利风险。然而,企业加入LOT网络的收益并不容易量化。本文通过简述加入LOT网络的投资回报模型,分析中国企业加入LOT网络的收益以及对公司业绩的影响。研究发现,对于在海外业务较多或只在较窄技术领域有专利申请、采用防御性专利战略的中国企业而言,加入LOT网络能有较高的投资回报比。本研究可为中国企业抵御专利主张实体的诉讼风险,制定专利防御策略,以及量化评估加入LOT网络的价值提供参考。展开更多
笔者在中国文化背景下对生活定向测验(Life Orientation Test ;LOT)与其修订版(LOT-R)的维度进行验证.采用主成分分析结合平行分析保留主成分数目,同时采用验证性因素分析比较不同模型对生活定向测验及其修订版反应数据的拟合.大多数测...笔者在中国文化背景下对生活定向测验(Life Orientation Test ;LOT)与其修订版(LOT-R)的维度进行验证.采用主成分分析结合平行分析保留主成分数目,同时采用验证性因素分析比较不同模型对生活定向测验及其修订版反应数据的拟合.大多数测验形式都呈现出两个维度,违背了测验编制者假定的单维性,与西方大多数研究者的结果一致,但是得到的两个维度是有实质意义的还是由于项目形式造成的则很难确定.在传统的因素分析框架下很难解决生活定向测验的维度争议,未来的研究应该从项目反应的理想点过程出发对该测验的维度进行探索和验证.展开更多
基金The National Natural Science Foundation of China(No.52302388)the Natural Science Foundation of Jiangsu Province(No.BK20230853).
文摘To adapt to the unique demand-supply features of accessory parking lots at passenger transport hubs,a mixed parking demand assignment method based on regression modeling is proposed.First,an optimal model aiming to minimize total time expenditure is constructed.It incorporates parking search time,walking time,and departure time,focusing on short-term parking features.Then,the information dimensions that the parking lot can obtain are evaluated,and three assignment strategies based on three types of regression models-linear regression(LR),extreme gradient boosting(XGBoost),and multilayer perceptron(MLP)-are proposed.A parking process simulation model is built using the traffic simulation package SUMO to facilitate data collection,model training,and case studies.Finally,the performance of the three strategies is com-pared,revealing that the XGBoost-based strategy performs the best in case parking lots,which reduces time expendi-ture by 29.3%and 37.2%,respectively,compared with the MLP-based strategy and LR-based strategy.This method offers diverse options for practical parking manage-ment.
基金financially supported by the National Social Science Fund of China(No.19ZDA081)Fundamental Research Funds for the Central Universities(No.2020MS067).
文摘In the future smart cities,parking lots(PLs)can accommodate hundreds of electric vehicles(EVs)at the same time.This trend creates an opportunity for PLs to serve as a potential flexibility resource,considering growing penetration of EVs and integration of distributed energy resources DER(such as photovoltaic and energy storages).Given this background,this paper proposes a comprehensive evaluation framework to investigate the potential role of DER-integrated PLs(DPL)with the capability of vehicle-to-grid(V2G)in improving the reliability of the distribution network.For this aim,first,an overview for the distribution system with DPLs is provided.Then,a generic model for the available generation capacity(AGC)of DPLs with consideration of EV scheduling strategy is developed.On the above basis,an iterative-based algorithm leveraging sequential Monte Carlo simulation is presented to quantify the contribution of DPLs to the reliability of the system.In order to verify the effectiveness of the proposed method,a series of numerical studies are carried out.The simulation results show that the integration of DPLs with the V2G capability could help to improve the reliability performance of distribution grid to a great extent and reduce the adverse impact incurred by EV accommodation,if utilized properly.
文摘Last October, the Nanjing-based aiwan, Hongkong, Macao and verseas Chinese Literature Society went to Wulong Pool. Zhang Chao, vice-chairman of the society, invited me to go to see the place with him. We went eastward out of Longpanli along bustling and seething Guangzhou Avenue. by the side of the high Suolong Bridge, we found a garden gate with flower-
文摘In order to solve the contradiction between the rapid growth of urban motor vehicles and the lack of road traffic resources to fundamentally improve the problem of "difficult driving and difficult parking", it is necessary to carry out scientific planning and design of urban parking lots. The study analyzed the main problems of urban parking, discussed the planning principles and countermeasures of parking lot planning, and briefly introduced the practical experience of the special parking lot planning of the central urban area in Xiajiang County, Ji’an City, Jiangxi Province. It is hoped that through parking lot planning, the contradiction between supply and demand of urban parking can be effectively alleviated and the urban traffic environment can be improved.
文摘Despite cities being recognized as being potential sources of microplastic pollution to the wider environment, most surveys of COVID-19 plastic-based litter have been undertaken through linear transects of marine beaches. For the far fewer number of studies conducted on inland and urban locations, the site-specific focus has primarily been surveys along the length of streets. The present study is the first to specifically assess the standing stock (i.e., moment-in-time) of littered face masks for the entire surface area of urban parking lots. The density of face masks in 50 parking lots in a Canadian coastal town (0.00054 m2 ± 0.00051 m2) was found to be significantly greater than the background level of littering of town streets. Face mask density was significantly related to visitation “usage” of parking lots as gauged by the areal size of the lots and of their onsite buildings, as well as the number of vehicles present. Neither parking lot typology nor estimates of inferred export (various measures of wind exposure) and entrapment (various metrics of obstruction) of face masks had a significant influence on the extent of whole-lot littering. In consequence, modelling of the potential input of mask-derived microplastics to the marine environment from coastal communities can use the areal density of face masks found here in association with the total surface area of lots for individual municipalities as determined through GIS analysis.
基金supported by the National Natural Science Foundation of China(No.62173356)Science and Technology Development Fund(FDCT),Macao SAR(No.0019/2021/A)+2 种基金Zhuhai Industry-University-Research Project with Hongkong and Macao(No.ZH22017002210014PWC)Guangdong Basic and Applied Basic Research Foundation(No.2023A1515011531)Key Technologies for Scheduling and Optimization of Complex Distributed Manufacturing Systems(No.22JR10KA007).
文摘This work addresses bi-objective hybrid flow shop scheduling problems considering consistent sublots(Bi-HFSP_CS).The objectives are to minimize the makespan and total energy consumption.First,the Bi-HFSP_CS is formalized,followed by the establishment of a mathematical model.Second,enhanced version of the artificial bee colony(ABC)algorithms is proposed for tackling the Bi-HFSP_CS.Then,fourteen local search operators are employed to search for better solutions.Two different Q-learning tactics are developed to embed into the ABC algorithm to guide the selection of operators throughout the iteration process.Finally,the proposed tactics are assessed for their efficacy through a comparison of the ABC algorithm,its three variants,and three effective algorithms in resolving 95 instances of 35 different problems.The experimental results and analysis showcase that the enhanced ABC algorithm combined with Q-learning(QABC1)demonstrates as the top performer for solving concerned problems.This study introduces a novel approach to solve the Bi-HFSP_CS and illustrates its efficacy and superior competitive strength,offering beneficial perspectives for exploration and research in relevant domains.
文摘LOT(License on Transfer)网络是应对专利主张实体诉讼风险的专利防御市场机制,其目的是降低企业的专利风险。然而,企业加入LOT网络的收益并不容易量化。本文通过简述加入LOT网络的投资回报模型,分析中国企业加入LOT网络的收益以及对公司业绩的影响。研究发现,对于在海外业务较多或只在较窄技术领域有专利申请、采用防御性专利战略的中国企业而言,加入LOT网络能有较高的投资回报比。本研究可为中国企业抵御专利主张实体的诉讼风险,制定专利防御策略,以及量化评估加入LOT网络的价值提供参考。
文摘笔者在中国文化背景下对生活定向测验(Life Orientation Test ;LOT)与其修订版(LOT-R)的维度进行验证.采用主成分分析结合平行分析保留主成分数目,同时采用验证性因素分析比较不同模型对生活定向测验及其修订版反应数据的拟合.大多数测验形式都呈现出两个维度,违背了测验编制者假定的单维性,与西方大多数研究者的结果一致,但是得到的两个维度是有实质意义的还是由于项目形式造成的则很难确定.在传统的因素分析框架下很难解决生活定向测验的维度争议,未来的研究应该从项目反应的理想点过程出发对该测验的维度进行探索和验证.
