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
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
针对目前智能楼宇监测中数据可靠性低、测量点位分散、数据传输实时性不高和误报频繁等问题,提出基于物联网(Internet of Things,IoT)技术的智能楼宇监测系统设计。首先,采用ZigBee技术组建无线传感器网络,实现分散点位传感器数据的收集...针对目前智能楼宇监测中数据可靠性低、测量点位分散、数据传输实时性不高和误报频繁等问题,提出基于物联网(Internet of Things,IoT)技术的智能楼宇监测系统设计。首先,采用ZigBee技术组建无线传感器网络,实现分散点位传感器数据的收集,并将数据通过网关传输到物联网云平台。其次,利用改进的自适应加权算法融合传感器数据,有效提升多传感器检测数据的准确性。系统云平台能够分析和展示传感器数据,而且能够实时查看待测区域的视频图像,预留数据分析接口。应用表明,系统数据测量准确、相对误差较低、稳定性较好。展开更多
基于海洋工程平台项目特点,研究物资分类、物资编码和物资批次编码等关键技术,引入批次管理方法。按批次阶段形成亚批次清单(Bill of Lots, BOL),建立物资追溯管理模型,为海洋工程平台项目实现产品全生命周期内的物资追溯管理提供理论...基于海洋工程平台项目特点,研究物资分类、物资编码和物资批次编码等关键技术,引入批次管理方法。按批次阶段形成亚批次清单(Bill of Lots, BOL),建立物资追溯管理模型,为海洋工程平台项目实现产品全生命周期内的物资追溯管理提供理论依据。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
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.
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-
文摘针对目前智能楼宇监测中数据可靠性低、测量点位分散、数据传输实时性不高和误报频繁等问题,提出基于物联网(Internet of Things,IoT)技术的智能楼宇监测系统设计。首先,采用ZigBee技术组建无线传感器网络,实现分散点位传感器数据的收集,并将数据通过网关传输到物联网云平台。其次,利用改进的自适应加权算法融合传感器数据,有效提升多传感器检测数据的准确性。系统云平台能够分析和展示传感器数据,而且能够实时查看待测区域的视频图像,预留数据分析接口。应用表明,系统数据测量准确、相对误差较低、稳定性较好。
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.
