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Simulation study on improvement of air quality by introducing electric vehicles

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International Journal of Modeling, Simulation, and Scientific Computing 2015年第4期6卷 153-163页

作者： yiman du Jianping Wu Kezhen Hu Yue Guo Department of Civil Engineering Tsinghua University Beijing 100084P.R.China†Nissan(China)investment Co.LTD Beijing100020P.R.China

Recently,Chinese megacities have suffered serious air *** studies have pointed out that transportation systems have become one of the major sources of air pollution and on-road pollutant concentrations are significantly higher than *** vehicle(EV)introduction is proposed as a method to alleviate the current *** order to better understand the benefit of the use of EVs in Beijing,a simulation platform has been developed to evaluate the improvement of air quality with the use of EVs quantitatively within the selected *** scenarios with different EV penetration rates are proposed and the results revealed 5%,10%,15%EV penetration rates which will bring about improvement of 0.86%,9.01%and 12.23%for PM2.5,0.92%,9.01%and 13.32%for nitrogen oxides(NO_(x)),0.95%,8.86%and 13.73%for CO,*** results revealed a promising improvement of air quality with the introduction of EVs.

关键词： Electric vehicle PM2.5 traffic simulation air quality

Urban air quality, meteorology and traffic linkages: Evidence from a sixteen-day particulate matter pollution event in December 2015, Beijing

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Journal of Environmental Sciences 2017年第9期29卷 30-38页

作者： Dongmei Hu Jianping Wu Kun Tian Lyuchao Liao Ming Xu yiman du Department of Civil Engineering Tsinghua University Fujian Key Laboratory for Automotive Electronics and Electric Drive Fujian University of Technology

A heavy 16-day pollution episode occurred in Beijing from December 19, 2015 to January 3,2016. The mean daily AQI and PM2.5 were 240.44 and 203.6 μg/m^3. We analyzed the spatiotemporal characteristics of air pollutants, meteorology and road space speed during this period, then extended to reveal the combined effects of traffic restrictions and meteorology on urban air quality with observational data and a multivariate mutual information model. Results of spatiotemporal analysis showed that five pollution stages were identified with remarkable variation patterns based on evolution of PM2.5 concentration and weather conditions. Southern sites（DX, YDM and DS） experienced heavier pollution than northern ones（DL, CP and WL）. Stage P2 exhibited combined functions of meteorology and traffic restrictions which were delayed peak-clipping effects on *** information values of Air quality–Traffic–Meteorology（ATM–MI） revealed that additive functions of traffic restrictions, suitable relative humidity and temperature were more effective on the removal of fine particles and CO than NO2.

关键词： Pollution event Air quality Meteorology Traffic restrictions Mutual information

The Simulation Study of the Internet of Things(IOT)technology based on Modern Logistic Distribution Synergy

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The Simulation Study of the Internet of Things(IOT)technolog...

Nonlinear dynamic characteristic analysis of speech for Chinese

2014第九届中国智能交通年会

作者： ZHOU Yang Jianping WU yiman du Institute of Transportation Engineering School of Civil EngineeringTsinghua University

This paper demonstrated that information synergy can significantly improve the efficiency of distribution system。In this information synergy system,IOT technology has been applied。A simulation study has shown that with the synergy of real-time traffic information,customers can trace cargo information,logistics enterprise can real-time optimize distribution path,traffic management department can real-time monitor vehicle movements。The implications of the research are to enhance the modern logistics system efficiency and improve the distribution service level。The IOT technology is the best method which enhanced the integration of city logistics and transportation information。

关键词： Simulation Internet of things Logistic Distribution Synergy

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Chinese Journal of Acoustics 2000年第3期19卷 230-239页

作者： HU Shuiqing ZHANG Yu HUA yiman du Gonghuan (Institute of Acoustics & State Key Lab of Modern Acoustics, Naning University Nanjing 210093)

Nonlinear dynamic method is used in studying Chinese spoken in normal speed, and the improved correlation dimension algorithm are made for the characterization of speech signal. The reconstructed phase space and correlation dimension curves of unvoiced fricative consonants and vowels are also given. It is found that the correlation dimension algorithm can distinguish fricative from vowel because of the different mechanism between them. And the study shows that it can provide information for distinguishing four basic tones in mandarin.

关键词： Am Nonlinear dynamic characteristic analysis of speech for Chinese

Fluorinated poly(p-triphenylene isatin) anion exchange membranes based on hydrophilic hydroxyl side chain modulation for fuel cells

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Journal of Energy Chemistry 2025年第1期100卷 702-709页

作者： yiman Gu Yanchao Zhang Zhanyu Li Yijia Lei Baozeng Sun Xiaoyu Yu Zhe Wang College of Chemistry and Life Science Changchun University of Technology College of Chemical Engineering Changchun University of Technology School of Materials Science and Engineering Changchun University of Technology Key Laboratory of Advanced Functional Polymer Membrane Materials of Jilin Province

The development of alkaline fuel cells is moving forward at an accelerated pace,and the application of ether-free bonded polymers to anion exchange membranes （AEMs） has been widely ***,the question of the“trade-off”between AEM ionic conductivity and dimensional stability remains *** strategy of inducing microphase separation to improve the performance of AEM has attracted much attention recently,but the design of optimal molecular structures is still being ***,this work introduced different ratios of 3-bromo-1,1,1-trifluoroacetone （x=40,50,and 60） into the main chain of poly（p-terphenylene isatin）.Because fluorinated groups have excellent hydrophobicity,hydrophilic hydroxyl-containing side chains are introduced to jointly adjust the formation of phase separation *** results show that PTI-PTF50-NOH AEM with the appropriate fluorinated group ratio has the best ionic conductivity and alkali stability under the combined effect of *** has an ionic conductivity of 133.83 mS cm-1at 80°*** addition,the OH-conductivity remains at 89%of the initial value at 80°C and 3 M KOH for 1056 h of *** cell polarization curve based on PTI-PTF50-NOH shows a power density of 734.76 mW cm-2at a current density of 1807.7 mA cm-2.

关键词： Anion exchange membranes Poly(p-terphenylene isatin) Hydrophilic-hydrophobic phase separation Fluorinated group

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快速城镇化背景下的驾驶风格多样性分析

清华大学学报（自然科学版） 2016年第12期56卷 1320-1326页

作者：奇格奇吴建平杜怡曼贾宇涵清华大学土木工程系北京100084

快速城镇化造成的交通拥堵、交通安全、交通环境等问题日益突出,从交通参与者个体的特性出发,分析驾驶风格多样性,从而建立"以人为本"的智能交通系统,是充分开发利用现有道路交通资源的有效途径。然而,驾驶风格难以检测和量化,这导致个... 详细信息

快速城镇化造成的交通拥堵、交通安全、交通环境等问题日益突出,从交通参与者个体的特性出发,分析驾驶风格多样性,从而建立"以人为本"的智能交通系统,是充分开发利用现有道路交通资源的有效途径。然而,驾驶风格难以检测和量化,这导致个体特征与系统性的计算难以进一步融合。该文通过实验车采集了16位驾驶员在实际道路上的驾驶行为数据,利用主题模型挖掘驾驶行为中的隐含主题,将数据结构由"驾驶风格—驾驶行为数据"转化为"驾驶风格—驾驶状态—驾驶行为数据"结构,发现了驾驶风格结构化信息,能够为建立更为有效的智能交通系统提供科学依据与理论支持。通过分析相关性,证实了模型重构数据与原数据有较好的一致性,验证了模型进行驾驶风格多样性分析的可行性。

关键词：城镇化驾驶风格主题模型智能交通驾驶行为

在党史学习教育中汲取打造世界领先企业的强大动力

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石油化工管理干部学院学报 2021年第3期23卷 20-24页

作者：杜毅漫中国石化出版社企业文化与教育出版分社北京100011

深入学习贯彻习近平总书记在党史学习教育动员大会上的重要讲话精神,努力从党走过的风云激荡的历史中、从党开创和不断推进的伟大事业中、从党全心全意为人民服务的根本宗旨和长期实践中,扎实有效开展党史学习教育,深化对党的信赖,坚定... 详细信息

深入学习贯彻习近平总书记在党史学习教育动员大会上的重要讲话精神,努力从党走过的风云激荡的历史中、从党开创和不断推进的伟大事业中、从党全心全意为人民服务的根本宗旨和长期实践中,扎实有效开展党史学习教育,深化对党的信赖,坚定对党的领导的信念,赓续共产党人精神血脉。要通过学习党史、新中国史、改革开放史和社会主义发展史,提高责任意识,发挥示范作用,树立正确的党史观,创新学习方式方法,鼓起迈进新征程、奋进新时代的精气神,奋力开拓打造世界领先洁净能源化工公司新局面。

关键词：党史学习教育传承红色基因打造世界领先企业石油精神

外卖小哥从业状况的调查与分析——基于攀枝花市在线餐饮行业的数据

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青年发展论坛 2019年第5期29卷 77-85页

作者：杜宜蔓四川省团校

外卖小哥这一新兴职业群体,伴随着电子商务的快速发展而逐渐兴起,近年来受到社会大众的广泛关注。本文以攀枝花市外卖小哥为研究对象,通过问卷调查、座谈会以及深度访谈等形式收集了外卖小哥从业状况相关信息。调查表明,当前,外卖小哥... 详细信息

外卖小哥这一新兴职业群体,伴随着电子商务的快速发展而逐渐兴起,近年来受到社会大众的广泛关注。本文以攀枝花市外卖小哥为研究对象,通过问卷调查、座谈会以及深度访谈等形式收集了外卖小哥从业状况相关信息。调查表明,当前,外卖小哥面临着职业发展不可持续、生活方式重复单调、社会角色边缘化等困境。为此,文章提出可以从完善机制体系建设、建立行业发展规范,推进企业文化建设、加强职业技能培训,合理规划职业生涯、充分挖掘自身潜能三个层面入手,积极助推新兴职业青年群体成长发展。

关键词：新兴职业餐饮行业从业状况电子商务企业文化建设青年群体机制体系小哥

FLOWSIM在深圳交通管理与评价中的应用研究(英文)

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系统仿真学报 2015年第8期27卷 1881-1887页

作者：贾宇涵吴建平杜怡曼奇格奇清华大学土木工程系北京100084

近年来我国城市交通问题愈发严重,传统的交通解决方法已经无法解决目前的城市交通困境,因此很多新型的交通需求管理方法呼之欲出。交通仿真软件等一些智能交通系统的应用也能够解决很多交通管理与评价难题。以深圳为例,研究了大城市实... 详细信息

近年来我国城市交通问题愈发严重,传统的交通解决方法已经无法解决目前的城市交通困境,因此很多新型的交通需求管理方法呼之欲出。交通仿真软件等一些智能交通系统的应用也能够解决很多交通管理与评价难题。以深圳为例,研究了大城市实施拥堵收费的可能性。针对收费后可能出现的情况,采用微观交通仿真软件FLOWSIM,进行了拥堵收费的仿真模拟和效果评价,提出了一些有价值的建议。研究表明:交通仿真软件FLOWSIM为大城市应用TDM解决交通问题的相关研究提供了新思路和新方法。

关键词：交通仿真 FLOWSIM仿真软件交通管理与评价交通拥堵收费