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Applying the maximum information principle to cell transmission model of traffic flow

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Journal of Hydrodynamics 2013年第5期25卷 725-730页

作者：刘喜敏卢守峰 Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Traffic and Transportation Engineering College and Key Laboratory of Road Structure and Material of Commu- nication ministry Changsha University of Science and Technology Traffic and Transportation Engineering College Changsha University of Science and Technology

This paper integrates the maximum information principle with the Cell Transmission Model （CTM） to formulate the velocity distribution evolution of vehicle traffic flow. The proposed discrete traffic kinetic model uses the cell transmission model to calculate the macroscopic variables of the vehicle transmission, and the maximum information principle to examine the velocity distribution in each cell. The velocity distribution based on maximum information principle is solved by the Lagrange multiplier method. The advantage of the proposed model is that it can simultaneously calculate the hydrodynamic variables and velocity distribution at the cell level. An example shows how the proposed model works. The proposed model is a hybrid traffic simulation model, which can be used to understand the self-organization phenomena in traffic flows and predict the traffic evolution.

关键词： kinetic traffic model Cell Transmission Model (CTM) maximum information principle traffic flow velocity distribution

Cyclic Group Action of Composite Order on Indefinite 4-manifolds

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Communications in Mathematical Research 2011年第3期27卷 200-206页

作者： LI HONG-xiA liu xi-min Department of Applied Mathematics Shanghai Maritime University Shanghai 201306 Department of Mathematics South China University of Technology Guangzhou 510641

In this paper, we study the possibilities for several kinds of topological, locally linear cyclic group actions of non-prime order on some closed, simply connected 4-manifolds with indefinite intersection form. Especi... 详细信息

关键词： periodic map 4-manifold indefinite permutation representation

Bounded 3-manifolds with Distance n Heegaard Splittings

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Communications in Mathematical Research 2014年第3期30卷 193-200页

作者： ZOU YAN-QING liu xi-min Lei Feng-chun School of Mathematical Sciences Dalian University of Technology

We prove that for any integer n≥2 and g ≥ 2, there are bounded 3-manifolds admitting distance n, genus g Heegaard splittings with any given bound-aries.

关键词： attaching compression body Heegaard distance subsurface projection

Branched Coverings and Embedded Surfaces in Four-manifolds

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Communications in Mathematical Research 2013年第4期29卷 370-376页

作者： liu xi-min Wu Yu-lai Lei Feng-chun School of Mathematical Sciences Dalian University of Technology

In this paper, we get a lower bound on the genera of surfaces re, presenting certain divisible classes in some 4-manifold X with Hi（X; Z） finite.

关键词： embedded surface 4-manifold genus

Principal Chemical Properties of Artificial Soil Composed of Fly Ash and Furfural Residue

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Pedosphere 2006年第5期16卷 668-672页

作者： FENG Yong-Jun LI Fen WANG xiao-Ling liu xi-min ZHANG Lei-Na College of Resources and Environment Shandong Agricultural University Tai＇an 271018 （China） Institute of Geographical Sciences and Nature Resources Research Beijing 100101 （China）

To solve soil shortage in reclaiming subsided land of coal mines, the principal chemical properties of artificial soil formed by mixing organic furfural residue and inorganic fly ash were examined. The results indicated that the artificial soil was suitable for agriculture use after irrigation and desalination, the available nutrients in the artificial soil could satisfy the growth demand of plants, and the pH tended to the neutrality.

关键词： artificial soil chemical properties fly ash furfural residue

Applications of IoT in Smart Grid

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Electricity 2012年第2期23卷 15-19页

作者： Chen xi liu min Li xiangzhen liu Jianming Zhen Yan State Grid Information & Telecommunication Co. Ltd.

In this paper,the basic requirements of the smart grid in China are *** applying Internet of Things(IoT) technologies,various intelligent services can be *** development of the smart grid would rely heavily on the application of *** three-layer architecture of IoT for the smart grid in China is *** information and communication technologies of IoT applied to smart grid are ***,several typical IoT application solutions such as power transmission line monitoring,smart patrol,smart home and electric vehicle management,are provided.

关键词： Internet of Things smart grid information and communication technology WSN RFID

Platoon dispersion prediction under the condition of adjacent cycle traffic flow overlapping based on Support Vector Regression

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通讯和计算机（中英文版） 2008年第5期5卷 12-15,20页

作者： LU Shou-feng liu xi-min DAI Shi-qiang Traffic and Transportation Engineering College Changsha University of Science ＆ Technology Changsha 410076 China Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai 200436 China

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维普期刊数据库

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余辛流形的半不变子流形的Ricci曲率

Journal of Mathematical Research and Exposition 2007年第1期27卷 195-200页

作者：王爱齐刘西民大连交通大学数理系辽宁大连116028 大连理工大学应用数学系辽宁大连116024

本文研究了余辛流形的半不变子流形,得到了这类子流形的Ricci曲率与平均曲率平方之间的—个不等式,并讨论了等式成立的充分必要条件．

关键词：余辛流形半不变子流形 Ricci曲率平均曲率

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引入期望速度的交通流中观模型研究

交通运输系统工程与信息 2013年第2期13卷 81-89页

作者：卢守峰刘改红刘喜敏长沙理工大学交通运输工程学院长沙410114 长沙理工大学道路结构与材料交通行业重点实验室长沙410114

本文旨在研究期望速度对速度—密度曲线的影响.通过引入期望速度建立了新的博弈表和相应的交通流中观模型,利用VBA和Matlab混合编程技术开发了相应的计算程序.对于一个期望速度类情况,分析了期望速度相同时不同的道路条件对应的速度—... 详细信息

本文旨在研究期望速度对速度—密度曲线的影响.通过引入期望速度建立了新的博弈表和相应的交通流中观模型,利用VBA和Matlab混合编程技术开发了相应的计算程序.对于一个期望速度类情况,分析了期望速度相同时不同的道路条件对应的速度—密度曲线,以及相同道路条件下,不同期望速度对应的速度—密度曲线.对于多个期望速度类的情况,研究了多个期望速度的变异系数对车流平均速度的影响,以及慢车比例对车流平均速度的影响.得出结论,驾驶员的期望速度差异是影响车流平均速度的主要因素之一.当密度较小时,交通流处于个体流模式,此时交通流平均速度主要由期望速度差异决定;当密度较大时,交通流处于集体流模式,此时交通流平均速度主要由密度决定.

关键词：交通工程中观模型博弈表期望速度离散动力学