公路网智能化交通安全管理系统研究

道路交通安全问题已经成为一个世界性问题，分步实施交通安全管理的信息化工程，建立并不断完善计算机安全管理系统，是提高交通安全管理的关键手段之一。建立了公路网智能化交通安全管理系统，分析了该系统的总体框架、系统主要功能，对于交通安全管理的分析及预测可以起到辅助决策和支持的作用。     

浅谈GIS在道路交通中的运用

GIS系统是有效提高城市道路交通安全管理的水平,减少事故的发生,使事故对道路通行的影响最小化,并有效合理分配交通流的重要手段。针对道路交通安全的现况,分析利用地理信息系统(GIS)建立道路安全管理系统的必要性和可行性。GIS的建立为交管部门制定安全对策提供了依据,它提高了我国道路交通安全管理的水平,对有效预防交通事故的发生具有积极意义。     

基于BP 神经网络的城市道路交通安全评价研究

针对我国城市道路交通安全的现状节,并结合我国道路交通的特点, 提出了采用道路交通安全政策、道路交通安全状况、道路交通安全管理与道路交通事故防控水平等4个方面共13项指标组成的面向城市交通安全可持续发展的评价指标集,建立了基于BP 神经网络的评价模型,并结合实例,分析了其计算方法.该方法对于城市交通安全评价是有效的.     

道路交通安全系统透析

从系统角度探讨道路交通安全问题,对系统的运行机理进行了分析,提出了道路交通安全的5要素理论,明确了交通安全管理的功能结构;引入系统工程学的相关概念,如有向图、邻接矩阵和线性规划模型等,对系统要素间的耦合逻辑及系统目标等进行了深入研究;结合热力学熵的概念,探讨了道路交通系统的稳定特性。结果表明:道路交通系统是由交通参与者、车辆、道路、环境以及安全管理等要素组成的动态性开放系统,其安全性取决于系统内单一要素安全水平以及多因素间的耦合品质;交通安全管理是道路交通系统的核心要素,决定了系统的运行规则及运行品质;必须不断向系统输入负熵流(安全管理措施和技术手段),使系统处于动态稳定状态。     

国外交通安全管理各有绝招

阅读提示:交通安全管理是一个系统工程,为进一步降低交通事故率,世界各国都在探索建立可以大范围、全方位发挥作用的交通综合管理系统,提高道路的利用效率,确保道路交通安全,最终达到人、车、路的和谐统一。     

道路交通安全综合评价体系评价指标的筛选与确定

分析道路交通安全综合评价指标体系的作用和建立原则,提出以完善道路交通安全政策与机制、科学分析道路交通安全状况与趋势、强化道路交通安全监督与管理、全面提高道路交通事故分析与防控水平为准则的道路交通安全综合评价指标体系总体架构和19项具体评价指标,并界定了评价指标的含义和评价的具体内容,最后简单介绍了地区交通安全综合评价的方法。     

遏制严重交通违规行为需要强化法制和完善基础设施

交通安全管理是道路交通安全畅通的最直接保障,高质量的交通安全管理才能保证交通畅通、安全、文明、有序。我国的交通安全管理已经取得了很好的成绩,但是,事故的损失绝对值仍然较大。本文采用事故统计分析方法研究了交通安全管理急需解决的突出问题,强调了提高交通安全管理的质量,一方面必须完善道路交通安全法律     

基于TWW函数的道路交通安全灰色评价方法研究

在研究国内外道路交通安全评价方法的基础上，根据我国道路交通安全现状及道路交通安全监督管理的要求，将灰色系统理论应用于道路交通安全评价，建立了一套基于TWW函数的道路交通安全灰色评价指标体系，并对6省市的交通安全水平进行了比较研究。     

城市道路交通安全管理决策支持系统

针对城市道路交通安全管理的流程、模式及特点,结合决策支持系统的理论和方法,采用决策支持四库模式,对道路交通安全信息进行采集、管理、分析、决策和反馈.按照管理决策支持系统建立的一般过程,对系统的功能和构成进行研究,确定系统组成和构建方法.该系统包括7个子系统,分别是道路交通安全综合信息管理子系统、事故成因分析子系统、事故预测子系统、道路交通事件管理及预警子系统、安全评价子系统、安全对策子系统和经济分析及决策子系统.并对数据的管理和实现、模型的实现以及人机界面等方面进行设计,结合程序开发流程,进行了实例应用研究.     

PowerBuilder在道路交通事故统计分析中的应用

应用Microsoft SQL Server建立道路交通事故数据库,并以PowerBuilder软件为平台。建立交通事故统计分析系统,不仅方便了事故数据的管理,而且为制定和完善道路交通安全管理条例,提高交通安全管理水平提供了有效的管理手段和技术支持。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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