基于INTEGRATION的城市交通中观仿真建模及实例分析

提出了基于INTEGRATION的城市交通中观仿真建模方法。选取中观仿真模型INTEGRATION为研究对象,提出了INTEGRATION应用于城市交通管理的技术路线;并利用INTEGRATION搭建了奥林匹克公园周边路网交通仿真平台,分析了奥运会高峰日期间实施交通需求控制和铺设专用道策略之后,专用道的运行效率和对周边路网的影响,验证了INTEGRATION在开展城市交通管理方面的应用效果。     

城市路网动态交通模型建模及实例应用

以动态交通运行分析和管理评估为目的,提出城市路网动态交通模型的构建流程,总结四个关键技术问题:动态OD反推、交通流特征参数标定、动态交通分配方式选择和情景参数标定;在此基础上,采用虚拟路网的测试结果直观呈现动态交通模型的主要功能特点;最后,采用INTEGRATION构建北京实际区域路网动态交通模型,评估分析匝道控制方案和事故应对方案的实施效果。     

城市路网动态交通模型建模及实例应用

以动态交通运行分析和管理评估为目的,提出城市路网动态交通模型的构建流程,总结四个关键技术问题:动态OD反推、交通流特征参数标定、动态交通分配方式选择和情景参数标定；在此基础上,采用虚拟路网的测试结果直观呈现动态交通模型的主要功能特点；最后,采用INTEGRATION构建北京实际区域路网动态交通模型,评估分析匝道控制方案和事故应对方案的实施效果.     

Vissim交通仿真软件在地铁施工交通影响分析中的应用

地铁施工对周边交通产生了极大的影响,以广州6号线长湴地铁站为例,在交通流量数据调查的基础上,利用Vissim交通仿真软件建模交通仿真模型,分析地铁施工对周边交通影响的情况,提出缓解交通拥堵的改善方案,并为后续地铁施工制定交通组织方案提供参考。仿真结果表明:改善方案使得长湴地铁站周边交通的车辆延误时间降低18.7%,停车次数降低26.2%,行程时间减少4.8%。     

基于多层体系结构的交通系统多分辨率仿真架构研究

基于多分辨率建模理论及数值仿真技术,研究了交通多分辨率仿真的必要性及可行性,在此基础上提出了交通多分辨率仿真的理论架构和实现框架,并通过C++实现了该仿真系统,为进一步的模型实现、校验及应用奠定了坚实的基础。     

道路交通的元胞自动机模型及其分析

应用元胞自动机理论构造道路交通仿真模型,并根据道路交通的元胞自动机模型分析了交通需求变化、随机减速规则和驾驶者习惯对道路交通系统的影响.交通需求越大,道路出现堵塞的可能性就越大,这种堵塞主要是由于系统的随机减速引起的,暗示了交通系统的复杂性来源于大量个体参与者的随机行为;随机概率越大可以导致整个交通系统的平均速度的降低;驾驶者习惯对交通系统运行也有很大的影响.     

基于MATLAB/Simulink的7.5kW三相潜水泵的仿真分析与实现

首先给出潜水泵系统的数学模型,然后采用MATLAB/Simulink建立系统的仿真模型并进行仿真实现,最后给出相应的仿真结果和分析。本文的仿真方法克服了传统编程语言仿真时繁杂、难度高、周期长的缺点,使动态系统的仿真变得容易、直观、迅捷。     

汽车涂装生产线三维仿真技术的研究和应用

首先分析汽车涂装生产线的工艺,总结涂装生产线在仿真模型中的系统分析和构建。以典型工艺为例阐述运用AutoMod对涂装线仿真时,建立仿真模型的流程和关键技术。最后运用模型实现涂装生产线的布局设计和生产过程的动态仿真,并依据仿真结果确定生产线的技术参数。     

掘进机负载敏感泵AMESim建模与仿真研究

负载敏感泵为掘进机提供动力,其主要由敏感阀、柱塞缸、换向阀等组成,文章根据分析过程建立数学模型及动态方程,并建立AMESim仿真模型,得出动态仿真结果。     

杂货码头物流系统仿真模型研究

基于离散事件的动态系统理论,文中建立了杂货码头物流作业流程的仿真模型。最后,借助Witness仿真平台建立了杂货码头物流系统仿真模型。该模型主要用来分析杂货码头的机械调度模式、装卸工艺、生产作业能力、设备优化配置以及其它作业工况。     

Value at Risk in the Suburbs: Eminent Domain and the Geographical Politics of the US Foreclosure Crisis

Several US counties and local governments have recently considered a novel solution to the foreclosure crisis. They plan to use eminent domain to compel the owners of mortgage debt—and specifically of private‐label mortgage‐backed securities—to sell the debt to the government at a price reflecting the loan's market value. The government would then restructure the debt and resell it to new investors. The plans are striking because—in contrast to both development‐driven eminent domain and the federal subprime bank bailout—they would force investors to assume asset devaluation and increased long‐term risk. Notably, the plans have emerged as an instance of financialization‐focused politics in suburbs and suburban cities of color, specifically majority‐black and ‐Latino/a suburbs. Local support for the plans, we argue, is rooted in the long‐term disinvestment of these ‘suburbs of exception', which became targets of subprime lending and eventually sites where the ‘financial exception' has been localized. But these demographic shifts, fragmentation and fiscal pressures have at the same time created a suburban political terrain in which the plans have gained their strongest political support.     

Towards a Theory of Serendipity: A Systematic Review and Conceptualization

Serendipity – the notion of making surprising and valuable discoveries – plays a major role in the success of individuals and organizations alike. Previous research has established the importance of serendipity and identified important individual- and organizational-level antecedents. However, the literature has been dispersed and the boundaries of the concept have been blurry, leading to a lack of conceptual clarity and structure, and thus limiting validity and managerial actionability. Based on a systematic literature review, I synthesize existing management-related research on serendipity and explicate the emergence and composition of serendipity in the organizational context. I first identify three necessary conditions that differentiate serendipity from related concepts such as luck or targeted innovation: agency, surprise, and value. Then, I draw from the literature on sensemaking, event-based theorizing, and quantum-based approaches to management to conceptualize the process of cultivating serendipity in the organizational context as a process of enabling potentiality and materialization, and develop a multi-level theory of (cultivating) serendipity. This conceptualization contributes to our collective understanding of how, why, and when (i.e., under what conditions) organizations can leverage the value in the unexpected, which opens up fruitful avenues for further research.     

Accountability of NGOs in Bangladesh A critical overview

NGOs in Bangladesh have been recognized as effective change agents in the socio-economic arena throughout the world. Their contributions in micro credit, non-formal education and primary health care are widely known. NGOs play a significant role in society. NGO accountability, as a result, has become a critical issue. NGO accountability in Bangladesh has been examined here in relation to patrons, clients and themselves. Of the three relationships only accountability to patrons is in a near satisfactory state. Accountability to clients is handicapped by lack of opportunities of beneficiaries to participate meaningfully in NGO policy making. Accountability to themselves is adversely affected due to the adherence to a strictly hierarchical system and the influence of founding and charismatic NGO leaders.     

Towards an Asian model of human resource management? A comparative analysis of China,Japan and South Korea

There has been much discussion regarding the possible decline and weakening of national systems of human resource management (HRM). Yet, culture and institutions are often cited as the major stumbling blocks to this outcome. Such constraints may dissipate in the analysis, particularly if ‘regional clusters’ are considered where geographic and cultural closeness and ‘openness’ to similar economic pressures exist. In such cases, it might be postulated that convergence in HRM will occur. We argue that China, Japan and South Korea represent such a cluster. This article examines these countries, to see if a degree of convergence is taking place and if it is towards an identifiable ‘Asian’ model of HRM. A model of change is presented that distinguishes between levels of occurrence and acceptance. Details of the development and practice of HRM in each country are then set out. The article ends with a discussion and implications section and a brief conclusion.     

The Creation of the Office for National Statistics

A new Office for National Statistics was created in the United Kingdom in 1996 following a series of developments designed to strengthen the relevance and integrity of statistics. This paper describes these fundamental changes and sets out a blueprint for future progress. It also sets current developments in the United Kingdom in an historical and international context.     

What helps? Women engineers' accounts of staying on

We have considerable understanding of the obstacles that women engineers encounter and the reasons that they leave the field, but we know less about what enables them to remain. Adopting an interpretivist approach, this article examines how a group of British women engineers in two FTSE 100 companies account for “staying on” in their male‐dominated work settings. We delineate four specific forms of help that facilitate women's retention in the field. We argue that exposure to help leads to women developing a habitus that enables them to continue working in engineering. To conclude, we draw on our findings to outline HR practices that will facilitate supportive relationships in the workplace and pave the way towards developing more positive organisational climates.     

论现代物流企业的发展观

物流业经过诸多年的发展目前已经成为最热门的行业之一,物流企业的注册数量也与日俱增,达到前所未有的规模。毋庸置疑,任何企业都希望自己迅速做强做大,并成为真正现代物流企业的典型代表,要实现这一目标一个首要问题就是要解决现代物流企业的发展观问题。     

浅谈大体积混凝土裂缝的控制

大体积混凝土的裂缝问题是实际工程中长期困扰工程技术人员的问题,其控制技术的研究是混凝土结构研究的热点问题,具有重大的学术价值和潜伏的工程背景。     

Supply Chain Strategies in the UK Fashion Industry—The Rhetoric of Partnership and Realities of Power

This paper focuses on the fashion industry, one characterised by issues such as dramatic shifts in the scale and power of major retail buyers in the market, the advent of retailer own brands, and the nature of sourcing and supply chain decisions, issues that are increasingly global in nature. The aim of this research is to explore the nature of relationships between UK high street multiple fashion retailers and their contracted suppliers, many of whom are entrepreneurial firms by most definitions of the term. Four core themes emerge from the literature and provide a framework for the research, namely, power, process, partnership, and people. The research approach was qualitative, and conducted over a period of twelve months. The paper ends with an agenda for future research.