城市地铁的轨道结构选型与设计要点

当前,我国各大城市都在加快地铁等轨道交通的建设,但是地铁的轨道结构相关研究仍不够完善。本文以轨道结构的钢轨、扣件、轨枕、道床等组成构件为研究对象,对其选型与设计进行了分析。以深圳地铁九号线为例,对轨道结构选型与设计进行了案例分析。本文的研究成果可为地铁轨道等相关工程技术人员提供参考。     

低压配电柜在沈阳地铁二号线上的应用

目前轨道交通发展越来越迅速,地铁2号线作为贯穿南北的重要地铁线路,有着举足轻重的地位。目前地铁2号线已投入运行,针对地铁2号线低压配电系统在试运行阶段的逻辑关系进行介绍总结,希望能够为以后设计中更加的完善逻辑功能。本文着重举例介绍开关柜的简介及低压配电系统中的进线,母联及三级负荷柜如何在地铁配电中实现手动控制和自动控制。     

沈阳北站主体围护结构设计

本文以沈阳地铁2号线沈阳北站站基坑围护设计方案为例,通过理论分析与计算,得出在沈阳地区采用明挖法修建地铁时,只要设计参数得当,采用钻孔灌注桩与钢管支撑联合作用的围护结构型式是比较经济且可行的结论。     

繁华商业区车站基坑支护结构受力分析

文章以郑州地铁1号线三标二七广场站地铁车站施工为工程背景,对车站基坑支护结构受力位移情况进行分析。通过计算,优化了复杂条件下车站基坑支护结构的设计。该支护结构成功地应用于郑州地铁繁华商业车站基坑的施工,确保了支护结构的整体稳定性。     

有限元分析在城轨车辆扶手结构设计中的应用

文章以广州地铁6号线车辆铝合金扶手结构设计为例,介绍了有限元分析作为一种辅助设计手段,在城轨车辆扶手结构设计中的应用情况,提出利用有限元分析可以缩短设计-验证周期,提高设计效率。     

西安地铁起步价2元全程不超5元

8月21日,陕西省委常委、西安市委书记孙清云,分三段全程体验了即将投入试运营的西安地铁2号线。除了感慨地铁的快和稳,他要求,下一步,要全面提升地铁服务软实力,在45分钟车程中,给每一位乘客留下美好印象。     

深圳地铁7号线结构防水设计与施工研究

通过介绍深圳地铁7号线的混凝土结构自防水设计、接缝和外包等结构防水设计,得出地铁结构防水设计应以结构自防水为根本,以接缝防水为重点,辅之以外包防水层加强防水的结论,提出了利用混凝土"双掺"技术降低水化热,以自粘防水卷材作为外包防水,以及严格控制施工工艺等建议,对类似地铁结构防水设计具有一定的借鉴作用。     

龙华路站低压配电设计难点解析

龙华路站为南京地铁10号线中的一座地下二层岛式车站,目前已投入运营。文章对龙华路站低压配电工程设计中的难点做了论述,以期为今后地铁低压配电专业的设计起借鉴作用。     

地铁大断面暗挖拱盖法施工技术

本文结合青岛地铁1号线瑞金路地下双层岛式车站工程实例,详尽地论述了地铁拱盖法大断面开挖支护施工技术的特点、适用范围、工艺原理、施工工艺流程及操作要点等内容。该技术施工进度快,防水效果好,质量高,安全可靠。     

风化岩石地层条件下地铁竖井施工关键技术研究

随着我国地铁的修建的高速发展,地铁施工技术得到了不断发展和提高,极其复杂的施工条件为地铁施工技术带来了较大的挑战。针对深圳地铁5号线(环中线)工程长岭陂站至深圳北站区间竖井风化岩石地层复杂条件施工难度大的特点,详细介绍了地铁区间竖井止水帷幕施工、竖井开挖支护、马头门施工及信息化施工关键技术,为地铁类似工程施工与设计提供借鉴。     

Development in Information and Communications Technology (ICT) Statistics at the Australian Bureau of Statistics

This paper outlines the ICT statistical developments that the ABS has undertaken over recent years. These developments have been on both the supply side (ICT industry) and the demand side (use of IT by sector). The content of ABS ICT surveys has changed significantly over the last few years and are expected to develop further in line with industry changes and emerging policy needs.
Recent developments in household collections have been the inclusion of IT use questions in the 2001 Census of Population and Housing and in various ABS social surveys such as Children's Participation in Culture and Leisure Activities. Annual business IT use surveys are now conducted and include topics such as Internet commerce and IT security. Biennial ICT industry surveys are conducted to provide data on ICT production, imports and exports, ICT industry employment, performance and structure information. An Internet activity survey is run every six months and provides regional Internet access details and infrastructure details on Internet service providers.
A major development for 2002–03 will be the compilation of an ICT satellite account. ABS intends to produce an ICT Information Development Plan to guide its future statistical development work in the ICT field.     

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.     

Incumplimiento del salario mínimo en Europa central y oriental

En este estudio se analiza el incumplimiento del salario mínimo durante el periodo 2003–2012 en diez países de Europa central y oriental con salario mínimo obligatorio nacional. A partir de los datos de EU‐SILC y la metodología propuesta por Bhorat, Kanbur y Mayet (2013), se cuantifica la incidencia y magnitud del incumplimiento. Se realizan análisis de regresión sobre determinantes individuales, laborales y macroeconómicos. Aunque la incidencia permanece relativamente baja, los trabajadores a los que se dirigen las políticas de salario mínimo parecen los más expuestos a su incumplimiento. Con el tiempo, una mayor incidencia se asocia a una razón más alta entre salario mínimo y salario medio.     

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.     

Cultural Economy Planning in Creative Cities: Discourse and Practice

While a growing body of research analyses the functional mechanisms of the cultural or creative economy, there has been little attention devoted to understanding how local governments translate this work into policy. Moreover, research in this vein focuses predominately on Richard Florida's creative class thesis rather than considering the wider body of work that may influence policy. This article seeks to develop a deeper understanding of how municipalities conceptualize and plan for the cultural economy through the lens of two cities held up as model ‘creative cities’ — Austin, Texas and Toronto, Ontario. The work pays particular attention to how the cities adopt and adapt leading theories, strategies and discourses of the cultural economy. While policy documents indicate that the cities embrace the creative city model, in practice agencies tend to adapt conventional economic development strategies for cultural economy activity and appropriate the language of the creative city for multiple purposes.     

Input/output ranges and performance: an examination of US machine tool producers

Despite the establishment of high-tech multinational enterprises (MNEs) in Ireland since the late 1950s, the country did not succeed in closing the technological gap with most of its EU counterparts. The weak National System of Innovation (NSI), and in particular low business and government R&D levels, combined with a lack of research and technology linkages between MNEs and indigenous firms, explain these poor results. However, the Shannon region in the West of the country presents some specific institutional characteristics that could theoretically make the region a strong technological enclave. The various actors in the region - i.e. the administrative, financial, political and research institutions, as well as the business organizations - have indeed infused a new type of economic development. After a brief review of the available concepts and models articulated around these actors and their interrelationships, the paper analyses whether the Shannon region, taken as an illustrative example, mirrors a specific economic and technological localized setting. The study is based on a survey of indigenous and foreign firms.     

Sixty years of discrimination and diversity research in human resource management: A review with suggestions for future research directions

This article reviews discrimination and diversity research published in Human Resource Management (HRM) over the past 60 years. While discrimination and diversity are very different constructs, it is often informative to study them together, because when people recognize each other's diversity, this can result in bias, stereotyping, and discrimination. We conducted bibliographic searches for terms related to discrimination and diversity as well as a manual search through every title and abstract published in HRM over the last 60 years to assess article relevance. The search resulted in 135 research articles with 136 unique studies (i.e., samples) which are reviewed in this article. Sex and race are the demographics that have been examined the most in HRM, while religion has been examined the least. Moreover, the number of studies examining lesbian, gay, bisexual, transgender, and queer (LGBTQ) employees in the workplace in HRM has grown quickly within the past 10 years, culminating in a recent meta‐analysis. Our review looks at some of the earliest research published, the most recent research published, and the overall trends we identified in the research over the years for both discrimination and diversity articles. We then make future research suggestions and recommendations to advance the study of discrimination and diversity in the coming years.     

Multinomial distributions applied to random sampling of particulate materials

When sampling a batch consisting of particulate material, the distribution of a sample estimator can be characterized using knowledge about the sample drawing process. With Bernoulli sampling, the number of particles in the sample is binomially distributed. Because this is rarely realized in practice, we propose a sampling design in which the possible samples have a nearly equal mass. Expected values and variances of the sample estimator are calculated. It is shown that the sample estimator becomes identical to the Horvitz–Thompson estimator in the case of a large batch-to-sample mass ratio and a large sample mass. Simulations and experiments were performed to test the theory. Simulations confirm that the round-off error due to the discrete nature of particles is negligible for large sample sizes. Sampling experiments were carried out with a mixture of PolyPropylene (PP) and PolyTetraFluorEthylene (PTFE) spheres suspended in a viscous medium. The measured and theoretical variations are in good agreement.