DC-32捣固车作业安全保护系统的设计与运用

随着我国铁路事业的快速发展,铁路线日益增多,采用大型养路机械DC-32捣固车对铁路线的捣固、起拔道大修、维修施工任务越来越多,与小液捣、捣固棒等小型养路机械相比,自动化程度高、作业质量好、效率高。但在作业中,有时会出现因操作失误或控制系统故障,导致自动对中装置失控,捣固作业时碰伤钢轨,甚至造成钢轨重伤或报废,存在行车安全隐患。文章阐述了如何为DC-32型捣固车加装一套作业横移安全保护系统,有效解决DC-32型捣固车自动对中装置在现场运用过程中碰伤钢轨问题,提高大机作业质量,确保大机运用安全。     

浅谈新建玉铁铁路大型养路机械整道施工技术

文章重点介绍新建铁路大型养路机械整道技术控制。大型养路机械整道技术控制即按照道床配碴整形车、抄平起拨道捣固车、动力稳定车的排列顺序组成的配套作业车组进行铁路整道作业。其资源配置合理,形成流水作业。     

D08-32捣固车伺服控制器设计与实现

针对D08-32捣固车拨道电液伺服阀动态特性复杂、非线性和时变等特点,文章在传统PID基础上研究并设计了一种基于神经网络的新型自学习PID伺服控制器,硬件采用DSP芯片作为主处理器,软件采用神经网络PID控制算法,重点介绍了神经网络PID控制器的设计。通过在D08-32捣固车上的装车应用,验证了该算法对改善拨道伺服系统的静态和动态特性具有良好的效果。     

DWL48捣固装置在铁路现场维修中的应急故障与排除

DWL-48型连续走行捣固稳定车可以促使连续式三枕到捣固作业得到实现,相较于传统的捣固车具有更高的作业效率和作业精度,因此得到了较为广泛的应用。但是在具体的实践过程中,捣固装置容易出现故障,需要引起人们足够的重视。要结合出现的故障,及时采取一系列有针对性的措施进行排除,以便更佳的开展铁路现场维修工作。文章简要分析了DWL48捣固装置在铁路现场维修中的应急故障与排除,希望可以提供一些有价值的参考意见。     

DWL48捣固装置在铁路现场维修中的应急故障与排除

DWL-48型连续走行捣固稳定车可以促使连续式三枕到捣固作业得到实现，相较于传统的捣固车具有更高的作业效率和作业精度，因此得到了较为广泛的应用。但是在具体的实践过程中，捣固装置容易出现故障，需要引起人们足够的重视。要结合出现的故障，及时采取一系列有针对性的措施进行排除，以便更佳的开展铁路现场维修工作。文章简要分析了DWL48捣固装置在铁路现场维修中的应急故障与排除，希望可以提供一些有价值的参考意见。     

浅谈铁路养路机械运用管理

文章论述了铁路养路机械运用管理面临的问题,养路机械的运用效率低、操作者的水平和素质低、缺少有效的监管、缺少一定的成本管理和创新铁路养路机械运用管理。提高养路机械运用管理水平的策略,领导增强养路机械运用管理的认知,提高养路机械运用管理者的素质和管理大型化养路机械的作业效能,才能做好养路机械的安全管理。     

铁路工务小型养路机械维修使用管理模式探讨

铁路在我国社会经济发展中扮演重要角色,伴随着铁路事业的快速发展,铁路运输的速度不断提高,对于线路的质量也提出了更高的要求。虽然大型养路机械的出现为铁路线路的维修提供了便利,不过也不能因此忽略小型养路机械的发展。文章结合现阶段铁路小型养路机械设备在使用管理中存在的问题,对其维修使用以及管理工作进行了探讨。     

基于校企合作的《钢轨打磨车》现状分析及资源建设

在技术革新和产业升级的推动下,以钢轨打磨车、捣固车等为主型的大型养路机械,在铁路机械化维修中的运用愈加广泛。文章通过分析现有《钢轨打磨车》存在的问题,提出采用校企合作的模式,通过企业调研、教师企业实践、专家指导等方式,收集资源,构建网络学习平台。对照行业和岗位标准,多方面实施资源建设,使学生培养更加迎合企业需要。     

捣固稳定车捣固装置运动学分析

有砟铁路的维修与维护对于列车的运行安全尤为重要,捣固装置是捣固稳定车的重要组成部分。捣固作业使道砟产生振动趋于稳定的方向移动,提高道砟的密实度。文章简要介绍了捣固装置的结构,着重分析了捣固装置的作业原理,对捣固镐头运动特点进行理论分析。并利用Recur Dyn进行运动学的仿真,进一步分析验证捣固镐头运动特性,为后续的研究提供了基础。     

铁路工务小型养路机械维修使用管理模式的分析

随着经济的快速发展,铁路方面也得到了飞跃的进步,对铁路线路的质量也提出更高的要求。铁路路线的维修不能因为有大型养路机械的加入而忽略小型养路机械的发展,要充分发挥小型养路机械的作用,要建立铁路工务小型养路机械维修的管理模式。文章通过对铁路工务小型养路机械设备管理存在的问题、小型养路机械科学化管理的建设以及重视小型养路机械的安全管理等问题,对各铁路工务段现行的维修管理模式对比,优选最佳维修模式。     

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.     

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.     

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.     

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.     

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.     

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.     

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 Early History of the Cumulants and the Gram-Charlier Series

The early history of the Gram-Charlier series is discussed from three points of view: (1) a generalization of Laplace's central limit theorem, (2) a least squares approximation to a continuous function by means of Chebyshev-Hermite polynomials, (3) a generalization of Gauss's normal distribution to a system of skew distributions. Thiele defined the cumulants in terms of the moments, first by a recursion formula and later by an expansion of the logarithm of the moment generating function. He devised a differential operator which adjusts any cumulant to a desired value. His little known 1899 paper in Danish on the properties of the cumulants is translated into English in the Appendix.