浅谈跨江(河)大桥的测量控制

近年来,大跨度跨江(河)大桥施工越来越多,测量控制是桥梁施工控制中一个相当重要的部分。文章通过对南宁铁路枢纽新南宁邕江四线特大桥跨邕江桥墩的测量控制的分析,重点对跨河测量的平面、高程及变形观测控制进行阐述,以达到提高测量精度的目的。     

跨铁路转体桥转体及测量控制技术研究

跨铁路转体测量控制技术是确保桥梁施工精准度的重要工作,也是跨铁路转体桥施工控制的难点问题。为此,文章结合新建郑万铁路北汝河特大桥上跨孟平铁路转体梁项目施工实际情况,具体分析了施工测量控制技术在跨铁路转体桥中的应用,并对涉及和影响转体等施工精度的关键技术进行了总结,为今后类似转体桥梁施工进一步提供了建设性参考意见。     

浅淡公路特大桥的桥位控制网测量

文章简要介绍了公路特大桥的桥位控制网测量的基本要求及网形的布设方法,并通过实例进行公式推导及平差计算。     

桥梁施工的测量技术与方法探索

为了发展铁路、公路和城市道路等交通运输事业,在江河上修建了大量桥梁。这些桥梁在勘测设计、建筑施工和运营管理期间都需要进行大量测量工作。在桥梁的建筑施工阶段,需要建立桥梁平面控制网和高程控制网,进行桥墩、桥台定位和梁的架设等施工测量,以保证建造的位置准确。     

九架棚大桥预应力混凝土连续刚构测量控制技术

测量控制在连续刚构施工中是施工监测的方法之一,对施工中的线形控制和成桥后的线形起着很大作用,尤其是挠度观测资料是控制成桥线形最主要的依据.结合九架棚大桥测量控制的经验,总结本文,希望能为类似桥梁施工积累经验.     

论高速公路工程测量监理工作的控制

测量监理是工程建设项目监理工作中最重要的工作之一,稍有不慎就会影响工程的质量。文章阐述了测量监理工程师在质量控制、进度控制、投资控制等三大控制的工作内容、要求及具体做法,提出了测量监理人员的工作素质和要求。     

论高速公路工程测量监理工作的控制

测量监理是工程建设项目监理工作中最重要的工作之一,稍有不慎就会影响工程的质量.文章阐述了测量监理工程师在质量控制、进度控制、投资控制等三大控制的工作内容、要求及具体做法,提出了测量监理人员的工作素质和要求.     

桥梁GPS控制网的布设研究

详细阐述了桥梁GPS控制网的布设,网形设计及优化进行分析,GPS高程拟合原理与方法的探讨,提出桥梁施工控制网网形和施测方案,以保证桥与线路连接的整体性,同时满足定位测量、施工放样的需要。     

大跨度连续梁桥施工控制的若干问题

文章结合桥梁施工控制需要,探讨了大跨度连续梁桥施工控制的理论方法及监控工作流程,为连续梁施工控制提供一些经验,保证工程的顺利进行。     

大跨度连续梁桥施工控制的若干问题

文章结合桥梁施工控制需要,探讨了大跨度连续梁桥施工控制的理论方法及监控工作流程,为连续梁施工控制提供一些经验,保证工程的顺利进行。     

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.     

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.     

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.     

Capturing the Implications of Services Trade Liberalization

This paper evaluates the impact of service sector trade liberalization on the world economy by a ten-region, eleven-sector CGE model with import embodied technology transfer from developed countries to developing countries. Simulation results show that service sector trade liberalization not only directly affects world service production and trade, but also has significant implications for other sectors in the economy. The major channel of the impact is through inter-industry input-output relations and TFP growth induced from services imported by developing countries from developed countries, which may be embodied with new information and advanced technology.     

City Children and Genderfied Neighbourhoods: The New Generation as Urban Regeneration Strategy

Former industrial cities in the West are employing gentrification as urban policy. In these policies, women and families currently play an important role as gentrification pioneers. In my analysis of Rotterdam in the Netherlands, I propose the term genderfication to understand the gender dimensions of this process. Genderfication refers to the production of space for different gender relations. I analyse Rotterdam's urban planning program for becoming a ‘child‐friendly city’, which entails replacing existing urban dwellings with new, larger and more expensive ‘family‐friendly homes’ as a strategy for urban re‐generation. Urban re‐generation supplements regeneration in the form of material and economic restructuring, and refers to the replacement of part of the current population by a new and better suited generation. The ‘child‐friendly city program’ is considered in tandem with punitive ‘youth policies’.     

Hierarchical Models in Environmental Science

Environmental systems are complicated. They include very intricate spatio-temporal processes, interacting on a wide variety of scales. There is increasingly vast amounts of data for such processes from geographical information systems, remote sensing platforms, monitoring networks, and computer models. In addition, often there is a great variety of scientific knowledge available for such systems, from partial differential equations based on first principles to panel surveys. It is argued that it is not generally adequate to consider such processes from a joint perspective. Instead, the processes often must be considered as a coherently linked system of conditional models. This paper provides a brief overview of hierarchical approaches applied to environmental processes. The key elements of such models can be considered in three general stages, the data stage, process stage, and parameter stage. In each stage, complicated dependence structure is mitigated by conditioning. For example, the data stage can incorporate measurement errors as well as multiple datasets with varying supports. The process and parameter stages can allow spatial and spatio-temporal processes as well as the direct inclusion of scientific knowledge. The paper concludes with a discussion of some outstanding problems in hierarchical modelling of environmental systems, including the need for new collaboration approaches.