液压制动式运输绞车与信号闭锁的研究与改造

该文主要针对煤矿在安装、撤除工作面综采设备或掘进运输过程中,由于绞车操作按钮与信号分别控制,相互不实现互锁,而容易出现的运输事故的防范方案及液压制动式绞车真空磁力启动器的技术改造方法.     

潘二煤矿1811(1)工作面综采设备快速安装工艺研究

文章结合潘二煤矿具体地质条件,对工作面设备选型的依据进行了简要的分析,具体的介绍了1811(1)工作面综采设备运输及安装过程,对运输安装过程中所采取的技术工艺进行了详细的阐述,提出了综采工作面设备快速安装的技术途径,提高了1811(1)工作面的安装工作效率,实现了1811(1)工作面综采设备安全、快速安装。     

变频一体机在刮板运输机上的实践与应用

煤矿综采工作面刮板运输机电机通常采用双速电动机驱动系统,使用工频直接启动的方式,容易造成设备快速启动,产生较大的机械冲击和电气冲击,减少了设备的使用寿命。变频一体机在刮板输送机上的应用成为人们研究的热点,变频调速一体机的使用实现了煤矿工作面刮板输送机变频技术的应用,减轻了起动机械转矩对设备的机械损伤,减少设备故障率,提高了煤矿生产效率。     

刮板输送机变频技术在煤矿超长工作面的应用

煤矿综采工作面刮板输送机驱动电机使用工频直接启动的方式,设备快速启动,启动电流大,对设备造成严重的冲击,加速了设备老化,减少了使用寿命。变频调速一体机的使用实现了煤矿超长工作面刮板输送机变频技术的应用,它集变频器和驱动电机于一体,占用空间小,电缆使用减少,易于安装。     

大采高综采工作面支架设备回撤方案分析

为实现大采高综采工作面支架的快速、安全回撤,文章对某煤矿综采工作面支架回撤技术进行了对比与选择分析,并详细分析了在复杂地质条件下综放工作面设备及支架回撤的支护方案及安全技术,为今后综放工作面设备及支架回撤工作提供技术借鉴.     

综采工作面快速安装技术的研究与应用

随着经济的发展,我国对于煤矿等能源的需求越来越大,这就对煤矿的采掘技术提出了更高的要求。综采技术的提升促进了产量的提高,而产量的提高又反过来导致了综采工作面搬家的次数增加。由于综采工作面所安装的综采设备体积大、质量大,解体、运输、组装工程量大,因此探究综采工作面快速安装技术对于提高矿井的生产效率具有重要的意义。本文将简要探究综采工作面快速安装技术。     

综放工作面安全快速回撤技术实践

随煤矿开采机械化程度的提高，综放工作面大型设备搬迁速度的快慢将直接影响到采煤工作面的正常衔接。本文通过对望云煤矿3203工作面回撤工作的总结，为同类型矿井如何利用现有生产技术条件实现快速安全回撤提供了一定的借鉴经验。     

论实现综采工作面设备安装技术的探讨

综采工作面的设备安装,对于整个采煤过程来讲意义至关重要。本文结合某煤矿的综采安装技术,根据理论知识与实践经验,提出了具体的安装措施,应用效果显著,为综采工作面的快速安装提供了参考。     

综采工作面快速搬家成套装备与技术实际应用研究

文中主要针对综采工作面快速搬家的装备和技术的现实状况,以及发展规律进行了一个全面的介绍.具体是对井下工作面快速搬家的成套装备和技术及其实施的效果推广作了一个分析.而且还对井下工作面各种生产装备的不同的搬家技术与实施步骤做了一个介绍.本文主要选择的是支架回撤工艺,作为煤矿综采工作面快速搬家的设备选型的参考.     

综采放顶煤工作面大型设备快速稳装、撤退过程中的工艺优化与应用

随着煤矿千万吨级大型矿井的不断建设,大型设备的运输与稳装将成为矿井工作面能否正常衔接、交替的一个关键,如何稳装撤退综采放顶煤工作面大型设备、特别是实现稳装撤退期间不停产、不减产,更是一个重要环节,通过工艺优化缩短工期,在稳装撤退设备的过程中如何能将设备"安全、快速、高效"的稳装及撤退,这项工作就显得尤为重要,将是大型煤矿长期探讨的一项重要工作。     

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.     

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.     

Performance appraisal and culture: practice and attitudes in Hong Kong and Great Britain

This article compares the practice of and attitudes towards performance appraisal for managerial and professional staff in Hong Kong and Britain, and considers the extent to which actual practice and employee preferences are in alignment. Findings suggest that appraisal may be more widespread in Hong Kong than in Britain. However, British appraisal tends to be more participative and to place greater emphasis on discussing objectives, development and career plans. Hong Kong appraisals appear to be more directive and Hong Kong respondents perceive a higher level of 'negative' appraiser behaviour. In spite of this, Hong Kong respondents show if anything slightly more confidence in the utility of appraisal than do British respondents. They show stronger support for appraisal's use for reward and punishment and less support for the objectives-setting and training and development uses than do the British sample. Hong Kong respondents are more likely than their British counterparts to favour involving a more senior manager in appraisal, and they are less likely to prefer more frequent appraisals. There was little evidence that Hong Kong respondents had a stronger preference for group-based appraisal criteria, although they did show more support than the British sample for the use of personality as a basis for appraisal. Overall, the suggestion is that appraisal has been adopted in Hong Kong organizations but that the practice of appraisal has been adapted to suit the cultural characteristics of the society.     

Narrative construction of expatriate experience and career cycle: discursive patterns in Finnish stories of international

Expatriate experience is not only a disconnected occasion for cross-cultural anxiety and adjustment but also an important event in the process of self-development and learning. Following this view and arguing for a discursive approach, the paper focuses on ways in which expatriates themselves tell and interpret their development and movement across expatriate career cycle. Meaning systems connecting expatriate job with previous and following work experiences in career stories of Finnish engineers and managers were identified using a combination of narrative and discourse analysis. No evidence was found of an autonomous expatriate discourse but, in contrast, expatriate career cycle was narrated using available organizational repertoires of development and career. Describing and discussing the meaning-making properties of three identified discourses - bureaucratic, occupational and enterprising - the paper emphasizes the organizational environment of expatriate experience while acknowledging the limits of these contemporary career vocabularies in addressing individual learning and change in cross-cultural settings.     

Internet professionals: job skills for an on-line age

The paper explores the increasing popularity of the Internet technology Singapore. It argues that the diffusion of Internet technology to South-East Asia would create new duties and responsibilities for human resource (HR) managers. One such duty is the identification of the skills which professional Internet staff would need to perform their work effectively in organizations. Using a triangulation research method, empirical study has identified the new professional Internet jobs which have emerged the IT industry in Singapore and the skills that professional Internet personnel require do their jobs effectively. Analysis of the findings indicates that professional Internet skills involve both technical and creative abilities and that, in explaining or defining professional Internet skills, it is necessary to use both the technical and the social conceptions of skill. This argument is based on the view that the creative skills include tacit skills so that a definition based solely on the technical conception of skill cannot capture the various dimensions of Internet skills. The implications of the research findings for human resource managers are raised.     

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.     

关于高校教学秘书工作的认识与思考

教学秘书在教学管理中起着举足轻重的作用,本文结合自己近6年从事教学秘书的工作实践和体会,阐述了高校教学秘书的工作职能和工作内容,提出了教学秘书应具备的素质,分析了日前教学秘书工作中存在的问题,探讨了教学秘书工作改进的方法与途径。     

Sister Communities: Rejecting Labels of Informality and Peripherality in Vanuatu

Some labels have dire consequences. This article takes issue with the labels commonly used to describe the physical and social location of communities living on the edge of Port Vila, Vanuatu—labels that position communities for eviction by entrenching tropes of informality and peripherality into how they are seen and represented. Such terms include informal, settlement, informal settlement, squatter and peri-urban. Based on interviews with around 100 people and two years of ethnographic engagement with urban communities in Port Vila, Vanuatu, I critique the language of policy against the lived experience of those at the urban edge. I use Bourdieu's articulation of power as an accumulation of symbolic capital that enables one to speak the world into being. I conclude that the language of policies and plans is reflective of a dominant discourse in urban studies and international aid, and non-reflective of the experience and identities of people living at the urban edge. My interviewees and interlocutors maintain their identities as sister communities—as places grounded in the formality of customary tenure, and as part of the city rather than outside it.