关于电厂生产废水综合处理与回用的工程实践

文章以西部某电厂为例,对该电厂生产废水综合处理工程进行分析,其废水处理采用的是机械加速澄清池-变孔隙滤池-双膜法工艺,该工艺处理稳定可靠,出水可回用作为循环水补充水。     

探讨影响混凝效果的因素

化学澄清池设备采用混凝处理的运行方式,混凝效果的好坏直接影响到澄清池的出水水质,进而会影响到除盐设备的运行工况,因此在实际工作中查找出影响混凝效果的各种因素是非常必要的。为便于说明问题,现以Al(2SO4)3为例,对影响混凝效果的各因素进行分析。     

不同地基模拟对新型澄清池受力的分析

新型澄清池是为处理高浊度水而研究开发的给水处理工艺中的主要处理构筑物。针对新型澄清池,研究弹性地基及刚性地基对新型澄清池结构内力的影响,模拟了四种工况并计算出新型澄清池池体基础的应力,经分析得出:采用刚性地基假定,将造成较大的计算误差,在实际工程中存在安全隐患。计算方法对同类工程具有参考价值。     

电厂化学水处理设施防腐蚀工艺问题及处理方法

为更好地保障电厂地下酸碱中和池、循环水加酸设备以及酸碱输送管道的安全,进一步做好电厂化学水处理设备的防腐工作。文章分析了电厂化学水处理设施防腐工艺存在的问题,并从多方面出发,提出了相应的处理对策,以供同行参考。     

电厂设备常见故障的分析和处理

在现代电力能源需求不断提高的今天,保障电厂设备稳定运行是设备维修部门的首要工作。科学分析电厂设备常见故障并进行必要的总结能够提高电厂设备维修能力、实现故障的快速排除。针对现代电厂设备组成以及电厂设备维修现状,加快电厂设备常见故障的分类及整理,加快电厂设备故障处理方法的研究有助于电厂设备的安全稳定运行、有助于提高电厂设备故障的排除效率,进而减少设备故障对电力供应的影响。现对电厂设备常见故障及处理进行了简要论述。     

电厂锅炉补给水预处理系统工艺浅析

文章中介绍的电厂原水为地表水,预处理的目的是除去水中的悬浮物、胶体物和有机物等.采用的方法是在原水中投加混凝剂(如硫酸铝等),使上述杂质凝聚成大的颗粒,借自重而下沉,然后过滤成清水.     

燃煤电厂脱硫设备运行中存在的问题及优化

燃煤电厂在实际运行当中影响了脱硫系统的原因是比较较复杂的,笔者通过长时间的设备运行总结,是可以找出影响脱硫系统吸收塔系统运行的相关因素,并进行相关的总结分析。如何运用停用检修机来降低故障的发生几率是确保设备正常运行的主要措施。本文主要分析了燃煤电厂脱硫设备在实际运行过程中发现的主要故障分析处理,并提出相应的解决方案和措施,予以有关单位参考与借鉴。     

福和污水厂工程建筑物设计

<正>一工程概况福和污水厂位于广州市区东南部,广汕公路以北,设计规模为2.5万m3/d。本工程主要由预处理、生化处理、污泥处理以及深度处理四个部分组成,主要有地下及半地下水池和地上构(建)筑物。构(建)筑物主要包括粗格栅及进水泵房、细格栅及旋流沉砂池、多段多级AO生物池、二沉池、混凝沉淀滤池、清水池兼接触池、     

球状壳体钢筋混凝土结构澄清池的施工

机械加速澄清池是一座球状壳体钢筋混凝土结构的澄清池。由于要保证刮泥机的工作，要求池底曲面的最大偏差不应超过±5mm，故施工的关键点和难点都在于球状壳体的池底施工。作者总结一个已成功施工的解决方案，与同行交流。     

基于策划与管理绩效的燃机电厂机组检修评价体系探析

燃气轮机、汽轮机和余热锅炉等是燃机电厂的主要设备,随着燃机电厂运行时间的不断增加,必须对机组设备进行检修,及时更换部件,确保机组运行的安全性和稳定性。就目前的情况来看,国内外关于燃机电厂机组检修效果评价方法以及标准的研究还处于起步阶段。鉴于此,文章对基于策划与管理绩效的燃机电厂机组检修评价体系进行了探讨。     

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.     

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.     

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.     

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.