国有企业面临的深层矛盾及其出路(上)

揭示了当前国有企业改革与发展中面临的２０个深层矛盾，分析了产生矛盾与困境的原因，提出并论证了化解国有企业矛盾、走出困境的基本思路以及“抓重放轻”的改革战略。     

Job demands and pesticide exposure among immigrant Latino farmworkers.

The goal of this study was to understand the potential threat of job stressors to farmworker health. To accomplish this goal we studied pesticide exposure, an issue with immediate and long-term health consequences, and predictions from the Demands-Control model of occupational stress. Longitudinal, self-report data and urine samples were collected at monthly intervals from a cohort of Latino farmworkers (N = 287) during the 2007 agricultural season. The primary hypothesis was that greater exposure to psychological demands, physical exertion, and hazardous work conditions are associated with greater odds of detecting dialkylphosphate (DAP) urinary pesticide metabolites, biomarkers indicating exposure to pesticides. Contrary to this hypothesis, results indicated that none of the elements of the Demands-Control model were independently associated with detection of DAP urinary pesticide metabolites. However, analyses produced several interaction effects, including evidence that high levels of control may buffer the effects of physical job demands on detection of DAP urinary pesticide metabolites. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

浅谈国储库建设工程项目管理

粮库建设项目的管理，虽然属于建筑产品这一工程项目的管理范畴，由于国家储备粮属于重要的战略物资，粮库建筑有其特殊的属性，是以安全存储散粮为目的的专用建筑物。就粮库建筑特殊性，利用经济管理理论，结合新沙港粮库扩建工程实际，介绍国储库建设工程项目管理的一些经验，对今后粮库建设与项目管理具有借鉴意义。     

风力发电机组噪声测试分析研究

在内蒙古某风电场，利用特定的振动与噪声测试和分析系统，对1000W风力发电机组的整机噪声进行了测试与研究。经分析，该风力发电机的最大噪声小于70dB（A），符合国家标准的要求。该项工作可为今后噪声控制及降噪措施的研究提供一定的实验依据。     

Understanding ‘local’ opposition to wind development in the UK: How big is a backyard?

In recognition of the environmental and economic threats posed by climate change; decisive steps are now being taken to stabilise greenhouse gas emissions. One sector receiving particular attention within the UK is that of electricity generation. As such, the government has introduced ambitious targets for increasing renewable generating capacity within the country. Wind turbines are expected to play a significant role in meeting these targets; however, despite high levels of support for the technology in principle, specific projects are often delayed or rejected on account of local opposition. This study aimed to establish how attitudes towards development might vary with respect to increasing distance from the identified sites. Participants were required to register their opinion towards development at a number of on- and off-shore locations in the UK. The results indicated that participants were most favourable to offshore development and least favourable to development at the identified sites. Attitudes to onshore development indicated that so long as a proposed location was anticipated to be ‘out of sight’ it was considered in relatively general terms. The results are discussed with reference to site visibility and landscape concerns and clearly support calls for a shift towards community-focussed development strategies.     

Output power leveling of wind turbine generators using pitch angle control for all operating regions in wind farm

Effective utilization of renewable energies such as wind energy instead of fossil fuels is desirable. Wind energy is not constant and windmill output is proportional to the cube of the wind speed, which causes the generated power of wind turbine generators (WTGs) to fluctuate. In order to reduce the output power fluctuation of wind farms, this paper presents an output power leveling control strategy for a wind farm based on both the average wind farm output power and the standard deviation of the wind farm output power, a cooperative control strategy for WTGs, and pitch angle control using a generalized predictive controller (GPC) in all WTG operating regions. Simulation results using an actual detailed model for wind farm systems show the effectiveness of the proposed method. © 2007 Wiley Periodicals, Inc. Electr Eng Jpn, 158(4): 31– 41, 2007; Published online in Wiley InterScience ( www.interscience. wiley.com ). DOI 10.1002/eej.20448     

工程塑料在“工厂化高效农业工程”中的应用

介绍工程塑料在“工厂化高效农业工程”中的应用现状及发展前景。     

湿法磷酸装置综合罐区雨水收集外排措施

介绍湿法磷酸装置综合罐区雨水收集及外排的相关措施。通过采取在贮槽顶部铺设雨水收集管、建立雨水收集隔离围堰等方法,收集雨水并外排,减少了污水产生量,年节约污水处理费用约60万元。     

基于互动理论的我国矿产资源型企业发展混合所有制总体思路初探:以石油天然气企业为例

党的十八届三中全会提出"积极发展混合所有制经济",并将其作为基本经济制度的重要实现形式。矿产资源产业中,石油天然气企业具有典型的产业链条长、专业技术要求高、行政管制涉及环节多、国有资本比重大等特点。通过与埃克森美孚等国外石油公司对标分析可知,我国三大石油公司存在盈利能力差、管理效率低、创新能力有待提高等问题,结合外部环境分析,提出其发展混合所有制经济的动因。本文结合经济学中引申的互动理论框架,以及中石化案例的分析,以石油天然气企业为例,提出应在资产、产业和治理三个层面实现互动,实现效益提升、产业融合和治理完善三方面目标,并针对这三方面目标提出发展混合所有制经济的总体思路及若干建议。     

考虑尾流效应和集电系统元件故障的风电场可靠性建模

分析平坦地形和复杂地形下风电机组间尾流效应对风电场输出功率的影响;建立两状态等值风电机组以及五状态断路器、三状态变压器等集电系统元件的可靠性模型,考虑集电系统元件故障对风电场输出功率的影响。运用威布尔分布模拟风速,对风速、等值风电机组状态、集电系统元件状态等进行非序贯蒙特卡洛抽样仿真,基于MATLAB进行编程计算。结果表明,尾流效应和集电系统元件故障对风电场的输出功率都有不可忽视的影响,综合考虑二者的风电场可靠性模型提高了对风场输出功率计算的真实性和准确性,评估风电场并网可靠性指标时更为精确、贴近实际。