思小高速公路高填深挖改桥隧方案的环境影响分析

结合思茅一小勐养高速公路沿线具体的自然环境，通过分析高填深挖路段的具体情况，对公路选线过程中遇到的高填深挖与桥梁、隧道方案的比选从生态设计的理念方面进行了具体的环境影响分析。得出该公路的高填深挖改桥梁、隧道方案能够有效地减小公路建设对西双版纳热带雨林区的牛态环境影响，较好的与周围的环境协调，与自然景观融为一体。     

水系灭火剂的灭火性能对比分析研究

水是扑救A类火灾最常用的灭火剂,但水也存在流动易损失等不足,通过改变水的物理及化学性能可以提高水的灭火效率.试验表明强化水灭火效果和抗燃效果均优于水,但优势有限且价格较高;润湿水灭火及抗燃趋势均不明显,但良好的润湿渗透作用使其在扑救塑料类等火灾中发挥出明显的优势;粘性水因提高了水的粘度,增加了固水和封堵作用使其在抗燃方面具有显著的优势,其中的无机硅凝胶对堆垛或自燃类火灾的防、灭火效果最好,但高分子水胶体会因添加量小、无腐蚀性等优点替代无机硅凝胶用于煤矿井下火灾的预防和控制.     

20世纪90年代以来上海地区降水资源变化研究

为了揭示20世纪90年代上海地区降水资源的变化特点,根据1991-2003年上海地区11个站降水资料,在与前30年(1961-1990年)平均比较的基础上,统计分析1991年以来降水量、降水日数、相对湿度、蒸发量、降雪日的变化情况,结果表明:20世纪90年代以后,上海地区年平均降水量增加11%,汛期平均雨量增加18%,年平均降水日数却略有减少,这样使年平均降水强度增强了12%,季节分配格局改变,区域分布格局未变;年平均相对湿度和年平均蒸发量略减小,年平均降雪日数减少5d。     

物质投入产出表在义马市物质流分析中的应用

结合义马市的社会经济系统,构建了基于三维物质投入产出表(PIOT)的物质流核算模型.从不同层次对该市的社会经济系统进行分析.结构分析表明,经济发展严重依赖本地资源,产业链短,经济结构层次较低,行业关联度低.电力行业和煤炭采掘业为控制资源、污染的关键部门.技术水平分析表明,技术水平低、循环利用率相对较低,使得资源投入、污染排放量大.宏观比较分析表明,人均物质流、物质流强度都较高,物质使用效率低下.要提高该市的资源使用效率、降低污染排放,可通过结构调整、提高技术水平及循环利用率等途径实现.     

International Comparison of Occupational Safety and Health Research—A Review Based on Published Articles

A comparison of international literature in occupational safety and health (OSH) research over the years from 1980 to 1998 was conducted. The comparison is based on the different languages of the over 35,000 articles, which were collected from different databases. The distribution of languages in the analyzed data has to be considered carefully with respect to the original purpose of the data collection and the specific role of the international publication language, English. The comparison shows that in several aspects OSH research does not differ in different publication languages. In some methodological aspects, and in specific objects of research, differences between articles published in different languages can be found.     

我国两省份安全生产人才资源现状和问题及其原因探析

选取我国东部和中部两省份安全生产监管监察机构、企业和安全生产专业服务机构的安全生产人才为调研对象,通过发放调查表、集中座谈和资料收集,对两省份安全生产人才现状进行调研.根据统计结果,对两省份安全生产监管监察人才、企业安全生产管理人才、安全生产专业服务人才的数量、受教育程度和行业分布情况等进行量化比对分析.结合现场调研座谈情况,从人才数量、培养机制、保障措施等方面对两省份安全生产人才建设存在的主要问题及其原因进行了深入探讨,以期为我国安全生产人才政策措施的完善提供现实依据.     

I can't get no job satisfaction: Meta‐analysis comparing permanent and contingent workers

Scholars are concerned that contingent workers experience more adverse psychological job outcomes than permanent employees, but the empirical work on job satisfaction is mixed. The purpose of this study was to quantitatively summarize the potential mean differences in job satisfaction between contingent workers and permanent employees. Meta‐analytic results from 72 primary studies (N = 237 856) suggest that compared with permanent employees, contingent workers experience lower job satisfaction (d = ?0.21); but when outlying primary studies are removed, the mean difference is small but significant (d = ?0.06). Methodological artifacts explain small but significant differences in job satisfaction but do not account for much variance. Moderator analyses support previous findings that contingent workers are not a homogeneous group; some contingent workers (e.g., agency workers) experience lower job satisfaction than permanent employees, whereas the job satisfaction of other contingent workers (e.g., contractors) is similar to permanent employees. The findings have implications for increasing our understanding of job satisfaction by showing that job satisfaction appears to vary by employment type. Practical implications suggest that extending human resource practices to contingent workers may increase their job satisfaction, which has been shown to influence job performance, citizenship behaviors, and turnover. Copyright © 2012 John Wiley & Sons, Ltd.     

安规实验室仪器期间核查基本方法研究

本文介绍期间核查的作用,要素,结果的判定,从而认识安规实验室仪器期间核查的基本方法与意义,对安规实验室仪器的期间核查的运用有进一步了解和帮助。     

Using Multiple Watershed Models to Predict Water,Nitrogen, and Phosphorus Discharges to the Patuxent Estuary1

Boomer, Kathleen M.B., Donald E. Weller, Thomas E. Jordan, Lewis Linker, Zhi‐Jun Liu, James Reilly, Gary Shenk, and Alexey A. Voinov, 2012. Using Multiple Watershed Models to Predict Water, Nitrogen, and Phosphorus Discharges to the Patuxent Estuary. Journal of the American Water Resources Association (JAWRA) 1‐25. DOI: 10.1111/j.1752‐1688.2012.00689.x Abstract: We analyzed an ensemble of watershed models that predict flow, nitrogen, and phosphorus discharges. The models differed in scope and complexity and used different input data, but all had been applied to evaluate human impacts on discharges to the Patuxent River or to the Chesapeake Bay. We compared predictions to observations of average annual, annual time series, and monthly discharge leaving three basins. No model consistently matched observed discharges better than the others, and predictions differed as much as 150% for every basin. Models that agreed best with the observations in one basin often were among the worst models for another material or basin. Combining model predictions into a model average improved overall reliability in matching observations, and the range of predictions helped describe uncertainty. The model average was not the closest to the observed discharge for every material, basin, and time frame, but the model average had the highest Nash–Sutcliffe performance across all combinations. Consistently poor performance in predicting phosphorus loads suggests that none of the models capture major controls. Differences among model predictions came from differences in model structures, input data, and the time period considered, and also to errors in the observed discharge. Ensemble watershed modeling helped identify research needs and quantify the uncertainties that should be considered when using the models in management decisions.     

藻密度手工监测实验室间比对研究

为研究不同实验室藻密度监测数据的可靠性,现场采集了藻密度样品,处理为现场平行样和实验室前处理后平行样2种,分别由5家实验室的6名技术人员开展检测分析。参考相关技术规范要求,结合其他领域相似工作的成功应用案例,采用Z比分数法对分析结果开展藻密度实验室间比对。结果表明,数据的相对偏差均符合技术规范要求;对藻密度进行数据直接比对和对数转换后比对,各实验室对现场平行样和实验室前处理后平行样的检测结果均为合格;分析方法原理导致藻密度手工监测的绝对数值偏差较大,对当前的太湖水华预警工作适用性不高。