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131.
总结了国内外著名跨国石油公司海外员工健康管理的方法和实践,对当前海外员工管理进行综合研究、分析,以某典型石油公司为例,提出海外员工健康管理平台的构建方法。 相似文献
132.
Pratim Biswas Wei-Ning Wang Woo-Jin An 《Frontiers of Environmental Science & Engineering in China》2011,5(3):299-312
Energy issues are important and consumption is slated to increase across the globe in the future. The energy-environment nexus
is very important as strategies to meet future energy demand are developed. To ensure sustainable growth and development,
it is essential that energy production is environmentally benign. There are two temporal issues—one that is immediate, and
needs to address the environmental compliance of energy generation from fossil fuel sources; and second that is the need to
develop newer alternate and more sustainable approaches in the future. Aerosol science and technology is an enabling discipline
that addresses the energy issue over both these time scales. The paper is a review of aspects of aerosol science and engineering
that helps address carbon neutrality of fossil fuels. Advanced materials to meet these challenges are discussed. Future approaches
to effective harvesting of sunlight that are enabled by aerosol studies are discussed. 相似文献
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134.
焦化废水脱氮处理技术进展 总被引:1,自引:0,他引:1
评述了焦化废水脱氮处理方法,包括蒸氨法、折点加氯法、吸附法、催化湿式氧化法、烟道气治理法及生物法,介绍了传统处理方法的改进措施及其适用情况,并对生物脱氮领域最新研究理论及工艺发展方向进行了介绍。 相似文献
135.
水产养殖自身污染及其生物修复技术 总被引:18,自引:0,他引:18
介绍了生物修复的概念、水产养殖存在的自身污染问题及其主要生物修复技术。营养物污染、药物污染和底泥富集污染是水产养殖存在的主要自身污染问题;微生物修复、水生植物修复和水生动物修复是污染养殖水域生物修复的3种主要形式;微生物的有效性、生物入侵、二次污染、修复生物的季节性和非水生植物的利用等方面是实施生物修复应注意的主要方面。最后指出,推行清洁生产、实行生态养殖是水产养殖业可持续发展的出路。 相似文献
136.
采用间接边界元法(IBEM),研究了平面SV波入射下场地动力特性对衬砌隧道地震反应的影响问题。充分利用半空间格林函数和全空间格林函数在分别构造含孔半无限空间域和闭合域内散射波场方面的优势,将含有衬砌隧道的层状半空间分解为含孔层状半无限空间域和一个环形衬砌闭合域。在半无限空间域孔洞边界和闭合域边界各单元上分别施加虚拟均布荷载,进而求得半空间和全空间域内的位移、应力格林函数,然后根据边界条件确定虚拟均布荷载密度,最后求得衬砌内表面动应力集中系数。验证了方法的正确性,并以基岩上单一土层和基岩上三层土为例,计算分析了层状弹性半空间中隧道衬砌内表面动应力集中系数。结果表明,随着基岩土层刚度比的增大,动应力集中系数峰值减小;随着土层厚度增大,动应力集中系数峰值总体上呈减小趋势;对于不同土层层序,动应力集中系数峰值明显不同。 相似文献
137.
This paper introduces the basic concepts of risk as the research background and reviews a widely applied semi-quantitative tool for risk assessment, namely risk matrix approach (RMA) as well as its typical variations. Based on the deep analysis of the essence and defects of RMA, some extensions on risk matrix approach are presented and their superiorities compared with the related quondam methods are demonstrated by a case study. The features and advantages of the new extensions are discussed and the prospects of the future study are addressed. 相似文献
138.
139.
140.
Lihui ZHANG Guomin CAO Yulei FEI Hong DING Mei SHENG Yongdi LIU 《Frontiers of Environmental Science & Engineering》2011,5(4):604-609
A composite membrane bioreactor (CMBR) integrating the immobilized cell technique and the membrane separation technology was developed for groundwater denitrification. The CMBR had two well mixed compartments with one filled with the nitrate- containing influent and the other with a dilute ethanol solution; the compartments were separated by the composite membrane consisting of a microporous membrane facing the influent and an immobilized cell membrane facing the ethanol solution. Nitrate and ethanol molecules diffused from the respective compartments into the immobilized cell membrane where nitrate was reduced to gaseous nitrogen by the denitrifying bacteria present there with ethanol as the carbon source. The microporous membrane was attached to one side of the immobilized cell membrane for retention of the disaggregated bacteria. Relative to the single dose of external ethanol, the two-dose supplementation produced better treatment results as evidenced by the lower concentrations of N O 3 - - N and ethanol (as measured by total organic carbon) of the effluent. The batch treatment in CMBR removed most of the nitrate in the influent and attained a stable denitrification rate of 0.1 g·m-2·h-1 for most of the 96-h cycles during the 30-cycle study. The effluent was essentially free of ethanol and nitrite nitrogen. 相似文献