化学环境下的应力-渗流耦合对尾 矿库稳定性影响试验

通过扫描电镜（FE-SEM）、能谱分析（EDX）、X射线衍射（XRD）、LMS-30激光粒度分析等室内试验探究了尾矿库内存在的酸、碱离子对尾矿颗粒的沉降、微观形貌、物质组成以及粒径级配的影响;建立酸、碱影响下的孔隙比与渗透系数的数学关系模型,并将建立的模型用来表征尾矿库内的应力渗-流场两场耦合机制,实现代入有限元计算软件的目的。结果表明:化学因素的存在影响着尾矿颗粒的多项性状,酸性环境下尾矿颗粒发生溶蚀,部分金属元素流失;碱性环境下尾矿颗粒间生成胶结物质,孔隙出现以含氢氧化铁为主的絮状、团簇状堵塞物,改变了渗流速度;尾矿库内浸润线高度在碱性、中性、酸性环境下依次降低,而渗流速度依次升高。     

能源利用中烃类气体检测技术研究进展

烃类气体作为地表油气地球化学勘查地下油气藏的直接指标,以及钻井液检测中指导钻井作业的重要因素,在挥发性烃类污染控制中也发挥着重要作用。通过对各类烃类气体检测技术现状和应用情况进行分析与整理,为该类技术针对不同目标的选择与组合提供了依据。     

Eco-design practices towards sustainable supply chain management: interpretive structural modelling (ISM) approach

Due to increasing emphasis on sustainable practices, many organisations have attempted to leverage their supply chain performance towards balancing triple bottom line dimensions (economic, environmental and social perspectives). This paper, therefore, determines the priorities of sustainable supply chain management focusing on eco-design. Interpretive structural modelling (ISM) and Matriced’ Impacts Croise’s Multiplication Appliquée a UN Classement (MIMAC) are used to identify the hierarchical structure of the relationships among eco-design dimensions, and to analyse characteristics power of each dimension on supporting eco-design practices. The relationships and characteristics power of each dimension are used to determine indicators that are effective in enhancement of eco-design practice, evaluated through sustainable supply chain performance. Results indicate that product deployment is an important approach for improving eco-design practice towards sustainable supply chain management. This emphasises the purpose and impact of eco-design on sequential supply chain activities at deployment phase. Further research is required to make an overall assessment of eco-design practices across range of manufacturing industries, given the current research is based on inputs from a limited number of experts of selected organisations.     

燃煤锅炉机组电改袋工程成功案例分析

以宝钢电厂3#机组电改全袋工程为例,论述了该成功工程的特点,介绍了袋式除尘器及滤料的比选过程、结构型式和设计参数,总结了除尘系统所具有的技术特色和投运后所取得的效果,该案例对袋式除尘器在电站锅炉的推广应用具有参考意义。     

降低超高压输电线路电晕噪声的对策研究

从电力金具的选型、设计、生产、运输、安装和优化改造等环节提出了降低超高压输电线路电晕噪声的对策措施。同时,通过对超高压输电线路铁塔可听噪声和金具电晕放电情况的检测,验证优化改造金具的降噪效果,查找金具安装的缺陷和漏洞,为金具制造和设计、预防电晕措施的选择及电力金具的改良、安装和运行等方面提供决策和参考依据。     

水体中高锰酸盐指数的流动注射分析方法

研究了用流动注射分析技术测定水体中高锰酸盐指数。使用新发明的耐腐蚀恒流泵、低记忆高效混合器、不存留气泡流通池等部件,通过高温高压,缩短消解时间,从而建立了一种可用于无人值守的自动在线快速监测水体中高锰酸盐指数的分析方法。     

大气污染排放窗口机制研究

以2种典型的污染排放源(点污染源和线污染源)为基础,提出排污窗口的概念,通过参数转换分解源强对污染扩散进行研究。首先在高斯污染扩散模型的基础上,对非持续性污染源强建模,然后以某烟囱的周期性排污分析,检验排污窗口设置的合理性。对于单双号限行的窗口性质的污染排放研究中,首先对交通流建立线污染扩散模型,然后融合元胞自动机(9元胞互影响)模拟区域多角度污染的扩散平衡,最后对"单双号限行"下北京市不同区域空气质量指标进行分析与仿真。分析结果表明,合理的排污窗口能够减轻污染程度及对人们日常生活的影响。     

电极移动速度效应检测仪系统的研究

分析了国际静电放电测试研究领域现有的各种测试研究装置特点，为克服已有测试装置缺陷本团队研发设计出一种全新的静电放电测试研究系统—电极移动速度效应检测仪。对其结构设计特点、功能进行了分析。我们研制的新型静电放电测试系统兼具实现真实直线运动准确调节和多环境因素可控的优点，彻底解决了困扰国际电磁兼容静电放电研究领域电极需高速向靶移动放电与避免强烈撞击损坏仪器的难题，实现了对多种因素影响逐一准确控制，为静电放电性质更为深入广泛的研究提供了新的手段和平台。     

Impacts of Upstream Building Width and Upwind Building Arrangements on Airflow and Pollutant Dispersion in a Street Canyon

A two-dimensional numerical model for evaluating the wind flow and pollutant dispersion within a street canyon was first developed using the FLUENT code, which was then validated against a wind tunnel experiment. Then, the effects of the upstream building width and upwind building arrangement on the airflow and pollutant dispersion inside an isolated street canyon were investigated numerically. The numerical results revealed that: (1) the in-canyon vortex center shifts downwards as the upstream building width increases; (2) the recirculation zone covers the entire upstream building roof for the cases when W/H = 0.5, 1.0, 1.5, and 2.0 (W is the upstream building width and H is the building height), whereas the flow reattaches the upstream building roof for the cases when W/H = 2.5 and 3.0; (3) when the upstream building width is shorter than the critical width W_C (= 2H), an increase in the upstream building width leads to an increase in the pollution level on the leeward wall of the canyon and a decrease in the roof-level concentrations at the upstream building; (4) when the upstream building width is longer than the critical width, the roof-level concentrations at the upstream building are negligibly small and the pollution level on the leeward wall of the canyon is almost unaffected by a further increase in the upstream building width; (5) when the buildings are placed upwind of the canyon, the flow attaches the upstream building roof and, therefore, almost none of the pollutants are distributed on the upstream building roof; and (6) the pollution levels inside the canyon and on the downstream building roof increase significantly with the number of upwind buildings.     

地磁绝对测量对中等地震的反应

介绍了1993年获得的两个中等地震震例的情况,并以此验证据以往震例总结出的预报公式。验证的结果与实际符合较好。另外,文中指出了该手段的主要优点及克服其缺点的可能途径,即有些台站可采用地磁等变线差值法处理。