2008年桂北架空线路覆冰的初步分析

根据2008年广西桂北电网遭受雨雪冰冻灾害的覆冰特点,对强冷空气入侵的天气变化过程、覆冰形成的条件、线路覆冰厚度的计算、本次覆冰的特点、重现期的评估以及实际冰厚与气象区划的比较等多方面进行分析,提出加强电网抗冰能力的建议.     

国内外非传统水资源开发利用

非传统水资源主要包括雨水、污水和海水。雨水收集利用、污水资源化和“海水开源”已经成为城市开发新水源的主要措施。阐述了国内外非传统水资源的开发利用现状和发展，总结国外非传统水资源开发利用的经验．并针对我国与发达国家在此方面的差距提出了相应的建议。     

汶川震区清平乡文家沟泥石流灾害特征分析

2010年8月13日凌晨在四川省绵竹市清平乡暴发了16条泥石流,其中1条特大型(文家沟泥石流),1条大型(走马岭沟泥石流),9条中型,5条小型。清平乡场镇暴发的文家沟泥石流规模最大,泥石流冲出固体物质总量达310×104 m3,文家沟泥石流将清平乡老场镇的大部分区段淤埋。由于这场泥石流灾害发生在汶川地震高烈度区,是地震与降雨共同作用的结果,研究其形成原因,对于进一步认识强震区泥石流发育特征具有重要的意义。根据现场调查,从物源条件、地形条件、降雨条件分析了泥石流形成原因,并分析了泥石流成灾特征及成灾过程机制,以及泥石流运动特征等。     

城市水土保持中渗沟措施设计要点及案例分析

北京市作为严重缺水城市．如何有效利用水资源成为了社会各界关注的焦点问题。同时,雨水的收集与利用作为城市水土保持工作研究的重要课题．正逐渐被人们关注。针对目前北京市房地产建设项目地表雨水入渗与收集的情况．介绍了渗沟这一城市水土保持雨水收集与利用措施,详细分析渗沟措施设计要点及入渗能力。通过对北京市具体案例的分析。阐述了渗沟措施典型设计对雨水收集及地表水入渗的能力．提出了渗沟设计对地表雨水收集所起到的重要作用,希望对城市中水土保持渗沟措施的设计具有参考意义。     

Landslide and mudflow disaster in disposal site of surplus soil at Higashi-Hiroshima due to heavy rainfall in 2009

The collapse of a filling occurred due to heavy rain in Higashi-Hiroshima City׳s Shiwa District at about 5:30 am July 25th, 2009. The filling was made of surplus soils, and it contained a mass of water supplied from rainfall and ground water flow of a permeable layer at the bottom of the filling. The collapsed soil flowed down and destroyed a house. In this paper, the cause of this disaster is discussed. The site of the disaster was used as the dumping site of surplus soils, after several changes of ground formation. The history of the geographical change was reconstructed by the image processing of old map, aerial photographs, result of 3-dimentional laser survey carried out after collapse and the measurement of thickness of collapsed soil by dynamic cone penetration test. According to the result of processing, the shape and the size of the filling before collapse was reconstructed. The relationship between the rainfall and the groundwater in the river sediments layer over which the filling was constructed was determined. A stability analysis of the filling was conducted considering the rise of the groundwater level in the filling and the laboratory measured strength parameters. The results of the stability analysis showed that the collapse would have taken place when the groundwater level rose by about 9 m due to the supply of groundwater through the river sediments layer.     

太阳风暴对航天器电子产品的影响

太阳风暴是一种常见的空间灾害天气现象，对人类的航天活动有着巨大的影响。对太阳风暴的产生原因和航天器电子产品在太阳风暴发生期间可能遭受的影响，作了全面分析。针对这些影响，提出了提高航天器电子产品抗太阳风暴能力的建议以及相应的防护措施。     

城市化对青岛市崂山区雨岛效应的影响

针对城市化对雨岛效应的间接影响，以青岛市崂山区为例，在分析崂山区基本地形、水文气候状况的基础上，利用地表温度反演、土地利用分布、泰森多边形、回归分析等方法分析了崂山区城市化对雨岛效应的影响。结果表明，城区温度增高与降雨之间满足线性回归关系，可见城市化是崂山区雨岛效应的重要因素。     

Rural industrialization and environmental disamenities: the case of the Bendel cement company,Okpella Bendel state (Nigeria)

This paper attempts a comparative analysis of the economic and non‐economic damage of rural industrialization to the environment of a poor community in a developing country. The major finding is that rural industrialization is more directly and strongly associated with environmental disamenities than with economic loss. A policy implication of this is that the package of rural industrialization strategy in developing nations must transcend conventional compensation schemes. The package must include programmes to provide for alternative sources of water, say, and an adequate health care delivery, where the disamenities caused are in the forms of polluting natural sources of water supply and/or increasing health hazards.     

振实及加砂系统在消失模铸造生产线上的应用

文章着重介绍了美国GK公司和Vulcan公司的振实及加砂系统的基本组成、工作原理、技术参数及特点,并对这两种设备在消失模生产中的使用情况进行了总结。     

“水立方”围护结构声学性能研究

国家游泳中心“水立方”采用大面积ETFE膜气枕作为围护结构，ETFE膜气枕的声学性能将直接影响比赛大厅的室内声学设计效果与室内装饰效果。在比赛大厅声学设计过程中，建立了声学测试专项实验室，对ETFE膜气枕的声学性能进行测试，获得了真实详尽的数据。本文对声学实验室的建立、声学性能的测试过程做了较为详细的介绍，对测试结果进行了分析与总结，希望对类似材料构造的声学性能测试提供一些参考资料。