摘要：The dyke experiences very high flood level more and more frequently. The timely issued ' The Standard of Dyke Design' has played an important role in the design, measure fea sibility study and examination of dyke reinforcement. Safety appraisal is required before dyke rein forcement design. But, the conducted item is safety demonstration in the process of dyke reinforcement design at present. This paper suggests that at least 8 aspects should be considered in safety demo nstration. The effective water head is considered as the most important factor for dyke safety and reinfo rcement design. Seepage control measure design is an important part of dyke reinforcement design . Its correct train of thought is discussed in this paper. Some other factors for dyke reinforcement d esign are also pointed out.

摘要：To ensure the stability of the high rock slopes of the permanent shiplock of the Three Gorges Project is the key to the successful construction and normal operation of the shiplock. In the course of the slope excavation, effective deformation monitoring, well understanding of the deformation characteristics, and reasonable analyzing and predicting of the deformation trend of the high slopes are important aspects of work for the slope excavation and dynamic design of the shiplock. The optimized design, successful implementation of deformation monitoring and accurate monitoring results are the important guarantee for carrying out the project. The monitoring design of the permanent shiplock was conducted in accordance with the general principles of 'laying stress on the key points, considering parts as well as the whole, planning uniformly and conducting in stages'. The deformation monitoring system of the permanent shiplocks is composed of survey network for horizontal and vertical displacements, monitoring points, inverted plumb lines, tension wires, extensimeters, etc.

摘要：本文对片式摩擦离合器的热负荷进行了理论分析、计算和试验研究。文中考虑了影响离合器热负荷的冷却油流量、油温、环境温度以及离合器几何尺寸等多种因素,对离合器的接合、脱开以及连续接合、脱开过程进行了建模和动态分析,提出了片式离合器摩擦片非稳态温度场数值计算的方法。根据试验和计算结果,推荐使用“摩擦面许用瞬时温度”作为衡量摩擦片热负荷极限的一个指标,为离合器的设计和选型提供依据。

摘要：随着美国保德河和圣胡安盆地裸眼煤层甲烷项目的成功开发，20世纪90年代末，澳大利亚的经营者们开始钻探裸，眼垂直并。此后的几年间，澳大利亚早期煤层甲烷经营者凭借着自身的聪明才智、积极创造和灵活变通，使气井设计取得了世界上其它任何煤层甲烷开发项目中前所未有的进展。这些经营者目前正在实施结构复杂的多层多边地表内层（SIS）气井设计，这种设计有望开采全球的煤层甲烷储层。