龙开口水电站溢流坝段动力模型破坏试验研究

采用仿真混凝土材料研究了龙开口水电站溢流坝段在不同因素影响下的动力破坏特征,并通过对6个模型试验结果的分析探讨了溢流坝段的动力破坏机理。试验中考虑了坝体-库水的动力相互作用以及横河向地震动对大坝破坏的影响,采用规范谱波和场地谱波两种地震动激励进行模型超载破坏分析。试验结果为工程设计和评价溢流坝段的抗震性能提供依据。     

聚氧化乙烯—聚磷酸钠共混物的钠离子导电性

研究了聚氧化乙烯-聚磷酸钠共混物的钠离子导电性和低分子量多缩乙二醇对共混物导电性的改进作用。结果表明,降低多缩乙二醇的分子量以及增加其含量都有利于提高共混物的离子导电率。增塑剂改进共混物导电性的实质是提高共混物的非晶相含量,共混物内钠离子传导发生在非晶区,聚合物链段运动是离子传导的主要推动力。     

盛钢桶铝锆碳滑板的研究与生产

通过研究,在盛钢桶用铝锆碳滑板的生产过程中,调整了ZrO2的加入量,添加了复合抗氧化剂,使滑板具用较高的强度和抗氧化性能,提高了滑板的使用寿命.     

Sub-100 fs Kerr lens modelocked Cr4+:YAG laser

Sub-100 fs pulse generation from a Kerr lens modelocked Cr⁴⁺ :YAG laser has been demonstrated for the first time, yielding femtosecond pulses tunable from 1.49 to 1.56 μm with pulses as short as 90 fs obtained at 1.53 μm     

An annular slot antenna on a dielectric half-space

The radiation properties of both singly and multiply fed annular slot antennas on a dielectric/air interface have been analyzed using Galerkin's method applied in the Hankel transform domain. The validity of our method has been confirmed through comparison with both theoretical and experimental results. The magic slot configuration has also been studied. The polarization diversity of this radiator makes it suitable for implementing a quasioptical balanced mixer     

An approximate method for computing performance-related reliability of gracefully degrading systems

Using existing methods, the computation of performance-related reliability (PRR) of large-scale gracefully degrading systems is very tedious and time consuming. In this paper, the behaviour of such systems is respectively modeled as two types of diffusion processes according to their reconfiguration coverage. If the coverage is 1 (i.e. the reconfiguration is always successful), it is modeled as a regular diffusion. If, on the other hand, the coverage is less than one, it is modeled as diffusion with killing. Kolmogorov backward equations for regular diffusion processes and for diffusions with killing are then applied to compute the PRR. The methods have been applied in several examples, and the results satisfactorily agree with the accurate results.     

补偿元件对载体催化元件输出特性的影响

阐述了矿井瓦斯传感器－载体催化元件在应用中，补偿元件发挥的作用和工作原理，着重分析了补偿元件对载体催化元件输出特性的影响，探讨了提高线性补偿效果的方法。     

蚕庄金矿倾斜采场的地压研究

本文使用工程地质、室内试验及数值分析的方法对蚕庄金矿的倾斜矿房的地压活动规律进行了研究，得出了一些有价值的结论。     

冷41-平14"L"型水平井轨迹优化与控制技术

冷41-平14井受地面条件的限制,靶前位移小,为保证中间套管和完井管柱的顺利下入,剖面设计为“反向造斜-稳斜-降斜-正向造斜-水平段”的“L”型。简要介绍了冷41-平14“L”型水平井的设计概况,详细介绍了该井井眼轨道优化设计原则和设计结果,以及实钻井眼轨迹连续控制技术。该井精确命中A、B靶,两靶处的井斜角、方位角和垂深等达到了设计要求,在A靶实现了软着陆。该井井眼轨道优化设计和井眼轨迹控制技术为类似水平井的井眼轨道设计和轨迹控制提供了有益的借鉴。