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To all project practicality, the introduction is given to the operational characteristics, the methods for calculation and the researching actuality of the tail tunnels with sloping ceiling underground hydropower stations the Three Gorges. This paper has discussed in detail the characteristic method being the same with the compressive flow and the Priessmann solution being the same with the free-surface-pressure flow. And how to deal with boundary conditions has been expatiated. Also hydraulic transient process of tremendous load fluctuation in the tail tunnels with sloping ceiling has been numerical simulated and the Fortran program for numerical simulation has been given. The paper gain the maximal press for tail end of the shell, the maximal rising rate of rotational speed of generating set, the maximal vacuum degree for inlet of the tail tunnels and so on under 11 kinds conditions of tremendous load fluctuation. These conditions include the design conditions, the check conditions and the superposition conditions. Finally, the computing results have been analyzed and summarized. The end chapter is the general comment of the whole-length content and the describing of the intending view of researching.

本文以三峡右岸地下电站尾水洞设计为背景，从工程实际出发，阐述了变顶高尾水洞的工作特性、使用范围及其研究现状；详细论述了适用有压流的特征线法、适用明满交替流的普里斯曼解法等数学模型；边界条件的给定和明满交替流的计算方法；用Fonran语言编制了数值计算程序，对三峡右岸地下电站变顶高尾水洞的大波动工况进行了数值模拟，分别得出了在设计工况、校核工况和叠加工况下蜗壳末端最大压力上升值、机组最大转速上升值和尾水管进口最大真空度等重要参数；对数值计算结果进行了详细分析并得出了有价值的结论；最后展望了今后水电站变顶高尾水洞的研究方向。

Because a bulk smoothing capacitor is usually installed on the DC side of many AC to DC converters, the characteristics of harmonic loads will be influenced by this capacitor. Nowadays, shunt active power filters can't reduce harmonics effectively for this voltage type harmonic-producing load. Therefore, a series active power filter is designed to meet the requirements of voltage-sourced harmonic loads. Both source current and load voltage are detected in order to reach the compensation voltage for the SAPF.

由於许多交直流电源转换器均在直流端并联一直流电容以作为稳压之用，此大电容将造成负载谐波特性的改变；此类谐波源负载，如果使用现今常见的并联型主动式电力滤波器并不能很有效解决此类谐波问题；因此本文将采用串联型主动式电力滤波器，并配合同时量测电源电流及负载电压的混合式控制模式，即可有效解决此类谐波问题。

In gas-puff Z-pinch experiments,the snowplow model,one of the simplest and commonly used models,has been used to predict the implosion time from the generator current parameters,the load mass per unit length,and initial radius of annular gas load.

在喷气Z-pinch内爆等离子体研究中，雪铲模型是一种常用的、比较简单的物理模型。

This reasoning recognizes the load carrying capacity of the soffit and stem section at or near f ′c and the relatively light load of the deck.

这个道理认识的承载能力的檐口和茎段或近六' C和相对轻负荷的30%~50%。

The interface bond capability and the failure mode of soffit strengthening are studied, as well as the influence of strengthening concrete technique to the interface bond capability. The cracked load, the failure load, the tension stiffness, the stress of the steel bar and the cracks of the strengthening arch are compared with those of the contrast arch.

第五，考虑到实际工程应用，设计并制作了采用增大截面法在拱腹部位加固钢筋混凝土拱圈试件，研究拱腹加固新老混凝土结合面的粘结性能及破坏形式和补强混凝土的施工工艺对新老混凝土结合面粘结性能的影响。

By using the ABAQUS finite element software to simulate the elastic long single pile with or without cap in clayey soil subject to lateral load, the influence of cap area, embeded depth and vertical load are analyzed in the paper, some valuable results and conclusions are obtained.

笔者采用ABAQUS大型有限元软件，对粘性土中水平受荷桩进行模拟，分析了承台面积大小、承台埋深以及垂直荷载对弹性长桩水平承载力的影响情况，得出了一些有价值的结果和结论。

On the basis of the bearing capacity at home and abroad, this paper puts emphasis on studying the settlement curve and the soli plastic zone when the uniform and layered shallow foundation is applied by the vertical load and combined load.

本文在分析研究国内外有关浅基础承载力理论及研究现状的基础上，利用自编面向对象有限元程序，对均质地基、层状地基在承受竖向荷载、复合荷载时的沉降曲线、塑性区的开展等进行了分析和探索。

After the low load capacity reason of the sprocket wheel was analyzed, the methods of increasing the load capacity were given from three ways: determining the structure of the rolling wheel, choosing the pressure angle of the tooth sharp and decreasing the friction of the tooth face.

分析了星轮承载能力低的原因，并从辊轮结构的确定、齿形压力角的选择、齿面摩擦的降低等三方面给出了提高星轮齿面承载能力的措施。

Voltage of active power filter can be controlled by system harmonic current, load harmonic current ,harmonic current of spur track, load harmonic voltage, or combination of them, further more, a comparison research on different control strategies is put forward, and the control strategy of ideal filtering is achieved at last.

HAPF的谐波电压可以受控于系统谐波电流、负载谐波电流、滤波支路谐波电流、负载谐波电压或它们的组合，本文对不同的控制策略进行比较，最后得出理想滤波控制策略。

The voltage of active power filter can be controlled by system harmonic current, load harmonic current ,harmonic current of spur track, load harmonic voltage, or combination of them. Further more, a comparison research on different control strategies is put forward, the control strategy of ideal filtering is got ,and the system control strategy is determined at last.

HAPF的谐波电压可以受控于系统谐波电流、负载谐波电流、滤波支路谐波电流、负载谐波电压或它们的组合，本文对不同的控制策略进行比较，最后得出理想滤波控制策略，最终确定HAPF的系统控制策略。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。