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basic flow patterns in 3 types of suction boxes are studied respectively by both numerical calculation and model test, and the essential hydraulic indexes are listed. the boxes, including elbow inlet, bell-like inlet and dustpan-like inlet, are usually applied for vertical pump of low head.

采用数值计算和模型试验的方法分别研究了低扬程立式泵装置常用的肘形钟形和簸箕形等三种形式进水流道的基本流态，给出了表达这三种形式进水流道水力性能的主要指标。

Introduces structure characteristics,designing calculation,material selection and heat treatment of belleville spring used for valve.

介绍了阀门用碟形弹簧的结构特点，设计计算，选材及热处

By comparison, the ray grouping method produce agreed fields with the finite-element ray tracing method implemented by BELLHOP. Furthermore, it is free of singularities and the calculation speed can increase by more than 30 percent.

声线分组法与现有由BELLHOP程序实现的有限元方法相比计算结果具有很好的一致性，并且能够避免奇异点的产生，同时解算速度可以提高30%以上。

The paper show the structure and function of each module of the grounding resistance calculation program which adopt BEM.

在文章中分层次地给出了采用边界元法计算大型水电站接地电阻计算程序的结构和每一部分的功能。

Based on the above model,the discriminant for the loading point of bending strength calculation was deduced.

最后基于上述计算模型，推导出齿轮弯曲强度计算力点的位置判别式。

By using elasto-plastic finite element calculation and three point bending test,the in-fluence of strength matching and crack depth on fracture properties are investigated.

利用弹塑性有限元计算和三点弯曲试验对不同裂纹深度、不同强度组配焊接接头试样的断裂性能进行了研究。

Results show 1 the total water requirement of the crops in the Jinghe Watershed is 740543.20×10^4 m^3, accounting for 41.58% of the total water requirement of the region; 2 of the two major groups of crops, grain crops are higher than cash crops in water requirement quotas; and among specific crops, vegetables, melons, rice and cotton are higher and sunflower, potato and benne are lower than other crops; 3 water requirement per hectare varies from county to county with the highest being 5682m^3hm^(-2), in Jingyang County, and the lowest 4022 m^3hm^(-2) in Dingbian County, averaged to 4 583 m^3hm^(-2), but the water requirement quota of a crop does not vary with the county, so calculation of water requirement quota of a county is closely related to its cropping structure; and 4 because of serious waste of water in farming, the actual water consumption in agriculture in the region is much higher than the calculated crop water requirement.

结果表明，泾河流域农作物需水量总计740543.20万立方公尺，农作物需水占总需水量的比例较高，为41.58%。粮食作物需水定额较经济作物高；就具体作物而言，菜、瓜类、水稻、棉花等需水定额较高，向日葵、薯类、胡麻等较低。各县单位面积需水量差异较大，平均值为4583立方公尺hm^(-2)；泾阳县最高，为5682立方公尺hm^(-2)，定边县最低，为4022立方公尺hm^(-2)。由于事先设定大多数作物的需水定额不随县的改变而改变，因此需水量与作物结构密切相关。农业用水浪费严重，使泾河流域农作物实际用水量远高于需水量的理论计算值。

Aiming at GPS kinematic positioning actuality and existent problem, the paper researches the theory method of GPS EPOCH-BY-EPOCH kinematic positioning and the basic function, configuration and use method of Bernese GPS Software Ms-Windows Version 4.2 software by the numbers. The paper studies the solution calculation way of using transcendental information to improve the whole circumference ambiguity.

本论文针对GPS动态定位的现状和存在的问题，系统地研究了GPS单历元动态定位的理论方法和Bernese GPS Software Ms-Windows Version 4.2解算软件的基本功能、结构及其使用方法，围绕利用先验信息改善单历元整周模糊度的解算方法进行系统的研究。

Based on Bernoulli equation,a trial calculation model for design of reaction area in an integrated air-lift inner circulation fluidized bed reactor is put forward.

基于伯努利能量方程，提出了一体化气提内循环流化床反应器反应区设计的试算模型。

Based on Bernoulli equation and laminar flow theory, the theoretical calculation formula of fluid viscous damper with double-guide bars style is established according to hydrodynamics theory.

2以伯努利方程和层流理论为基础，根据流体力学理论建立了双出杆型粘滞流体阻尼器的理论计算公式，并探讨了理论计算公式与实际应用之间产生差异的原因。

Salt is good, but if the salt becomes flat and tasteless, with what do you season it?

14：33 盐本是好的，盐若失了味，可用什么叫它再咸呢？

He reiterated that the PLA is an army of the people under the leadership of the Communist Party of China.

他重申，人民解放军是在中国共产党领导下的人民军队。