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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。

Matlab Application of different boundary conditions of Bessel equation calculation of the source.

应用matlab对不同边界条件下的贝塞尔方程进行计算的源程序。

Referring to Bessel function,a calculation equation of temperature distribution in the surface and heat-flow density of wax deposit layer in the laminar flow is deduced,as well as temperature distribution inside.

通过对试验环道上测试段相关数据的测试，对比分析测试段管壁有沉积物和无沉积物时测试段管壁内温度分布的不同表达式，根据能量方程建立了无量纲温度分布方程，利用贝赛尔函数推导出原油在层流状态下沉积层表面温度分布、沉积层热流密度、油流温度分布等相关温度场的计算公式，为研究蜡沉积规律，定性分析管路结蜡层厚度和制定合理的清管方案奠定了理论基础。

Analysis compared with different expression of temperature distribution on deposition and non-deposition in the tested inside-wall of pipeline,a nondimensional temperature function was founded to get a conclusion according to energy equation.Referring to Bessel function,a calculation equation of temperature distribution in the surface and heat-flow density of wax deposit layer in the laminar flow is deduced,as well as temperature distribution inside.This method provides a theoretic basis on the theory law o...

通过对试验环道上测试段相关数据的测试，对比分析测试段管壁有沉积物和无沉积物时测试段管壁内温度分布的不同表达式，根据能量方程建立了无量纲温度分布方程，利用贝赛尔函数推导出原油在层流状态下沉积层表面温度分布、沉积层热流密度、油流温度分布等相关温度场的计算公式，为研究蜡沉积规律，定性分析管路结蜡层厚度和制定合理的清管方案奠定了理论基础。

In this paper, based on the Bessel function, an Ordinary Differential Equation was derived for time-domain Green function and its gradients in this paper. A new efficient calculation method based on solving ODE is proposed.

在探索求解精度和计算效率的矛盾中，提出了结合求解常微分方程的节点制表、节点间插值的快速计算Gre en函数的方法并据此开发了一套三维深水时域Green函数的数值计算程序。

The biggest merit in this paper is its enormous programs. These programs are worked out for the calculation of anisoteopic propagation constant, imaginaries Bessel function etcl.

另外，本文在前人工作的基础上，对实际跨孔雷达偶极天线的特性进行了深入研究，得到了许多有价值的数据和图件。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷