结构方程

In this course three-dimensional finite element method is used to calculate the stress and deformation of the metal structure.The influence coefficient method is adopted to obtain the expression between the load and the offect ,and form the limit state equation of all failure mode.Finally.corresponding reliability indices are obtained with the JC method under truncated distribution.

在此过程中，运用三维有限元计算了门机金属结构的应力和变形，采用影响系数法，建立起荷载与荷载效应的显式关系，进而建立了各失效模式的极限状态方程，再用可截尾处理的JC法求出相应的可靠指标。

Using Reynolds equation to derivate the formula for calculating bearing pressure distribution,then calculate pressure distribution of main bearing shell of tube mill on the basis of this formula.

本文用雷诺方程推导出计算轴承压力分布的差分公式；并以此为依据，计算管磨机主轴承轴瓦的压力分布；并为轴瓦的结构设计提出建议。

Secondly we notice that the general solution of the structural damping vibration equation includes a divergent item and found that the unstable numerical solution comes from it.

其次，本文注意到了结构阻尼体系运动方程的通解含有的发散项。

Redundant driving structure designed based on a new type of universal Cartesian serial-parallel manipulator, kinetics equations and Euler equations constructed, complete analysis of each jointed points of the moving platform carried out, inverse kinetics solution can be obtained with the given parameters, which include the position and orientation of the manipulator, applied force on the output shaft, parameters of motion of output shaft and connecting bar and sliding block, computer programming adopted to get the valid data and its figure, thus found the perfect show of this redundant driving structure compared to the primary mechanism without redundant driving.

对全新结构的万能直角串并联机构进行冗余驱动设计，通过建立动力学万程和欧拉方程，对机构的动平台各输入铰点处的受力状况进行了全面的分析，已知机构在给定空间位置和姿态下的输出端的受力、主轴的运动参数、连杆的运动参数、水平和垂直运动滑块的运动参数时，可以反向求解机构约动力学反解，通过计算机语言编程计算和绘图得至（直观有效的结果数据，由此得知冗余驱动在改善原机构的动力学特性方面的良好表现。

Firstly, the optical structure of the measurement region of the dual beam laser Doppler velocimeter is derived exactly based upon the wave function of Gaussian beam.

首先从高斯光束的波动方程出发，推导出双光束激光多普勒测速仪相干区域的光学结构及随被测体一起运动的微粒所散射的光波函数。

The shape and change of a wellbore trajectory vicinal to a given point were researched.

通过研究井眼轨迹上某测点邻近的结构形状及其变化规律，得到了测段内井眼轨迹的一般性方程，从而可以客观地描述和计算实钻井眼轨迹。

By introducing the temperature and acentric factor into the mixing rule of attractive part of the equation of state, a new expression was set up.

对状态方程的引力项混合规则进行了改进，将温度和表示物质结构的偏心因子引入引力项混合规则中的相互作用参数，建立了引力项相互作用参数表达式。

First, the mixing rule of temperature calculation equation was modified. The content and acentric factor of second component were introduced into the interaction parameter, and a new equation of critical temperature for mixture were set up as

对状态方程的引力项混合规则进行了改进，将温度和表示物质结构的偏心因子引入引力项混合规则中的相互作用参数，建立了引力项相互作用参数表达式。

Through the allometric relationship between two elements of citi...

利用异速生长关系和要素产出的弹性性质可将C D函数化为二要素形式，据此发展了城市结构的广义维数方程。

The data were fitted with the basic negative binominal model and the generalized estimation equation based NBM with 3 different working correlation structures.

利用基本负二项回归模型和分别基于3种作业相关结构的广义估计方程负二项模型对数据样本进行拟合。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。