近似计算

The approximate linear model of the three-string pendulum and its computational formula for the moment of inertia are discussed.

对三线摆的线性近似模型和转动惯量计算公式的由来作了简要说明。

A new computational formula to nonlinear adjustment by parameters, in consideration of the second-order terms, is derived in this paper from the precise orthogonality condition equations to nonlinear least squares by analyzing the direct solving process and iterative computing method of the linearized model.

在分析线性化的非线性参数平差的近似直接解法与迭代解法基础上，利用非线性最小二乘的精确正交性条件方程，推导出顾及到二次项的非线性参数平差的一种新的计算公式。

In this paper, the bootstrap lower confidence limit of reliability for stand - by system is studied; simulated calculation is made, The result shows that the bootstrap lower confidence limit of reliability for stand - by system is practical.

本文研究了贮备系统可靠性的Bootstrap 置信限，进行了模拟计算，结果表明贮备系统的可靠性的Bootstrap近似置信下限在实际中是可用的。

In the thesis, the fundamental formula of FFD method derives from the square root that is approximated by a continued fraction expansion in the one-way wave equation. Optimizations of the parameters of the finite-difference operator improve the validity of the method.

本论文用连分式近似单程波波动方程中的平方根导出FFD算法的基本公式，并对FFD算法中的有限差分算子进行了系数优化，进一步提高了计算的有效性。

Since all the bar textures as a whole constitute a continuous 3-D approximation to the scene represented in the original depth image,novel views can be obtained by mapping these bar textures in a from-back-to-fiont order.

由于各个像素的条纹理的集合可以构成源场景的近似连续三维表示，从而大大增强了源深度图像表达三维模型细节的能力，而且成像时不必进行空洞填补的计算。

Restricted by the assumption of low-order linear displacement approximation in each block, Discrete Element Methods often have to mesh many continuum parts of the problem domain into small discrete blocks when simulating crack propagation problems, and the result is very sensitive to the very way that divides the domain.

一般离散单元计算方法受离散块体低阶线性位移近似的限制，在模拟开裂过程时，需要将大部分实际上连续的区域离散化，离散方式对分析结果有显著影响。

It rotates the point set and calculates the extremum of X coordinate, and finally gets the Convex Hull of the point set.

它充分利用了成熟的数据库技术，能够在比较短的时间内计算出海量平面点集的近似凸壳。

In order to calculate the coulomb potential scattering, the path integral is investiged in momentum space .

在合理的近似下，通过在动量表象中计算路径积分，较为方便地求出了库仑散射的相移表达式。

Finally, the relationship between the radius of crevasse and the weight of dynamite is attained based on an energy balance. The solution compares well with experimental results.

利用近似的能量原理，得到了装药量与破口之间的关系，计算结果与试验结果吻合较好。

The governing equation of in-plane vibration of cable-restraint system is derived by means of D'Alembert principle, and then those partial differential equations are transformed into a set of ordinary differential equations by Garlerkin method. The method of Runge-Kutta integration is applied to solve the equation. The simulation analysis is made to prove that this vibration control has obvious damping effects and then the influence of cable tension, support mass, natural frequency and spring stiffness on the damping are discussed. Eventually, the approximate analytic solution of the optimum damping parameter is obtained to provide a simple and effective reference and design method for the engineers.

通过D'Alembert原理建立拉索－弹性约束系统振动方程，通过Galerkin方法将偏微分方程转化为常微分方程，应用龙格－库塔积分法求解方程；经过仿真分析，验证了该振动控制具有明显的减振效果，并且讨论了初始拉力、支座质量、振动频率及弹簧刚度对减振效果的影响；最后给出了计算最优阻尼参数的近似解析式，为工程师提供了简便有效的参考依据及设计方法。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。