近似方法

A piece of aluminum plate is placed on the top of green sand inside mold for simulating experimental process of one-dimensional air pressure impact moulding.

采用型砂顶部加盖铝板的方法来近似模拟在有侧限一维条件下的气力冲击造型实验过程。

Since geostationary satellite s orbit inclination is equal to zero approximately,it will result in the ambiguity of satellite s orbit ascending node and the singularity of the normal matrix in the process of fitting.

针对静止轨道卫星轨道倾角近似为0，致使卫星轨道的升交点定义模糊，在数据拟合过程中会导致法矩阵奇异的问题，提出对卫星轨道进行轨道倾角变换拟合广播星历参数的方法，并获得较高的拟合精度。

To check its validation, relevant program has been developed with appropriate approximations, and has been used to calculate the test problems.

为了验证该方法的有效性，在一定近似处理的前提下，开发出了相应的程序，并计算了相关的问题。

Numerical approximations of equations too difficult to solve in any other way were evaluated with such machines.

用任何其他方法都难以解答的方程，可以用这样的机器来求其近似数值。

In this thesis, multimode network technique combined with staircase approximate technique is used to establish a mathematical model to analyze the leaky wave antennas based on NRD guide with arbitrary transverse crosssections.

论文首先利用多模网络方法结合阶梯近似技术构建了适合分析任意截面形状的NRD波导漏波天线特性的数学模型。

In the linear analysis, with the aid of the theory of random vibration, the formula for the deflections and the acceleration are carefully deduced, and a simple method is given.

本文的分析包括线性分析和非线性分析，在线性分析中，利用随机振动的基本理论，推导了结构位移响应和加速度响应的计算公式，并给出了响应的近似计算方法。

They are differentiated twice with approximate ideal differentiators to obtain the corrected accelerogram.

本文通过对数字强震仪系统使用的力平衡加速度计的仪器响应误差进行分析，提出了一个校正仪器响应失真的处理方法，即对未校正记录做低通滤波后运用近似理想微分器做两次微分得到校正加速度记录。

On condition that there exist weak excitations in the two-component BEC, the SO (3, 2) Lie algebraic description still work. The eigenstates and energy-gap equation have been obtained.

对存在弱激发的双分量BEC，SO（3，2）代数方法仍然近似有效，我们由此求得了系统的本征态和弱激发能隙方程。

Phase-lagged cyclic boundary condition is implemented by a novel method in conjunction with the developed sliding interface technique to accurately simulate the arbitrary pitch ratio rotor/stator interaction without any modifications of the physics of the problem. It's for the first time to compose the computational area into one structured grids including both rotor/stator of centrifugal or axial turbomachinery with arbitrary pitch ratio. This method can eliminate the iteration of boundary conditions on the sliding interface and calculate the unsteady flow within rotor and stator simultaneously.

为了能够在较小的计算区域内不改变叶型而真实地反映出任意栅距比时的内部非定常流场，并避免近似仍采用相位后滞周期性条件，结合本文发展的网格技术，给出了一种新的实施方法，首次将动、静叶片数不等的离心式/轴流式叶轮机械转子、静子计算区域组合在一套结构化计算网格中，动/静叶排间的滑移界面完全按内场处理，避免了每一时层内，滑移界面处边界条件的迭代计算；并保证了每一时层，滑移界面处流动参数的守恒特性。

Measurements are also carried out in various distances by moving detector to determine the collimated transmission using very thick sample based on the scattered transmission of tissue is isotropically distributed over all angles.

同时在验证大块组织体透射光亮度空间分布近似各向同性的基础上，理论上提出一种通过移动探测器测量大块组织体的准直透射率的方法，并进行了实验研究。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新