近似计算

The angular distribution of the bistaticscattering coefficient of HH polarization were obtained by numerical implementation. Influences of the permittivity and the mean layer thickness of intermediate medium, friction velocity and the frequency of the incident wave on the bistatic scattering coefficient were discussed. The basic characteristics, the zonal characteristics and the characteristics with varying of frequency of the scattering coefficient from stratified sea surface were obtained. The numerical results show that the scattering coefficient has approximate "quantization" characteristics.

通过数值计算得到了HH 极化双站散射系数随散射角的变化曲线，讨论了中间介质介电常数和厚度、摩擦风速和入射波频率对双站散射系数的影响，得到改进的一维分形分层海面散射系数的基本特征、分区特征和随频率变化的特征，结果表明散射系数近似具有"量子化"特征。

In light of the practical needs of production and practical experience,an approximate mass calculation is offered under the above measuring conditions.

根据生产实际需要和实践经验，提出了在以上测量条件下的一种近似质量计算法，用该法对液化石油气的质量进行计算，精度可以满足液化石油气交接计量的要求。

Based on force characters of the model, authors put forward the mathematical expression of approximate deformation curves and compared calculation curves with measured curves.

基于模型的受力特点，提出了近似变形曲线的数学表达式，并将计算曲线与试验观测曲线进行了比较。

Random fuzzy optimal design ; multiple random fuzzy factor ; approximate measurement ; practical calculation.

随机模糊优化设计；多随机模糊因素；近似测度度量；实用计算

It is mathematically strict without any differential approximate calculation and is supposed to obtain the maximal precision of the floating-point operations of computer.

在数学上也严格成立，数值编程计算不存在差分近似，精度达到了计算机浮点运算的极限精度。

For a system with time delay, a approximate formula for calculating the residual servo variance is derived.

对于存在时间延迟的自适应光学系统，推导了计算大气湍流控制残余方差的近似公式，并给出了有探测噪声情况下确定系统最优控制带宽的公式。

It is an improvement of previous approximate solution, and the formula in this article can be used in numerical calculation and simulation of atmospheric electric parameters in the future.

该文的工作是对以前相关工作仅能得到近似解的一种改进，同时本文所得公式可用于今后对大气电参量进行相关的数值计算及模拟之中。

If the apparent field of view is known,''' the actual field of view can be calculated from the following approximate formula

如果已经知道视视野，'''实视野可以经由下面的近似公式计算

In the process of radiation calculation in the real atmosphere, the exactly integrating over the zenith angle is computationally expensive, and thus the diffusivity factor is used to approximate to the integration over the zenith angle.

在大气辐射传输计算过程，对天顶角的精确积分非常费时，可以通过漫射因子近似方法进行简化处理。

A general formula for computing the OTF of a defocused optical system is derived from the Kirchoff diffraction integration under an approximate condition which is weaker than the Fresnel condition.

本文从基尔霍夫衍射积分公式出发，在弱于菲涅耳条件的近似下，以高斯像面的像差量及系统的离焦量为参变量，导出了便于计算离焦光学系统的OTF的普遍算式。

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。