近似方法

Usually, they are suitable to mixed crystals with metallic bond but not to those with covalent bond or ionic bond.

上述近似方法通常适用于金属键混晶系统，但对于共价键或离子键混晶系统计算结果则不理想。

When the approximate method is of the characteristics of convergence and stability, the solution to the equation is certain to meet the point-by-point Lipschitz condition.

当近似方法同时具备收敛性和稳定性时，方程解必然具备逐点Lipschitz条件。

The technique gives analytical formulae for the noise performance of inductively degenerated CMOS low noise amplifier circuits with an ideal gate inductor for a fixed bias voltage and nonideal gate inductor for a fixed power dissipation, respectively, by mathematical analysis and reasonable approximation methods.

针对定偏置电压下理想栅电感和定功耗下的非理想栅电感两种情形，利用数学分析和合理的近似方法分别进行了详细的讨论，给出了简洁而有效的分析设计公式。

In this paPer, lattice dynamics of a monatomic chain arestudied by employing the method of multiple scales combined withquasi-discreteness aPproximation.

本文，我们主要通过引进多重尺度，并利用准离散近似方法对单原子链中的晶格动力学作了一些研究。

More and more numerical calculations are focused on the minimal requirements for a dynamical model whether or not Fourier's heat conduction law holds.

我们运用发展的Ford-Kac-Mazur平均场近似方法对与两个热源相连的一维FPU晶格链的量子热传输特性进行了研究。

Based on rain drop size distribution data measured in Qingdao, Guangzhou and Xinxiang, the radar reflectivity factor Z for spherical rain drops, the radar reflectivity factor Z〓 and differential reflectivity Z〓 for oblate ellipsoid rain drops have been calculated.

基于雨致交叉极化理论，提出了雨致交叉极化的二阶小变量近似方法以及新的雨致交叉极化预测模式，与其它模式和实验数据比较表明，该模式更能反映波的极化特征，较其它模式有一定的改进。

The XXZ model with the longitudinal magnetic field can be exactly solved by the Bethe ansatz method, but the similar rigorous solution has not been found in the case with transverse field.

尽管如此，通过Jordan-Wigner 变换，用一种修改了的平均场近似方法，我们可以较为准确地描述这一系统的整个基态相图。

Semiclassical approximation has comprehensive applications in modern physics.

在现代物理学中，半经典近似方法有着广泛的应用。

Making use of Tight-binding approximation, plotting isoenergic surface about S state electron of simple cubic lattice in first Brillouin zone in MATLAB soft.

利用紧束缚近似方法，在数学软件MATLAB中绘制简立方晶格S态电子在第一布里渊区的等能面。

Making use of Tight-binding approximation,plotting isoenergic sur face about S state electron of simple cubic lattice in first Brillouin zone in M ATLAB soft.

利用紧束缚近似方法，在数学软件MATLAB中绘制简立方晶格 S态电子在第一布里渊区的等能面。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。