一级近似

本文把Hencky的薄膜解当作外场解的一级近似解，并求出了外场解的二级近似解。

In this paper , Hencky 's membrane solution is used for the first approximation in outer field solution , and then the second approximate solution is obtained .

实际计算结果表明用高级近似计算代替一级近似解是必要的。

The calculated results show that it is necessary to use the high-order approximate algorithm to replace the first approximation .

关于一级近似Tc级数解的收敛问题

Note on the problem of the convergence of the first order approximate t_c series solution

计算ā～x曲线在一级近似下与实验曲线良好一致。

The theoretical a-x curve appears to agree with experimental one also very well to the first order of approximation .

（H^）的本征方程的一级近似（n1s）（n2p）组态的求解过程

The Solution Finding Process for the structure Sate of First Similar ( n_ls ) ( n_2p ) of ( H | ^ ) eigen Equation

并通过实例计算，比较了这种方法得出的解与Bessel方法一级近似解之间的误差。

The error between the solutions of this method and Bessel 's method is derived through numerical examples .

应用到三维情形，最低级近似得LJD结果，一级近似得Taylor结果。

In the three-dimensional case , the lowest order approximation leads to Kirkwood 's result , and the first order approximation yields Taylor 's result .

对于简单四方晶体中奇异螺型位错，一级近似与Peierls模型结果巧合。计算了fcc和bcc两种晶系中各种位错的自能和等效位错内切半径，并初步考虑了各向异性弹性效应。

For the case of singular screw dislocation in simple orthogonal crystal , the first order approximation coincides with the result of Peierls model .

而慢过程在零级近似下是地转风，流场具有水平无辐散性质，在一级近似下是类似Rossby波的慢波，运动满足位涡度守恒的条件。

Under the first approximation , there exist the slower waves as Rossby waves and their motions satisfy the condition similar to that of potential vorticity conservation .

弹性圆板在一侧受均载而四周固定的条件下不用Kirchhoff-Love假设的一级近似理论（Ⅰ）

The First Order Approximation of Non-Kirchhoff-Love Theory for Elastic Circular Plate with Fixed Boundary under Uniform Surface Loading (ⅰ)

对π脉冲宽度的误差与频率偏置效应引起的TOSS谱的残余旋转边带进行了分析，证实了相位循环方法能够在一级近似下有效地抑制这种残余旋转边带。

An analysis has been made on the residual sidebands in TOSS spectra caused by the errors in π pulse widths and the resonance offset effects , from which it can be concluded that phase cycling can efficiently suppress these residual sidebands to the first order .

通过对NiAl和MC的不同晶面的共价电子密度的分析发现：（110）NiAl和（100）MC在一级近似范围内基本上保持连续；

Comparing the covalent electron density of MC with NiAl at different crystal planes , it is found that the electron density along the interface ( 110 ) _ ( NiAl ) / / ( 100 ) _ ( MC ) is basically consistent in first-class approximation ;

此外还研究了禁带中心区的透射率，给出了中心频率附近透射率的一级近似解析解，并由此定性讨论了Fabry-Perot腔的谱线宽度和品质因子。

Furthermore , the transmittance in the central region of the band gap is studied , and the formula of transmittance near the central frequency with the first approximation are deduced . The spectrum line width and quality factor of the Fabry-Perot cavity are qualitatively discussed .

本文将Davis的量级分析方法改用匹配渐近展开方法，作为一级近似推导出了高超音速化学反应粘性激波层方程。

In the present paper , the method of matched asymptotic expansions is introduced to the Davis ' viscous shock layer theory , and the result of the first order of approximation leads to the same hypersonic chemically reacting viscous shock layer equations as with the Davis ' method .

基于HELMAN-ABELES模型，超越传统的一级近似，对磁场相关库仑阻塞下体系的磁输运性质进行了系统的理论分析。

This work is based on the HELMAN-ABELES model and we exceed the traditional first-ordered approximation to systematically analyze magnetotransport properties with spin-dependent Coulomb gap .

衍射问题一级近似的微扰理论

The perturbation theory for the first-order approximation of the diffraction problems

假一级近似中的误差问题

The Error Problem in the Pseudo First - order Approximation

本文并采用微扰法求出了方程的一级近似解。

The solution to the first-order approximation is found by the perturbation method .

一级近似表明了引力场的影响。

The first order approximation shows the influence of gravity on the process of spherical piston .

方程（4－198）给出了一级近似下的固有振动频率的改变量。

Equation ( 4-198 ) yields a first approximation for the change in the natural frequency of vibration .

虽然采用的是一级近似计算，但计算结果表明，这种方法简单易行，在工程实用中是足够精确的。

Though the first similar is used but calculations indicate that this method is simple and exact in engineering .

从波动方程出发，导出频率改变的一级近似公式。

A formula of the frequency change has been deduced from the wave equation to the first order approximation .

在有关量子跃迁的问题中，含时微扰理论给出了跃迁概率振幅的一级近似解。

In some problems in quantum transition , time-dependent perturbation theory gives the first order approximation of transition probability amplitude .

分析证明：二级近似项只有参考价值，而一级近似则是完全正确的。

An analysis shows that the2nd order of approximation has only a value of reference , whereas the1st order of approximation is accurate .

结果表明，非线性模型较之于线性模型是对真实层状介层的更高一级近似。

The result shows that the non-linear model should be rather more approximate to the true bedded media than that of the linear one .

结果表明原来的三参数几何亮点模型是在高频情况下未敷瓦壳体的一级近似。

The results show that the former geometrical highlight model with three parameters is approximation of one order for naked shells at high frequencies .

并根据试验数据，通过热激活扩散方程，在本试验的条件下，以一级近似计算了硼原子的扩散激活能。

According to the experimental data by the heat activation diffusion equation , we have calculated approximately the diffusing activation energy of boron atom as first level .

与文献[12]不同，本文在每一级近似中，应用伽辽金方法求出各级近似解。

Unlike Refs . [ 12 ] - [ 14 ] , for every order of approximation the approximate solutions are achieved by applying the Galerkin method .

最后数值计算的结果表明，当攻角和空泡数充分小时，本文结果可作为一级近似。

The numerical calculations show that when the cavitation number and the angle of attack are sufficiently small the results may be used as the first approximations .

球状弹性均匀地球模型是地球的一级近似，本文给出计算该地球模型固体潮应力场的计算方法。

Homogeneous spherical elastic earth model is the first approximation of the real earth in the approach to study the earth tide , this paper gives a numerical .