半

A set of governing dynamic equations with different basic unknowns and with different hypotheses is presented. Thereafter, the 3-D non-axisymmetric governing dynamic equation is solved by means of Fourier expanding and Hankel integral transform method.

在Biot两相介质波动理论的基础上，直接用Fourier展开和Hankel积分变换技术分析三维非轴对称饱和弹性土层和饱和弹性半空间波动方程，首次得到用积分变换形式表示的，三维非轴对称饱和弹性土层和饱和弹性半空间，以饱和土土骨架位移和孔隙水压力为基本未知量的基本解。

Then, the differential equations are solved by the Fourier expanding and Hankel integral transform method. Integral solutions of soil skeleton displacements and pore pressure as well as the total stresses for poroelastic media are obtained. Furthermore, a systematic study on Lamb's problems in transversely isotropic saturated half-space is performed. Integral solutions for surface radial, vertical and tangentical displacements are obtained both in the case of drained surface and in the case of undrained surface excited by vertical and tangentical harmonic resources respectively. Numerical results show the obvious difference between the model of isotropic saturated poroelastic media and that of transversely isotropic saturated poroelastic media.

其次，基于Biot波动理论，在圆柱坐标系下求解了横观各向同性饱和土的Biot波动方程：通过引入位移函数，在圆柱坐标系下将横观各向同性饱和土的Biot波动方程转化为两个解耦的6阶和2阶控制方程，然后根据方位角的Fourier展开和径向Hankel变换，求解波动方程，得到以土骨架位移和孔隙水压力为基本未知量的积分形式一般解，并用一般解给出了饱和土总应力分量的表达式；再以基本解为基础，系统地研究了横观各向同性饱和半空间体的Lamb问题，考虑表面排水或不排水两种情况后，首次得到横观各向同性饱和半空间体在表面竖向和水平谐振力作用的下径向、竖向和周向位移的解析解。

Free semigroup is a very important branch of the semigroup.

自由半群是半群的一个很重要的分支。

The paper also analyses other single phase bridge half controlled rectifier with equivalent freewheel diode and draws work wave of each part, this can help to understand fundamental of this kind of rectifier.

对于另一种自带等效续流二极管的单相半控桥，文中给出了各部分工作波形，可进一步加深对单相半控桥的理解。

It was covered by the shadow of midnight, bathed in the moonlight that passed through the curtains of a French window.

深夜，闭上眼睛，如果你的心一片寂静，在半睡半醒间，你能看到它。

Half-an-hour before the kick-off, a frisson had run through the half-empty ground. Football\'s favourite Roman gladiator wandered out on to the pitch.

在开球前半小时，半满的球场内掠过一道凉气：足球界最受人欢迎的罗马角斗士踱入了球场。

Every Friday five crates of oranges and lemons arrived from a fruiterer in New York—every Monday these same oranges and lemons left his back door in a pyramid of pulpless halves.

每星期五，五箱橙子和柠檬从纽约一家水果行送到。每星期一，这些橙子和柠檬变成一座半拉半拉的果皮堆成的小金字塔从他的后门运出去。

Fucose composed of 40% the total carbohydrate with lesser but approximately equal amount of galactose, glucosamine, and galactosamine present.

对糖萼的糖化学组份分析表明糖萼是由40％的岩藻及大致等量的半乳糖，氨基葡萄糖和氨基半乳糖组成。

The fugacity of solid sulfur is computed by the semi-theoretical and semi-empirical approach.

其中，元素硫在固相中的逸度利用半理论、半经验的方法，硫在气相和液相中的逸度则用PR-EOS。

The model is a semi-empirical and semi-mechanical functional differential equation that contains both time-constant and time-dependent parameters that have clear practical meanings.

11建立了具有土壤水分胁迫历史后效影响的冬小麦生长模型，它是一个半经验、半机制的泛函微分模型，实现了水分胁迫后效影响的定量化。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！