查询词典 differential coefficient

A direct method is implemented for computing the free-term coefficient and the Cauchy principal value integral in the higher-order boundary element method for potential flow.

采用直接数值计算方法计算了势流问题高阶边界元方法中的自由项系数和柯西主值积分，建立了波浪与结构物作用的一种高阶边界元方法。

Then the boundary element integral equation of interior and exterior form is deduced in detail, also the form with corner coefficient. The significance for numerical calculation and principle of the singular integral is analyzed, and a non-isoparametric transformation method is presented to calculate weak singular integral and Cauchy integral, the method presented provides us a very simple way to computer the two kinds of singular integral of Helmholtz boundary integral equation, and it is easy to program in computer. After the difficulty of the calculation for multi-frequency of Helmholtz boundary element is explained, a method named SECHIEF (Series Expansion Combined Helmholtz Integral Equation Formulation), which is focused on the computational efficiency, is presented.

对结构声辐射的边界积分方程的内部形式与外部形式进行了详细的推导，给出了角点系数的计算方法与边界积分方程的形式，在此基础上，分析了奇异积分产生的原理及其对数值计算的重要性，提出了一种计算奇异积分的非等参(来源：Ae8a8BC论文网www.abclunwen.com)单元的变换方法，该方法给Helmholtz 声学边界积分方程中的弱奇异积分与Cauchy 奇异积分的计算以及编程提供了极大便利。

Numerical experiments are carried out to examine the computation accuracy and convergence speed of the method for the free-term coefficient and Cauchy principal value integration.

对截断圆柱上的波浪作用力与解析解做了对比，发现本方法具有很高的计算精度，随网格的加密迅速收敛于解析解。

The coefficient of variation of the second caulis and spread length reached 27.6% and 22.1%.

而第二主茎长度变异系数是27.6%。伸展长度变异系数22.1%。

On the base of introduction of circular cavity eigenfield and its reflection coefficient,the self-consistent field description of whispering-gallery mode in circular cavity is discussed.

在引进圆腔特征场及其反射系数的概念基础上，讨论了圆腔回音壁模的自洽场描述。

The effect of plasma densities and plasma collision frequencies on the field amplitude,field phase and reflection coefficient of the cavity is computed and analysed.It is clearly shown that the absorption of plasma to microwave is increase...

数值计算结果表明，在一定的等离子体密度下，随着等离子体碰撞频率的提高，等离子体对微波场的吸收增大，此种开放式的结构可有效地在腔中形成有利于微波等离子体产生的驻波场。

Numerical simulations indicate that, for specific coupling coefficient and cavity length value, the DFB lasers; are more sensitive to optical feedback than the Fabry-Perot semiconductor laser.

从分析的结果中可以得出，满足一定参数条件的分布反馈激光器比一般的F-P腔的半导体激光器对外部光反馈更加敏感。

Moreover, we discussed the effect of the unsaturated gain coefficient, the cavity damping rate, ratio of the atomic injection rates and atomic exit rate on the area of destabilization that can lead to producing LWI.

第四章讨论了在自发辐射诱导相干的影响下，探测场的增益对探测场和驱动场间的相对相位φ的依赖以及粒子的退出、注入速率和非相干泵浦速率等参量对增益有无反转的影响。

For the multi-layer absorber composed of perforated plate, composed of perforated plate and cavity, composed of perforated plate, porous absorption material and cavity, the absorption coefficient is theoretically calculated.

论文回顾了主动消声、吸声降噪的发展历史与现状，阐述了主动吸声降噪有待解决的关键技术问题，提出了论文的主攻目标和研究内容。

In co-revolution disc cavity, heat transfer coefficient which is high on most region of disc surface show that the co-revolution avails the heat transfer on disc surface.

但在出口处出现大面积"倒流"，盘腔外端的温度较高，这与流动参数和出口面积的大小有关，有待进一步研究。

Summary In copyright infringement cases,if the alleged infringer uses or even plagiarizes the copyrighted works or parts thereof,which causes no substantially adverse effect on the normal exploitation of the work,nor does it inflict any substantial damages to the right owner,the de minis doctrine should be applied to exempt the liabilities of the defendant and seek the balance of interests between the right owner and the general public embodied by the copyright law.

在侵犯著作权案件中，如果被控侵权行为人虽未经著作权人的同意，使用甚至抄袭了受著作权保护的作品或作品的片段，但若情节轻微，未对该作品的正常使用产生任何实质不利的影响，亦未对权利人的权利造成实质性的损害，则应适用&不计琐细原则&，免除行为人的责任，以寻求在权利人利益与著作权法所体现的社会公共利益之间的平衡。

This new product will become our best seller.

这个新产品会成为我们最畅销的产品。