数值计算

Some aspects in analysis of connecting rod with BEM are discussed.

对102柴油机连杆的小头部分进行了数值计算，结果表明二次等参边界无法用于柴油机连杆的应力分析是有效的。

The first chapter presents the significance and its values in the practice of the task. It briefly introduces the development history of BEM and its advantage. The main task of this paper is presented in the chapter.

第一章阐明了课题的研究意义和应用价值，简单介绍了本文所用的数值计算方法一边界元方法的发展历史和优点，同时介绍了本文的主要工作。

The light distributions in an erythrocyte with the shape of native biconcave,oblate spheroid,or disk sphere under the irradiation of a plane light of 632.8nm were studied with a numerical calculation method of finite difference time domain.

我们用有限时域差分的数值计算方法来研究用632.8nm平面光波照射双凹型，扁球体型或圆盘球体型红细胞后在红细胞内部产生的光分布。

It is possible to analyse nonlinear power system stability due to the development of the bifurcation and chaos theory and improvement of numerical techniques.

分叉和混沌理论的发展及现代数值计算技术的进步为电力系统中的稳定问题提供了强有力的分析工具。

Based on linear bending theory of thin elastic plate and fundamental solution constructed with the general solution principle of biharmonic equation, a meshless method was developed for establishing a computational format of numerical solution of thin plate bending.

基于弹性薄板的线性弯曲理论和重调和方程的一般解理论构造的基本解，建立无网格法求解薄板弯曲问题的数值计算格式。

The works in the project just done can be summarized as five respects.(1) A device was designed to fabricate the asymmetrical resonant cavities by a pendant drop. A series ARCs with variable parameters provides a valuable experimental method for investigating the characteristics of ARCs.(2) The relationship between the number of active modes and the shape parameters in an ARC was investigated. The experimental lasing threshold was compared with theoretical result, the good agreement between two shown that it was the decrease of the number of active modes in an ARC that decreased lasing threshold.(3) Dye lasing gain was used to enhance the signals of stimulated Raman scattering of the weak gain Raman modes in a circular cavity made by a pendant drop, the instantaneous SRS spectra of weak gain Raman modes in ethanol was obtained by this new method.(4) The SRS signals of minority compound in a binary chemical complex was obtained by using dye lasing gain method. The detection concentration of minority compound was reduced to an order compared with normal SRS method.(5) A cylindrical circular cavity was formed by a liquid jet, which was used to reduce the pump intensity required for laser induced plasma spectroscopy. The limit of detection of trace element in aqueous sample was greatly decreased by this new method.

我们设计并成功制作了使悬垂液滴连续变形的装置，用此装置可以方便地改变非圆对称谐振腔的几何参数，为ARCs的研究提供了一种有效的实验方法；研究了ARCs中活性模式数和变形参数间的变化规律，激光阈值的数值计算结果和激光辐射的实验结果作了比较，二者吻合的曲线说明ARCs中活性模式数量的减少是受激辐射放大阈值降低的原因；在由单元化合物构成的微型圆对称谐振腔中，首次尝试用"激光增益"增强弱增益拉曼模式的受激拉曼散射信号，获得了乙醇分子中弱增益拉曼模式的瞬态SRS光谱；在由二元混合物构成的微型圆对称谐振腔中，用染料的激光增益增强了少量化合物的SRS信号，把少量化合物的SRS信号探测浓度降低了近一个数量级，在SRS应用于瞬态过程的组份分析方面做了卓有成效的探索；用石英毛细管形成的稳定液拄构成拄形谐振腔，降低了激光诱导等离子体光谱需要的激励能量，有效地降低了水相样品的痕量元素分析极限，为LIPS应用于微量元素的化学分析开拓了一条新的技术路线。

Finally, a calculation example of Bingham oil was shown the numerical difference of the two methods.

本文以Bingham流体为例，对非牛顿流体的差分方法进行了研究，从理论上分析了势梯度分量差分方法的错误，并提出了正确的势梯度模差分方法，最后给出了显示二种方法差别的数值计算实例。

The bit error rate of the OOK and the bipolarity encoding scheme is analyzed with chirp and Johnson-Nyquist noise taken into account.

通过数值计算，比较了"1"和"0"都发信号的系统和只有"1"发信号的系统性能。

The Berreman matrix method is applied to determine the transmission and reflection characteristics of birefringent thin films.

采用Berreman特征矩阵方法，通过数值计算研究了双折射薄膜的反射、透射等光谱响应特性。

The bit after bit comparison arithmetic with the hypostasis of bisection method is applied to real-time image processing.

为了完成图像分割，文章通过一种逐位比较的算法以确定图像边界，该算法的数学本质是利用二分法进行数值计算。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新