角系数

The spring constant, the mass, the constant of attenuation and the angular frequency of the exciting oscillation can be changed within certain limits.

弹簧振动的劲度系数、质量、衰减量和角频率可以在一定限度内被改变。

A formula was deuced, which shows the relation between the outlet angle of center line of channel and wrap angle, variant coefficient, if variant Archimedes spiral is assumed the curve of center line of plate plane. It is the basis for controlling outlet angle of channel.

推导了采用变异的阿基米德螺线作为平面流道中线时，中线出口角与包角和变异系数之间的关系式，为设计中控制流道出口角提供了依据。

Using SUSAN formed SIFT and ladder-image pyramid structure to achieve the same scale,new algorithm establish a unified set of over-determined equations of all match points.The over-determined linear equations coefficient matrix can be simplified to drop dimension,so simplify the structure of the augmented matrix and whose dimension is reduced to half.

研究了一种多目标识别算法，该算法用SUSAN角点形成SIFT特征点，采用阶梯图像金字塔结构实现尺度不变，为所有匹配点建立统一的超定线性方程组并对该方程组系数矩阵进行简化使其维数降低一半，得到增广矩阵。

The program developed with the formula enable the coordinates for points and the parametric formula for curves in the orthographic projection to be transferred into ones in the axonometric projection, which can be directly displayed on the screen. In addition, except for assigned different values to elastic coefficient of the axial direction and the angles of the axes, it is generally adapted in drawing any of the axonometric projections.

用它编程，可以把正投影中点的坐标或曲线的参数方程，转换成屏幕上能够直接显示点的轴测投影的坐标或曲线的轴测投影的参数方程，而且除了赋轴向伸缩系数和轴间角的大小、正负不同的参数值外，对绘任一种轴测投影和相应正投影都具有通用性。

Via sdrilared new mpe ERA resistCd l0 smooth steel Proectile perfOnnance test, the local protectwh coeffician calculated is 3.5l4, Which is Proved tha new tyPe ERA can camed ollt defend large calibre imourTiercing Proectile of init1al velocity is l700In/s in the case of small normal ange, and can achieve tactics technique gUide line, comPletely Anfil tank barbette debo large calibre annourrpiercing prOJecti1e request.

通过模拟新型反应装甲抗100滑钢弹的抗弹性能试验，计算其局部防护系数达到3.514，证明了所设计的新型反应装甲能够实现小法线角防御初速为1700m/s的大口径穿甲弹，能够达到战术技术指标要求，满足坦克炮塔对大口径穿甲弹的防御。

Base on incidence angle theory together with objective function with small design variable, computing time is reduced rapidly when Hooke-Jeeves method is applied in optimization design.

建立在转轮进口冲角理论基础上和以较少的权系数为设计变量的目标函数的Hooke-Jeeves优化方法极大地缩短了获取反击式优秀转轮所需的计算时间。

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。

With the help of this model, the influence of engines capability by some parameters such as compression ratio、coefficient of excess air and ignition timing can be estimated, and the influence factor was analyzed in this paper.

本文利用该模型预测了压缩比、过量空气系数、点火提前角等参数对发动机性能的影响并分析了这些参数对发动机性能产生影响的原因。

Based on the quasi-dimension combustion model, the emission model is set up in this dissertation. The NO emissions in different conditions of LPG engine can be simulated and calculated by the model. The calculated results show that the NO emissions are larger influenced by ignition timing and less influenced by compression ratio, finally, choosing a right coefficient of excess air will have great effect to reduce NO emissions.

本文在建立的准维燃烧模型基础上建立了排放生成模型，利用该模型对液化石油气发动机在变参数情况下NO的排放生成情况进行了模拟计算，计算结果表明点火提前角对NO的生成影响较大，压缩比对NO的生成影响较小，而选择合适的过量空气系数更是对降低NO的生成起着关键作用。

In the area where the intensity of the image is changed small the image is smoothed by the heat equation whose conduction coefficient is constant.

在图像的角点位置上，扩散速度趋于零，在线条点位置上，扩散速度由梯度的模值来决定，并在与梯度正交的方向上进行平滑；在灰度变化不大的区域上，采用传导系数为常数的热方程进行平滑。

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