形状系数

Several numerical examples for the two-dimensional impenetrable and penetrable obstacles with arbitrary shapes is given to demonstrate that the algorithm yields a reasonable reconstruction of the obstacle even when 10% errors are added to the Fourier coefficient of the far-field pattern.

以具有各种形状的二维不可穿透和可穿透障碍物的重构作为算例，进行了深入的数值研究，结果表明了即使在所用的远场分布的某一个Fourier系数中加入10%的随机误差，也能得到很理想的重构结果。

New multi—objectives function (including mill stand longitudinal stiffness, distribution coefficient of loaded pressure between rolls, weight of mill stand, rolling power, rolls loaded gap profile changeability of bending force, transverse mill stand stiffness of bending force, transverse mill stand stiffness of rolling load) multi—constraints (including rolls strength, spindle strength, backup roll bearing load, minimum rollable gauge, roll surface temperature rise) rolls system parameters optimization model of four—high cold strip mill is established, and programme for mill structural illustration creation on the platform of AutoCad designs is compiled. With this as basis, rolls system parameters of Yichang thin strip corporation's 1219 cold mill are calculated using SUMT (subsequent unconstrained minimization technology).

本文建立了以板形和板凸度控制特性为目标的四辊轧机多目标函数（包括轧机纵向刚度、辊间压力分布系数、轧机重量、功率、弯辊力对轧机辊缝形状改变能力、对弯辊力的横向刚度、对轧制力的横向刚度）、多约束条件（包括轧辊强度、接轴强度、支承辊轴承负荷、最小可轧厚度、轧辊温升等）的辊系参数优化模型，以此模型为基础，利用惩罚函数法计算了益昌薄板公司1219冷轧机辊系参数，编制了AutoCAD平台下的轧机结构示意图自动图形软件。

The article defines the generalized variation coefficient and puts forward a new kind of grey incidence model. This kind of model reflects the positive and negative relation of grey incidence degree to some extent. It is only relate to the geometric shape of sequences and has nothing to do with the spatial position of theirs.

首先定义了广义变异系数，并提出一种新的关联度计算方法，该关联度能够反映序列的正相关与负相关关系，并且只与序列的形状有关，而与它们在空间的相对位置无关。

The metrics include patch density, largest patch index, edge density, area-weighted shape index distribution, area- weighted fractal index distribution, mean Euclidean nearest neighbor distance dlstributlon,standard deviation of Euclidean nearest neighbor distance distribution, coefficients of variation of Euclidean nearest neighbor distance distribution, contagion, interspersion and juxtaposition index, cohesion, Shannon's diversity index and Simpson's diversity index.

根据生态区划计算描述中国陆地景观结构的13种景观结构指数，包括斑块密度、最大斑块指数、边界密度、面积加权斑块形状指数、面积加权斑块分维度、平均最近斑块距离、最近斑块距离的标准差、最近斑块距离的相异系数、蔓延度、分布邻接指数、结合度、香农多样性指数、辛普森多样性指数。

Five variables quantitative structure-biodegradability relationship model was established applying Kier's molecular connectivity indices and shape indices simulation analysis of the biochemical oxygen demand of 42 substituted aromatic compounds with activated sludge.

应用分子连接性指数及分子形状指数分析影响42种取代芳烃在活性污泥中的生化需氧量，建构了一个5变量的QSBR模型，其可决系数(R2)为0。

The effects of different parameters and cross-sections on axial velocity, the distribution of secondary flow, temperature field, turbulent kinetic energy, wall friction coefficient and wall Nusselt number are analyzed in detail.

详细分析了充分发展的和发展段的湍流管道内，不同截面形状和几何参数对轴向速度分布，截面二次流结构，湍动能，曲线管道摩擦比，温度分布和曲线管道Nusselt系数比等管道流动和传热特性的影响。

An optimization procedure is established to obtain location parameter of Weibull distribution, which corresponds to the maximum of the absolute value of the linear regression coefficient.

通过对线性拟合相关系数的最优化求解来确定Weibul分布的位置参数，再由最小二乘拟合便可估计出Weibul分布的形状参数和尺度参数。

2As for cement-soil of different dates or formula, it is shown by the results of testing that their macrophysics indices correlate closely with the structural indices. Moreover, the micro-structural change under the unconfined compression is revealed.

分析了不同龄期、不同配方下的水泥土样宏观力学指标与其微结构参数——平均结构因子' F 、各向异性系数 A 、平均形状因子' f 的紧密相关关系，同时揭示了水泥土芯样在无侧限抗压过程中强度破坏的内在微观机理。

The aim of this study was to provide original data for consideration of origin and evolution of Malus domestica and scientific theory of conservation and utilization of M.sieversii.

结果表明，①新疆野苹果的果实形状、大小、颜色和果柄长度等形态性状的变异系数均在10％以上，表现出较丰富的遗传多样性，3个居群的变异趋势基本一致。

Noll. From the irradiance distribution in two defocal planes, one in front of focal plane and the other behind, with a given detector array the elements of response matrix for each normalized term of Zernike polynomials can be obtained. For an incoming atmospheric disturbed random wavefront, with its irradiance distribution detected in two defocal planes and the response matrix, it is easy to solve the corresponding Zernike term coefficients of incoming wavefront and reconstruct the detected one.

Noll建议的Zernike多项式表征经大气扰动的入瞳处的光学波前畸变；求出由两个离焦面上的光强分布决定的归一化Zernike项在特定形状的探测器上的响应矩阵；由响应矩阵和入瞳处的波前在两个离焦面上的光强分布，求出其Zernike项的系数，从而实现波前的探测和重构。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了