查询词典 sum

An infinite series that results in a finite sum is said to converge. One that does not, diverge s.

一个无穷级数可求得和便称为收敛级数，若否，则称为发散级数。

Hence, reproducing kernel function has not only the advantage of calculation, e.g.it can transform the integration into the sum of finite function values, but also theadvantage of local characteristic of wavelet function.

所以再生核函数既具有计算优势，如能将积分计算准确地转换成有限个函数值的和来计算，又具有小波函数的局部刻画优势。

Based on Collins integral formula and the expansion of the hard aperture function into a finite sum of complex Gaussian functions,the approximate analytical expression of the diffraction field of Gaussian beam by a circular disc is derived,and its characteristics are analyzed by the numerical calculation and numerical simulation.

基于圆孔光阑函数展开为复高斯函数和的方法，用Colins积分公式，导出了高斯光束照射下圆盘衍射的光场近似解析表达式，经计算机数值计算，对高斯光束照射下圆盘衍射的衍射特性进行了详细的分析

K_ωby a finite sum of finite products of Toeplitz operators on L_α~2, and define the operator L_ω.

K_w表示为有限个Toeputz算子乘积的有限和形式，同时定义了L_a~2(D~n~⊥上的算子L_w。

The product of Fourier series and a finite sum of complex Gaussian functions is used to approximate the window function of a hard-edged aperture, an improved algorithm for the beam propagation through a paraxial ABCD optical system with hard-edged aperture is proposed.

使用傅里叶级数与有限个复高斯函数之和的乘积作为硬边光阑的窗口函数的近似式，提出了含硬边光阑近轴ABCD光学系统对光束变换的改进算法。

This paper provides the analytic method to calculate the value of Green s functions in space domain at the zero distance by the discrete complex image theory,that is ,to express the finite progressional sum of Green.

对此，本文在讨论采用离散复镜象理论计算空间域Green函数时，提出了采用该镜象理论计算空间域Green函数零距离处奇异值的解析方法，即，采用Taylor公式展开镜象理论得到的空间域Green函数的有限级数和形式，并结合特定的分域基函数来得到零距离处Green函数奇异值的解析计算式进行计算。

By substituting a definite integral for the sum of finite slices, an analytical formula for the safety factor in the simplified Bishop's method can be derived.

针对简化Bishop法，采用精确积分代替有限条块的求和，获得了边坡安全系数的解析表达式。

The detected leakage signal can be decomposed into a sum of finite intrinsic mode functions by EMD, some of IMFs embracing typical AE characteristic can be selected to be reconstructed. Thus, noise interference can be eliminated. The reconstructed signals are analyzed and their cross-correlation parameter is calculated.

该信号分析方法将管道泄漏产生的声发射信号通过EMD分解为多个平稳的固有模态函数之和，选择包含声发射特征的若干IMF分量进行重构，可以提取到管道泄漏声发射信号的本质特征，消除噪声信号的干扰。

With aperture expanded as the sum of finite complex Gaussian terms, a more practical approximate analytical solution of fractional Fourier transform of Gaussian beam in an apertured paraboloid refracting system is obtained and also numerical investigation is presented.

通过将孔径函数展开为有限项复高斯函数之和，得到了高斯光束在受孔径约束的抛物面折射系统中分数傅里叶变换较符合实际的近似解析表达式，并进行了数值模拟。

Then the detected signal was decomposed into a sum of finite intrinsic mode functions by empirical mode decomposition. The normalized kurtosis value of the main IMF components was analyzed, and the eigenvectors of the detected signal could be extracted.

用动态压力变送器获取了管道的动态压力信号，利用经验模态分解的方法将信号分解为多个固有模态函数之和，选择主要的IMF分量进行归一化峭度分析，从而提取信号的特征向量。

The production moved off-Broadway to New York City, where she won the Joseph E. Calloway award for her performance, and was profiled in American Theater Magazine as one of ten young theater artists to watch.

生产提出过百老汇的新的纽约市，在那里她赢得了约瑟夫calloway奖，她的表现，并于异型在美国的战区杂志之一， 10战区的青年艺术家观赏。

It's a risk tradeoff, and I believe that adding test support code usually wins.

这是一个风险的权衡，我相信添加测试代码通常会占上风。