利用包络函数、二级近似概念和对偶理论，提出了一种结构优化的有效解法。
An efficient solution method for structural optimization is proposed by coordinated use of mathematical transformation, two level approximation concepts and dual theory.
据此幅值谱和一个随机相位谱，并与一个时程包络函数结合，合成一个子震时程。
A time history is synthesized from this amplitude spectrum and a random phase spectrum, combined with an envelope function.
因此，研究实际地震动时程强度包络函数的特性，对合理模拟地震动时程具有重要的意义。
So studying of the envelope function of the practical ground motion acceleration records is very important.
谱强度与归一化光场强度和相对论因子乘积的平方均成正比，载波包络函数使光场中电子运动的时间和空间周期减小；
The spectral intensity was proportional to the square of the product of normalized light field intensity and electronic relativity factor.
这函数描绘出位移曲线的包络。
This function describes the envelope of the displacement curve.
声频谱包络的特点和音管的传递函数有相应的关系。
The envelope of sound spectrum is related to the transfer function of bore.
利用包络形状函数方法测定了宁夏地区介质品质因素Q值。
Using the method of the form function of the envelope, the Q-value of crustal media in the Ningxia region is determined.
介绍了几种常用滤波窗函数的特点，给出了包络图和幅度响应图。
The characteristic of several filtering window functions giving the charts of outline and scope response is introduced.
最后，推出了信号的复包络自相关函数。
And finally, the Auto Correlation of complex envelope signals are deduced.
所得脉冲包络为时间的双曲正割函数。
The pulse envelope we obtained is a hyperbolic secant function of time.
该方法通过判断图像局部灰度包络曲面是否具备二维高斯函数曲面特征实现红外弱小目标检测，不需要进行传统的背景预测。
Instead of traditional background prediction, this method detects infrared small and dim target by judging whether the local grey level surface possesses the two dimension Gauss function feature.
在此基础上，建立了基于二次抛物线形抗剪强度包络线的功能函数。
On such a basis, a performance function based on the shear strength envelope curve in the shape of quadratic parabola was established.
液化面作为累积剪切功的函数，从初始应力点的包络线开始，随着循环活动性的进行，逐渐接近破坏线。
The liquefaction front, originating from the envelope of initial effective stress points, gradually approaches the failure line as the cyclic mobility proceeds as a function of plastic shear work.
第五部分，首先对适应性企业战略协同机制进行分析，然后利用数据包络分析方法和隶属度函数对快递企业战略协同度进行了评价。
The fifth chapter firstly analyzes the synergetic mechanism, and then evaluates the degree of the express enterprise strategy based on DEA and fuzzy membership function.
第五部分，首先对适应性企业战略协同机制进行分析，然后利用数据包络分析方法和隶属度函数对快递企业战略协同度进行了评价。
The fifth chapter firstly analyzes the synergetic mechanism, and then evaluates the degree of the express enterprise strategy based on DEA and fuzzy membership function.
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