Longitudinal vibration of an integral pile in an uniform soil with end bearing boundary or elastic bottom boundary undergoing vertical harmonic load is theoretically investigated.
分别对均质土中完整端承桩和弹性支承桩在垂直谐和激振力作用下的纵向振动特性进行了研究。
It is well-known that fractional integral operator is one of the important operators in harmonic analysis with background of partial differential equations.
众所周知，分数次积分算子是调和分析中以偏微分方程为背景的一种重要算子。
This paper improved the harmonic current detection method based on UPF (unity power factor), using the slipped window integral to replace the LPF (low pass filter).
本文对基于单位功率因数的谐波电流检测方法进行了改进，用移动窗积分法取代检测中常用的低通滤波器。
These disadvantages could be eliminated in three-phase systems if the energy account based on the integral of the active power of the positive sequence component with the fundamental harmonic.
在三相系统中，以正序基波功率的积分作为计量标准，同样可以消除这两方面的不利影响。
These methods can't be used not only to analyze the non integral order harmonics, but to distinguish the eccentricity and the first harmonic, and contain the lager nonlinear error.
这些方法不能分析非整次谐波，不能区分一次谐波和偏心分量，并且含有较大的非线性误差。
After the numerical solution of the integral equation, the dynamic response of the pile subject to harmonic horizontal load can be obtained.
通过数值求解所得的积分方程，得到单桩在水平简谐载荷作用下的动力响应。
By using the method of spherical harmonic, the boundedness of a kind of singular integral operator in product domains is given in this paper.
用球调和的方法研究了一类乘积空间上奇异积分算子的有界性，所获得的结果给出了以往奇异积分算子有界性的应用。
The integral relationships of time-harmonic electromagnetic field vector are given, the effective sours of radiative fields is Studied, then some examples are calculated.
给出时谐电磁场矢量的积分关系式，探讨了辐射场的有效源，并应用于几个实例的计算。
Using Circle Diagram Analysis, the following conclusion can be obtained: To filtrate an integral order harmonic the sampling frequency must be the integral multiples of 4.
利用圆图分析法可得出采样频率需为4的整数倍才可滤除整次谐波的结论。
The time-harmonic responses of the system are first calculated by using an integral formulation of an ideal crack model.
两种不同频域方法的一致结果，证明了理想裂缝模型解的正确性。
The time-harmonic responses of the system are first calculated by using an integral formulation of an ideal crack model.
两种不同频域方法的一致结果，证明了理想裂缝模型解的正确性。
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