查询词典 periodic

Using the generalized degree of A-proper mappings, the existence of periodic solutions for nonlinear vibration is established.

应用A-proper映象的广义拓扑度理论，对多自由度非线性振动系统周期解的存在性给出了严密的数学基础。

It may be periodic or nonperiodic, i.e., it may or may not exhibit a regular period of repetition.

它可能是周期性或非周期性，那就是说，它可能或者可能不呈现一规则的周期的重复。

In this paper, the precise parameters of transmission properties of the periodic defected ground structures and nonperiodic defected ground structures are obtained on the basis of FDTD analysis.

本文针对周期性缺陷接地结构和非周期性缺陷接地结构的传输特性进行了FDTD数值分析，得到了它们精确的传输特性曲线。

We find that the behaviors of charge density wave parameter and spin density wave parameter of nonperiodic Hubbard model are similar with behaviors in periodic Hubard model, and the distribution of.

本文对一维非周期的赫伯德模型和非周期的横场中量子伊辛链的量子相变和量子纠缠以及保真度进行了系统的研究。

Expansion of the wavefunction ; Boundary conditions ; Periodic function ; Nonperiodic function

波函数的展开；边界条件；周期函数；非周期函数

The spectrum analysis of periodic signals has some difference with the spectrum analysis of nonperiodic signals.The DFT result of nonperiodic signals indicates the spectrum density on frequency Ω,and is continuous.

一般信号的DFT结果表示该信号在频率Ω处的频谱密度，它是一个连续信号，周期信号的DFT仅表示它的基波及各次谐波的幅值，是一个离散信号。

This paper shows the mathematic models and the calculation methods of the transient simulation in port equation form with full consideration of the periodic part and the nonperiodic part of the short circuit current and put the transformer, transmission line and the infinite power source in consideration. In resistance style fault it has perfect flexibility.

本文在充分考虑到短路电流的周期分量、非周期分量及带有变压器、线路和无穷大电源的情况下，给出了端口方程方法的机网暂态仿真研究数学模型和求解方法，结合电阻型故障模型，使故障仿真具有很强的灵活性。

Finding Cycles: Periodic and Nonperiodic.

寻找周期：周期的和非周期的。

By using the continuation theorem of topology degree theory and properties of nonsingular M-matrix, we obtain sufficient conditions for the existence of positive periodic solutions of this system.

利用拓扑度理论中的连续定理以及M-矩阵的性质获得了该系统正周期解存在的充分条件。

Since the solutions of this problem are the critical points of the associated energy function. One generally needs some compactness such as PScondition or C-condition to prove the existence of critical points of the energy func-tion, but when we study the elliptic equation in R~N, the compactness condition does not always hold since the imbedding of the Sobolev space H_0~(1,2)into L~(2*) is not compact. In this chapter, based on the nonsmooth critical point theory, and by using the approximation technique with periodic function, the existence of nontrivial solution is obtained.

由于该方程的解就是其所对应的能量泛函的临界点，通常都要在一些紧型条件的基础上来证明其所对应的能量泛函临界点的存在性，但当我们在无界域上考虑该椭圆方程解的存在性时，Sobolev空间H_0~(1，2)到L~(2*)的嵌入非紧，从而导致所对应的能量泛函失去紧性，本章在非光滑临界点理论的基础上，应用周期逼近的方法证明该问题非平凡解的存在性。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。