查询词典 bifurcations

Fourth, we have developed a new hybrid control strategy by combining state feedback and parameter perturbation for controlling period-doubling bifurcations and chaos in discrete nonlinear dynamical systems.

4提出了参数调节和状态反馈的混合控制新方法，有效地实现了离散非线性系统的倍周期分岔控制和混沌控制。

Because of switching actions, power-factor- correction Boost converters are essentially piecewise smooth nonlinear systems, which leads to the occurrence of fast-scale bifurcations.

由于开关的动作，功率因数校正(power-factor-correc- tion，PFC) Boost变换器本质上是分段光滑的非线性系统，从而导致快时标分岔的产生。

Use numerical simulation method to simulate the multi-parametric combination resonance condition for the system, analyse the periodic value, bifurcations and chaos of the system.

并对系统多重参数组合共振情况进行数值模拟，分析了周期解、分岔和混沌问题。

By analyzing the distribution of the roots of the characteristic equation according to Rouche theorem, the stability condition of this dynamical system is investigated and Hopf bifurcations are demonstrated. The bifurcation graph can be obtained and some simulation examples are shown.

利用儒歇定理及其推论分析了该动力系统特征方程根的分布情况，进而得到该系统解析解稳定和Hopf分支存在的条件，画出了分支图，给出相应的数值例子。

ABSTRACT Bifurcations, structural stability and voltage stability for power systems have been investigated in this thesis.

本文主要研究电力系统的分岔、结构稳定性和电压稳定性问题。

Melnikov method is employed to study the bifurcations and chaos of homoclinic and subharmonic orbits for two pendulum systems.

用Melnikov方法研究具有弱阻尼与参数激励的单摆以及倒摆运动的同宿轨道分岔、次谐分岔和混沌现象，得到了发生同宿轨道分岔、次谐分岔和混沌的临界参数，并将所得理论结果与倒摆运动的实验结果进行了比较与讨论。

In Chapter 2, we first introduce the related content of vector field, degenerate equilibrium and its bifurcations.

在第二章，我们首先一般地介绍了向量场、退化奇点及其邻域内发生的分岔等相关内容。

The results show that,the control of delaying period-doubling bifurcations and unstable periodic orbits in a chaotic attracter of the AOB system is effectively realized,and other stable periodic orbits 2np、3mp and 2np×3mp are obtained by adjusting the control parameters.

仿真模拟显示，通过选择恰当的控制参数，有效地实现了声光双稳系统中倍周期分岔的延迟控制和混沌吸引子中原不稳定周期轨道的稳定控制，同时，还可以将系统控制在2np、3mp 和2np×3mp这样其它任意所需的周期轨道上。

According to the analysis of the variation expectation value, species differentiation time in the CH4 sub-region phylogenetic tree, we found that Chinese sturgeon and the theoretical common ancestor of the other five sturgeon form the first bifurcation of the tree, while, among the five left, Amur sturgeon and Huso sturgeon, Russian sturgeon and Siberian sturgeon, Siberian sturgeon, Sterlte itself form another three bifurcations respectively.

通过对CH4区序列氨基酸变异期望值，物种分化时间及物种间系统进化树等参数的分析，将克隆的5种鲟鱼IgH恒定区序列与已发表的西伯利亚鲟同源序列比对后发现：西伯利亚鲟与俄罗斯鲟、施氏鲟与欧鳇、小体鲟各构成一个分支，并与中华鲟相对。

Objective To investigate the feasibility of using CT image-based computational fluid dynamics to simulate numerically the local hemodynamics in anatomically realistic human stenosed carotid bifurcations.

目的探索以CT图像为基础构建动脉血流动力学模型的技术方法，对颈动脉狭窄局部进行计算血流动力学（computationalfluid dynamics，CFD）数值模拟。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。