动力系统

Now nonlineardynamical systems with parametric excitation are one of the most important systems intheory of nonlinear oscillations.

在非线性振动理论中目前最具有代表性的一类系统是含有参数激励的非线性动力系统，在这类系统中有着极其丰富和复杂的动力学行为，如分岔、分形和混沌振动等。

According to some concepts on symbolic dynamics and properties of minimal nonchaos on Sturmian System, a kind of subshift is made and it is generated by a nonperiodic recurrent orbit and study its properties.

利用符号动力系统的相关概念和Sturmian系统的极小非Li-Yorke混沌属性，构造了一类由非周期回复点生成含有周期点的子转移系统，并研究了其性质。

Using the lifting property of sequence entropy pair and sequence entropy pair for a measure, it is shown that for each system there are a maximal null factor system and a maximal M-null factor system.

使用拓扑序列熵对和测度序列熵对的提升性质，我们说明了每个动力系统存在最大的null因子系统和最大的M-null因子系统。

From viewpoint of systematology and complexity theory, the petroleum system is an open complex dynamic one.

摘要从系统学和复杂性科学上分析，含油气系统是一个开放的复杂动力系统。

A nonlinear semi-discrete model of investment dynamic system is set,and the existence and unique of solution for semi-discrete system are discussed.

建立了投资动力系统的一个非线性半离散模型，并讨论了半离散系统解的存在唯一性，给出了线性半离散系统稳定的一些充分条件。

Through the comparison between methanol synthesis process and ammonia synthesis process, the specific features of chemical production process with different product and their effects on integration of the polygeneration system are discussed.

首先概述了多联产系统集成的原则思路，分析了生产醇醚燃料和合成氨的两类化工系统的流程特点，指出了其对化工和动力系统集成的影响。

They can be a support for thedesigner to look insight of the vibration mechanism of the mistuned bladed disk, andto predict its forced response. Therefore, the researches of this dissertation canprovide fundamental theories for studying and designing the power systems of thenew high performance aero-engines.

本文的研究结论，不仅在很大程度上完善和发展了研究失谐叶盘系统振动局部化问题的基础理论，也为设计人员正确理解失谐叶盘系统的振动机理及准确预测其振动响应提供了有效的方法和手段：并为进一步研制高性能的叶盘动力系统打下了理论基础。

Then we find out the exact bounded wave solutions for WBK equation in chapter four. According to the theory of dynamical system, we investigate the explicit exact traveling wave solutions of nonlinear wave equations by using the characters of the closed trajectory connecting equilibrium points and the relations between obits and traveling waves.

在对系统进行定性分析、了解了系统所有可能解的大致形态的基础上，论文第四章给出了WBK方程的精确有界解，应用动力系统理论，利用连接平衡点的闭轨线的特点结合轨线与行波之间的对应关系来研究非线性波方程行波解的有界性及精确的显式表达式。

And the methods for studying the nonlinear dynamical stability are applied to analyze the nonlinear thermal stability of the thrust bearing.

并用研究动力系统稳定性的方法对推力轴承系统的热不稳定性进行了非线性分析，研究了系统的热稳定性。

The characteristic of this series leveler iS that it has adopted two national patent technologies:group driving plate levelling machine ZL200420001176.0 and axial decelerating motor leveler ZL200520007514.6.Each top roll is driven by a set of decelerating motor.and every two lower rolls are driven by a set of dynamic system,so that the line speed of each roll iS consistent with sheet metal speed of the contacting part,and it has solved the problems existing in traditional transmission system,such as friction between sheet metal and roll surface.and mechanical interference problem in the system And the working roll adopts spherical roller bearings which have little friction resistance.so this series leveler has such advantages as high levelIing quality,Iittle noise,low energy consumption and environmental protection.compared with traditional levelers.

该系列矫平机的特色之处在于：采用分组驱动板材矫正机(ZL200420001176.0)和一种轴装式减速电机矫平机(ZL200520007514.6)两种国家专利技术，每根上辊由一套减速电机驱动，每两根下辊由一套动力系统驱动，从而使各辊的线速度与所接触部位的板料速度相一致，消除了传统传动系统存在的板料与辊面之间的摩擦和传动系统内部的机械干涉问题，同时由于工作辊的轴承均采用轧机用调心辊子轴承，摩擦阻力小，因此，该系列矫平机与传统矫平机相比，矫平质量高、噪音小、能耗低、节能环保。

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。