扰动

Based on X-filtered LMS algorithm and -filtered LMS algorithm adaptive inverse control, we use a new variable step size LMS algorithm. Adding little computation, variable step size LMS algorithm can result in fast convergence speed and low residual error simultaneously. The adaptive feedback control can counteract the beginning error of the system. The adaptive disturbance canceler can best erase noises and disturbances.

在原来的X-滤波LMS算法自适应逆控制和-滤波LMS算法自适应逆控制方法的基础上，引入了新的变步长LMS算法，在计算量增加不多的前提下，能同时获得较快的收敛速度和较小的稳态误差；引入自适应的反馈补偿控制克服了被控系统的直流零频漂移，使控制系统在初开始工作阶段快速收敛；还引入自适应扰动消除器，它能最大限度的消除扰动。

In particular,the phase function of the disturbance wave system is solved by uting the characteristic theory of partial differential equation and an expan sion of Orr-sommerfeld eigenvalue problem,insteade of using the disturbance model which was given previously.

其特点是。应用偏微分方程特征理论以及O－S方程特征值的展开，求解扰动波的相函数而不是预先给定扰动波的波动形式。

Besides, another reason of the heavy rain may be that the kinetic energy perturbation is released concentrically in South China.

在对大气低频扰动动能的分析中也发现，华南前汛期降水伴随着低频扰动动能在该地区的集中释放。

And the admissible filter can be found by solving a convex optimization problem with global convergence assured.

所设计的滤波器能够保证相对于所有能量有界的外界扰动信号，滤波误差系统具有一定的l2-l∞扰动衰减水平。

Firstly ,the degenerate parabolic equation with shif t element is regularized.

即证明扰动问题的解的极限(ε→0)是不含扰动项的退化抛物方程的解。

Because the slidingmode is designable and it is not concerned with the perturbation of theparameters of the structure and the varieties of the disturbance, thesliding mode is absolutely self-adaptive.

由于滑动模态可以设计而且它与控制对象的参数摄动以及外界的扰动无关，这使得滑模控制对外界扰动和系统内部参数的摄动具有完全的自适应性。

The problem of how the coherent structures in the wall region of a turbulent boundary layer could be excited by the disturbances from the outer region was investigated by using direct numerical simulation method.

应用直接数值模拟的方法，研究了湍流边界层近壁区由于外区扰动的作用而导致相干结构产生的问题·结果表明：在湍流边界层近壁区的上边界存在的速度扰动，可以在近壁区内激发出相干结构，从而完善了单个相干结构的理论模型

At last the results have been applied to the tracking problem of a class of mechanical systems with discontinuous friction term. Chapter 3 mainly deals with uniformly ultimate boundedness of a class of nonautonomous systems with discontinuous right-hand sides and corresponding perturbed systems (in the sense of Filippov solutions). The definitions of globally uniformly strongly ultimate boundedness and globally uniformly weakly ultimate boundedness of discontinuous systems and the definition of globally equiuniformly strongly ultimate boundedness of corresponding perturbed systems are presented firstly.

首次给出不连续系统全局强一致最终有界、全局弱一致最终有界的定义，以及针对于扰动系统的全局强等度一致最终有界性的定义，并基于非光滑的Lyapunov函数得到了不连续系统全局一致强、弱最终有界的Lyapunov定理和扰动系统全局强等度一致最终有界性的Lyapunov定理。

Based on the theoretical analysis of the disturbance effect during vertical drain construction, in this paper, probability analysis is adopted, and the impact of variability of parameters with larger uncertainty or discreteness on consolidation reliablity is analyzed, which is very useful in the design and construction of soft clay ground treatment.

本文在理论分析竖井施工扰动效应的基础上，采用概率分析的手段，对由扰动效应引起的不确定性或离散性较大的参数，分析其变异性对固结可靠性的影响，对于饱和软黏土地基处理的设计和施工具有一定的指导意义。

A control scheme for closed heat pump distillation is proposed based on steady state characteristics of distil- lation column.

结果表明，当系统出现扰动时，本文提出的热泵精馏控制方案能够使系统快速达到新的稳态，方案可行，且具有较强的抗扰动能力。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐