扰动

Appearance of the disturbance is related to the growth strength, moving speed and location of the typhoons.

扰动的出现与台风发展强度、移动速度及地理位置有关。

It is worthwhile to make further study of the cause and mechanism of anomalous tremors before the Wenchuan earthquake.

汶川大地震的&震前扰动&产生的原因和机理值得我们去进行深入的探讨和研究。

The Burgess Shale was deposited at the base of this cliff, probably in anoxic conditions, as indicated by the lack of bioturbation burrows, trackways, etc.

的布尔吉斯页岩沉积在该基地的悬崖，可能是在缺氧条件下，如缺乏生物扰动，以及丰富的硫铁矿。

The design project for a broad frequency sweeping reflectometor applied to the measurement of electron density profile on HL-2A Tokamaks plasma is put forward.

给出了用於HL-2A托卡马克等离子体电子密度分布测量的扫频微波反射仪的设计方案；在两台微波信号源频率固定的情况下，可以对托卡马克等离子体芯部的电子密度扰动进行测量和分析。

This method has been used in HL-2A tokamak for analyzing the magnetic island structures.

在这种方法中，我们利用对等离子体内部扰动的可靠模拟并和Mirnov探针测量数据相结合来反演等离子体内部的磁岛结构，以及磁岛在等离子体中的演变过程，从而为撕裂模研究和抑制提供可靠的数据，对撕裂模研究具有重要的意义。

After years of research, direct method using transient energy function of power system has gotten important development, and has become the main method of time-fiend analysis. In chapter 2, basic theories of TEF method are introduced, and the EEAC method and its application in stability generator tripping control are discussed carefully. A lot of work still need to be done in order to make practical achievement.As a way to actualize this scheme, a new intelligent style under frequency and

多机系统频率动态过程是低频减载方案设计的重要依据，本文在原有线性化扰动模型基础之上，增加了发电机和负荷频率调节效应的影响，并进行了系统仿真研究**同时根据多机模型特点及仿真结果提出了一种基于多机系统的低频减载设计和整定新方案，与传统方案相比，该方案提高了低频减载性能及系统运行方式的适应性

This method uses the value of TEF as the assessment of system transient stability and subsequent power oscillation, and pulls the system back to its steady state most rapidly. New control strategy combines transient stability control and damping.

该方法以暂态能量值作为系统经受大扰动后暂稳控制和阻尼后续振荡的指标，使其尽快归零，能同时实现TCSC的暂态稳定控制和对后续功率振荡的阻尼。

In terms of each of these essentials, Lyapunov direct methods, transient energy function methods and extended equal-area criterion are critically compared in this four-part paper. This reveals the essence causes for why both Lyapunov direct methods and TEF methods cannot be applied to transient stability analysis of power systems.

由4篇短文组成的系列文章按照上述各要素，讨论了针对平衡点稳定性的李雅普诺夫法、将平衡点稳定性理论应用于有界稳定性的暂态能量函数法以及针对有界稳定性的扩展等面积准则这3种稳定性理论在大扰动稳定性分析中的应用。

O disturbed nickel carbonyl hydride species, monodentate formate species and bidentate formate species are possible intermediates in the methanation of CO〓, the bidentate formate speciea is most stable.

在CO〓加氢反应过程中，可能生成O扰动Ni羰基氢化物、单齿甲酸盐类和双齿甲酸盐类物种，后一物种能量最低。

Moreover,in this dissertation,a method ispresented to control safe basin with the fractal erosion,that is by the application ofthe weak parameter periodic perturbation with an optimal frequency to control thefractal erosion basin,and the analytical study shows that the essence of the methodis that the parameter periodic perturbation can be used to delay the occurrence ofhomoclinic tangencies.

并且在本文提出了一种对分形侵蚀安全域进行控制的方法，那就是应用具有最优频率的参数周期扰动对于已受到分形侵蚀的安全域加以控制，在理论分析中得到这种控制分形侵蚀安全域的方法实质上延缓了鞍点同宿相切的发生，同时考虑了外加噪声对控制后安全域的影响，得到这种控制方法具有很好的鲁棒性。

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