扰动

While reaching the Commemorate Square soon, a burst of perturbation taking place inthe information field, two flower girls are dashing from the conveyer belt on one side; stand beside me, the famous "Milky Way Fragrance"smell intoxicates people.

在快要到达纪念广场时，平静的信息场一阵扰动，两个卖花女从一旁上了输送带，站到我身旁，著名的&银河飘香&花气袭人。

When microgrid is operated in islanded mode, VSGs can be divided into non-frequency regulation units and frequency regulation units, the former can generate power and participates in primary frequency control according to dispatching to mitigate system frequency deviation due to disturbances; the latter can offer referential voltage of microgrid and use secondary frequency regulation to implement no-error frequency control.

微电网孤岛运行时，将虚拟同步发电机分为非调频发电单元和调频发电单元，前者既能按照功率调度指令发电，又能参与一次调频，缓解扰动情况下系统频率的波动，后者提供微电网参考电压，并利用二次调频实现频率的无差控制。

A new method for islanding detection based on active current disturbing is proposed in this paper.

本文提出了一种新的孤岛检测方法——主动电流扰动法。

The disadvantages of the conventional active frequency drift method in various load conditions are analyzed for islanding prevention.

本文详细分析了传统有源频率扰动法在孤岛效应发生时，在不同负载特性下并网逆变器输出频率的变化特点和不足。

The system can control the vehicle running in a constant speed automatically.Beca use of the strong non lin ear of the au to mo tive cruis e con trol system and f actors,such as ex ternal load disturbs and complicated running modes,the fuzzy self-ad justing PID c...

由于汽车巡航控制系统的强非线性，以及受外界负荷的扰动、复杂的运行工况等因素影响，该系统较适合采用模糊自整定PID控制方法，以保证系统具有良好的动态稳定性。

The control strategy can realize the inverse dynamic model, mitigates the disturbance, and ensures the system stability.

该控制策略能够实现被控对象的逆动态模型，同时保证系统能有效地抑制扰动，具有足够的稳定性。

Furthermore, as the oscillating frequency of the cylinder approach the natural vortex shedding frequency, because of the phenomenon of resonance in the channel flow, and the heat transfer rate is enhanced more remarkably.

此外，当圆柱振动的频率接近流场的自然振动频率时，会与管道内的流体产生共振的现象，此现象能够大幅的增加流体的扰动，并且扰乱管道内的流场以及温度场，产生较佳的热传增益。

Refuse is off-loaded either on undisturbed ground or on a prepared, tipping pad where it is pushed onto the working face in lifts from 16-30 inches in thickness and then compacted.

垃圾是 或者关于它在哪里已经推行的准备，付衬垫小费或者在未扰动地上发泄到上从厚度16-30英寸在电梯里工作脸然后紧密结合。

Its algorithm to recursively continue the source and receiver wavefields, which includes a wavenumber domain phase shift in a constant background medium followed by a phase correction in the space domain that accommodates lateral velocity variations, can tackle the effects of lateral velocity variations for imaging under complex overburdens.

其递归波场延拓算法包含波数域针对常速背景的相移处理和空间域针对横向速度扰动的相位校正，可以应对上覆地层速度横向变化对构造成像的影响。

The experiment result shows that this control method can improve the dynamic performance of the motor control system, which accelarates motor responds and restrains overshoots. For the step external disturbance, the system speed only shows a pulse fluctuation with a width of 0.1 s, and the amplitude is one half of that of PID controller.

实验结果表明，该控制方法显著地改善了电机控制系统的动态性能，使电机响应迅速而且没有超调；对于阶跃型外界扰动，系统的速度仅出现了宽度为0.1 s的脉冲型波动，且幅度比PID控制至少减小50%。

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