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The problem of PI controller design for the multi-input and multi-output system is transformed to that of static output feedback controller design via the new state variable. As to the problem of the static output feedback, a new LMI-based sufficient condition of the controller is presented in this thesis. We can gain the multivariable PI controllers just solving one LMI inequality. The numerical example is provided to illustrate the proposed design approach. 3.The H_∞ robust control is able to solve the multivariable problem, also the control problem characteristic of the modeling error, parameters uncertainties and unknown perturbation, Its application research in the power electronics is beginning now. Considering the characteristics of the PWM DC-DC converters, a multivariable PI controllers which is based on H_∞ Performance Index is designed.

通过构造新的状态变量,可以将输入输出系统的PI控制器设计问题转化为静态输出反馈控制问题,利用后者的成熟理论来设计控制器;本文在问题转化后采用更为简便的算法,只需通过求解一个LMI不等式,就能求取基于H_∞性能指标的变量PI控制器参数,实例验证了算法的有效性。3.H_∞鲁棒控制具有处理变量问题的能力,可解决具有建模误差、参数不确定和干扰未知系统的控制问题;它在电力电子学中的应用研究刚刚开始。

A device that has a number of input lines of which not more than one at a time may carry a signal and a number of output lines of which any number may carry signals, there being a one to one correspondence between the combinations of the output signals and the input signals.

具有条输入线和条输出线的一种设备,输入线中一次最只有一条线载有信号,但输出线中可有个线载有信号。输出信号和输入信号的组合之间存在一一对应的关系。

As the Internet grows up,new communication needs such as one-many data transfer applications arise,and there are three choices of multicast communication models.We present some simulations of Pure-Unicast, IP Multicast,and Application-Level multicast over Internet-like topologies.

摘要随着网络技术的不断发展,尤其是媒体应用需求的增加,出现了一对的组通信需求,针对互联网上的大规模一对数据分发问题,有三种可选的通信模型,分别是纯单播, IP 组播,应用层组播。

L Transmitter and receiver is used in pairs in the same channel, and it is also allowed to use in one-many way in the same channel (one transmitter sends signal, several receivers receive in the same channel; it is synchronous and accurate to receive, which is equal to wireless video distributor), or it is also allowed to use in the many-many way (one transmitter occupies 1 channel, and supports 4 channels of video and audio transmission at the very most, which causes no cross fire one another).

l 发送器和接收器在同一信道内成对使用,也可在同一信道内以一对方式使用(一个发送器发送信号,同一信道内个接收器接受信号,实现同步精确接收,作用与无线视频分配器等同),或以的方式使用(一个发射器占据一个信道,最同时支持4信道的音频视频传输,互相不影响)。

The first plurality of acoustic drivers and the second plurality of acoustic drivers may be ordered so that each pair of the first plurality is separated by one of the second plurality.

可以对所述个第一声学驱动器和所述个第二声学驱动器排序,使得所述个第一声学驱动器的每一对被所述个第二声学驱动器中的一个分开。

The more you learn, the more you know, The more you know, the ore you forget.

学的越,知道的越,知道的越,忘记的越,忘记的越

In order to solve the problem that the Multi-objective Evolutionary Algorithm used in reactive power optimization currently has the shortcomings of time consuming computation, poor orientability and applicability,a ε-omination based MOEA was applied in reactive power optimization.According to different significance among objective components, an adaptive ε-omination was created and relevant post-evaluation fuzzy logic controller was established to select solution.

针对目标无功优化方法存在寻优时间过长,优化结果针对性不强以及难以实现自动实时控制的问题,将一种基于ε-支配域的目标进化算法应用到目标无功优化的求解中,根据目标模糊评价函数各目标分量的不同重要程度,构建出自适应ε-支配域,生成相应的后评价模糊控制器以实现优化结果的智能选择。

Interpretations vary only concerning to what extent we find shortages in some areas ; to what extent dynamic and long-term views of economic , technological , and social needs might justify an expansion beyond the current demand for graduates ; to what extent uncertainties about the future demand an "overeducation" risk policy ; and to what extent rationales other than labor market demand should be taken into consideration as well .

不同的解释唯一关注的是我们在大程度发觉某些地区的紧张;动态的和长远的经济、技术、和社会需求的观点在大程度上超出对毕业生当前需求的扩大;未来不确定的因素在大程度上需要一个"过度教育"的风险政策;以及理性的而不是劳动力市场的需求在大程度上被考虑在内。

P The more you learn, the more you know, The more you know, the more you.

你学的越,就知道的越;你知道的越,就忘的越

In this paper algorithms based on wavelet packets for multiresolution data fusion are proposed, which are efficient and highly parallelizable.

小波变换的尺度特点非常适合尺度信号的处理,可以用于分辨率传感器数据融合。

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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

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。