问题的

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，可以将多输入多输出系统的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_∞性能指标的多变量PI控制器参数，实例验证了算法的有效性。3.H_∞鲁棒控制具有处理多变量问题的能力，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。

Three problems can be solved with Hidden Markov Model, they are matching, learning and decoding. In this thesis, we use HMM to develop a system to predict the stock price index. Specifically, we make Gauss distribution as our observation sequence density function.

本文应用隐马尔可夫模型中对于解码问题、学习问题、和识别问题的解决方案，构建包含三个状态的模型，对股票价格指数进行预测。

As well, ACA outperforms GA in performance on average. 2. Through the analysis and studying of Ant colony algorithm and Flow shop scheduling problem, a construction graph is introduced. Two ant colony algorithms are proposed and analyzed for solving the flow shop scheduling problem with the objective of minimizing the flowtime. The Initialization of parameters and updating of trail intensities and probability is described respectively and a newly local search technique is proposed. Last is the experiment and the comparison shows that the PACA performs better than the FACA in the case of relatively large-sized problems than in the case of relatively small-sized problems.

通过对基本蚁群算法的实现过程和流水调度问题进行研究，给出了求解流水调度问题的解构造图，提出了两种蚁群算法来求解以总流程时间最小为目标的流水调度问题-FACA 蚁群算法和PACA 蚁群算法，分别给出了FACA 蚁群算法和PACA 蚁群算法的参数初始化方式、相对应的信息素更新方法和概率分布规则，并提出了局部搜索模式，最后进行模拟试验，对这两种算法进行比较，试验结果表明：对于较大规模的问题，PACA 蚁群算法要优于FACA 蚁群算法，而对于较小规模的问题，FACA 蚁群算法优于PACA蚁群算法。

Four scores are reported for the ACT Mathematics Test: a total test score based on all 60 questions, a sub score in Pre-Algebra/Elementary Algebra based on 24 questions, a sub score in Intermediate Algebra/Coordinate Geometry based on 18 questions, and a sub score in Plane Geometry/Trigonometry based on 18 questions.

ACT 数学测试共包括4项成绩：基于全部60个问题的总分数，基于24个问题检测初等代数/初等数学的技能分数，基于18个问题检测中等代数/坐标几何的技能分数，以及基于18个问题检测平面几何/三角函数的技能分数。

In this paper,the general solution for plane problem of elastic mechanics in polar coordinate system is deduced by separate variable method.

用分离变量法推导出极坐标弹性力学平面问题的一般解，给出了问题的解答全貌，为解决各种具体问题提供了理论基础。

This OCVC problem was converted to a typical two-point boundary-value problem according to Pontryagin maximum value principle, and this TPBVP was a first order optimality condition which could be solved by Radau collocation method.

根据Pontryagin极大值原理建立该协调电压控制问题的1阶最优性条件，该条件是一个典型的两点边值问题。在此基础上采用拉道排列法求解这个两点边值问题。

In this paper we discuss the applications of weighted graph from three aspects including the shortest path problem,Chinese postmen problem,and match problem .

本文选取了赋权图应用的三个方面进行讨论，分别是最短路问题、中国邮递员问题和匹配问题的应用。

An ancient Roman official,appointed to be the chief administrator of a province after serving his term of office as praetor.

由于这一问题牵涉到许多财政和法律方面的问题，因此应给予财务总临"处理问题的权力"。

The numerical example shows the validipy and effectiveness in the analysis of the contact problem of tire/road interface by this approach.

轮胎 /路面的接触问题是一个强非线性问题，这决定了求解这类问题的复杂性和困难性。

This is, for China and other multiracial countries, very positive and may give some solutions for the future. In the introduction there is an explanation of the reason why I choose this title and also the questions about Switzerland in the field of present research and the meaning of those researches. The first part describes the formation of the community of Switzerland, and there I define the word "community" and the peculiarity of each member of this community, the time the Swiss people take to build this community. The second part describes this formation with more details like geographical problem, language differences, the psychological pugnacity for liberty, the practical art of neutrality and the freedom for religious behavior. Those themes prove the formation of the Swiss community. The third part contains the following topics: the international position of Switzerland and its stability, the balance of economic production, the foundation of the Swiss government and the charm of its feature. For those topics I use the economic, political and cultural angle.

全文分为瑞士多民族社会的形成，在这一部分中重点介绍了民族和民族共同体的界定，瑞士各民族的地理分布及主要特征，瑞士民族共同体形成的历史时间断限，在这一部分中特别提出了民族共同体的概念，为全文的行文打下一个概念基础；在瑞士民族共同体形成的表现部分中，共分为语言和地域差别问题的消弭，崇尚独立自由的心理素质的确立，中立外交政策的奉行，宗教多元化的制衡等几个小的部分，四个部分平衡并立，共同来论证瑞士民族共同体的表现；在瑞士民族共同体诞生的原因中，共分为以下几个部分，有瑞士特殊的国际地位与多民族社会的稳定，平衡发达的经济及其吸引力，多元政治体制的建构和灿烂文化和性格的魅力，也就是从政治、经济和文化三个角度对这个问题进行了阐述；在现代瑞士多民族社会问题部分中，有如下几个部分瑞士的外来人口在瑞士国家的生活状况，外来人口融合中的困难，以及瑞士民族共同体中其他的一些社会问题，主要探讨的是瑞士社会中的外国人的生活状况，以及在融合和同化的过程中的成功经验以及给整个瑞士社会带来的几个突出的社会问题；最后是对现代瑞士多民族社会问题的思考，也就是从和睦性，认同感以及民族平等政策三个角度中进行的分析。

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。