控制理论

First of all, confirm the overall evaluating indicators and the base indicators of public transport network in Chinese large cities through repetitive comparison, discussion and consultation to relevant experts; among the base indicators in the overall evaluating indicators, composite the basic probability assignment of evaluation indicators with Dempster-Shafer Theory composition rule upon different experts' experiences and preferences of the expert group, and amalgamate the evaluations of different experts to further obtain the evaluation value of base indicators.

首先通过反复比较、探讨和征询有关专家的意见，确定大城市公交线网综合评价指标及子指标，在综合评价指标的子指标中，对专家组中不同专家的经验和偏好，用证据理论合成规则对评价指标的基本概率赋值进行合成，将不同专家的评价进行融合，获得子指标的评价值，然后通过突变理论将评价指标及子指标作为控制变量进行地面公交线网的综合评价，对北京市进行算例分析结果表明，该方法对大城市公交线网的综合评价是可行。

The result is important from both theoretical and engineering viewpoints because of its generality and constructiveness, so that from it we can chose many kinds of decoupling control law which can meet many other requirements such as stability and robustness for the closed-loop system.

此结果之所以在理论上，特别在工程上是重要的，在于它的构造性和一般性，因为它可扩大解耦控制律的选择范围，可使闭环系统在解耦的同时，更容易找到满足其它一些要求的解耦控制律，如稳定性、鲁棒性等。

In this thesis, a semi-classical model of the force on an atom is used to describe the motion of a two-level atom interacting with a standing wave laser field. The velocity dependent force and momentum diffusion are derived through optical Bloch equations by using the matrix form of the continued fraction technique. By investigating the dynamic properties of atoms in laser field, we can control and manipulate the mechanical motion of an atom.

本文利用半经典理论，从二能级原子在激光驻波场中所满足的运动方程出发，推导出密度矩阵元所满足的递推关系，利用矩阵连分数方法求解出密度矩阵元，从而求出依赖于原子运动速度的光压力与动量扩散系数，通过讨论原子在激光场中的动力学行为，为原子在激光场中被囚禁、形成原子列阵以及可控制的量子态，从而为量子信息处理提供理论基础。

It is not only a lifeline of military products, but also a key problem of research and production in navigation, guidance and control system domain.

本文的研究内容，不仅对诸如导航、制导和控制系统的研究和开发具有重要意义，而且对控制和提高产品质量均具有理论意义和实用价值。

The principle of fuzzy control and the structure and the design of fuzzy PID control are introduced.

本文首先论述了模糊PID控制的理论基础，介绍了模糊控制的原理及模糊PID的结构和设计。

The thesis can be divided into five parts as follows: First, the structural characteristics of finned-pipe evaporator are analyzed. After selecting suitable microelement controller, the heat-transfer and mass-transfer processes are analyzed for every microelement under the conditions of dryness, wetness and frostiness. Based on previous equations, some parameters of frostiness are confirmed and the frost-growing model is set up under frost condition. Some hypotheses are postulated and with the help of the equation of mass-conservation, energy-conservation and momentum-conservation, the evaporation model which fits in the dynamic simulation is built, which set a solid foundation for system simulation. Second, the starting and stopping behaviors under disturbed condition are analyzed and calculated by using the dynamic concentrative parameter model, which gives some advice to better prescribe refrigeration system and set theoretic foundation for carrying out automatic control of refrigeration system. Third, the normal running process is analyzed and calculated by means of rational matching theory, which gives some advice on how to better understand the parameter change under steady state and the affection of inlet-parameter on evaporator. Fourth, the simulation software with dynamic characteristic is designed, which can be applied to calculate thernio-parameter of cryogen, air humidity and frost thickness under different initial and boundary conditions, and to carry out dynamic simulation under conditions of dryness, wetness and frostiness, at the same time, to achieve detection and simulation at any stage from starting to stopping.

本文的主要内容如下：1对翅片管蒸发器结构特点进行分析，选取适当的微元控制体，就干、湿和霜工况下对每个微元分别进行传热传质分析，基于经验关系式确定霜的有关参数，对于霜工况下的霜生长建立模型，经适当假设，运用质量守恒、能量守恒和动量守恒方程建立适合动态仿真的蒸发器数学模型，为系统仿真奠定基础； 2对蒸发在大扰动下的开、停机过程，运用动态集中参数模型进行分析和计算，为更好地描述制冷系统运行的全过程奠定基础，同时也为制冷系统实现自动控制提供一定的理论基础； 3对蒸发器正常运行过程，运用动态分布参数和参数间定量耦合的观点来分析和计算，为更好地了解稳态工况下各点参数的变化情况及各入口参数对蒸发器动态特性的影响即蒸发器性能对各参数变化的敏感性； 4编写翅片管蒸发器动态特性仿真计算程序，可以计算不同边界条件和初始条件下的制冷剂热力参数、空气温湿度和霜厚度分布场，实现对翅片管蒸发器在干、湿和霜工况下的动态仿真。

It analyzes the change law of the velocity of the intelligent car with three omni-directional wheel triangular layout when it performs curvilinear motion and dual-path respectively,and the mobility of intelligent car in plane is tested.

分析了三轮Δ排列时，智能小车分别作曲线运动、双路径运动时各个驱动轮理论速度变化规律，验证了通用轮式智能小车平面行走的灵活性，并为控制智能小车完成特定运动提供理论依据。

By use of dynamic wave equation,the general slope flow equation is derived by matrix theory.

采用运动波方程，用矩阵理论推导出坡面流的一般方程，结合森林生态系统的功能，分析了坡面流的局部损失和总阻力，为研究森林控制非点源污染输移提供了理论依据。

Based on analysis of DTG's coupling character, its decoupling control method is studied, and decoupling method of diagonal matrix is determined to be used in decoupling control of DTG's pulse rebalance loop.

通过对转子运动过渡过程时期转速变化规律的理论研究与实验测试数据的分析、处理，为动调陀螺仪动基座启停控制单元设计奠定了理论和实验基础。

In the dietary control of hyperlipidemias, dietotherapy and herbal medicinal diet of TCM and nutrition therapy of western medicine have their own theoretical basis and methods.

中医的食疗、药膳及西方医学之营养医疗对於高脂血症的饮食控制各有其理论基础及方法，本文即在探讨两者间的异同之处，期能结合两者之优点以提供高脂血症患者更佳之饮食计画，对病情之控制能达最佳的效果。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷