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Based on the foundation of the virtual prototype model of the medium-speed maglev train, using the mechanical dynamics and kinematics analysis software ADAMS, this paper expatiates on the following things. Firstly, it analyses the decouple of single magnetic bogie by the simulation and experimentation; secondly, adds the magnetic levitation control system to the single magnetic bogie model and simulates; thirdly, by simulating the motion of the train running on the different type of guideway, analyses the state of the train on the ramp and crankle;in the end ,this paper does a further research on how the magnetic levitation control system and guideway parameters affect the suspending gap when the train runs on the ramp and crankle .
论文在建立了中低速磁浮列车虚拟样机模型的基础上,借助于机械系统运动学及动力学分析软件ADAMS,首先从单转向架出发,仿真分析了磁浮列车单转向架的解耦能力;接着对单转向架样机模型进行了控制系统的仿真;然后对一辆整车在竖曲线和平曲线的运行在ADAMS中进行了仿真,分析了列车在坡道和弯道上的运行状态;最后对磁浮列车在坡道和弯道上运行时的系统性能进行仿真分析,进一步研究了控制系统和线路参数对磁浮列车悬浮性能的影响。
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With the principal of scientific outlook on development and linking theory with practice, this paper based on the situation of China and used some advanced experience abroad. It colligates economics, banking, management and demotics etc. This paper discusses performance evaluation system of a commercial bank from the feature and future tendency of banking. Four aspects had been included of this paper, principally.
本文将以科学发展观为指导,遵循理论联系实际的原则,立足于我国国情并适当借鉴国外先进经验,综合运用经济学、金融学、管理学和社会学等多种学科理论,对我国商业银行绩效考核的现状和发展战略作出系统和深入的研究。
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The main problems researched in the dissertation and achievements are as follows: The dissertation explains the science background and the theoretical and actual meaning of the task. The progress and the problems of the flow imaging technique are briefly explained. The advantages of electrical capacitance tomography are discussed. The paper discusses the formation and operating principle of ECT, and builds up the definite mathematical model by detail theoretical analyse, and establishes the Finite Element Model of the system by changing the finite boundary value problem of ECT into equivalence variation problem according to variation principle. On the basis of the FEM of the system, the paper builds the finite element model of the capacitance sensitivity field distribution and programs its finite element simulation software and proves the validity of the FEM of the ECT from different aspects. With the FEM and the qualitative analyse of the effect of each structural parameter of the capacitance transducer on its capability, this paper optimizes the structural parameters of the capacitance transducer, and obviously improves its capability. The compare of the simulated result with the static experimental result shows that the error of them is less than 0.9%.
其主要研究内容包括:阐述课题研究的学术背景及其理论与实际意义,概括总结出流动层析成像技术的发展现状和存在的问题,指出电容层析成像技术的优点;讨论电容层析成像系统的组成及工作原理,进行详尽的理论分析,以变分原理为基础,将ECT的有限元边值问题转换为等价的变分问题,从而建立系统的有限元模型;在系统有限元模型的基础上,建立敏感场的数学模型,编制有限元的仿真软件,并从不同角度证明电容层析成像系统有限元模型的正确性;利用有限元模型,定性地分析电容传感器各结构参数对其性能的影响,并对传感器结构参数进行优化设计,使其性能得到明显的改善。8电极ECT系统的仿真和静态实验结果的比较表明,它们之间的相对误差小于0。
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This paper comprises 4 chapters which carries out analyze and study on some typical cases, for example, the affair of Sun Zhigang, the affair that several person being cracked by a BMW car in Haerbing, the case of liuYong who is a cock of gangdom in Shenyang, etc. Therefore, this paper can systematically discuss the forming, developing, shape, character of Internet supervision by public opinion, and its influence on the consensus supervision of traditional media, and its co-operation with the consensus supervision of traditional media. In addition, this paper also discusses the current of consensus supervision, and how to pilot and regulate it in the Internet condition.
本文分为四个部分,通过对孙志刚事件、哈尔滨宝马车撞人案、沈阳黑社会头目刘涌案等典型案例的分析研究,从网络舆论监督的形成、发展、形态、特征,它对传统媒体舆论监督的影响,它与传统媒体舆论监督的互动与融合,以及网络环境下整个舆论监督的走势及引导等方面展开了系统地阐述。
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Our craftwork paper include: paper string, bumf braid, bumf cloth, paper straw, paper draw straw and so on. Various kinds of hats and bags which are made from paper, hemp, palm and straw are novel in style.
各种纸制品:纸绳、纸草、纸布、纸辫、纸拉拉草,品种繁多;各类纸、棕、麻、草工艺编织帽、包,款式新颖。
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Therefore, this paper discusses the influences of individual characteristic factors and training transfer climate on training transfer, discovers the key factors affecting training transfer and builds a new model of factors affecting training transfer. Accordingly, the paper can enrich and makeup the existing the research result of training transfer in favor of control the impedient factors affecting training transfer and improve the effect of trainees using knowledge and skills learned in trainings on the jobs in order to provide academic direction and practical reference. Firstly, the paper confirms the research instruments.
因此本文探讨个人特征因素和培训迁移气氛对培训迁移的影响,找出影响培训迁移的关键因素,建立新的培训迁移影响因素模型,从而丰富和补充现有的培训迁移研究成果,并且有利于控制影响培训迁移的障碍因素,最大程度地提高受训者的培训迁移效果,为以后的培训提供理论性的指导和实用性的参考。
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At first, this paper surveys nonlinear control and the applications of neural networks in control respectively. Then it studies definitions, mathematical descriptions and conditions of invertibility for nonlinear systems, which are used to analyze the feasibility of inverse system control method. Conclusions about the feasibility of inverse control and the realizability of αth-order inverse systems in engineering are achieved. Furthermore, this paper discusses the feasibility, structure and identification of neural network αth-order inverse system for general single-input single-output continuous or discrete nonlinear systems and various composite control methods based on the αth-order inverse. At last, as a part work of an actual project, this paper focuses on the design of neural network αth-order inverse control method for thyristor controlled series compensation in power systems and its effect in improving the stability of power systems.
本文首先分别概述非线性系统的控制与人工神经网络在控制中的应用;然后研究非线性系统各种可逆性的定义、数学描述及可逆性条件,并用于分析逆系统控制方法的可行性,得出有关逆系统控制方法可行性的结论,阐明一般情况下α阶逆系统才工程可实现;接着本文针对一般单输入单输出连续、离散非线性系统,研究神经网络α阶逆系统的可行性、结构与辨识以及基于神经网络α阶逆系统的各种复合控制方法,并给出应用例子;最后本文结合实际项目,针对采用可控串补的电力系统,设计神经网络α阶逆系统控制方法,研究其对提高电力系统稳定性的作用。
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In the research to demand of International reserves,first, according to the affective character of demand to transition of International reserves, choosing the decision theory of Markov and dynamic transition equation as basic model, the paper has set up two transition methods--- stationary matrix and dynamic matrix, the later matrix has improved the sensitive reaction to time and velocity. Second, combining with knowledge of linear algebra, the paper has analyzed and testified the positive associated relation between transition matrix elements on main diagonal and the convergent speed of system, and explained why international reserves transition embodies the character under new situation and why the transition process can be accelerated by the strike of international idle money. Third,on the quantitative calculating to elements of transition matrix,referring to multiplication theory and decomposing-composing method of system, the paper has transformed main three-factor deciding confidence of international monetary into detail modulus by comparing analysis measure,now the matrix has been decided.
在国际储备的需求分析研究中,本文首先选择马尔可夫转移方程作为基础模型,根据需求对外汇储备结构的影响特点,提出非定常转移矩阵变换方法,拓展了马尔可夫变换对时间和速度的敏感性;结合线性代数知识,分析证明了定常转移矩阵的主对角线元素值的大小与系统的收敛速度的正向关联关系,并利用结论解释了国际货币新动向下外汇储备转换表现出的趋势特点以及国际游资冲击对国际货币结构变化的加速影响;在转移矩阵元素的量化计算上,本文参考乘数理论和系统分解合成原理,采用对比分析方法把影响国际货币信心的三大要素综合量化为转移偏好系数,然后根据转移偏好系数确定转移矩阵的元素值,其中还分别具体给出了定常转移矩阵和非定常转移矩阵的计算方法及在变换中的使用方法,从而不仅在定量分析上应证了定性分析结论,而且反映了随时间变化的美圆、欧元、日圆的比例结构均衡过程。
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Based on lots of literature and information, this paper has engaged in deep studies and brought forth a new kind of matchboard cement concrete pavement. Firstly, based on the theory of elastic thin slab and elastic subgrade, this paper has discussed the strong points and weaknesses of existed mechanics models of cement concrete pavements. Then, integrating each model's strengths and considering the practical conditions, this paper has put forward reasonable simulating models as well as basic mechanics hypothesis.
本课题在大量文献资料和作者深入研究的基础上,提出了一种新型企口板水泥混凝土路面结构,具体工作如下:(1)根据弹性薄板和弹性地基板基本理论,讨论了现有水泥混凝土力学模型的优缺点,并根据本课题的实际需要,综合各力学模型的长处,得到合理的力学仿真模型,并给出其基本假设。
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Students were all done in full swing, at which time inevitably leads to mischief-making, iron and Kay broke into scattered on top of paper thrown on the ground throwing Bianhan "Tiannvsanhua, and Tiannvsanhua the" Then she scolded her not to, but would remain silent was to pick up the paper, iron, Kay said:"The squad leader threw paper, throwing papers of the squad."
同学们都干得热火朝天,就在这时不免有人捣蛋,铁凯把撒破的纸扔在地上边扔边喊"天女散花了,天女散花了"这时她不去骂她,而是,一声不吭得将纸捡起来,铁凯说:"班长扔纸,班长扔纸了。"
- 推荐网络例句
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Do you know, i need you to come back
你知道吗,我需要你回来
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Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.
1〕 杨银书,王祥生,李德昌。安徽省首次发现嗜群血蜱。
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Chapter Three: Type classification of DE structure in Sino-Tibetan languages.
第三章汉藏语&的&字结构的类型划分。