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The book is divided into 14 chapters, including Introduction, continuous control system theory, process and discrete sampling, Z transform, sampled-data systems, discrete approximation of continuous system the equivalent, based on mathematical transform the classical design method, based on state space pole placement design methodology, multi-variable system of quadratic optimal control, quantitative effects, the choice of sampling period, the digital control system modeling, digital control system for a variety of design methods, variables quadratic optimal control systems, sampling cycle of selection, non-linear control of the problem, as well as digital control system, a typical application - Disk drive servo control design.
全书共分14章,内容包括概论、连续控制系统理论、采样过程和离散化、Z变换、采样数据系统、连续系统的近似离散等效、基于数学变换的经典设计方法、基于状态空间的极点配置设计方法、多变量系统的二次型最优控制、量化效应、采样周期的选择、数字控制系统的建模问题、数字控制系统的各种设计方法、变量系统的二次型最优控制、采样周期的选择、非线性控制的有关问题,以及数字控制系统的一个典型应用——磁盘驱动器的伺服控制设计等。
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WIMP-Based electronic teaching systems can not meet teachers' requirements of natural and efficient interaction, especially continuous drawing and writing in geometry teaching. In this paper, an intelligent pen-based whiteboard system for dynamic geometry visualization is designed and implemented.
计算机辅助教学系统目前已在教学中大量应用,然而,基于WIMP界面范式的电子课件系统,无法满足教师在课堂教学互动中需要与用户界面自然、高效、连续性交互的需求,尤其是几何教学中连续书写板书、自由勾画图形、动态几何定理演示等。
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A logicaldomain is used as a reference and the mesh movingis implemented according to an appropriate domain transformation.With sometraditional moving mesh methods,the meshes in physical domain may be tangled.To avoid this,the transformations are constructed based on harmonic mapping.Agood feature of the adaptive methods based on harmonic mapping is that existence,uniqueness and non-singularity for the continuous map can be guaranteed fromthe theory of harmonic maps.
在移动网格方法中,需要引进一个逻辑区域作为参考,网格的移动往往通过一个区域变换来实现,网格可能发生缠绕的问题是移动网格方法中一个一直没有解决的问题,我们利用调和映射来构造区域间的变换,使得变换的存在唯一生有了理论的保证,这就为避免网格缠绕打下了基础。
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Numerical methods based on the continuum hypothesis and molecule kinetic theory are performed to investigate the gaseous flow in the microchannels. The validity of different boundary conditions based on continuum model is examined by DSMC method under different Knudsen number. It is found that the impact of rarefied and compressibility effects are different.
针对微槽道中气体流动的特征,分别采用连续介质模型和分子运动模型简要分析了连续介质模型中不同滑移边界条件的适用范围,并总结出稀薄效应对槽道中压力的的影响和可压缩效应的作用趋势是相反的。
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First, we study the detection of human face contour in two aspects-no model based and model based.
本文首先研究了人脸轮廓检测的方法,包括无模式的和有模式的两个方面。
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Based on the principle of advance, adaptive, reliability, high efficiency and flexibility, the general configuration strategy and the key technology has been deeply analyzed and optimized with the systematic and community in general and adaptive and contraposition in detail. The harmonic in both respects has been realized technically and the contradiction between adaptive and community solved. With the synthetic developing tool based on the database, the CAPP system called synthetic development CAPP which is of the properties of synthetic, modular redeveloped and integrated has been developed.
本论文以提高系统的先进性和实用性以及高效,灵活为基本原则,对CAPP的总体构成策略及其关键技术进行了深入地分析和优化,宏观上充分体现系统性和通用性,微观上切实体现针对性和适应性,技术上实现二者的协调统一,较好地处理了适应性与通用性这对既相互关联、又相互制约的矛盾;采用基于数据库的综合开发工具模式,研究并开发了综合式、模块化、具有二次开发和一定集成功能的CAPP系统——基于数据库的典型零件CAPP综合开发系统。
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Family based system is almostfulfilled during the introduction stage of private enterprises,and it has contributed to capital accumulation outstandingly, butFamily based system has been unfit for the development withthe expansion of private enterprises.
民营企业在其创业初期采用的多是家族制企业制度,这种制度在我国民营企业的资本原始积累阶段,作出了突出的贡献。
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Based on SG3525A PWM control circuit and the study, based on the design of the hardware structure of wire.
本文在对PWM控制电路及SG3525A的研究基础上,设计的送丝硬件结构。
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PSO is a population-based optimization algorithm, which mimics the social behavior of animals in a flock. It makes use of individual and group memory to update each particle position allowing global and local search optimization. The objective function considered was the total weight of the structure subjected to stresses, displacements and forces constraints. The effects of the parameters were investigated as well and such combination of tuning parameters promote a better global search behavior avoiding premature convergence while rapidly converging to the optimal solution. Results showed the effectiveness of the proposed method by comparing with ANSYS Design Optimization Tool (zero-order method). The PSO with the tuning parameters makes it an ideal method for offshore wind turbines foundations optimization tasks.(2) A reliability analysis method for pile foundation bearing axial loads based PSOThe performance function of pile foundation's axially bearing capacity sometimes is nonlinear and complex, on the basis of geometric meaning of structural reliability index, an optimum model with PSO for structural reliability analysis under arbitrary random variables was established, The PSO algorithm is very efficient to solve global optimization problemsIts use in structural reliability field presents not only the advantage of its facility of implementation, but also the possibility to obtain the design point and the failure probability with a good accuracy. In addition, PSO is a zero order algorithm, for no derivative is necessary for its implementation.
本文的研究针对桩式海上风机基础结构的特点,在国内外有关研究成果的基础上对海上风机基础结构优化设计理论和可靠度方法一些相关问题进行了较为深入的研究,具体做了以下几个方面的工作:(1)基于粒子群优化的桩式海上风机基础确定性优化设计方法桩式海上风机基础的优化设计是一个复杂的、非线性约束的优化问题,针对传统的基于梯度信息的优化方法在处理非线性问题中易陷入局部最优解的问题,本文将一种耦合惩罚函数的PSO算法引入到海上风机基础结构概念设计中,PSO算法是从群体动物聚集觅食这一活动中受到启发而发展的,该算法利用个体和群体的信息共享不断改进自身的位置从而进行局部和全局最优搜索,本文中以桩和三脚架连接段直径及壁厚为设计变量,以基础总重量作为优化的目标函数,在给定的约束条件下建立了三脚架基础优化数学模型,另外本文还研究了PSO参数变化对结果的影响,协调的参数组合可以避免陷入早熟收敛而能够快速的获得全局的最优解,通过与ANSYS优化模块的计算结果比较验证了该方法的有效性,本方法为海上风机基础的确定性设计提供了一条有效的途径。
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An optimal path planning algorithm of the observer is proposed in this paper, which is based on the dynamic programming. Based on the data measured at the current stage, the optimal moving direction of the observer at the next stage is calculated aiming at the maximum area of the target feasible region convergence.
该算法在当前测量时刻所测数据的基础上,以目标位置可行域收敛面积最大化为目标,分析出观测站运动到下一测量时刻的最优运动方向,从而达到缩短定位时间和抑制定位误差的目的,实现整个测量路线的最优化。
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- 推荐网络例句
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However, as the name(read-only memory)implies, CD disks cannot be written onorchanged in any way.
然而,正如其名字所指出的那样,CD盘不能写,也不能用任何方式改变其内容。
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Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.
镀锌钢托盘多用于出口,替代木托盘,免薰蒸,符合欧盟、北美各国对出口货物包装材料的法令要求;喷涂钢托盘适用于重载上货架之用,托盘表面根据需要制作成平板状、波纹状及间隔形式,满足不同的使用要求。
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A single payment file can be uploaded from an ERP system to effect all pan-China RMB payments and overseas payments in all currencies.
付款指令文件可从您的 ERP 系统上传到我们的电子银行系统来只是国内及对海外各种币种付款。