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Chapter 6, consider a coupled generalized KdV-Burgers equation. In section 6.2, we study the initial-boundary value problem in the semi-unbounded domain, the existence of global solutions and global attractors is proved by means of a uniform priori estimate for time. In section 6.3, the Cauchy problem by using the weighted space, the existence of the global attractors for a coupled generalized KdV-Burgers in an semi-unbounded domain is proved.
第六章,考虑了一类广义耦合的KdV-Burgers方程,在第二节中讨论了半无界区域上的初边值问题,证明了整体光滑解和整体吸引子的存在性;在第三节中讨论了Cauchy问题,利用加权函数和加权空间上的插值8不等式,证明了半无界区域上整体吸引子的存在性。
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This paper discuss the character of jacquard knitting technics ,we analyse the relationships between knitting technics and embossment graph and give a math model.
本文讨论了针织纬编电脑提花大圆机编织工艺的特点,然后对编织工艺与图形学中的浮雕图形的特点进行分析,提出其完整的电脑提花大圆机编织工艺的浮雕算法数学模型,同时对模型中的几个关键参数进行了讨论,最后给出了该算法在花型系统中的应用成果。
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The mathematical models of the delay of the GPS signal in the circumstance are put forward respectively. The computation of orbital arc of the two satellite constellations is based on two body problem and perturbations models. An algorithm based on the IRI model and thin layer model is used to simulate the ionospheric delay of the GPS signal. The error models of observation, multipath, relativity and antenna phase center bias are also researched. Under the consideration of the autocorrelation of the electronical measurements, the autoregressive model of time series is introduced into the noise models.
在信号仿真中,研究了利用二体运动和摄动法计算LEO卫星至GPS卫星星座的几何距离的问题;在信号的误差模型中,研究了电离层时延的IRI2001模型和单层投影模型;讨论了观测误差、多径效应、相对论效应和天线相位中心偏移的误差模型;结合电子测量噪声的具有自相关特性的经验,研究了观测误差的AR模型;结合实测数据分析,讨论了接收机钟差和卫星钟差的误差建模问题。
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The thesis contains five chapters. The first chapter summarizes the development and research of switched reluctance drive, discusses the main research direction, and explains the main work in this paper. In chapter 2, hardware system which includes the design of power converter and various control circuit is discussed. TMS320LF2407 DSP is used to design the hardware circuits of SRM control system, and design details including the current detection, position sensing, fault protection, speed detecting, keyboard and display etc. are provided. Because of the full use of the abundant peripheral resources of DSP, it comes to the aim simplifying the circuit structure and heightening the reliability. In chapter 3, the application of neural network on SRM control system is introduced, a new the application of neural network and the method of sampling is proposed and a simulation system based on Matlab/Simulink is established. Chapter 4 discusses the routine designing issue. Because the modularized programming method is adopted, and multi-interrupt processing technique is used, operation efficiency of the control software is highly raised. At last, the foregoing SRM control system is tested. Speed adjustment is realized, and other targets on the research and design of SRM control system are reached, which establishes a good foundation for further research.
本文共分五章,第一章概述了开关磁阻电机调速系统(Switched Reluctance Drive,简称SRD)及其发展和研究现状,论述了其主要研究方向,并说明了本文的主要工作;接下来的一章主要讨论了SRM的硬件系统,主要包括功率变换器的设计和各种控制电路的设计,本文以TMS320LF2407为核心设计了开关磁阻电机控制系统硬件电路,给出了包括电流检测、位置检测、故障保护、测速电路及键盘和显示电路等部分电路的详细设计,充分利用了DSP的丰富外设资源,达到了简化电路结构、提高运行可靠性的目的;第三章介绍了人工神经网络在开关磁阻电机控制系统中的应用,提出了一种新的应用方式(利用GPFN神经网络调节PI参数)以及如何采取样本,搭建了基于Matlab/Simulink的仿真系统;在第四章中,讨论了开关磁阻电机控制软件的设计,采用模块化编程方法,采用基于多中断的控制程序,提高了控制软件的效率;最后,对所设计的开关磁阻电机控制系统进行了实验,实现了电机调速,达到了开关磁阻电机控制系统研究和设计的预期目标,为更近一步研究打下了基础。
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First, based on the mathematics model of comprehensive decision at present, the concept of evaluation function is introduced. Based on the thinking stability of decision-maker, the essential meaning of comprehensive decision model is discussed, therefore, and a new improved approach on the comprehensive decision model is put forward. Second, the mathematics model of interval number comprehensive decision is systematically discussed, and the ranking method of interval number based on the decision-maker's attitude is provided. Finally, the concept of valuation order relation is introduced, the valuation order relation of interval number and fuzzy number are systematically discussed in detail, it provides a new method to research the order relations of interval number and fuzzy number, therefore, these achievements can be applied in the intelligent system.
首先,针对常用的综合决策模型,给出了评判函数的概念,讨论了综合决策模型的本质意义,指出决策者的思维应具有稳定性,从而给出了综合决策模型的一种改进方法;第二,在此基础上,给出了区间数的综合决策模型,并详细讨论了基于决策者的决策心态的区间数的排序方法;第三,引入了赋值序关系的概念,详细讨论了区间数和模糊数的赋值序关系,为区间数和模糊数的序关系研究提供了新的思路与方法,这些均有望在智能系统中得到广泛的应用。
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The authors emphatically research that how to utilize the intermediate driver in network driver interface specification to realize the architecture of software platform for wireless ad hoc network in power system; present Passthru based frame of program, optimized link state routing protocol and the principle to implement modules of the program; discuss the feature of the network platform and look forward to the application prospect of the network platform.
针对无线网在电力系统中广阔的应用前景,进一步研究了无线自组网在电力系统中的应用,重点讨论了如何利用NDIS(network driver interface specification)中间驱动程序实现电力系统中的无线自组网软件平台架构,介绍了基于Passthru的程序框架、最优化链路状态路由协议及程序模块的实现原理,并讨论了网络平台的特性,展望了其应用前景。
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In this paper, the glyoxal structure both in reagent and in bulking solution were detected by infrared spectro and mass spectra, the result shows that there is no aldehyde group but only hydrate existing in both solutions. Besides, the mechanism of the ac-tion between glyoxal and waterlogged wood is discussed and some problems like how to prevent the bulk-ing solution from acidification are also mentioned.
此外,还运用红外光谱和质谱法测定了试剂乙二醛和加固液的结构,详细讨论了乙二酯在试剂和加固液中官能团的存在形式和聚合状态的细微变化,指出在二种溶液中并不存在醛基,乙二醛仅以水合物的形式存在并讨论了乙二醛与饱水古木的作用机理,提出用醇溶液能有效控制乙二醛使用中易返酸等问题。
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The result of this study divided into there parts. Before the scripts of sociodramatic play created by young children themselves, they selected and adopted fairy tales to be their scripts of sociodramatic play. In this process, the most important of young children's negotiation behavior was the "roles", which was one of the essential factors of sociodramatic play. Young children took several methods to negotiate the problems of sociodramatic play, such as metacommunication, interpretation and explanation.
在研究结果方面分为三部分讨论,首先讨论的是幼儿在尚未开始以自创故事为架构所进行之社会戏剧游戏,幼儿是以其所知的童话故事为主干进行社会戏剧游戏,幼儿在此历程中协商的重点,是社会戏剧游戏中三大要素里的「角色」这个要素,以后设沟通、说明与解释等方式为主要协商社会戏剧游戏问题的策略。
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In this paper, under the title of"Weberian Sociology of Education",we discuss what Weber wrote about education; under the title of"Weberian Sociology of Education", we make an inquiry into how educational studies have been conducted under the impact of Weber's sociology; and under the title of"Weber's Sociology and Education",we scrutinize what educational themes we can get from Weber's sociological works.
在&韦伯的教育社会学&层面,我们可以讨论韦伯就教育究竟著述了些什么;在&韦伯式的教育社会学&层面,我们可以着重探讨后人在韦伯的理论和方法论的影响下进行了怎样的教育社会学研究;在&韦伯的社会学与教育&层面,要讨论的是,从韦伯的社会学原著中,或者从有关韦伯社会学的研究中,我们可以发掘出什么样的具有深层次启发意义的教育研究命题。
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The method of obtaining time delay parameters with the reverse access channel is discussed. The modified algorithms of classic correlation methods of TOA estimation are proposed. Noncoherently combining algorithm and group coherent combining algorithm are given. They decrease the computational complexity and are more suitable for implementations in practical systems. The leading edge detection algorithm is proposed to mitigate the effect of multipath in TOA estimation. Then the secondary search method is proposed, it can solve the matching issue of PN code in CDMA systems. The location algorithms based on LS are discussed; include circular trilateration with LS, hyperbolic trilateration with reference differencing, hyperbolic trilateration with sequential differencing and circular trilateration with TOA differences. The design and implementation of wireless location system based on TOA/TDOA in CDMA2000 systems are given. The location process is discussed, and the hardware and software implementation of TOA estimation are given. Finally, the wireless location system which uses TOA estimation and LS location algorithms above is tested in the real environment.
文中讨论了采用CDMA2000反向链路中的接入信道来获取时延的方法和过程;对TOA估计的传统的相关法进行了改进,提出了非相干合并相关法和分组合并相关法,减少了基于相关的时延估计算法的运算量,提高了算法的实用性,对算法进行了仿真和性能分析;采用边缘检测技术有效减少了TOA参数估计中的多径干扰,提高了时延参数估计的准确度;提出了一种TOA估计的二次搜索法,解决了多个定位测量单元同时进行TOA估计的PN码匹配问题,进一步了提高TOA估计的精度;在采用时延值的定位算法中引入了基于LS的圆周法、基于参考差的双曲线法、基于相邻差的双曲线法和基于TDOA的圆周法,讨论了各算法的应用条件,进行了算法性能的仿真分析;给出了CDMA2000系统中的TOA/TDOA的无线定位的系统方案和实现流程,并对TOA值估计算法进行了软硬件实现,还对采用TOA估计算法、LS定位算法和定位系统设计方案实现的定位系统的进行了现场定位性能测试。
- 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。