基于...

The thesis first probably explains BrushLess Direct Current Motor, and discusses the related control methods, explains the background and Meaning of back electromotive force which is used in the thesis.Then the thesis expounds the basic component parts,the basic running principle,the running characteristic and transfer function of the BLDCM.And then the thesis detailedly dissertates its research pivot: the simulation of BLDCM system in MATLAB based on the method of Back-EMF and the control system of Digital Signal Processor based on the method of Back-EMF.

本文首先对无刷直流电机进行了概述，并对其相关控制方法进行了讨论，说明本文所采用反电动势法的背景和意义；接着论述了无刷直流电机基本组成环节、基本工作原理、运行特性和传递函数，然后是详述本文研究的重点：基于反电动势法的MATLAB调速系统的仿真以及基于反电动势法的DSP控制系统的实现。

Its technology fetures include adopting plug-in technology and modulized structure to guarantee every component can be upgraded and added/removed alone; implementing 'push' mode backup by self-described data file structure to support light weight backup window and to visit backup client safely; adopting various kinds of standard TCP/IP-based internet agreement to guarantee it's expansibility; adopting XML-based message format to guarantee it's compatibility with previous versions; adopting unified resource management agreement to simplify the management of plug-in package and guarantee opening of functions.

它采用插件化、模块化技术保证各组件的单独升级和增删；采用自描述的数据档案结构实现了"推"备份模式来支持小备份窗口并保证了客户机的访问安全；采用基于TCP/IP之上的各种标准Internet协议来保证软件的可扩展性；采用基于XML的消息格式来保证软件升级换代的兼容性；采用统一的资源管理协议来简化软件插件的管理，保证软件功能的开放性。

An improved derivative estimation algorithm with a low-pass filter that can suppress the influence of high-frequency noise is suggested to remove potential drawbacks of the backward difference that was applied in neural network inversion dynamic compensation method, such as large estimation error in the presence of noise and price increase of hardware realization when high estimation accuracy is required.

针对神经网络逆动态补偿策略中基于向后差分的微分估计算法在噪声环境下存在较大的微分估计误差，且提高估计精度会增加硬件成本等缺陷，提出了改进的微分估计算法，并以加速度传感器为例，设计了动态补偿实验装置，给出了基于改进的微分估计算法的动态补偿算法的实现步骤。

Feasibility study on application of DNA bar-coding technology in molecular identification of ScolytideaCO I gene of 15 bark beetle species collected from different regions and host is studied to discuss the feasibility of application of DNA bar-coding technology in Scolytidea molecular identification.

基于线粒体COⅠ基因的DNA条形码技术应用于小蠹科昆虫分子鉴定的可行性研究通过对采自不同地区、不同寄主的15个小蠹虫样本的线粒体COⅠ基因研究，对基于线粒体COⅠ基因的DNA条形码技术应用于小蠹科昆虫分子鉴定的可行性进行了探讨。

Two different methods based on ship rectangular frame and inertial frame are proposed separately according to consistence of radar base angle and beam angle.

本文首先研究了舰载两轴雷达系统抑制船摇的方案，对雷达天线转角和波束转角一致和不一致的情况，分别提出了基于甲板坐标系稳定和基于大地坐标系稳定的不同方法。

Base on intermission angle principle, a practical method was established, which avoids the disadvantage of the traditional method with accurate measurement of intermission angle, but only analyses the wave transformed from original signal after transform.

因此在对比基于小波理论与其它理论的保护算法的基础上，本文对基于小波理论的保护的实际应用作了进一步的研究。

The conventional design method is analyzed, then the total frame of hot runner design based on knowledge is put forward, and knowledge of hot runner design is organized, and the knowledge base of hot runner is built. At last hot runner structural design is finished in detail.

第三章，分析了传统的热流道结构设计方法，给出了基于知识的热流道结构设计的总体框架，利用知识单元进行组织热流道设计知识，建立相应的热流道设计知识库，分析基于知识的推理方法和热流道设计任务规划，并在热流道设计知识库基础上完成结构设计。

According to the data's division and organization, multidimensional data indexes can be divided to two classes: indexes based on space, indexes base on data .

根据数据的划分组织方式，多维索引结构分为两大类：基于空间划分的索引结构和基于数据划分的索引结构。

From this background, A research about how to build a remote diagnosis center based-on the Internet is discussed and a Web Site of Remote Diagnosis Center is built in this thesis.

在这种研究背景下，本文对基于Internet的远程诊断技术进行了系统的研究，并建立了基于Internet的远程诊断中心。

Variable structure element design method was established, and basic structure element and variable structure element were defined.

本文以液压支架设计为背景，采用结构设计原型和基于原型的设计方法解决瓶颈问题，对结构设计、基于原型的设计方法和实现工具进行了深入的研究，主要工作如下： 1。

Recall that, in the Kolmogorov axiomatization, measurable sets are the sets which have a probability or, in other words, the sets corresponding to yes/no questions that have a probabilistic answer.

延期开工的Kolmogorov宣布要衡量所有套职能有限许多坐标限制在于衡量子寅。换句话说，如果是/否的问题回答f可看的价值观念在许多最有限坐标，然后它有一个概率的答案。

The experimental results showed that the algorithm can filter singular points and remain fixity of the target edge.

实验表明：基于模糊理论的图像智能滤波方法比常规图像滤波方法运算量小，它既能去除奇异点，又能保持图像中目标的边缘不变性，具有很好的滤波效果。