dibubukaicao

说明：  《The Little SAS Book 中文版》以大量实例、清晰简明的解释以及尽可能少的术语来介绍SAS语言，且大部分的功能均来自Base SAS。Base SAS包含了所有程序员所使用的核心功能。(The Little SAS Book Chinese Edition introduces SAS language with a large number of examples, clear and concise explanations and as few terms as possible, and most of its functions come from Base SAS. Base SAS contains the core functions used by all programmers.)

本课件系统地讲述了几何光学的原理，对入门学者来说很有帮助(The principles of the courseware systematically describes the geometrical optics, for entry scholars helpful)

永磁同步电动机调速系统由pmsm月吸逆变器、永磁同步电动机和机械负载三部分组成,每个部分都具有非线性特性和参数的不确定性。因为PWM逆变器死区的存在,在低速以及调制频率很高时,死区特性将会导致逆变器输出电压包含很大的谐波分量,使得电机转矩发生很大的 脉动,甚至导致系统的不稳定。有些学者采用变结构控制降低死区的影响,由于变结构控制本身具有抖振现象,这使得所设计的控制器在到达滑模平面之前很容易激起系统的未建模动态,导致系统无法克服逆变器死区的影响。 (A PMSM drive sysetm Consisst of ade-ac inverter,PMSM and sorne meehan iealload.All hteree eom Ponenst of hte syset maerhca racterizedb ymodel swhich aernon linear and eonati nullkllown Parameetrs. )

基于平均法的buck型DC/DC建模步骤，包括电压模和峰值电流模。增加了误差放大器放大倍数的确定，电源调整率，负载调整率和三种变换器的一阶等效模型(Based on the average of the buck-type DC/DC modeling steps, including the voltage mode and peak current mode. An increase of the error amplifier to determine the magnification, adjust the rate of power supply, load-adjusted factor and three first-order equivalent converter model)

keil简单入门书籍,适合于新手入门使用......(Keil simple introductory books)

用于ANSYS裂纹建模的APDL程序命令流，可建立管道上穿透裂纹模型(APDL for crack in pipeline)

本书介绍了线性系统和数字信号的基础知识，对学习数字信号处理很有帮助。(this book is about linear system and digital systems,which is helpful to people learning digital signal processing)

西门子S7300教学PPT,很适合入门学习之用(Siemens S7300 Teaching PPT, is suitable for entry-learning)

zendframework入门指南 中文版(zendframework)

说明：  通过ansys进行封闭的变压器结构的建模，进而分析变压器的低压侧绕组电压。电流和阻抗的关系(Model the closed transformer structure through ansys, and then analyze the low-voltage side winding voltage of the transformer. Relation between current and impedance)