一、 交流电动机调速特性、特点和使用场合； 二、 交流调速的基本原理和类型； 三、 各种调速系统的组成和工作原理

7.1 Introduction 7.2 State Equations in Normal Form 7.3 The Concept of State and State Variables and Normal Tree 7.4 Systematic Procedure in Writing State Equations 7.5 State Equations for Networks Described by Scalar

6.1 Definitions and Properties Richard C. Dorf Laplace Transform Integral. Region of Absolute University of California, Davis Convergence Properties of Laplace Transform.Time-Convolution Property Time-Correlation Property Inverse Laplace Transform

5.1 Diodes and Rectifiers DiodesRectifiers Jerry L. Hudgins 5.2Limiters University of South carolina Limiting Circuits. Precision Rectifying Circuits Theodore. Bogart, Jr. 5.3 Distortion Harmonic Distortion.Power-Series Method.Differential-Error University of Southern Mississippi Method Three- Point Method. Five-Point Method

对双环传动的轧机两质量模型进行理论分析并结合工程实际,提出了一种基于H∞滤波器和负荷观测器复合补偿的轧机主传动振动抑制新方法.在负荷观测器系统基础上,通过求解LMI的EVP问题来构造H∞滤波器得到轧辊速度观测值,并据此构造轧辊速度反馈环.较之传统状态观测器和负荷观测器法,该方法放宽了使用观测器的假设条件,将基于负荷观测器和状态观测器的补偿有机结合,实现了电机和轧辊速度的综合振荡抑制.仿真结果表明,与传统负荷观测器方法相比,该方法对电机和轧辊速度同时具有较好的振荡抑制效果

4.1 Introduction Laplace Transform. Transfer Functions 4.2 Low-Pass Filter Functions Thomson Functions.Chebyshev Functions 4.3L ow- w-Pass Filters Introduction. Butterworth Filters.Thomson Filters.Chebyshev

在工业纯铁熔体中加入纳米Al2O3颗粒,熔炼后得到铸锭试样.用扫描电镜(SEM)及能谱(EDS)研究了铸锭金相试样中夹杂物的存在状态及成分.采用非水溶液电解法分离、收集铸锭中的非金属夹杂物,用SEM及EDS分析了夹杂物的形貌、大小和元素组成.结果表明,外加的纳米Al2O3颗粒能够在纯铁熔体中稳定存在,并与杂质元素所生成的夹杂物发生复合,复合夹杂物的尺寸为5~10μm.纳米Al2O3颗粒一般存在于复合夹杂物的内部.未发现纳米Al2O3团聚烧结成大于10μm颗粒的现象.从热力学和颗粒运动行为方面进一步分析了纳米Al2O3在纯铁熔体中的稳定性和团聚烧结成大颗粒的可能性

3.1 Voltage and Current Laws Kirchhoff's Current Law. Kirchhoff's Current Law in the Complex Domain.Kirchhoff's Voltage Law. Kirchhoff's Voltage Law in the Complex Domain. Importance of KVL and KCI Michael D. Ciletti 3.2 Node and Mesh Analysis University of Colorado Node Analysis. Mesh Analysis. Summary 3.3 Network Theorems J. David Irwin

2.1 Step, Impulse, Ramp, Sinusoidal, Exponential,and University of California, Davis DC Signals Zhen Wan Step Function. The Impulse. Ramp Function.Sinusoidal FunctionDCSignal University of California, Davis 2.2 Ideal and Practical Sources Clayton R. Paul Ideal Sources. Practical Sources University of Kentucky, Lexington 2.3 Controlled Sources What Are Controlled Sources? What Is the Significance of J. R. Cogdell

研究了稀土对电刷镀Ni-P合金耐蚀性能及组织的影响,浸泡实验和极化曲线表明:在镀液中添加一定量的稀土能显著改善镀层耐蚀性能,X射线、透射电子显微镜及能谱表明:稀土元素具有促进Ni-P合金形成非晶组织的作用,并提出了稀土促进非晶化的可能机理