第一节PLC应用系统设计的内容和步骤 第二节PLC的选择 第三节节省PLC输入输出点数的方法 第四节可编程序控制器在逻辑控制系统中的应用实例 第五节可编程序控制器网络及通信

键盘接口(键盘种类矩阵键盘的行扫描与 线反转法的电路、原理与编程); D/A转换接口(DAC0832产生各种波形); AD转换接口(ADC0809三种读取方式电路 及单路采集与多路采集编程应用)

69 Broadcasting R.C. Dorf, Z. Wan, J.F. Lindsey I, D.F. Doelitzsch, J. Whitaker, M.S. Roden, S. Salek, A. H. Clegg Modulation and Demodulation. Radio. Television Systems. High-Definition Television. Digital Audio Broadcasting

59 Conventional Power Generation G.G. Karady Fossil Power Plants. Nuclear Power Plants. Geothermal Power Plants. Hydroelectric Power Plants

46 Electroacoustic Devices P. H. Rogers Transduction Mechanisms. Sensitivity and Source Level. Reciprocity Canonical Equations and Electroacoustic Coupling. Radiation Impedance.Directivity

35 Electromagnetic Fields J.A. Kong Maxwell Equations. Constitutive Relations. Wave Equations and Wave Solutions

9.1 Sn在零磁场时Tc为 3.7K，在绝对零度时的临界磁场Hc(0)为 24×103 A/m。求当T 为 2K时的临界磁场Hc。如果 2K时半径为 0.1cm的Sn线通过电流，求在超导线表明的磁 场强度H等于Hc（2K）时的临界电流为多少安培？

6.1 一维周期场中电子的波函数φk(x)应满足布洛赫定理，若晶格常数为a，电子的 波函数为

22 Semiconductors G.S. Gildenblat, B. Gelmont, M. Milkovic, A. Elshabini-Riad, F.W. Stephenson, I.A. Bhutta, D.C. Look Physical Properties. Diodes. Electrical Equivalent Circuit Models and Device Simulators for Semiconductor Devices Electrical Characterization of Semiconductors

14 Digital Signal Processing W.K. Jenkins, A. D. Poularikas, B. W. Bomar, L.M. Smith, J.A. Cadzow Fourier Transforms er Transforms and the Fast Fourier Transform. Design and Imple of Digital Filters.Signal Restoration