HVAC PART03- By Eng. Ramy Ghoraba

网络课程设计报告——以学院校园为背景，设计一个校园网方案(Online Course Design Report- to college campuses as the background to design a campus network program)

关于chirp信号的频率估计和定时估计的论文，对研究chirp信号有一定的帮助(About the frequency of the chirp signal estimation and timing estimation of thesis, has the certain help to the study of chirp signal)

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channel trucking verses frequency hopping uplink

Camera GC0329 0.3M FPC EFL=1.82mm

矢量控制与直接转矩控制是当前主要的两种电机变频调速控制方法，已在两相交流感应电机中得到 了应用。分析了两相不对称电机矢量控制和直接转矩控制原理以及两相三桥臂逆变器的SVPWM实现方法； 运用Matlab的Simulink建立了两相不对称交流感应电机矢量控制和直接转矩控制调速系统的仿真模型，并 对两种控制系统进行了仿真研究，给出了仿真波形，进行了特性比较． 关键词：两相电机；矢量控制；直接转矩控制；SVPWM；MATLAB；仿真(Vector Control and Direct Torque Control is currently the main method of frequency control of two motors, has been in two-phase AC induction motor has been applied. Analysis of asymmetric two-phase motor vector control and direct torque control principle and two-phase SVPWM inverter arm Bridge Implementation the use of Matlab in Simulink to establish a two-phase AC induction motor asymmetry of vector control and direct torque control modulation speed of system simulation models, and the two control system was simulated, the simulation waveform characteristics were compared. Key words: two-phase motor vector control direct torque control SVPWM MATLAB Simulation)

本文是相干光通信权威日本东京大学Kazuro Kikuchi教授最新综述著作。(This paper reviews the history of research and development related to coherent optical communications and describes the principle of coherent detection, including its quantum-noise characteristics.)

详细设计10KW逆变器的英文资料，内有原理图，有较大参考价值(10KW inverter detailed design information in English, there are schematic, a larger reference value)

说明：  银行排队系统的VHDL程序实现，可以实现排队顾客自动取号，查看前面排队人数，银行服务柜台号等。(Bank queuing system VHDL program can be achieved automatically check its customers lined up to view the queue in front of the number of its banking services, such as counters.)

涡街流量计数字信号处理系统的改进与实验 本文针对涡街流量计数字信号处理系统存在的不能测量小流量和易受电磁干扰的问题,对其软硬件方面进行了 改进。重新设计和研制了电荷放大器,提高了灵敏度,增强了适配能力。采取了合理的接地和屏蔽措施,提高了系统的抗干 扰能力。采用去均值和频谱校正的方法,改善了系统的测量精度。编制键盘监控软件,采用状态变量法设计键值分析程序, 实现人机对话功能。进行了液体流量和气体流量的标定实验,结果表明,改进后的数字信号处理系统比常规的流量计信号处 理系统的测量精度高、流程比宽和适配能力强。(Vortex Flowmeter digital signal processing system improvements and experimental In this paper, vortex flowmeter digital signal processing systems can not exist in measuring small flows and vulnerable to electromagnetic interference problems, its hardware and software aspects of the Improvement. To re-design and development of the charge amplifier, increasing sensitivity and enhanced adaptive capacity. Adopted a reasonable grounding and shielding measures to improve the system s anti-stem Interference capability. Used to mean and spectral correction methods to improve the system s measurement accuracy. The preparation of keyboard monitoring software, using state-variable method designed to key analytical procedures, Functions to achieve human-machine dialogue. Were liquid flow and gas flow calibration experiments, the results show that the improved digital signal processing systems than the conventional flow meter signal at Management System s high accuracy, process than the w)