dell_latitude_d820

BIT1612使用说明书，包括详细的电路设计参考文件，(BIT1612 Manual, including the detailed circuit design reference document,)

Wide area protection system based on IEC61850 communication service model.zip

( 从太原市公交查询系统建立的必要性出发, 进行了公交查询算法的研究, 主要探讨了包括最短路径查 询及最少花费查询及数据库管理的公交查询系统的实现。 该系统采用了V ISU AL BA S IC 610 为开发工具, M ICRO SO FT A CCESS2003 为后台数据库, 开发了基于太原市公交线路的公交查询系统。具有线路查询、换乘 查询、 站点查询、 数据管理等一系列功能。 ((From the city bus system the need for inquiry, carrying out a public inquiry method of research, focused on the shortest path, including at least inquiries and inquiries and database management to spend the public inquiries system. The system uses a V ISU AL BA S IC 610 for the development of tools, M ICRO SO FT A CCESS2003 as the background database, developed based on the city' s public transportation bus lines inquiry system. with line inquiries, transfer information, site information, a series of functions such as data management.)

水下目标被动跟踪及自适应导引律研究，主要解决水下目标的强机动目标跟踪问题 (Underwater passive target tracking and adaptive guidance law studies, mainly to solve the strong maneuvering target tracking problem of underwater target)

为了更好地进行谐波和无功功率的补偿与控制，叶FBD(Fryze一Buchholz一DPenbrock)法的定 义进行了完善，并给出了补偿电流检测的直接法和间接法，在三相电力系统中对FBD间接法进行 了推广研究，利用参考电压进行投影变换，不仅可以检测出功率电流和零功率电流，还可以检测出 基波有功电流、基波无功电流、谐波电流以及任意次谐波电流等，大大拓展了FBD法的应用范围和领域。MATI一AB仿真和实验结果表明了所定义和推广的电流检测方法的正确性和有效性。 (In order to improve the performance of active power filter(APF) harmonic current detection method, a harmonic current detection based on FBD(Fryze-Buchholz-Dpenbrock) algorithm was proposed. Reference voltage was generated by phase locked loop(PLL), and load current was projected to reference voltage, and then the active power fundamental current, reactive power fundamental current, harmonic current, fundamental negative sequence current, any harmonic current and so on can be detected accurately by using low-pass filter(LPF), and in the case of distorted voltage, the method was also applicable. The simulation results verify the fast dynamic speed, high detection accuracy, simple implement and good project value of the proposed algorithm. MATLAB simulation results confirm the feasibility and validity of the method.)

this is a document describe to do homework

这是有关于stm32中的实验板子上的原理图，如果大家认真学习的话，肯定会了解stm32的(This is the experiment on the stm32 schematic diagram on the board, if you carefully study, you will certainly understand stm32 the)

：介绍了一种基于数字信号处理器（DSP）的移相调频（Phase-Shifted and Frequency-Varied，PSFV）PWM控制 逆变电源，给出了主电路拓扑结构，分析了其控制原理并设计了其控制程序流程图。新颖的PSFV 控制能够实现输出 电压90％的调整率，输出电流波动小于单纯移相调功PWM方式，并在轻载时保持连续。功率开关器件零电压零电流 通断（Zero-Voltage-Zero-Current Switching，ZVZCS）软开关的实现，有利于进一步提高开关频率和降低开关损耗。采用 高性能的专用DSP 芯片TMS320F2812 实现了系统的数字控制，满足了系统控制的灵活性和实时性，减小了系统的 体积和生产成本。仿真分析和实验结果证明了此控制模式的可行性与合理性。()

guideline design PCB layout to reduce noise

一种振动时效数据采集系统的软、硬件设计方案，采用labview作为开发平台。振动时效能够很好地消除铸、锻、焊件的残余应力，是一种新型的时效技术。(The software and hardware design of a vibration aging data acquisition system is designed by using LabVIEW as the development platform. The vibration aging can eliminate the residual stress of the cast, forging and welding parts well, and it is a new kind of aging technology.)