基于MSP430G2553的电压表设计

学生考勤管理系统，实现学生的考勤情况，包括记录学生缺课情况，查询、修改、删除学生缺课记录以及统计某时间段内旷课情况

本系统主要是对在淘宝网、京东网和亚马逊网三大购物网站中的相同产品的信息进行抽取。本系统的重点是实现使用HTML页面爬取功能获取产品数据，对获取到的网页数据进行抽取分析，最后以Web页面形式呈现出来。本系统的难点是使用HTML页面爬取功能获取产品数据，对获取到的网页数据进行抽取分析，结构化抽取的数据和信息。使用到的技术：JSP技术，网络爬虫技术，HTML解析技术Jsoup等。本系统是使用JAVA编写的B/S模式系统，没有用到数据库，开发工具用的是IntelliJ IDEA 13，你也可以使用其它工具（像MyEclipse等），但需要手动将类复制到你创建的项目中。内部包含源码和系统文档。其中代

现代数字信号处理与应用 5.24关于burg算法功率谱实现的仿真实验 自己参考相关的资料写的burg算法，可以运行，结果和课本上基本一直，有些地方处理不好，比较简单就不写注释了。学习burg算法的可以参考一下

MSTAR数据集全部JPEG格式图片，教研室使用，故应该比较完整，分SOC与EOC条件下的数据

大地坐标系和空间直角坐标系转换能实现大地坐标和空间直角坐标的相互转换

在电力电子装置中的一个重要组成部分,输入连接到控制电路的PWM信号输出端，输出连接到装置各IGBT的门极和发射极，将装置中的控制电路产生的数字PWM信号进行隔离传输和电平转换和功率放大,实现控制电路对IGBT进行开通和关断动作的控制，从而实现装置的功率变换功能。InfineontechnologiesIGBT Gate Drive: Power Suppliesa Gate driving voltage for IGBT+15Vturn-on is normally +15VDriver>□1a Gate driving voltage for IGBTOVturn-off can be oV or negativeWith Single Power Supply5V to-15V)a Negative gate driving voltage+15Vhelps IGBt switch off fasterremain in off state but itDriverneeds dual power suppliesOVWhether to use oV or negativegate driving voltage depends15VWith Dual Power Supplieson the requirement on costZH Liang - Al APperformance05Dec2003agefor internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: InterfaceOpto-couplers is commonly used as interfacingdevices for applications where both signaltransmission and potential isolation are requiredOpto-couplers offers reliable isolation between IGBT(high-potential)& micro-controller(low-potential)Opto-couplers has long signal delay(us)and isexpensiveIsolation +VDpCCMicroDrivercontrollerZH Liang - Al AP05Dec2003Page 6for internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: Half-bridge DriveStandard configuration: 2 drivers, 2 power supplies, 2 opto-couplersAdvantages: standard, reliableDisadvantages: using opto-couplers, higher system costIsolation +VDDlCC1DriverCC1MicrocontrollerDD2+VCC2DriverCC2ZH Liang - Al AP05Dec2003Page 7for internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: Half-bridge DriveIn half-bridge IGBT drive, opto-couplers offer two functions(1)safety isolation &(2) shifting the potential of the gatesignal from uc potential to high-side potentialIf safety isolation between IGBT& micro-controller is notneeded, then"Level Shift" can replace opto-coupling andrealize function(2)OptoHigh-sideHigh-sidecouplerDriverIGBTMicro-Opto-LoW-sideLow-sidecontrollercouplerDriverIGBTZH Liang - Al AP05Dec2003Page 8for internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive Level shiftI FeaturesHVc(600V/1200V)沿PULSERFILTERShort Signal DelayPULSE■Cost- effectiveGEN■ No Safety Isolationevel Shift Half-bridge DriverI BenefitHigh-side““°IGBTO Saving Opto-couplersLevel(lower system costShiftMicro● Wider range ofcontrollerLevelLow-side■■■■■直■口m留■Switching FrequencyShiftIGBT(higher flexibility)ZH Liang - Al AP05Dec2003Page 9for internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: CLTNEWO CLT-Coreless Transformer (for signal transmissionu Coils(Primary Secondary Side)realized on SiliconO Short Signal Delay (allowing high or low switching frequencyu Lower Cost(compared to 1200V level-shift driver日 Safety IsolationCLT Half-bridge DriverHigh-sideCLT Single DriverIGBTCLTMicro-controllerCLTIGBTMicro-controllerLoW-sideIGBTZH Liang - Al AP05Dec2003agefor internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: Boot-strapBoot-strap circuit includes only a diode and a capacitora In half-bridge drive, the boot-strap circuit can replace the high-sidepower supply and make single-supply operation possibleWhen the low-side IGBT (or FWD)is on, the diode is forwardbiased and the capacitor is charged by the low-side power supplyvia the low-side IGBT and stores the energyWhen the low-side IGBt(and FWD)is OFF, the diode is reversebiased and blocks the dc-bus voltage to protect the low-sidecircuit. Meanwhile, the capacitor supplies energy to the high-sidedriverThe boot-strap capacitance should be high enough to keep thesupply voltage stable Capacitance needed can be calculatedbased on the working conditions and device parametersZH Liang - Al AP05Dec2003agefor internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: Boot-strap circuitConventional2心菲*|■3 high-side power supplies■1|oW- side power supplyUsing boot-strap circuit心体心心●3 diodes& capacitorso 1 low-side power supplyFeaturesa Diode: ultra-fast recoverya Capacitor: general-purposed ITAa Dependent on low-side IGBTBenefitsSaving 3 PS(transformer cost)22ZH Liang - Al AP05Dec2003Reducing wiring connectionPage 12for internal use onlyInfineon Technologies Asia Pacific

NSGA-II的matlab程序，由Aravind Seshadri编写

本matlab工具箱包含目前大多数的降维技术，包括PCA，LDA，MDS，ProbPCA，Isomap，LLE，Laplacian，KernelPCA，KernelLDA，CCA，MCML，LPP。

Shamir 的(k,n)秘密共享算法将秘密S 分为n个子秘密，任意k 个子秘密都可以恢复出S ，而任意k 1个子秘密无法恢复出S 。

永磁同步电机最小二乘参数辨识，可以运行，效果还可以