驾驶员疲劳检测系统

本工程基于stm32f103开发，实现多路模拟量数据采集，采用乒乓算法，动态DMA存储实时存储到SD卡，在实际试验中测试成功。

利用matlab，实现按帧分割视频为jpg和灰度图。程序可用，只需要改一下input视频的名称。生成的图片在当前文件夹下。无需设置图像大小，图像帧数，均自动实现。

matlab代码，批处理，读入图片，存储矩阵

基于高斯过程分类和回归的最新代码，物超所值

仅供大家学习交流，一个学校的场景漫游·

opengl所有的h头文件，dll文件，lib文件,和库文件设置说明，截止2012年7月最新1.7版glew库。头文件gl.h glaux.h glew.h glext.h glu.h glut.h glxew.h glxext.h wglext.hdll文件glew32 glew32mx glmf32 glu32 glut32 opengl32lib文件 opengl32.lib glu32 glut32.lib glut.lib glew32.lib glaux glew32mx glew32mxs glew32s

本资源是关于用MPC算法来搭建Carsim/Simulink模型进行仿真，其中包含重要的MPC算法的m文件，内有对相关重要代码有具体的说明，适合初学者。

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

摘 要高校学生成绩管理工作是高等教育中的一个极为重要的环节，是院校学生管理的基础。面对种类繁多的数据和报表，手工处理方式已经很难跟上现代化管理的步伐，传统的文件管理方式进行成绩管理，效率很低，耗时费力，容易出错，安全性也存在问题。特别是在查询上，由于文件过多，带来很多不便。随着计算机及通讯技术的飞速发展，高等教育对教务管理工作提出了更高的要求。尽快改变传统的管理模式，运用现代化手段进行科学管理。本设计研究的是基于J2EE的高校成绩管理系统的设计与实现。本系统是基于J2EE开发的成绩管理系统，弥补了人工管理的不足，提高了一定的效率。主要功能包括教师对学生成绩的记录，生成总评成绩，成绩单的

matlab程序，将IQ数据转换为频谱，采样率，精度可以配置。采样率和精度根据IQ数据的实际参数，绘制FFT的点数可以自己配置，2048、4096