基于matalb神经网络预测控制

【实例简介】时频分析工具箱中提供了计算各种线性时频表示和双线性时频分布的函数， 本帖主要列出时频分析工具箱函数简介，以号召大家就时频分析应用展开相关讨论。 一、信号产生函数： amexpo1s 单边指数幅值调制信号 amexpo2s 双边指数幅值调制信号 amgauss 高斯幅值调制信号 amrect 矩形幅值调制信号 amtriang 三角形幅值调制信号 fmconst 定频调制信号 fmhyp 双曲线频率调制信号 fmlin 线性频率调制信号 fmodany 任意频率调制信号 fmpar 抛物线频率调制信号 fmpower 幂指数频率调制信号 fmsin 正弦频率调制信号 gdpower 能量律群延迟信号 altes 时域Altes信号 anaask 幅值键移信号 anabpsk 二进制相位键移信号 anafsk 频率键移信号 anapulse 单位脉冲信号的解析投影 anaqpsk 四进制相位键移信号 anasing Lipscjitz 奇异性 anaste 单位阶跃信号的解析投影 atoms 基本高斯元的线性组合 dopnoise 复多普勒任意信号 doppler 复多普勒信号 klauder 时域Klauder小波 mexhat 时域墨西哥帽小波 二、噪声产生函数 noiseecg 解析复高斯噪声 noiseecu 解析复单位高斯噪声 tfrgabor Gabor表示 tfrstft 短时傅立叶变换 ifestar2 使用AR(2)模型的瞬时频率估计 instfreq 瞬时频率估计 sqrpdlay 群延迟估计 三、模糊函数 ambifunb 窄带模糊函数 ambifuwb 宽带模糊函数 四、Affine类双核线性时频处理函数 tfrbert 单式Bertrand分布 tfrdfla D-Flandrin分布 tfrscalo 尺度图 tfrspaw 平滑伪Affine类Wigner分布 tfrunter Unterberger分布 五、Cohen类双核线性时频处理函数 tfrbj Born-Jordan分布 tfrbud Butterworth分布 tfrcw Choi-Williams分布 tfrgrd 归一化的矩形分布 tfrmh Margenau-Hill分布 tfrmhs Margenau-Hill频谱分布 tfrmmce 谱图的最小平均互熵组合 tfrpage Page分布 tfrwv 伪Wigner-Ville分布 tfrri Rihaczek分布 tfrridb 降低交叉项的分布（Bessel窗） tfrridbn 降低交叉项的分布（二项式窗） tfrridh 降低交叉项的分布（汉宁窗） tfrridt 降低交叉项的分布（三角窗） tfrsp 谱图分布 tfrspwv 平滑伪Wigner-Ville分布 tfrwv Wigner-Ville分布 tfrzam Zhao-Atlas-Marks分布 六、其他处理函数： friedman 瞬时频率密度 htl 图像直线检测中的Hough变换 margtfr 时频表示的能量 momftfr 时频表示的频率矩 momttfr 时频表示的时间矩 renyi Renyi信息度量 ridges 波峰提取 plotifl 绘制归一化的瞬时频率规律 tfrparam 返回用于显示时频表示的参数 tfrqview 时频表示的快速可视化 tfrsave 保存时频表示的参数 tfrview 时频表示的可视化

基于USB摄像头的运动目标捕捉系统，在电脑上插上USB摄像头后开启程序，程序可以在视频画面上自动捕捉运动的物体并以红框标注，还会把运动物体的截图存储在电脑上

初学epics的人可以看看控制系统的建造是复杂的系统工程，作为工程项目要选择成熟可靠的技术，要使用系统集成工具，EPICS is easy to use, need time to learn。

异步电动机变频调速系统的设计与仿真matlabsimulink

C++编程运用SQL数据库实现酒店客房管理系统的基本功能包括查询，修改，更新等……

【实例简介】这里只给大家提供一个部分免费（奖项数

圣诞节快到了，向大家推荐这款很炫的圣诞节特效，用html5+css3实现，还有雪花飘落哦！

包括数据集预处理以及生成tfrecord文件，用自己数据集训练VGG16，亲测可用

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

基于块状导频的ofdm信道估计ls和mmse性能分析