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OpenGL实现三维点云显示，鼠标控制
利用OpenGL实现了三维点云的显示，添加了鼠标控制事件，可以用鼠标对三维点云模型进行移动、缩放等功能。很不错的源代码，本代码运行环境是VS2010，需要添加OpenGL的配置。很不错的源代码分享给大家。
- 2020-11-27下载
- 积分：1
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有关中国人口预测数学模型建立预测
本文对中国中短期、长期的人口作了预测。第一，首先，作为已知的条件（输入）的统计数据都是离散的，如某某年各个年龄的女性生育率、死亡率、性别比等；第二，作为结果输出人们希望得到的数据也是离散的，例如：2010年、2020年、2050年…的人口总数、各个人口总数、人口的年龄分布等；第三，与其用数值的方法求解连续模型，不如直接建立离散模型，也就是所谓的双线型模型，本文就是利用双线型模型解决了问题。通过Matlab进行编程求解，我们得到未来中短期和长期的市区，城镇，乡村的各项人口指标及其各自的发展趋势。若控制总和生育率不超过1.8，则中国总人口将在2015到2020年达到最大值，约为14.5亿，之后开
- 2020-12-09下载
- 积分：1
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东北大学软件工程历年真题
东北大学软件学院 软件工程历年真题 2004~2017 期末考试真题
- 2021-05-09 18:18:34下载
- 积分：1
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年会抽奖系统
是PHP+HTML5开发的一个年会抽奖系统，电脑和手机都可以操作。前几天公司年会，做了个抽奖系统，觉得这东西虽然简单，可还是蛮实用性。
- 2020-11-03下载
- 积分：1
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现代谱估计SVD-TLS,ARMA,最小二乘方法
用一般的最小二乘方法和SVD-TLS方法估计观测数据的ARMA模型的AR参数，并估计正弦波的频率。
- 2020-12-02下载
- 积分：1
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英飞凌IGBT驱动培训资料
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
- 2020-12-11下载
- 积分：1
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MATLAB可视化大学物理学（完整版）.rar
本书为大学物理学的配套代码，每一部分都精心选取和编制了10个范例，共有140个范例。每个范例都按传统物理学的方法，用高等数学进行解析，进而结合图片对物理内容做出详细的说明。程序中将物理内容和例题以范例的形式提出来，进行解析和图示，包含大量的曲线、曲面和动画等可视化例程。此代码可按操作直接运行，对深刻学习物理和形象化理解物理规律很有帮助，让物理不再是刻板而枯燥的文字和公式。
- 2019-08-15下载
- 积分：1
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Matlab气体模拟扩散编程代码
要求用matlab编程模拟分子碰撞，演示气体扩散情况。本实验中的模型采用简化形式，所发生碰撞均为完全弹性碰撞。
- 2020-11-30下载
- 积分：1
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通用信息管理系统框架(VFP+sql)
通用信息管理系统框架(VFP+sql).为可执行的源代码。
- 2020-12-01下载
- 积分：1
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酒店客房管理信息系统.rar
【实例简介】一个用JAVA Swing设计的酒店客房管理信息系统（论文+代码） 保证能运行 可以当毕设使用 本资源来自互联网
- 2021-12-07 00:38:48下载
- 积分：1
