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DC学习笔记

于 2020-12-07 发布

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机器学习实验报告
朴素贝叶斯和logistic回归分类做出来的实验结果

2020-12-09下载

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双闭环直流电机调速系统设计.doc
【实例简介】直流电机调速系统在现代化工业生产中已经得到广泛应用。直流电动机具有良好的起、制动性能和调速性能，易于在大范围内平滑调速，且调速后的效率很高。针对直流电机调速的方法也很多，目前国内外也研究了一些调速的控制器。例如已经用于实际生产的直流电机无级电子调速控制器采用国际先进的IGBT大功率模块器件和独特自行设计的PWM微电子控制技术，以及节能反馈电路和丰富的保护功能控制电路。适用于无轨机车、矿山井下窄轨机车、磨床、木工机械、服装制作、纺织、造纸印刷等场所。该控制器具有调速平稳，安全可靠，提高生产效率；直流电机正反转控制简便；可以与计算机连接控制等特点。

2021-12-07 00:39:04下载

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matlab广义回归程序代码
广义回归神经网络matlab编程，根据已知数据进行训练并对数据进预测。

2020-12-08下载

积分：1
freeModbus移植在2812上，已调试通过
【实例简介】freeModbus移植在2812上，已调试通过,可以直接在2812DSP中使用

2021-11-08 00:36:29下载

积分：1
经典教材：雷达原理ppt
很经典的教材雷达原理的ppt，第四版，非常棒

2020-12-06下载

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labview音频处理
产品音频信号测试系统 LV8.6 - 副本.vi

2021-05-06下载

积分：1
IIR数字滤波器设计及软件实现 Matlab
1．实验目的（1）熟悉用双线性变换法设计IIR数字滤波器的原理与方法；（2）学会调用MATLAB信号处理工具箱中滤波器设计函数（或滤波器设计分析工具fdatool）设计各种IIR数字滤波器，学会根据滤波需求确定滤波器指标参数。（3）掌握IIR数字滤波器的MATLAB实现方法。（3）通过观察滤波器输入输出信号的时域波形及其频谱，建立数字滤波的概念。2．实验原理设计IIR数字滤波器一般采用间接法（脉冲响应不变法和双线性变换法），应用最广泛的是双线性变换法。基本设计过程是：①先将给定的数字滤波器的指标转换成过渡模拟滤波器的指标； ②设计过渡模拟滤波器；③将过渡模拟滤波器系统函数转换成数字

2020-11-29下载

积分：1
基于小波变换和直方图均衡的红外图像增强
基于红外图像低分辨率、低对比度、视觉特性差的特性，以及传统的利用直方图均衡化进行红外图像增强的方法会丢失图像的细节信息、增强红外图像的噪声的特性，将小波变换的多尺度、多分辨率的特点和直方图均衡化的方法相结合，提出一种更好的实现红外图像增强的算法。激光与红外No.22013尹士畅等基于小波变换和直方图均衡的红外图像增强227度下的原因,手臂的温度和环温比较接近,从而使得得到的图像的对比度比较差,视觉效果不明显。如图2中为经过小波变换后提取出来的图像的低频成分,从中可以看出,该图像和原始图像的对比度差别不大,但是从视觉上来看,图片的连续性较好,噪声较少。图3是经过直方图均衡化处理的图像,经过直方图均衡化之后图像的整体的视觉效果变好了,图片中手表和手臂的对比度非常明显,甚至包括表图4本文增强算法带和手臂的也可以清楚地辨认出来。然而,经过直7结论方图均衡化之后,手臂左下角方向和右下角方向以针对直方图均衡化和小波变换在红外图像增强及手表中央的噪声也变得非常的大,相比较原始图存在的问题,本文所提出的改进算法,通过将两者的像而言信噪比变差了。图4则是将直方图均衡化和优势相结合,弥补单独算法的劣势,从而达到适当提小波变换算法相结合后增强的红外图像,相比较图高原始红外图像的对比度,增强了目标和背景的差3而言,对比度的变化不大,但是图像的很多噪声特异性并且保证红外图像的信噪比的效果。性得到了改善,尤其是手表中央和手臂的左右下角部分的噪声得到了明显改善,从而很好的验证了该参考文献:算法的可行性。[1 Lin Zhenxian Song Guoxiang, Xue Wen Comparison andimprovements of several methods wavelet image denoising[ J]. Journal of Xidian University, 2004, 31(4)625-629.( in Chinese)林椹尠,宋国乡,薛文.图像的几种小波去噪方法的比较和改进[J].西安电子科技大学学报,2004,31(4):625-6292 Yu Tianhe, Hao Fuchun, Kang Weimin Summarization onthe infrared image enhancement technology [J]. Infrared图1原始红外图像and Laser Engineering, 2007, S2): 131-137.( in Chinese于天河,郝富春,康为民红外图像增强技术综述[J]红外与激光工程,2007,(S2):131-137[3 Xie Jiecheng, Zhang Dali, Xu Wenli. Wavelet Image De-noising vigorously [ J]. Journal of Image and Graphics2002,7(3):209-218.( in Chinese)谢杰成,张大力,徐文立小波图象去噪综述[J].中国图象图形学报,2002,7(3):209-218图2低频红外图像[4 Peng Zhou, Zhao Baojun. Nover scheme for infrared imageenhancement based on contourlet transform and fuzzy theory[J]. Laser& nfrared,2011,41(6):129-133.彭洲,赵保军.基于 Contourlet变换和模糊理论的红外图像增强算法[J].激光与红外,2011,41(6):129-133[5 Yong Yang, Wang Jingru, Zhang Qiheng. Enhancement oflow Contrast Image Contain Small Targ[ J]. Laser &Infrared,2005,35(5):373-377.( in Chinese)图3直方图均衡化雍杨,王敬儒,张启衡.弱小目标低对比度图像增强算228激光与红外第43卷法研究[J].激光与红外,205,35(5):373-377round[ J. Laser Infrared, 2003, 33(6): 109-114.[6 An Chengbin, Ren Hongliang, Nei Chuanhong, et al. Infraincsered Image Enhancement Technology for Staring Infrared温佩芝,史泽林,于海斌基于小波变换的复杂海面背Imager[ J]. Laser Infrared, 2003, 33(6): 32-33. (in景红外小目标检测[J]激光与红外,2003,33(6)nese109-114安成斌任宏亮,传虹,等凝视焦平面热像仪的红[11]孙延奎小波分析及其应用M].北京:机械工业出版外图像增强技术[J].激光与红外,203,33(6):社,2005[12] Turghunjan, et al. a technique of image enhancement[7]宋芳莉图像边缘检测中的方法研究[D].西安:西北based on the dyadic wavelet transform[ J]. Joumal of Xin-大学,2002jiang Normal University Natural Science Edition, 2006[8 Luo Jiebo, Chen Changwen, Parker K J Image enhancement25(4):6-13for low bit rate wavelet-based compression[ J]. IEEE Inter吐尔洪江,等.基于二进小波变换的图像增强技术national Symposium on Circuits and Systems, 1997: 6-20[J].新疆师范大学学报:自然科学版,2006,25(4)[9 Ji Shupeng, Ding Xiaoqing. Study on image enhancing fusion algorithm of visible and infrared image[J]. Laser [13]S Mallat. a Wavelet Tour of Signal Processing[ M].PittsInfrared, 2002, 31(6): 518-521.( in Chinese): Academic Press, 1999.吉书鹏,丁晓青.可见光与红外图像增强融合算法矸4]张德丰 MATLAB小波分析[M].机械工业出版社究[J激光与红外,2002,31(6):518-5212009[10] Wen peizhi, Shi Zhelin, Yu haibin. Wavelet transform-[15]葛哲学,沙威.小波分析理论与 MATLAB R007实现based Detection for Small IR Target in Complex Sea Back-[M].北京:电子工业出版社,2007

2020-12-03下载

积分：1
Rohde&Schwarz 频谱仪操作手册（英文）
Rohde&Schwarz 频谱仪操作手册（英文） 1145.5850系列全英文，详细的操作方式，各类使用技巧R&S FSHContentsContentsSpecificationsSafety InstructionsCertificate of qualitEC-Certificate of conformitySupport Center AddressList of R&S RepresentativesPutting into OperationFront view1.1Putting into Operation1.2Unpacking the Instrument1.2Setting up the InstrumentSwitching on the Spectrum Analyzer1.4Spectrum Analyzer Connectors1.5Screen SettingsQCountry-Specific Settings1.10Setting the Date and TimeSetting the date.1.11Setting the time1.1Charging the Battery......1.12Selecting the Instrument Default Setup1.13External Reference /External Trigger Switchover1.14Controlling the rF Attenuator1.15Using a Preamplifier…1.15PIN Entr1.17Connecting Printers.1.19Setting the Baud rate for Remote Control1.21Enabling Options1.21Checking the Installed options1.221145.5973.12E-15ContentsR&S FSH2 Getting Started2.Measurements on cw signals2.1Level measurement2Setting the Reference Level量‘面2.2Frequency Measurements2.3Harmonic Measurements of a sinewave Signal面面2.4Power Measurements Using the Power Sensor2.5Power and return loss measurements with the r&s FsH-z14 or the r&s FSH-Z444427Two-Port Transmission measurements2.9Measurement of return loss2.11Performing Distance-To-Fault Measurements...2.14Operation in Receiver Mode2.20Measuring the carrier-to-Noise power ratio2.Determining the Reference2.26Sts…2.26Selecting the reference channel2.27Entering the channel bandwidth of the reference channel2.27Selecting the unit for the reference...2.27Manually entering the reference2.27Automatic level adjustment2.27Measuring the Noise Power and Calculating Carrier Power /Noise Power.........2.28Selecting the result display2.28Frequency setting of the noise channel..2.28Setting the noise channel measurement bandwidth2.29Setting the C/N channel bandwidth2.29Automatic level adjustment2.29Correcting the displayed average noise level2.30Hiding the result display2.30Saving and Recalling Settings and Test Results2.31Saving Measurement Results2.31Saving Calibration Data2.32Recalling measurement results2.33Printing Out Measurement Results……2.341145.5973.122E-15R&S FSHContents3 Operation3.Screen LayoutScreen layout for spectrum-mode measurements without markers3.1Screen layout when the marker mode is selected3.2Entering Measurement ParametersEntering values and texts3.3Entering units3.4Menu overview.3.5Frequency entryFrequency span...Level setting…3.5Bandwidth settingTrace setting3.6Measurement functions3.7Marke3.10Save and print menu3.12Instrument setup3.12Status display3.12Menus in the Receiver Mode(option R&S FSH-K3)3.13Menu for 3GPP BTS Code domain Power Measurement (Option R&S FSH-K4)3.16Menu for Vector Voltmeter(Option R&S FSH-K2)3.161145.5973.12E-15ContentsR&S FSH4 Instrument functions4Instrument Default Setup4.1Status Display..................4.1Setting the Frequency4.2Entering the center frequency..4.2Setting a frequency offset4.2Entering the center-frequency step size4.3Entering the start and stop frequency4.4Working with channel tablesSetting the Span1面4.6Setting the Amplitude Parameters4.7Setting the reference levelEntering the display range94.9Entering the display unit4.9Entering the reference offset4.10Entering the input impedance.…………4.10Setting the Bandwidths4.11Resolution bandwidth4.11Video bandwidth4.13Setting the Sweep4.14Sweep time.4.15Sweep mode.4.15Trigger4.16Trace Settings4.19Trace mode∴4.19Detector4.20Trace memory…4.22Trace mathematics4.23Using the Markers4.24Automatic marker positioning .......4.25Using more than one marker at a time(multimarker mode).........,4.27Marker functions4.30Measuring the noise power density4.30Measuring the frequency4.31Measuring the filter bandwidth or the signal bandwidth4.32aF demodulation4.331145.5973.12E-15R&S FSHContentsUsing the dis play line…….….….….….….….….….…..….….……….…..34Setting and Using the Measurement Functions4.35Measuring the channel power of continuously modulated signals………………4.35Selecting the standard4.36Setting the reference level4.38Setting the channel bandwidth4.38Changing the spaPower displaPower measurements on TDMA signals4.42Selecting a standard∴4.42Setting the measurement time4.44Optimizing the reference level ..4.44Power readout4.45Setting the trigger4.45Measuring the occupied bandwidth4.46Selecting a standard4.47Setting the reference level4.48Setting the channel bandwidth4.49Entering the power percent to determine the occupied bandwidth4.50Displaying thupied bandwidth4.50Changing the spai1145.5973.12E-15ContentsR&S FSHMeasuring the Carrier-to-Noise Ratio.......4.52Determining the reference4.53Setting the reference channel4.53Setting the reference channel bandwidth……4.53Setting the analyzer reference level for the reference channel measurement4.54Manual reference mode4.54Inserting the c/N referenceUnits of the c/n reference4.55StandardsUSER Standard4.56User-specific standards4.56Predefined user-specific standards4.59Predefined user-specific standard Digital TX4.59Predefined user-specific standard ANalog tv mode4.60Predefined user-specific standard ctx4.60Measuring the noise channel power and calculating the carrier power/noise power.4.62Frequency setting of the noise channel………4.63Setting the noise channel bandwidth4.64Setting the C/N ratio channel bandwidth4.64Setting the reference level during noise channel measurement.4.65Selecting the c/ N result display..…,…4.65C/N measurement result display4.66Changing the span4.66Correction of inherent noise power4.67Using the R&S FSH in receiver mode4.68Setting the frequencySetting the reference level,,,。.。4.71Setting the bandwidth4.72Setting the detector4.73Setting the measurement time4.73Measurement on multiple frequencies or channels(scan)4.74Measurements using the power sensor4.76Connecting the power sensor……4.76Zeroing the power sensor.4.78Selecting the unit for the power readout4.79Setting the averaging time.……4.80Taking additional loss or gain into account4.81Measuring forward and reflected power∴4.82Zeroing the power sensor4.84Setting the power measurement weighting4.85Selecting the unit for the power readout4.86Taking additional attenuation into account4.881145.5973.126E-15R&S FSHContentsTwo-port measurements with the tracking generator489Measuring the transmission of two-ports4.91Vector transmission measurement494Measuring the transmission magnitude........4.96Measuring the transmission phase4.96Measuring the electrical length when measuring transmission面B国4.99Measuring the group delay when measuring transmission4.100Transmission measurement using the connected VSWR Bridge R&S FSH-Z3.. 4.102Sppectrum measurements with the VsWR Bridge R&s FSH-Z3 or R&S FSH-Z2connectedSetting for detecting the R&S FSH-Z3 in the transm. and spectr. measurement .. 4.104Supplying DC voltage to active DUTs4.105Reflection measurements4.105Scalar measurement of reflection4.106Vector measurement of reflection4.108Measuring the reflection magnitude4.111Measuring the reflection phase.……4.111Measuring the electrical length when measuring reflection4.112Displaying the reflection in the Smith chart4.113Measuring the group delay when measuring reflection4.118Selecting the calibration standards4.120Spectrum measurements with the vswr Bridge r&s FSH-Z3 or R&S FSH-z2connected4.121Settings for detection of the R&SFSH-z2andR&SFSH-Z3………4.122One-Port measurement of cable loss4.123Vector voltmeter.4.124Reflection measurements(S11)4.125Measuring transmission coefficients(S21)4.128Cable measurements4.134Cable selection∴4.135Selecting the frequency range…4.138Calibrating the test setupa.::::::.“14.139Locating cable faults by means of the marker function4.142Measuring spectrum and reflection4.145Further information∴4.146Setting the span4.146Selecting the center frequency.........∴4.147Measurement4.148Length measurement accuracy4.148Using limit Lines∴4.149Measurements with limit lines国面面4.151Definition range of limit lines4.152Data sets containing limit lines...4.1521145.5973.127ContentsR&S FSHMeasuring with Transducer Factors.4.153Unit for measurements with transducers4.156Reference level settings for measurements with transducers4.156Frequency range of transducer………4.156Data sets containing transducer factors4.156Field-Strength Measurement with Isotropic Antenna∴4.157Connecting the antenna to the R&S FSH4.157Measurement of the resultant field strength in a transm. channel with large bandwidth .......4.159Code Domain Power Measurement on 3GPP FDD Signals.4.166Saving and Loading Instrument Settings and Measurement Results4.173Saving results4.174Entering a data set name4.175Loading measurement results.4.175Deleting saved data sets4.176Deleting all data sets4.177Printing out Measurement Results4.178Measurements4.179How a spectrum analyzer operates…4.1791145.5973.12E-15

2020-12-10下载

积分：1
SVPWM三相逆变仿真
采用SVPWM空间矢量脉宽调制技术的三相逆变的matlab仿真

2020-11-27下载

积分：1

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DC学习笔记

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