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zhaomingdagonglvfaguanerjiguan
根据传热理论, 建立了大功率发光二极管的有限元模型. 选择了4 种键合材料( 高导热导电
银胶、纳米银焊膏, 大功率芯片键合胶、Sn70Pb30) , 4 种基板材料( Al2O3、A lN、A-l SiC、铜钼合金) .
采用ANSYS 有限元热分析软件进行了温度场仿真, 得到了大功率发光二极管封装材料的最优选
择. 研究了基板厚度、芯片输出功率及外接热沉时对发光二极管结温的影响.(Heat transfer theory, the finite element model of the high-power light-emitting diode. Choose four kinds of bonding material (high thermal conductive silver glue, nano-silver paste, high-power chip bonding glue Sn70Pb30) substrate material ( Al2O3, A lN, Al SiC, copper molybdenum alloy). temperature field simulation using ANSYS finite element thermal analysis software, the optimal choice of high-power light-emitting diode packaging materials. substrate thickness, chip output power and external heat Shen light-emitting diode junction temperature.)
- 2012-10-25 13:22:30下载
- 积分：1
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ca713
信号维数的估计，计算一维光子晶体的透射特性和反射特性，小波包分析提取振动信号中的特征频率。( Signal dimension estimates, Calculated transmission characteristics and reflection characteristics of the one-dimensional photonic crystals, Wavelet packet analysis to extract vibration signal characteristic frequency.)
- 2017-04-19 09:47:37下载
- 积分：1
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计算多层膜结构的透射率Transsion
计算多层膜结构的透射率。可以计算各种偏振态，各层膜材料的折射率和厚度及波长等可以自己设置。(multilayered film, transmission, wavelength.)
- 2015-08-22 15:04:32下载
- 积分：1
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LM_sample
Levenberg Marquardt算法的matlab代码,简洁无误,结构清晰,便于快速学习。(
LevenbergMarquardt algorithm matlab code, simple and correct, clear structure, easy to learn quickly.)
- 2017-06-01 19:37:34下载
- 积分：1
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FFT
利用FFT估计正弦信号的频率,要估计一个叠加了高斯白噪声的正弦信号 的频率 ，可以通过对x(n)做傅里叶变换，得到频谱图，找出幅度的最大值对应的频率值 ，进行多次变换，求出均方误差 。改变信噪比SNR，通过仿真可以得出随着信噪比增加，均方误差减小。(Sinusoidal signal using FFT frequency estimation, to estimate a Gaussian white noise superimposed on the frequency of sinusoidal signals, can be achieved by x (n) be the Fourier transform to get spectrum to identify the magnitude of the frequency value corresponding to the maximum , several transformations, find the mean square error. Change the signal to noise ratio SNR, the simulation can be drawn as the SNR increases, the mean square error decreases.)
- 2011-04-26 10:53:04下载
- 积分：1
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function-diagram
产生 50 个标准正态分布的随机数, 经验累计分布函数图.(Random number generated 50 standard normal distribution, noting their distribution characteristics, and to draw experience cumulative distribution function diagram.)
- 2012-12-18 10:30:44下载
- 积分：1
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VUMAT_UMAT-interface
abaqus umat与vumat之间的转换(interface between umat and vumat)
- 2021-05-07 20:28:36下载
- 积分：1
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DOP.m
说明： 该程序适用于GPS接收机定位精度因子DOP值计算(GPS DOP value)
- 2020-11-10 21:39:45下载
- 积分：1
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FEM_plane
有限元法计算平板受集中载荷的程序，二维四边形网格(finite element method concentrated load plate by the procedure, two-dimensional rectangular grid)
- 2007-05-29 14:35:35下载
- 积分：1
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lxcad-stress-umat12
利用abaqus二次开发平台，利用for语言编写的混凝土弹性本构(Use abaqus secondary development platform, the use of language for concrete elastic constitutive)
- 2020-11-23 20:09:34下载
- 积分：1
