-
prime
一是利用计算机对正整数进行素因子分解认识素数,通过运用筛法与试除法寻找一定范围内的素数,体会到筛法比试除法有效但无法找出所有素数;二是通过若干特殊形式的素数的研究,寻找素数生成公式,发现一些结论;三是借助于非线性拟合技术,观察素数分布规律,利用其研究有关数论问题。(The first computer was used to prime factor decomposition of positive integers understanding of prime numbers, through the use of screening method and trial division to find prime numbers within a certain range, the division experienced a test of an effective screening method but can not identify all the prime numbers second is through a number of special form of prime numbers research, looking for prime number generation formula, found that some of the conclusions third, by means of non-linear fitting technique to observe the distribution of prime numbers, using their research on number theory problems.)
- 2009-12-29 01:04:50下载
- 积分:1
-
FLOWMATLAB
电力系统潮流计算 运用MATLAB软件来实现这一功能(Power Flow using MATLAB software to achieve this functionality)
- 2010-05-15 18:00:00下载
- 积分:1
-
pcm
脉冲编码调制(PCM)实现
编程实现PCM技术的三个过程:采样、量化与编码。
采样:低通连续信号采样,以 x=sin(200*t) m=x./(200*t) m=m.*m 为例说明低通采样定理,绘出信号时、频图形;带通连续信号采样,以x=sin(20*t) m=x./t 为例说明带通采样定理,绘出信号时、频图形。
量化:均匀量化,以幅度 的正弦信号为例实现为64级电平的均匀量化;非均匀量化,输入A律PCM编码器的正弦信号 ,采样序列为 ,将其进行PCM编码,给出编码器的输出码组序列
编码:以上述信号为例,实现A律的13折线近似法及国际标准PCM对数A律量化编码。(Pulse code modulation (PCM) to achieve
PCM technology programming three processes: sampling, quantization and coding.
Sample: low-pass continuous signal sampling to x = sin (200* t) m = x./(200* t) m = m.* m an example low-pass sampling theorem, draw the signal, frequency graphics bandpass sampling continuous signals to x = sin (20* t) m = x./t an example bandpass sampling theorem, draw the signal, frequency graph.
Quantization: uniform quantization, in order to realize the magnitude of sinusoidal signal as an example for the 64 level uniform quantization non-uniform quantization, input A law PCM encoder sine signal, the sampling sequence, to be PCM encoded, the encoder is given The output code sequence
Code: A Case Study of the signal to achieve the 13 A line approximation law and international standards on the number of A law PCM coding quantization.)
- 2010-05-31 14:35:33下载
- 积分:1
-
CodeOfPattenRecognition
华北电力大学模式识别课程——苹果、梨的分类器,并在图像上形象直观的画出。(NCEPU Pattern Recognition)
- 2013-12-05 19:55:15下载
- 积分:1
-
6.3 ADPCM编解码实验
【实例简介】
- 2021-07-31 00:31:08下载
- 积分:1
-
Lorenz equations
利用方程产生 Lorenz 时间序列,十分有用-Lorenz equations
- 2022-03-01 19:11:53下载
- 积分:1
-
用LAPLACE方法求解多维沃尔泰拉方程,此处为一个变元的方程,由于该方程同时含有微分和积分,一般求解有一定的困难。此处为MATLAB程序...
用LAPLACE方法求解多维沃尔泰拉方程,此处为一个变元的方程,由于该方程同时含有微分和积分,一般求解有一定的困难。此处为MATLAB程序-used method for multiple preoperational Ertaila equation here as a variable element of the equation, As the same time contain differential equations and integral, the general solution is definitely difficult. Here for the MATLAB program
- 2022-07-03 16:06:31下载
- 积分:1
-
使用局部二进制模式 (LBP) 的旋转不变纹理分类
纹理分析的图像分析非平凡的一部份。不同的纹理图像的分类必须旋转等各种参数的鲁棒性。在此代码中使用的解决方案是局部二进制模式 (LBP) 修改具有旋转不变性,因为它代表了复杂性和性能之间最好的折衷办法。纹理分析应该是理想的情况是不变的观点。一种好的纹理分类算法时,必须考虑到几个方面。他们当中包括照明、 缩放、 旋转和投影不变性、 与噪声的鲁棒性和其他参数,以及窗口大小要求和计算复杂度。考虑到的只有不变方面是旋转和缩放不变性和计算复杂度。该解决方案已经过测试的纹理数据库。13 纹理的是树皮砖泡沫草皮革猪皮椰砂稻草水编织木材和羊毛。有 7 版本的纹理在每个类中,对应于 7 不同旋转角度: 0 °、 30 °、 60 °、 90 °、 120 °、 150 °、 200 °。结果与最近邻居 calssifier 和 k-折交叉验证每个纹理被划分成 4 个区域,生成更多的积分 98.9%正确分类的原始数据集和 93%。Test1 文件夹包括用于旋转不变的 LBP 特征的代码。Test2 文件夹包含代码的原始 Brodatz databasetest 3 文件夹分类包括分类分区数据库的代码旋转的纹理图像的纹理数据库都可免费在这里: http://sipi.usc.edu/database/database.php?volume=rotate
- 2022-07-24 22:30:03下载
- 积分:1
-
ellipsoidFN
this code for "ellipsoidFN: a tool for identifying a heterogeneous set of cancer biomarkers based on gene expressions" new tool for feature selection (biomarkers discovery)
- 2013-04-13 22:34:42下载
- 积分:1
-
基于matlab的simulink的反激变换器仿真
基于matlab的simulink的反激变换器仿真(Simulation of Simulink flyback converter based on MATLAB)
- 2020-06-22 03:20:01下载
- 积分:1