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entropy
entropy matlab .m file
- 2012-03-24 15:24:42下载
- 积分:1
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longwall scraper conveyor
Modeling and simulation of longwall scraper conveyor considering operational faults (1)
- 2020-06-22 00:20:02下载
- 积分:1
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DateConvert
DateConvert:简单而快速的日期转换
DateConvert转换DATESTR(0)格式的日期向量或序列号和日期向后。
Matlab的DATENUM,DATEVEC和DATESTR接受各种不同意见,但结果他们是缓慢的。如果输入格式正是众所周知,转换可以更快:
DATENUM( 17 - 10 - 2009 11时08分23秒 ):2.97秒
DateConvert( 17 - 10 - 2009 11时08分23秒 , 号码 ):0.039秒
=>“1.3%(1000环,1.5GHz的奔腾- M的,利用Matlab 7.7)
DateConvert不*不*验证作为Matlab的日期函数输入日期:
DATEVEC( 32 - 2 - 2008 25:62:63 )的答复[2008 3 4 2 2 7]
DateConvert( 32 - 2 - 2008 25:61:67 , 载体 )的答复[2008 2 32 25 61 67]!
因此DateConvert几乎微不足道,但对速度进行了优化。我需要时间排序200 000邮票,并从217个减少到11秒的时间。
请运行单元测试TestDateVec检查的有效性和速度。
测试:利用Matlab 6.5,7.7,7.8,winxp的,32位。
纯Matlab代码,所以兼容性的MacOS,Linux操作系统,64位预期。
英语月份名称是必要的。(DateConvert: Simple but fast date conversion
DateConvert converts the DATESTR(0) format to a date vector or serial date number and backwards.
Matlab s DATENUM, DATEVEC and DATESTR accept a variety of inputs, but in consequence they are slow. If the input format is exactly known, the conversion can be much faster:
DATENUM( 17-Oct-2009 11:08:23 ): 2.97 sec
DateConvert( 17-Oct-2009 11:08:23 , number ): 0.039 sec
=> 1.3 (1000 loops, 1.5GHz Pentium-M, Matlab 7.7)
DateConvert does*not* validate the input date as Matlab s date functions:
DATEVEC( 32-Feb-2008 25:62:63 ) replies [2008 3 4 2 2 7],
DateConvert( 32-Feb-2008 25:61:67 , vector ) replies [2008 2 32 25 61 67] !
So DateConvert is nearly trivial, but optimized for speed. I needed it for sorting 200 000 time stamps and reduced the time from 217 to 11 sec.
Please run the unit-test TestDateVec to check validity and speed.
Tested: Matlab 6.5, 7.7, 7.8, WinXP, 32bit.
Pure Matlab code, so compat)
- 2010-07-05 11:59:46下载
- 积分:1
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66FFma
高准确度,支持50Hz/60Hz IEC 687/1036 标准的准确度要求,在500:1 的动态范围内误差小于0.1 (High accuracy, supports 50Hz/60Hz IEC 687/1036 standard accuracy requirements, the 500:1 dynamic range of error is less than 0.1 )
- 2010-07-17 08:43:58下载
- 积分:1
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WriteCleanCode
这是关于C的编程风格以及效率的一本书籍,是中文版的。(This is about C programming style and efficiency of a book, is the Chinese version.)
- 2009-12-21 16:27:49下载
- 积分:1
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tls
总体最小二乘法代码,包含误差的产生。。。。。。。。。(total least square)
- 2021-03-27 14:39:12下载
- 积分:1
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coreextract
file to extract angle direction of orientation field
- 2013-10-06 01:08:05下载
- 积分:1
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xtjl
实现了25种系统聚类的方法,在函数的选项里面可以进行方便的指定。同时可以自动计算这25种方法的评价函数,选择最优的系统聚类方法(25 kinds of systems to achieve a clustering method, in function of the option which can be easily specified. At the same time, it can automatically calculate the 25 kinds of methods of evaluation function, the system choose the best clustering method)
- 2009-05-09 17:10:49下载
- 积分:1
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20090903MATLAB
说明: MATLAB数值计算,三角函数、随机数、微分方程、差分方程、概率论、统计。(MATLAB numerical calculation, trigonometric functions, random number, differential equations, differential equations, probability theory, statistics.)
- 2009-09-03 13:26:58下载
- 积分:1
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dhan20correct27
series compensator facts devicesd
- 2009-12-01 18:48:00下载
- 积分:1