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139
易语言使用139邮箱发送短信源码，应用程序编程源码，很好的参考资料。(Easy language to use 139 mailbox to send SMS source code, application programming source code, a good reference.)
- 2013-11-05 15:38:10下载
- 积分：1
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TFIDF-master
tf–idf, short for term frequency–inverse document frequency, is a numerical statistic that is intended to reflect how important a word is to a document in a collection or corpus.[1]:8 It is often used as a weighting factor in information retrieval and text mining. The tf-idf value increases proportionally to the number of times a word appears in the document, but is offset by the frequency of the word in the corpus, which helps to control for the fact that some words are generally more common than others.
Variations of the tf–idf weighting scheme are often used by search engines as a central tool in scoring and ranking a document s relevance given a user query. tf–idf can be successfully used for stop-words filtering in various subject fields including text summarization and classification.
One of the simplest ranking functions is computed by summing the tf–idf for each query term many more sophisticated ranking functions are variants of this simple model.
- 2014-02-23 09:01:44下载
- 积分：1
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4669
T2D图形系统架构源码，例程程序应用易语言的画板组件和点、线、坐标、角度等几何图形原理，采用多任务并行处理模式进行图形的架构。(T2D source graphics system architecture, the routine program application components and easy language slate points, lines, coordinates, angles and other geometric principle, the use of multi-task parallel processing mode graphics architecture.)
- 2014-10-18 11:14:40下载
- 积分：1
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formdll
atm取款机form解释例子,实录通用form的解析(atm cash machines form to explain examples of common form analytic Record)
- 2009-04-15 09:40:15下载
- 积分：1
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VC++台球厅计时收费管理系统(Access)
说明： 可以达到台球厅的管理，实用与生活之中，以及小型的台球厅(Can achieve the management of billiards hall, practical and life, as well as small billiards hall)
- 2019-05-30 09:20:30下载
- 积分：1
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多线程异步编程实例 Thread Async
多线程、异步
- 2012-12-27下载
- 积分：1
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下垂
说明： 下垂控制在逆变器型微电网控制中得到了广泛应用。当线路呈阻性时,有功功率和无功功率存在较强耦合,影响了下垂控制的性能。目前提出了两大类解决方法:一类方法通过控制参数的选取使逆变器的等效输出阻抗在基频段呈感性,但该方法的输出阻抗受制于控制参数并且存在较大缺陷;另一类方法用逆变器输出电流和虚拟阻抗计算电压降,从指令电压中减去该电压降,达到模拟实际阻抗的作用,效果更优,但对其机理缺乏阐述,且存在逆变器输出电压偏差问题。(Droop control is widely used in inverter based microgrid control. When the line is resistive, there is a strong coupling between active power and reactive power, which affects the performance of droop control. At present, two kinds of solutions are proposed: one is to make the equivalent output impedance of the inverter inductive in the fundamental frequency band by selecting the control parameters, but the output impedance of this method is subject to the control parameters and has great defects; the other is to calculate the voltage drop by using the output current and virtual impedance of the inverter and subtract the voltage drop from the command voltage to simulate the actual impedance, The effect is better, but its mechanism is lack of elaboration, and there is the problem of inverter output voltage deviation.)
- 2021-01-31 20:33:07下载
- 积分：1
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LV程序---傅里叶变换
用于labview傅里叶变换的实用例程，可自行替换函数(A practical routine for LabVIEW Fourier transform)
- 2018-01-15 12:55:51下载
- 积分：1
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FUP2算法---解决数据库更新后的关联规则挖掘
香港大学的David W.Cheung写的“A General Incremental Technique for Maintaining Discovered Association Rules”中提到的FUP2算法，用来解决数据库更新后的关联规则挖掘(University of Hong Kong, David W. Cheung wrote "A General Incremental Technique for Maintaining Discovered Association Rules" FUP2 mentioned in the algorithm used to solve the database updated Mining Association Rules)
- 2005-04-08 13:50:07下载
- 积分：1
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hon-new
When the two nucleic acid sequences, when compared, K-Estimator used to assess the number of nucleotide substitutions between the two (Divergent), including the protein coding region and non-protein coding region. Using Monte Carlo simulation estimates of confidence intervals. In molecular evolutionary studies to assess the two nucleic acid sequences is replaced by the number of nucleotides is a central issue. Accurate quantification of these data will directly affect the evolution of genetics is widely used in many experiments of reliability.
- 2013-08-04 11:42:51下载
- 积分：1
