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Well, to understand why the covariance matrix of a population is always positive semi-definite, notice that: \[\sum_{i, j=1}^n y_i \cdot y_j \cdot \op 阅读全文
posted @ 2023-12-20 09:21
ChrainY
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cross-covariance In the case of complex random variables, the covariance is defined slightly differently compared to real random variables. For comple 阅读全文
posted @ 2023-12-19 12:01
ChrainY
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Prof. YUAN Yaxiang was elected as a new CAS (Chinese Academy of Sciences) academician. Prof. YUAN graduated from Xiangtan University, and got his Ph.D 阅读全文
posted @ 2023-12-19 11:46
ChrainY
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标 题: Re: 说实话，c++标准整体晚了十年 发信站: 水木社区 (Thu Dec 14 10:34:24 2023), 站内 我还是那句话 c++主要问题就是编译太慢 所以开发迭代学习都慢 有了好的标准库，也无法改变编译慢的问题 【 在 lwp 的大作中提到: 】 : 从C++98提出stl之 阅读全文
posted @ 2023-12-14 19:16
ChrainY
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https://zserge.com/posts/jvm/ https://dogankurt.com/dcc.html 阅读全文
posted @ 2023-12-11 14:07
ChrainY
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use JGraph and develop a BPM-like simulator. For developers, use eclipse extension. It will integrates python, c++ and JGraph. 当用simulink，考虑网络只是一个黑盒。D 阅读全文
posted @ 2023-12-10 18:30
ChrainY
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maven problem: https://blog.csdn.net/dongpo11/article/details/120254281 阅读全文
posted @ 2023-12-10 18:11
ChrainY
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intellij: matlabcontroldemo; MatlabControlExample.java grapheditor.java C:\Users\Administrator\Downloads\jgraphx-master\src\com 阅读全文
posted @ 2023-12-10 17:54
ChrainY
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https://thecloudstrap.com/simulink-tutorial-5/ 阅读全文
posted @ 2023-12-10 12:03
ChrainY
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https://www.youtube.com/watch?v=WxFBXEZo0VI&ab_channel=HighVoltageEngineeringbyMGNiasar https://ww2.mathworks.cn/help/simulink/ug/creating-block-libra 阅读全文
posted @ 2023-12-10 11:55
ChrainY
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