March 15, 2025
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20 min read
Compared to deterministic model, which is specified by a set of equations that describe exactly how the system will evolve over time. In a stochastic model, the evolution is at least partially random and if the process is run several times, it will not give identical results.
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March 5, 2025
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16 min read

This is a quick-start essay for LangChain and RAG which mainly refers to the Langchain chat with your data course which are taught by Harrison Chase and Andrew Ng.
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February 18, 2025
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5 min read
This article is a summary of the random walks in the book “Random Processes” by Gregory F. Lawler.
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February 2, 2025
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2 min read
February 2, 2025
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5 min read
This is the notes for the lecture of Parameter Estimation.
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February 1, 2025
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0 min read
This article is about the two random variables and their properties.
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February 1, 2025
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3 min read

The /proc in Linux is a kind of Pseudo file system (also known as Virtual File System), what it saves is a series of special files that store the current running state of the kernel, and the user can check the hardware info and the runnning processes via the files, even adjust some files to change the state of running kernel. The files in /proc will be refresh in RAM, so the files’ size is 0 bytes.
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January 30, 2025
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1 min read

I frequently use ifconfig and cat /proc/net/dev to examine network information. However, today, my cloud server crashed unexpectedly. I reached out to the cloud support for assistance. The engineer utilized iftop to analyze the situation. After the issue was resolved, I started to consider using this tool. Now, let’s take a closer look at this powerful utility.
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January 28, 2025
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2 min read
This article introduces the common distribution functions both continuous and discrete. Besides, the basic knowledge of conditional distribution such as total probability and Bayes’ Theorem is also introduced. The most important part are the Normal Approximation and Poisson Approximation of the Binomial Random Variable.
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January 28, 2025
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5 min read
This article is mainly about Bernoulli Trials and its properties.
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