timerring
Parameter Estimation
February 2, 2025 · 5 min read · Page View:
This is the notes for the lecture of Parameter Estimation.
...Two Random Variables
February 1, 2025 · 0 min read · Page View:
This article is about the two random variables and their properties.
...Further Understanding of Proc
February 1, 2025 · 3 min read · Page View:
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.
The Iftop
January 30, 2025 · 1 min read · Page View:
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.
Random Variables
January 28, 2025 · 2 min read · Page View:
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.
...Repeated Trials
January 28, 2025 · 5 min read · Page View:
This article is mainly about Bernoulli Trials and its properties.
...Probability and Its Axioms
January 27, 2025 · 6 min read · Page View:
This article is about the probability and its axioms.
...CPU can only see the threads
January 23, 2025 · 12 min read · Page View:
In python, due to the GIL (Global Interpreter Lock), which is a mutex and ensures only one thread can execute at a time, so the multiple threads parallel execution is not supported under the CPython interpreter. But what about the multiple processes? What is the difference between them? How to choose the right method? Do you know the coroutine? Let’s explore it together.
...Go Common Test
January 22, 2025 · 2 min read · Page View:
The test methods in Go mainly include three types: unit test, benchmark test, and example test.
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