2020年1月4日
A tree in real life has many branches and leaves. In fact, the concept of trees is widely used in machine learning, covering classification and regression. In decision analysis, decision trees are used to visually represent and make decisions. As the name implies, a decision tree is a tree-shaped decision model.……
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2020年1月4日
The term “normalization” is an informal expression in statistics, so the phrase “normalized data” can have multiple meanings. In most cases, normalizing data eliminates units of measurement, making it easier to compare data from different sources.……
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2020年1月3日
This article introduces a very important dimensionality reduction method in machine learning—Principal Component Analysis.……
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2020年1月2日
It is always known that bit and byte are two concepts, one is binary digit, and the other is a byte unit consisting of 8 bits. However, in practical situations, people still confuse bit and byte in various network speed abbreviations. This article summarizes the knowledge I found.……
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2019年12月27日
90% of drivers believe their driving skills are above average, 90% think their IQ is above the average IQ of the population, and the key is this can actually be consistent with real data — it’s true and not fabricated.……
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2019年12月23日
s-tui is a free and open-source command-line UI tool for monitoring computer CPU. It can monitor CPU temperature, frequency, etc. in real-time and display it graphically. This is a Python tool that can be installed via pip, but requires root permissions. It can be used via SSH login to monitor CPU status graphically.……
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2019年12月9日
Getting back on track, today’s tutorial by Chunjiang Muker shows how to automatically stream Douyu live on CentOS 7 to achieve 24/7 uninterrupted streaming.……
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2019年12月8日
A few days ago on WeChat, I discovered that Tongji University actually has its own open source software mirror site. Our lab servers are still using Alibaba Cloud’s CentOS 7 mirror. Wouldn’t it be much faster if we switched to the university’s mirror? So how to change CentOS 7 public repo to Tongji University’s mirror?……
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2019年12月4日
Virmach’s Black Friday machines appear and disappear rapidly. For hosting enthusiasts, constantly checking current VPS prices and deciding whether to buy is troublesome. This article lists Black Friday machine configurations using sklearn and predicts VPS prices with machine learning to alert users if prices are cheap.……
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2019年12月2日
During the recent Black Friday sales, I grabbed a special machine from Virmach, so I thought of testing its performance by running some VPS performance and network tests since the machine looks pretty good.……
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2019年11月24日
How to batch replace strings in Linux? At first, I thought about using sed with -r or some iterative method, but found sed doesn’t support iteration parameters. So, I use find to get files and sed to replace strings.……
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2019年11月17日
During Linux system development, sometimes your program might crash or be stopped. To keep it running continuously, adding the program to the service list is a very good practice.……
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