There are some research from my interests.
2024-03-02 ｜ #Words: 2726
How to clone system disk to a smaller hard drive or SD card on Raspberry Pi, including partition, set up and repair boot files.
2023-11-05 ｜ #Words: 1680
This blog shares some reviews and tests of Raspberry Pi 4B. ZhongUncle compares it with Mac mini 2018 i5 in many aspects.
2023-08-14 ｜ #Words: 2112
This article aims to provide a low-level explanation of APFS, the file system used by Apple devices. Because I noticed that there was a lack of documentation on how APFS works in details, so I do some research and share my findings.
2023-07-19 ｜ #Words: 2150
In hard disk performance, IOPS is a very important parameter. In terms of speed, this is the most important parameter to pay attention to, rather than the sequential read and write performance or random read and write performance that many people measure.
2023-06-23 ｜ #Words: 1431
BDMV is the format used by Blu-ray discs. This format cannot be played using playback software, and a hard disk player, which is a specialized device, must be used. But the most classic ffmpeg can convert it to other formats and maintain the same bit rate and definition, so that it can be viewed easily.
2023-06-10 ｜ #Words: 2404
Recently, I found I was not very clear about the difference between GNU GCC and Clang. It affected implementation and learning somethings, so I spent free time in some days to research it carefully.
2023-05-31 ｜ #Words: 677
Recently, I saw some live broadcasts on Douyin that were really interesting, and I wanted to record them. So I studied how to record these live broadcasts. There are two methods: recording the screen and downloading from the push source.
2023-04-21 ｜ #Words: 2545
I encountered many problems when using VM Fusion to install Plan 9 on Mac. The official documents and some foreign blogs from the past two years were not clear, and even misleading (some situations have changed). So I am writing this article to help others who also encounter the same problem.
2023-03-16 ｜ #Words: 1123
ZhongUncle records what I find when using New Bing (GPT-4). Today New Bing called Bing Chat and can do more thing, but its mistakes are more often.
2023-02-17 ｜ #Words: 570
ZhongUncle records some performance of NN and know why bandwidth of gpu is important for Machine Learning.
2023-02-09 ｜ #Words: 755
I recently borrowed an A7R. This is my first time using a professional camera (not a card camera), and it is full frame tensor. So I spent some time to learn how to use it and how it works under various settings.
2023-02-03 ｜ #Words: 4222
When I was organizing my disk, I have a question: What is GIFs classified as? Static image files or video files?Because if you put it in a video, GIF is classified as a static image usually and is composed of images; if you put it in an image, it shows animations. Then I have new problem: Why GIFs shows animations, but be classified as static images?
2023-01-10 ｜ #Words: 512
Recently, I need to learn Java. Due to personal habits, I just want to use the terminal for development instead of using an IDE. But I never expected that I would be tricked by the official website once, and the downloaded Java could not be developed normally. So I wrote this article to explain how to configure it. It's very simple, just find the right official website.
2022-12-06 ｜ #Words: 797
Maybe you like me have a question: Why heap sorting using a binary tree, but it is called heap sorting, rather than tree sorting? Because the predecessor of heap sort is called Tree Selection Sorting, it also uses a tree structure, but is slightly simpler. Finally we will talk about why invent heap sorting to replace tree sorting.
2022-10-10 ｜ #Words: 1857
If you are studying or engaged in data analysis-related, you must have used or been told to use R language. But with so many languages for data analysis, why use R? Because R can output very nice charts for publication. It may not be necessary for blogs, but it is necessary for publications such as papers and books. After all, the charts in most publications are not in color or flashy.
2022-10-04 ｜ #Words: 2899
When I was learning quicksort algorithm, I found there are many style of code. I was very curious why. So I went to read Introduction to Algorithms to search for answer. Finally I found the reason be related to the development history of quicksort.
2022-09-03 ｜ #Words: 456
There are two kinds storage structures in data structures that are easily confused, namely index storage structure* and hash storage structure (hash storage structure) You can find corresponding keyword according to address. It can be understood as a yellow pages. You can find someone's phone number based on name. So index storage is also called direct addressing
2022-06-16 ｜ #Words: 2578
Do you wonder why Type-C in difference protocols is in difference speed? I will tell you why the Type-C have different bandwidths under different protocols from pin definitions, protocols, etc.
2022-02-13 ｜ #Words: 1425
Recently, I plan to use the open source and free SQLite as a database to save money. And due to personal habits, I prefer the command line, so I record how to use SQLite in command line.