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The Basic Relation Calculation in Database
This article mainly introduces the basic operations and examples of relational algebra such as union, difference, selection, projection and join.
Compound Interest and 72 Formulation
Compound Interest Formula and The Rule of 72 are commonly used tools in finance for calculating investment growth and estimating the time it takes for an investment to double.
The Problem of Weighing Coins with Balance.
The 'Coin Weight Problem' aims to solve the following mathematical problem: Among N coins, one coin has a different weight. with a balance scale, ensure finding the different coin with the fewest number of weighings.
The Introduction to Bernoulli Number
Introduction, derivation and proof of Bernoulli numbers
System Reliability Model
Outlines computer system reliability, including series, parallel components, and N-modular redundancy.
Equivalence of Rectangular and Trapezoidal Approximations
Discusses the equivalence and error estimation in integrating piecewise continuous functions using rectangular and trapezoidal approximations.
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Let's Implement a Video Server with node.js and Ffmpeg
Node.js utilizes an event-driven and non-blocking I/O model, which enables it to efficiently handle a large number of I/O requests and concurrent connections. This is crucial for a streaming media server. Meanwhile, ffmpeg provides powerful functionality for video processing. We can leverage Node.js's powerful extension capabilities to integrate ffmpeg and create a video streaming media server.
汉字的前端字体体积优化方案
对于欧洲等基于字母文字的地区，字体优化简单，大小通常不超过 1MB。但对于东亚国家，字体尺寸是一个头疼的问题，可能会达到数兆字节甚至更多。
Coding and Error Checking of Binary Data
Concepts of Sign-Magnitude, One's Complement, Two's Complement, and Excess-n Notation, along with Parity Check and Hamming Code Error Detection Methods for Binary Data