Tag：Mathematics

Time：20201020
Opening Python language is widely used in data analysis and machine learning. However, due to the underlying characteristics of python, the low running speed of Python has been widely criticized. Among them, the wide use of numpy and pandas has promoted the speed of data processing and machine learning by several grades. However, with more […]

Time：2020103
This paper provides an introduction to these various educational software and applications. Mathematics is the core of computers. If one expects a great operating system like GNU / Linux to be precise and strict, then that’s what math does. If you’re looking for some math apps, you won’t be disappointed. Linux offers a lot of […]

Time：2020915
1. toFixed() The tofixed() method rounds number to a number of specified decimal places Most people’s first reaction is to use ToFixed (), but there is a hole in tofixed() method But the rounding rules are different from the rules in mathematics, which useBanker rounding rules The essence of the socalled banker rounding method is […]

Time：202073
In order to process the business data in the database, we need to use SQL functions to process them properly. Usually, the commonly used functions are built into the database. However, it is far from enough to rely on the builtin functions of the database. Therefore, if a database can provide userdefined functions to realize […]

Time：202039
Use of exclusive or operator Exclusive or, abbreviated as XORXOR is a mathematical operator. It applies to logical operations. The mathematical symbol of XOR is “⊕ and the computer symbol is” XOR “. The algorithm is as follows: a⊕b = (¬a ∧ b) ∨ (a ∧¬b)If a and B are two valuesInequalityXORThe result is 1。If […]

Time：2020228
The comparison of characters, numbers and special symbols depends on the ASC II table. There were 127 in this table, and then some were expanded to include Kiki ‘s strange symbols. ASC II table https://baike.baidu.com/item/ascii/309296? Fr = Aladdin × 3 English: http://www.ascii.com/ 1. Compare integer and integer, the same as mathematical rules $a = […]

Time：202024
Author: Xiang Cheng @ HUST 1. Zero knowledge proof Zero knowledge proof is one of the most eyecatching technologies in cryptography in recent years. In the field of blockchain, it is more highfrequency words. However, due to its more mathematical knowledge, it is difficult for ordinary developers to understand, and the data is mostly in […]

Time：20191122
Now big data, artificial intelligence, data analysis and many other technical posts all have certain requirements for mathematics. Mathematics is becoming more and more important. Many people also begin to try to learn mathematics. Suddenly, they have the idea of combining python programming to learn mathematics in mind. I searched a lot of relevant materials […]

Time：20191114
Someone said it was an interview question!I didn’t say that, but it makes sense—Lu Xun ▍ what is an activation function In neurons, input is summed by weighting, and then a function is applied, which is the activation functionActivation Function。 The location of the activation function in the neural network is shown as follows: ▍ […]

Time：2019111
Today’s knowledge (September 14, 2019) – day 151 [HTML] for example, how to add a mathematical formula to a page? [CSS] what are the properties of CSS3 to achieve text effects? What are the ways to implement asynchronous programming in [JS]? Which is recommended? [soft skills] the customer complains that some functions of the website […]

Time：20191023
Review the iterative methods in js. var arr = [1, 2, 3, 4, 5, 4, 3, 2, 1]; // all items are false, or false // otherwise until the first value is true, Return true // similar to ‘or’ in math console.log(arr.some(item, index, array) => { console.log(‘type=some,’ + ‘item=’ + item + ‘,index=’ + index […]

Time：2019107
Abstract:What kind of mathematical basis does machine learning need? How to practice highlevel machine learning? Come and see. So far, we are not entirely clear about what mathematical level we need to start machine learning, especially those who do not study mathematics or statistics in school. In this article, my goal is to propose the […]