• Smartbi of smart software: basic steps of data mining

Time：2022-5-10

data mining Concept and characteristics of Data mining refers to the non trivial process of revealing implicit, previously unknown and potentially valuable information from a large amount of data in the database. Data mining is a decision support process, which is mainly based on artificial intelligence, machine learning, pattern recognition, statistics, database, visualization technology, etc. […]

• [daily algorithm / brush through leetcode] 6 Zigzag transformation (medium)

Time：2022-4-29

Click here to view more content related to algorithmic interview~ Title Description A given stringsAccording to the given number of rowsnumRows, from top to bottom, from left to rightZFont arrangement. For example, the input string is”PAYPALISHIRING”When the number of rows is 3, the arrangement is as follows: P A H N A P L S […]

• Conway life game (cellular automata) c# console

Time：2022-2-16

original text https://www.cnblogs.com/jingjiangtao/p/14439868.html effect Rules (from Baidu Encyclopedia, Conway life game entry) At the beginning of the game, each cell is randomly set to one of “life” or “death”. Then, according to some rules, calculate the state of each cell in the next generation, and draw the life and death distribution map of the next […]

• 100 thinking models – 40 Law of large numbers

Time：2022-2-8

In the large number of repeated occurrences of random events, it often presents an almost inevitable law, which is the law of large numbers. Generally speaking, this theorem is that under the condition of constant test, the frequency of random events is similar to its probability. There is a certain necessity in chance. From the […]

• 36. Illustration: there is nothing difficult about the three laws of reflection in go language

Time：2022-1-18

Hi, everyone, I’m brother Ming. During my time of learning Golang, I wrote detailed study notes on my personal WeChat official account “Go programming time”. For Go language, I am also a beginner, so writing things should be more suitable for students who are just in contact. If you are just learning Go language, do […]

• [daily algorithm / brush through leetcode] 6. Zigzag transformation (medium)

Time：2021-11-18

clickhereYou can see more about the algorithm interview~ Title Description Returns a given stringsAccording to the given number of rowsnumRows, from top to bottom, from left to rightZFont arrangement. For example, the input string is”PAYPALISHIRING”When the number of rows is 3, the arrangement is as follows: P A H N A P L S I […]

• Programmers and architects should understand “Conway’s law”

Time：2021-5-2

Programmers and architects should understand “Conway‘s law” What is Conway’s law Conway’s law is a maxim that organizations design systems to reflect their own communication structures. It’s named after computer programmer Melvin Conway, who came up with the idea in 1967. His initial wording was: organizations which design systems … are constrained to produce designs […]

• 4.1 name attribute of function

Time：2021-1-14

About the function name attribute, different declaration methods are different, there is no rule, you can only remember it by rote

• C practical exercise topic 23 – printing diamond pattern

Time：2020-9-30

Title:Print the following pattern (diamond). * *** ***** ******* ***** *** * Program analysis:Firstly, the graph is divided into two parts: the first four lines have a rule, and the last three lines have a rule. Using the double for loop, the first level controls the row and the second level controls the column. example: […]

• What is the most popular application background data in wechat?

Time：2020-8-23

People often use the word “overnight hit” to describe stars being famous, but such star products often appear in social networks. In the first half of 2015, “Zuji”, which just entered the social network, triggered a frenzy of sharing among wechat friends and became a popular app.So, how are the “fans” behind these star apps […]

• How to write regular expression to verify the format of mobile phone number

Time：2020-8-16

1、 Access to the mobile phone number segments of the three major operators in China Segment address As shown in the figure above, we can write regular rules according to the number segments of different operators, and also can write unified verification. I mainly write unified verification here. 2、 Ideas 1. In order to get […]

• Data exploration of machine learning — data feature analysis (Pareto analysis)

Time：2020-6-6

Pareto analysis, or contribution analysis, looks for a small number of key or decisive factors in all factors. There is a common law, the 28 law. All walks of life are interpreting its profound meaning:For example:1. 80% of the company’s profits come from 20% of the best-selling products, while the other 80% of the products […]