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Digression: it was supposed to be posted on Acwing, but I really won't use MARKDOWN on Acwing to post it on CSDN Matrix fast power Briefly introduce the following matrix fast exponents (also help yourself to review the following, and those who have already learned to skip by themselves) Principle: A recursive matrix C is mentioned from the r ...

@[TOC] (non negative matrix factorization practice) 1. Application Overview NMF can be applied in a wide range of fields because it has a good explanation of the local characteristics of things. In many applications, NMF can be used to discover image features in database, which is convenient for rapid and automatic recognition;It can discove ...

preface   I finally finished my final homework, I can't catch me (No. last time I talked about solving linear equations by LU decomposition, but sometimes when the equations are incompatible, the conventional method will fail. At this time, we can use the least square method. Of course, for matrix fitting, we can directly calculate th ...

introduction   this paper wants to solve the following problems: there is a two-dimensional matrix X = { x 1 , x ...

reference resources: https://blog.csdn.net/whereismatrix/article/details/104569080 brief introduction Aliasing means that in the assignment expression, an Eigen object (matrix, array, vector) appears in both lvalue and rvalue expressions, such as v = v*2; m = m.transpose();； Alias confusion can cause errors and problems; Here we will int ...

principle   in this article, let's introduce full rank factorization, which is defined as follows: A ∈ F m × n ...

1, Introduction to particle swarm optimization 1 Introduction The group behavior of birds and fish in nature has always been the research interest of scientists. Biologist Craig Reynolds proposed a very influential bird swarm aggregation model in 1987. In his simulation, each individual follows: avoid collision with neighboring individuals: ma ...

Analytic hierarchy process (AHP) is a decision-making method that decomposes the elements related to decision-making into levels such as objectives, quasi indicators and schemes, and carries out qualitative and quantitative analysis on the basis of sub levels. This paper describes the implementation process of R through an example. summary ...

subject 40 students need to be assigned to 10 dormitories. We got these 40 students through the questionnaire As shown in the figure below, the complete data is in excel: How to divide dormitories can ensure that the number of common hobbies of students in different dormitories and the same dormitories are distributed as evenly as poss ...

☘ preface ☘ Today is the seventh day of the nine day training. I will record the learning contents and problem solutions and strive to be the class representative 0.0 Link: LeetCode zero foundation guide (Lecture 8) two dimensional array 🧑🏻 About the author: a young man who changed from industrial design to embedded ✨ Contact: 2201891 ...