Tag：formula

Time：2021612
By Rashida nasrin suckyCompile VKSource: medium Neural networks have been developed to simulate the human brain. Although we haven’t done that yet, neural network is very effective in machine learning. It was very popular in the 1980s and 1990s and has become more and more popular recently. The computer is fast enough to run a […]

Time：202152
Interactive segmentation practical knowledge note 2 How to select the loss function is one of the problems that must be considered when training network in deep learning. In recent years, focal loss is very popular in segmentation, but many projects still use basic dice, crossentropy and other basic loss functions, and the effect difference is […]

Time：202151
Next to “weekly canvas animation” — wave motion Circular motion can be divided into two basic formsCircular motionandElliptical motion。Before explaining circular motion, the essential mathematical formula is about to come. So, ladies and gentlemen, please protect your knees. It doesn’t matter if you don’t understand, just understand the principle. Of course, can understand is the […]

Time：2021423
Author: barrior In canvas, it is easy to fill the text with horizontal or vertical linear gradients, while the gradients with angles are much more complex. As shown below, suppose the width of the text rectangle isW, Gao WeiHThe coordinates of the upper left corner areX, Y。 Guess and answer Give two answers: The correct […]

Time：2021413
76 cm to FT in If the values of foot and inch are known, the corresponding meter is (foot + inch / 12) × 0.3048. Now, if the user enters centimeters, what are the feet and inches corresponding to the English length? Don’t forget that one foot is 12 inches. analysis The first time I […]

Time：2021323
GitHub  Demo  Blog  Original link preface When my team developed the tax system module, I found that they needed to spend 80% of their time to solve the calculation problems, especially in the calculation in the grid Write the foreground JS code (because the user’s input in the table will affect other […]

Time：2021321
What is RSA In the previous article, we talked about AES algorithm. AES algorithm is a symmetric encryption algorithm. In this paper, we will introduce a very common asymmetric encryption algorithm RSA. Asymmetric encryption algorithm, also known as public key cryptography algorithm, encrypts and decrypts plaintext ciphertext by generating public and private keys. RSA’s name […]

Time：2021314
1014. Best sightseeing combination Title Source: leetcode https://leetcodecn.com/problems/bestsightseeingpair subject Given a positive integer array a, a [i] represents the score of the ith scenic spot, and the distance between two scenic spots I and j is J – I. The score of a tourism combination composed of a pair of scenic spots (I < J) […]

Time：202133
As we said earlier, ttest is a test method used to compare whether there is a significant difference between two means. This article introduces the types of ttest and the specific Python implementation code. Ttest is to compare the difference between two means. The difference of different kinds of ttest is actually the difference of […]

Time：2021214
vuegridcanvas Vue component, a form component based on Vue, is mainly used to solve the performance problem of large amount of data table rendering. It uses canvas to draw tables, and supports functions like batch selection, copy, paste, delete, realtime editing of Excel. At present, it is still improving. I hope your star will be […]

Time：2021128
import java.math.BigDecimal; import java.util.*; /** *Simple formula calculation tool, only support +, , *, /, () * @author ningyongli * @date 20200713 */ public class CalculateUtils { private static final Map<String, Integer> PRIORITY_MAP = new HashMap<>(); private static final List<String> OPERATOR_LIST = new ArrayList<>(); static { PRIORITY_MAP.put(“(“, 0); PRIORITY_MAP.put(“+”, 5); PRIORITY_MAP.put(““, 5); PRIORITY_MAP.put(“*”, 10); PRIORITY_MAP.put(“/”, […]

Time：2021117
catalog 1、 Linear regression 2、 Mathematical principle of gradient descent method 3、 Optimization of gradient descent method 4、 Python implementation 1、 Linear regression for a detailed introduction of linear regression, please refer to my last blog postLinear regression: the realization of least square method. In “linear regression: the realization of the least square method”, […]