Notes on the actual combat of uniapp project

catalog 1 project construction 1.1 new project and operation 1.2 configure basic appearance according to project effect 2. Frame up 2.1 configure tabbar 3 get data from the background 3.1 package request component 3.2 build background application 4 home page 4.1 configure basic data of home page ...

Posted on Sat, 13 Jun 2020 03:34:05 -0400 by hash1

Static routing & rip Protocol & ospf routing protocol

rip and ospf routing protocol rip routing protocol brief introduction Information protocol historical information principle edition RIPv1 RIPv2 The difference between rip and rip2 rip-1 rip-2 RIPng Protocol layering Frequently asked questions ospf routing protocol summary Implementation proce ...

Posted on Sat, 13 Jun 2020 03:24:24 -0400 by j007ha

PCA topic of R language principal component

12.3 Based on the principal component analysis of the scores of 50 students in the table below, how many comprehensive variables can be selected to represent the scores of these students in 6 courses? The data are as follows: 1. Data import and data standardization > data=read.csv('D:/R languaga_ma ...

Posted on Sat, 13 Jun 2020 02:20:51 -0400 by php_east

Slow SQL Analysis Paper

Slow Query Log Understanding slow queries mysql's slow query is a type of log record provided by mysql that records statements whose execution time exceeds the set threshold.This time-out is configurable, and the default time-out is 10s, which is then written to the log.Then combined with explain to ...

Posted on Fri, 12 Jun 2020 22:13:07 -0400 by john9292

Large Simulation of Programming Design-1

A-Chemistry Chemistry is amazing. Here are the alkyl groups. Suppose, as shown above, this alkyl group has six atoms and five chemical bonds, six atoms labeled 1-6, and then a pair of numbers a and b denotes that there is a chemical bond between atom A and atom b.This allows a description of an alkyl ...

Posted on Fri, 12 Jun 2020 21:22:51 -0400 by pgudge

MySQL Summary Subquery - Detailed

Subquery 1. What is a subquery -- Requirements: Query who is in the development department select * from emp; -- Query by two statements select id from dept where name='Development Department' ; select * from emp where dept_id = 1; -- Use subqueries select * from emp where dept_id = (select id from dept where name='Marketing Department'); ...

Posted on Fri, 12 Jun 2020 13:09:12 -0400 by JeffK

druid monitor configuration -- springBoot project

Cause: one day, my colleague's project connection pool burst At first, I thought there was a long-running sql, but after checking the DB, I found that there was no such sql at all Then I wonder if it is the calling of the third-party interface, which is suspended or not closed due to timeout. After ...

Posted on Fri, 12 Jun 2020 03:30:17 -0400 by ashbai

Python data structure and algorithm -- binary search tree

What is binary search tree Binary Search Tree (also: Binary Search Tree, binary sort tree) it is either an empty tree or a binary tree with the following properties: if its left subtree is not empty, the values of all nodes on the left subtree are less than the values of its root nodes; if its right subtree is not empty, the values of all nodes ...

Posted on Fri, 12 Jun 2020 02:29:35 -0400 by WebbieDave

Transition animation and keyframe animation in vue, and the use of animate.css And list transition

1, Transition animation (1) Whether it's switching between components, or using v-if, v-show instructions to control the display of dom, as long as you want to achieve the animation effect, you must wrap it outside and give a name attribute to specify the use of the defined animation <div id="ro ...

Posted on Fri, 12 Jun 2020 02:20:01 -0400 by bal bal

Machine learning - overview, feature extraction of data (notes)

1. The relationship among artificial intelligence, machine learning and deep learning What machine learning can do. Recommended books for learningLearning objectives 2. What is machine learning Machine learning is to automatically analyze and obtain laws (models) from data, and use laws to predict u ...

Posted on Fri, 12 Jun 2020 00:23:35 -0400 by Goose