Knowledge representation: Use computer symbols to describe the knowledge in the human brain, and simulate the reasoning process of the human brain through operations between symbols. Semantic Web Core: RDF OWL knowledge representation method ? First-order predicate logic representation ? Production rule notation ? Frame notation ? Semantic Web Notation ? Distributed knowledge representation Predicate […]
Docker implements mysql master-slave replication (huge details!!!)
Docker implements mysql master-slave replication (huge details!!!) Create a new host service container instance 3307 Enter the /mydata/mysql-master/conf directory and create my.cnf After modifying the configuration, restart the master instance Enter the mysql-master container Create a data synchronization user in the master container instance Create a new server container instance 3308 Enter the /mydata/mysql-slave/conf directory […]
Using Arduino to interact with the MH-Z series CO2 sensor: Detailed steps and C++ code implementation of the smart infrared carbon dioxide module
1. Introduction As environmental monitoring increases day by day, carbon dioxide sensors play a vital role in various applications such as agriculture, meteorology, and indoor air quality monitoring. The MH-Z series sensors are a popular choice on the market because they provide accurate, reliable and low-cost CO2 measurements. In this article, we’ll take a closer […]
A limitation description and avoidance of master-slave replication in GreatSQL
1. Background Let me share a pitfall of a master-slave replication limitation encountered in project operation and maintenance. The project’s architecture is a master cluster + a disaster recovery cluster, and each cluster is a master-slave model. The synchronization between the main cluster and the disaster recovery cluster uses master-slave replication. According to business requirements, […]
what-is-state-and-why-should-we-care-about-it-4o95
Original address: https://dev.to/reedbarger/what-is-state-and-why-should-we-care-about-it-4o95 To build any serious JavaScript application, you must understand a concept that confuses many developers – state. ## [What is status? ](https://dev.to#what-is-state) If you’ve tried learning React or Vue, you know that state is an important concept in these libraries. Many JavaScript developers try to learn a library before figuring out what […]
uniapp uses scroll-into-view to implement anchor positioning and scroll monitoring functions [floor effect/side navigation linkage effect]
Big guy website: https://blog.csdn.net/weixin_47136265/article/details/132303570 Effect Code <template> <!– There are 2 bugs in this, they have been solved, what you need to know 1. This.tabIndex = index != -1 ? index : 0; in the scrollEvt(e) method in methods 2. The height of .main in the style: calc(100vh – 300px); This style prevents the bug […]
After three months of outsourcing, the technology has deteriorated significantly. . . . .
Let me talk about my own situation first. I am a college student. I entered a software company in Guangzhou through school recruitment in 2017 and worked as a functional tester for nearly 4 years. At the beginning of this year, I felt that I could not continue like this and stay in a comfortable […]
It’s that simple to implement a Python+Selenium automated testing framework
First of all, you need to know what Selenium is? Selenium is a browser-based automated testing tool that provides a cross-platform, cross-browser end-to-end web automation solution. Selenium mainly consists of three parts: Selenium IDE, Selenium WebDriver and Selenium Grid. Selenium IDE: An extension for Firefox that can record and playback, and export the recorded operations […]
Hive-Command line CDH access to hive with kerberos enabled
1. Access through hive user Switch user to hive [root@slave conf]# su – hive Last login: Friday April 12 13:59:19 CST 2019pts/1 [hive@slave ~]$ You can enter hive by directly typing hive on the command line. [hive@slave ~]$ hive log4j:WARN No such property [maxFileSize] in org.apache.log4j.DailyRollingFileAppender. Logging initialized using configuration in file:/etc/hive/2.6.5.0-292/0/hive-log4j.properties hive> 2. Other […]
How to create bootable macOS Sonoma installation media
How to create bootable macOS Sonoma installation media How to Create a Bootable macOS Installer | How to Make a macOS USB Startup Disk On September 26, 2023 (early morning on the 27th, Beijing time), the official version of macOS Sonoma has been released. Please visit the original link: https://sysin.org/blog/macos-createinstallmedia/ to view the latest version. […]