Clock case –node splitting

HTML original code: <!DOCTYPE html> <html lang=”en”> <head> <meta charset=”UTF-8″> <meta name=”viewport” content=”width=device-width, initial-scale=1.0″> <meta http-equiv=”X-UA-Compatible” content=”ie=edge”> <title>indexHomepage</title> <style> html, body {<!– –> margin: 0; padding: 0; height: 100%; background-image: linear-gradient(to bottom right, red, gold); } .box {<!– –> width: 400px; height: 250px; background-color: rgba(255, 255, 255, 0.6); border-radius: 6px; position: absolute; left: 50%; top: […]

STM32 Getting Started Notes 11_USART serial port data packet + case: USART receives HEX data packet USART receives text data packet

USART serial port data packet Data mode HEX mode/Hex mode/Binary mode: Display in the form of raw data Text mode/Character mode HEX data packet Fixed package length, including header and tail Variable packet length, including header and tail Text packet Fixed package length, including header and tail Variable packet length, including header and tail HEX […]

BP regression forecast-taking house price forecast as an example

Reference blog post: Deep Learning – In-depth Analysis of the Introductory Classic Case “Boston House Price Prediction”_What is Gradient Descent-CSDN Blog tensorflow BP neural network Boston house price prediction_bp neural network Boston house price prediction-CSDN Blog Network training part: import numpy as np import matplotlib.pyplot as plt ##Used stochastic gradient descent method to improve efficiency […]

KingbaseES V8R3 backup and recovery case — sys_rman physical backup multi-machine recovery

Case description: After physical backup is performed through sys_rman in the production environment, a test environment needs to be built on a different machine. This case describes the detailed process and operations of physical backup on a different machine. Applicable version:KingbaseES V8R3 Node information: [kingbase@node102 bin]$ cat /etc/hosts … node101 # Production node […]

Kingbase ES cursor cross-transaction and its case

Foreword This article introduces the cross-transaction use cases of cursors in PLSQL and SQL layers, and a case study. Verified version of this article: db0=# select version(); db0-# / version —————————————- KingbaseES V008R006C007B0024 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-28), 64-bit (1 row) One, a cursor in a PLSQL block spans […]

[Transfer] OpenGL graphics rendering pipeline, VBO, VAO, EBO, TBO concepts and use cases

Graphics rendering pipeline (Pipeline) The graphics rendering pipeline refers to the entire process of processing and transforming some original data and finally outputting the data to the screen. The entire processing flow of the graphics rendering pipeline can be divided into several stages. The output data of the previous stage is used as the input […]

KingbaseES V8R6 cluster case—one master and two backup architecture single standby database outage impact test

KingbaseES V8R6 cluster case—one master and two backup architecture single standby database outage impact test Case description: For the KingbaseES V8R6 cluster, in sync mode, for a one-master-one-standby architecture, if the standby database is down, the master database transaction commit will be hung. After the wal_sender_timeout parameter (default 60s) exceeds the threshold, sync is converted […]

Bootstrap Interval Forecasting | Matlab Bootstrap Interval Forecasting provides confidence intervals for your point predictions

?About the author: A Matlab simulation developer who loves scientific research. He cultivates his mind and improves his technology simultaneously. For cooperation on MATLAB projects, please send a private message. Personal homepage: Matlab Research Studio Personal credo: Investigate things to gain knowledge. For more complete Matlab code and simulation customization content, click Intelligent optimization algorithm […]

Kingbase ES custom aggregate function and one-time rewrite case

Article summary: The SQL syntax of KES is temporarily not compatible with the creation syntax and process of Oracle’s custom aggregate function, but it can be rewritten using the syntax that KES already supports. This article organizes and briefly analyzes the principles of custom aggregate functions and interprets the sample code. And rewritten according to […]

Linux — Cascading interrupt controller registration and interrupt handling

The purpose of this article is to introduce the registration process of the interrupt controller and the processing of interrupts, and to understand the cascade interrupt controller from the perspective of the software system. Background: Arm64 processor, Linux-4.14 kernel Table of Contents 1. Macro definition of interrupt controller in kernel 1.1 IRQCHIP_DECLARE macro 1.2 IRQCHIP_OF_MATCH_TABLE […]