Current status of knowledge representation models – related to symbolic representation

The concept of the Semantic Web was proposed by Tim Berners Lee, the inventor of the World Wide Web, in 1996. The goal is to convert current information into machine-friendly language. The Semantic Web is not an independent network, but an extension of the current network. It empowers The clear meaning of information makes it […]

[Linux] Process status, process priority and related concepts

Article directory process basic concept Describe Process-PCB task_struct-PCB type task_ struct content classification organizational process View progress Get process identifier through system call Creating a process through system calls – first introduction to fork fork principle What did the fork do? How fork views processes How fork understands the function of two return values process […]

Jetpack Compose | State status management and interface refresh

We know that the UI composable items in Jetpack Compose (hereinafter referred to as Compose) are described through functions declared by @Composable, such as: @Composable funGreeting() { Text( text = “init”, color = Color.Red, modifier = Modifier.fillMaxWidth() ) } The above code describes a static Text, so how to update the UI in Compose? State […]

Zabbix monitors nginx status page

zabbix monitors nginx status page Directory Zabbix monitors nginx status page 1.Environmental description 2. Press and hold zabbix_agent on nginx 3. Open the nginx status display page 4.zabbix web interface configuration 4.1 Create monitoring host 4.2 Create monitoring projects 4.3 Add trigger 4.4 Testing 1. Environment description Host name ip Host service zabbix 192.168.200.42 zabbix_server […]

Solve WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after co

Table of Contents Solve WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by ‘ReadTimeoutError(“HTTPSConnectionPool…’) error 1. Cause of error 2. Solution 2.1 Increase the timeout period 2.2 Use connection pool 2.3 Exception handling 3. Summary Solution to WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by ‘ReadTimeoutError(“HTTPSConnectionPool…’) error When using Python […]

Stm32f103c8t6 LED water lamp implemented based on stm32CubeMX and HAL library, and interrupt control of the working status of the water lamp

Table of Contents 1. stm32CubeMX environment construction 1.1 Install the Java environment (you need to install Java if it is not installed) 1.2 Install STM32CubeMX 2. Create a new project, configure the environment, and generate KEIL code 2.1 New construction 2.2 Pinout &Configuration (port configuration) 2.2.1 GPIO configuration 2.2.2 RCC configuration 2.2.3 SYS configuration 2.2.4 […]

Zabbix monitors nginx status page

zabbix monitors nginx status page Article directory Zabbix monitors nginx status page 1.Environmental description 2. Knowledge points involved 3. Install zabbix_agent on the nginx host 4. Open the nginx status display page 5. Enter the zabbix web page to configure the host, monitoring items, and triggers 5.1.Add host 5.2. Create monitoring items 5.3.Create triggers 1. […]

Android 12.0 adds screenshot function in pull-down status bar

Android 12.0 adds screenshot function in pull-down status bar Recently, we received a request from a customer to add a screenshot function to the drop-down status bar and support long screenshots. The specific modification points are as follows: 1. Create a new ic_screenshot.xml file in the /vendor/mediatek/proprietary/packages/apps/SystemUI/res/drawable directory: <!– Copyright (C) 2018 The Android Open […]

RK3568 driver layer implements GPIO working status control and input/output level reading

1. Application scenarios There is an 8-pin input/output pin in the new project. Setting the working mode through the io command is too complicated to read the input and output levels, so I wrote a driver to control the GPIO working mode and read the GPIO input/output levels. . 2. Driver code File name gpio-rockchip-cdev.c […]