Graduation project Intelligent access control system based on single chip microcomputer
1 Introduction
Hi, everyone, the senior will introduce to you a microcontroller project made by the senior today.
Access Control System Based on SCM
You can use it for course design or graduation design
2 Subject background
The basic components of the access control system mainly include identification, sensing and alarm, processing ...
Posted by matchew on Mon, 26 Dec 2022 00:12:46 +0300
RabbitMQ Day 1 Basics 4 RabbitMQ Working Mode 4.4 Topic Wildcard Mode & 4.5 Working Mode Summary
RabbitMQ
[Dark horse programmer RabbitMQ full set of tutorials, rabbitmq message middleware to actual combat]
Day 1 Basics
4 RabbitMQ working mode
4.4 Topic wildcard mode
4.4.1 Mode Description
look at the documentation
Compared with Direct, Topic type can route messages to different queues according to RoutingKey. It's just ...
Posted by scott532 on Sun, 25 Dec 2022 17:52:23 +0300
Redis overview installation
# Redis overview installationApplication ScenarioCooperate with relational database for cacheVarious data structures store persistent dataRedis installationinstalled versioninstallation stepsBackground start (recommended)foreground startRedis introduces related knowledgeRedis is an open source key-value storage system.Similar to Memcached, it s ...
Posted by konrados on Sun, 25 Dec 2022 10:52:01 +0300
How threads in the thread pool are reused
Preface
I believe everyone knows the relationship between processes and threads. I won’t explain too much here. Since a process is composed of multiple threads, the thread pool is composed of several thread queues. The concurrency is relatively high. In some scenarios, we usually create a thread pool to perform tasks, instead of creating ...
Posted by cesarcesar on Sat, 24 Dec 2022 13:42:28 +0300
Reference counting of smart pointer shared_ptr
Previous Article 🔗 smart pointer unique_ptr Introduced unique_ptr, and the main difference between shared_ptr and unique_ptr is that multiple shared_ptr can manage the same object, which is realized through copy constructor and reference counting mechanism.
shared_ptr(const std::__1::shared_ptr<_Tp> &);
shar ...
Posted by creatives on Fri, 23 Dec 2022 21:12:22 +0300
tensorflow basic concepts and basic operations
The relationship between op and tensor
op is the node on the graph, and the line is the tensor. op inputs tensor, and also outputs downstream tensor As each tensor, there will be an op attribute (attribute), the op represents the calculation output of this tensor. for example:
In [74]: with tf.Session() as sess:
...: zer = tf.zeros(sh ...
Posted by Aliz on Fri, 23 Dec 2022 20:42:41 +0300
Front-end necessary skills--about cross-domain (cross-origin) problems and solving cross-domain problems
What is cross-domain/cross-origin?
What does cross-domain mean? What does cross-origin mean? It seems that I have only heard of cross-domain but not cross-origin. In fact, these two are the same thing
The cross-domain problem refers to the problem that different sites cannot call each other using ajax. The essence of the cross-domain problem ...
Posted by irishmike2004 on Thu, 22 Dec 2022 23:18:10 +0300
Flutter: 3 minutes to teach you to build a beautiful UI interface
Summary
This article uses a simple example to gradually introduce how to build a beautiful layout in Flutter. Through this article, you will learn the following points:
How Flutter's layout mechanism worksHow to lay out widgets vertically and horizontallyHow to layout Widget s in Flutter
This document mainly introduces how to make layout ...
Posted by web_noob on Thu, 22 Dec 2022 20:31:47 +0300
SpringBoot global exception handling
1. Types of exception handling
I roughly divide a request into three stages to handle global exceptions separately.
Before entering the Controller, for example, requesting an address that does not exist, 404 error.When executing @RequestMapping, before entering the logic processing stage. For example, the passed parameter type is wrong.When a ...
Posted by dpluth on Thu, 22 Dec 2022 20:27:24 +0300
.net Revisiting the Past and Knowing the New: [10] CodeFirs, DBFirst for Getting Started with the .NET ORM Framework EFCore
Foreword: This series is about learning .net related knowledge by myself in order to keep up with the pace of .net cross-platform. The current working reason is basically below .net Framework4.7, so I have this series of learning summary, but it is not from The basic C# syntax and basic knowledge started, but around the important design and dif ...
Posted by Bah! Name on Thu, 22 Dec 2022 17:23:01 +0300