Over the years, I have seen too many on-site programs, especially in the area of PLC sequential control, where the choice of variable types is poor, leading to numerous pitfalls. A few days ago, I went to a food factory to troubleshoot, and the program almost drove me crazy. They used a bunch of BOOL … Read more
Last week, I helped a colleague solve a problem with his temperature control system on the production line, which was frequently malfunctioning. After some investigation, it turned out that the variable type was not selected correctly, causing the decimal part to be truncated. This incident reminded me that we must discuss the topic of variable … Read more
Attention all workers! Today, I want to take you to witness a dramatic scene in the tech world—a once-glorious cloud computing is being overshadowed by its own offspring, Edge AI. This is not a family drama, but a revolution in data processing efficiency! Imagine this: cloud computing is like an old department store in the … Read more
Source | 51CTO What is edge computing? How does it differ from traditional cloud computing services? When might edge computing be the right choice for businesses? Edge computing is a form of cloud computing, but unlike traditional cloud computing architectures that centralize computing and storage in a single data center, edge computing pushes computing or … Read more
Introduction to MQTT MQTT (Message Queuing Telemetry Transport) is a lightweight messaging protocol based on the publish/subscribe model, designed for low-bandwidth, high-latency, or unreliable network environments. It is widely used in the Internet of Things (IoT), mobile applications, and distributed systems to enable efficient communication between devices. By reducing data transmission volume and simplifying communication … Read more
Learn Assembly Language / Comprehensive Review 3, 5, 7, and 8 are programming question sources. The compulsory exam format at our Nanchang campus consists of 20 points for multiple choice, 30 points for short answers, and 50 points for programming. You can find the PDF version of this article in the group files or database. … Read more
Python Basics: Unpacking • Learning Objectives 🎯 • Master<span>basic unpacking</span>, <span>extended unpacking</span>, <span>dictionary unpacking</span>, and other operations • Understand the operation of<span>function parameter unpacking</span> • Comprehend its practical applications in data processing 1. Knowledge Points Detailed 📚 1.1 Basic Concept of Unpacking Unpacking is a powerful and practical feature in Python that allows us to … Read more
Hello everyone! Today we will discuss how to effectively use C++ exception handling in Excel data processing. 1. Why is Exception Handling Necessary? Imagine you are importing a 500MB Excel file and suddenly discover that the file is corrupted—an application without exception handling would crash directly, while one with exception handling can gracefully inform the … Read more
Source | IoT Home Due to the technical advantages of edge computing, it has received significant attention in the industrial sector. Currently, the most innovative companies are deploying edge intelligent IoT. Grand View Research (a U.S. consulting firm) predicts that by 2027, the market value of edge computing will reach $43.4 billion, with an annual … Read more
SQL: create table School # Create table( `SchoolId` char(5) NOT NULL comment 'Primary key, school number', # Manually input, can also be designed to auto-increment, 5 characters, numeric, or a combination of numeric and characters, with code restrictions when saving data in text. `SchoolName` nvarchar(500) NOT NULL DEFAULT '' comment 'School name', `SchoolTelNo` varchar(8) NULL … Read more