Fading Coder

One Final Commit for the Last Sprint

Content-Based Image Retrieval Using Color Moments, Hu Invariants, and Gray-Level Co-occurrence Matrices

A typical content-based image retrieval pipeline transforms visual data into discirminative feature vectors through three primary stages: descriptor computation, database indexing, and similarity ranking. This implementation employs a multi-modal feature fusion strategy combining chromatic statistic...

Solution to P1281 Book Copying Problem with Binary Search and Greedy Algorithm

Problem Background A common mistake when solving this problem is overly prioritizing minimizing the workload for earlier people, which could lead to some people being assigned no books (output 0 0). However, the problem test cases have been updated to guarantee every person gets at least one book to...

Resolving Excessive TIME_WAIT Connections on Windows Systems

When monitoring a Zabbix agent, an alert indicated unavailability despite the agent process running. Checking network cnonections revealed numerous TCP connections in the TIME_WAIT state, prevanting new connections to the proxy due to exhausted socket resources. In active mode, the agent initiates c...

Comprehensive Guide to Python unittest Framework

Initialization Methods setUp and tearDown These methods run before and after each test method. If you have multiple tests, setUp and tearDown execute multiple times, which can be resource-intensive. setUpClass and tearDownClass Recommended for one-time initialization of shared resources. These class...

Resolving YUM Installation Failures for lrzsz Package

When executing yum install -y lrzsz, you may encounter an error indicating a failure to connect to the repository mirrror. The output typically encludes: [root@centos ~]# yum install -y lrzsz Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile Could not retrieve mirro...

Implementing a Chinese Numeral Clock with Python's Turtle Graphics

To create a Chinese numeral clock using Python's Turtle module, first install the necessary dependencies. On Debian-based systems, run: sudo apt-get install python3-tk The clock displays hours, minutes, and seconds as Chinese characters arranged in concentric circles, updated every second. The imple...

Modifying JavaScript Pagination to Display All Pages

A webpage oirginally cnotains 20 pages of list data but only displays the first 10 pages. To modify the JavaScript injection and reload the page too show all pages, follow these steps. First, acess the source code via F12 → Sources → page-top.js. Locate the JavaScript code related to page loading. T...

Dynamic Programming for Unbounded Knapsack Problems: Coin Change, Combination Sum, and Stair Climbing

Unbounded Knapsack Fundamentals In the unbounded knapsack problem, each item can be used an unlimited number of times, unlike the 0/1 knapsack where each item is used at most once. This difference requires two key implementation changes: When iterating through the knapsack capacity, we must iterate...

Monitoring System Resources: CPU, Memory, Disk, Ports, and Processes in Linux

CPU Utilization Monitoring The top command provides a dynamic, real-time view of system processes and resource usage. Press q or Ctrl+C to exit. The initial five lines present overall system statistics. Line 1: System Summary This line mirrors the output of uptime. Current time (e.g., 10:59:33). Upt...

Implementing Custom Graphic Elements in a SCADA Configuration System

Adding a New Sidebar Menu Category To introduce a new category in the left-hand sidebar, modify the Sidebar.js file. Locate the Sidebar.prototype.categoryMenus array and add a new object. For example, to add a 'Control Components' category: Sidebar.prototype.categoryMenus = [ // ... existing categor...