Algorithm {Maximum matching of selected points in the interval} Maximum matching of selected points in the interval Definition Given an interval set A (each interval [l,r] is an integer), you need to select a point set P from the real number domain so that there is a subset SA of A, satisfying: There is a […]
Tag: points
Javascript uses canvas to draw curves, arrows, etc. between two points
Javascript uses canvas to draw curves and rectangles between two points, and draw text in the rectangle to achieve center alignment and arrow drawing. The effect is as shown below: 1. HTML, the code is as follows <canvas id=”canvas” width=”1000″ height=”600″></canvas> 2. The css code is as follows: canvas {<!– –> display: block; width: 1000px; […]
WEBGL Special Topic-3D Special Effects-Drawing Wave Points
In this WebGL topic, we will learn how to use WebGL to create a 3D wavy point effect. We will use vertex and fragment shaders along with WebGL buffer objects and textures to create this effect. First, we need to define a triangle mesh and calculate the value of a wave function at each vertex. […]
osg realizes the movement of objects along the Cardinal spline trajectory curve generated by control points.
Table of Contents 1 Introduction 2. Preliminary knowledge 3. Use osg to implement three-dimensional Cardinal curve 3.1. Tools/Materials 3.2. Code implementation 4. Description 1. Preface When designing vector patterns, we often need to use curves to express the shape of objects. Simply drawing with mouse tracks is obviously insufficient. So we hope to implement such […]
A must-have for YOLOv5 to gain points! Improved loss functions EIoU, SIoU, AlphaIoU, FocalEIoU, Wise-IoU
Table of Contents 1. The role of improving the loss function Second, specific implementation 1. Improving the role of loss function The role of the YOLOv5 loss function is to measure the difference between the predicted box and the real box, and update the parameters of the model based on these differences. It helps the […]
In Sarscape version 5.6, external control points are imported, precise orbit files are written, and GACOS is used for atmospheric phase.
PART1: Import external GCP points into SARscape for orbital refinement https://www.cnblogs.com/enviidl/p/16524645.html During SAR processing, GCP point files are sometimes added. The control points used in SAR processing are divided into two categories: geometric control points (Geometry GCP) used to correct geographical location and control points (Refinement GCP) used for orbit refinement. . Orbital refinement control […]
Large files are uploaded in parts, resumed at breakpoints, and MD5 determines whether to upload.
Install dependencies pnpm install spark-md5 pnpm install @types/spark-md5 -D Multiple upload and breakpoint resume function definition CHUNK_SIZE = 10 * 1024 * 1024; // 10M getFileMD5(file: File) {<!– –> const fileReader = new FileReader(); // Get the file fragment object (note its compatibility, it is written differently in different browsers) const blobSlice = File.prototype.slice || […]
Transformation matrix of points in 2D coordinate system (translation, scaling, rotation, miscut)
This article reprints the article of the same name written by Zhuo Bufan on Zhizhihu. I have run the code described in it and added some comments to make it easier to understand. 1. Translation In 2D space, we often need to translate a point to another position. Assume a point P in space, expressed […]
Implement user registration and login functions based on TCP network programming (technical points: collection, IO stream, multi-threading, network programming)
Client code: public class Client { private final static String SERVER_IP = “localhost”; private final static int SERVER_PORT = 8962; public static void main(String[] args) { Socket socket = null; ObjectInputStream objectInputStream = null; ObjectOutputStream objectOutputStream = null; try { socket = new Socket(SERVER_IP,SERVER_PORT); System.out.println(“Connection to server successful” + socket.getInetAddress().getHostAddress()); objectOutputStream = new ObjectOutputStream(socket.getOutputStream()); objectInputStream […]
springcloud+vue3 implements multipart upload and resumes upload at breakpoints
Background When working on some application-level service platforms, sometimes users need to upload a larger file, but after the upload fails, they need to support uploading from the failed point next time. At this time, endpoint resume and multi-part upload need to be used. s solution. This article introduces a strategy to implement this scenario, […]