HTML 炫酷进度条
下面是代码
<!DOCTYPE html>
<html><head><meta charset="UTF-8"><title>Light Loader - CodePen</title><style>
html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed,
figure, figcaption, footer, header, hgroup,
menu, nav, output, ruby, section, summary,
time, mark, audio, video {margin: 0;padding: 0;border: 0;font-size: 100%;font: inherit;vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure,
footer, header, hgroup, menu, nav, section {display: block;
}
body {line-height: 1;
}
ol, ul {list-style: none;
}
blockquote, q {quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {content: '';content: none;
}
table {border-collapse: collapse;border-spacing: 0;
}
</style><style>
body {background: #111;
}canvas {background: #111;border: 1px solid #171717;display: block;left: 50%;margin: -51px 0 0 -201px;position: absolute;top: 50%;
}
</style><script src="js/prefixfree.min.js"></script></head><body><script src="js/index.js"></script>
<div style="text-align:center;clear:both">
<script src="/gg_bd_ad_720x90.js" type="text/javascript"></script>
<script src="/follow.js" type="text/javascript"></script>
</div>
</body></html>reset.css
html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed,
figure, figcaption, footer, header, hgroup,
menu, nav, output, ruby, section, summary,
time, mark, audio, video {margin: 0;padding: 0;border: 0;font-size: 100%;font: inherit;vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure,
footer, header, hgroup, menu, nav, section {display: block;
}
body {line-height: 1;
}
ol, ul {list-style: none;
}
blockquote, q {quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {content: '';content: none;
}
table {border-collapse: collapse;border-spacing: 0;
}style.css
body {background: #111;
}canvas {background: #111;border: 1px solid #171717;display: block;left: 50%;margin: -51px 0 0 -201px;position: absolute;top: 50%;
}index.js
/*========================================================*/
/* Light Loader
/*========================================================*/
var lightLoader = function(c, cw, ch){var _this = this;this.c = c;this.ctx = c.getContext('2d');this.cw = cw;this.ch = ch; this.loaded = 0;this.loaderSpeed = .6;this.loaderHeight = 10;this.loaderWidth = 310; this.loader = {x: (this.cw/2) - (this.loaderWidth/2),y: (this.ch/2) - (this.loaderHeight/2)};this.particles = [];this.particleLift = 180;this.hueStart = 0this.hueEnd = 120;this.hue = 0;this.gravity = .15;this.particleRate = 4; /*========================================================*/ /* Initialize/*========================================================*/this.init = function(){this.loop();};/*========================================================*/ /* Utility Functions/*========================================================*/ this.rand = function(rMi, rMa){return ~~((Math.random()*(rMa-rMi+1))+rMi);};this.hitTest = function(x1, y1, w1, h1, x2, y2, w2, h2){return !(x1 + w1 < x2 || x2 + w2 < x1 || y1 + h1 < y2 || y2 + h2 < y1);};/*========================================================*/ /* Update Loader/*========================================================*/this.updateLoader = function(){if(this.loaded < 100){this.loaded += this.loaderSpeed;} else {this.loaded = 0;}};/*========================================================*/ /* Render Loader/*========================================================*/this.renderLoader = function(){this.ctx.fillStyle = '#000';this.ctx.fillRect(this.loader.x, this.loader.y, this.loaderWidth, this.loaderHeight);this.hue = this.hueStart + (this.loaded/100)*(this.hueEnd - this.hueStart);var newWidth = (this.loaded/100)*this.loaderWidth;this.ctx.fillStyle = 'hsla('+this.hue+', 100%, 40%, 1)';this.ctx.fillRect(this.loader.x, this.loader.y, newWidth, this.loaderHeight);this.ctx.fillStyle = '#222';this.ctx.fillRect(this.loader.x, this.loader.y, newWidth, this.loaderHeight/2);}; /*========================================================*/ /* Particles/*========================================================*/this.Particle = function(){ this.x = _this.loader.x + ((_this.loaded/100)*_this.loaderWidth) - _this.rand(0, 1);this.y = _this.ch/2 + _this.rand(0,_this.loaderHeight)-_this.loaderHeight/2;this.vx = (_this.rand(0,4)-2)/100;this.vy = (_this.rand(0,_this.particleLift)-_this.particleLift*2)/100;this.width = _this.rand(1,4)/2;this.height = _this.rand(1,4)/2;this.hue = _this.hue;};this.Particle.prototype.update = function(i){this.vx += (_this.rand(0,6)-3)/100; this.vy += _this.gravity;this.x += this.vx;this.y += this.vy;if(this.y > _this.ch){_this.particles.splice(i, 1);} };this.Particle.prototype.render = function(){_this.ctx.fillStyle = 'hsla('+this.hue+', 100%, '+_this.rand(50,70)+'%, '+_this.rand(20,100)/100+')';_this.ctx.fillRect(this.x, this.y, this.width, this.height);};this.createParticles = function(){var i = this.particleRate;while(i--){this.particles.push(new this.Particle());};};this.updateParticles = function(){ var i = this.particles.length; while(i--){var p = this.particles[i];p.update(i); }; };this.renderParticles = function(){var i = this.particles.length; while(i--){var p = this.particles[i];p.render(); }; };/*========================================================*/ /* Clear Canvas/*========================================================*/this.clearCanvas = function(){this.ctx.globalCompositeOperation = 'source-over';this.ctx.clearRect(0,0,this.cw,this.ch); this.ctx.globalCompositeOperation = 'lighter';};/*========================================================*/ /* Animation Loop/*========================================================*/this.loop = function(){var loopIt = function(){requestAnimationFrame(loopIt, _this.c);_this.clearCanvas();_this.createParticles();_this.updateLoader();_this.updateParticles();_this.renderLoader();_this.renderParticles();};loopIt(); };};/*========================================================*/
/* Check Canvas Support
/*========================================================*/
var isCanvasSupported = function(){var elem = document.createElement('canvas');return !!(elem.getContext && elem.getContext('2d'));
};/*========================================================*/
/* Setup requestAnimationFrame
/*========================================================*/
var setupRAF = function(){var lastTime = 0;var vendors = ['ms', 'moz', 'webkit', 'o'];for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x){window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame'];window.cancelAnimationFrame = window[vendors[x]+'CancelAnimationFrame'] || window[vendors[x]+'CancelRequestAnimationFrame'];};if(!window.requestAnimationFrame){window.requestAnimationFrame = function(callback, element){var currTime = new Date().getTime();var timeToCall = Math.max(0, 16 - (currTime - lastTime));var id = window.setTimeout(function() { callback(currTime + timeToCall); }, timeToCall);lastTime = currTime + timeToCall;return id;};};if (!window.cancelAnimationFrame){window.cancelAnimationFrame = function(id){clearTimeout(id);};};
}; /*========================================================*/
/* Define Canvas and Initialize
/*========================================================*/
if(isCanvasSupported){var c = document.createElement('canvas');c.width = 400;c.height = 100; var cw = c.width;var ch = c.height; document.body.appendChild(c); var cl = new lightLoader(c, cw, ch); setupRAF();cl.init();
}
prefixfree.min.js
/*** StyleFix 1.0.3 & PrefixFree 1.0.7* @author Lea Verou* MIT license*/(function(){if(!window.addEventListener) {return;
}var self = window.StyleFix = {link: function(link) {try {// Ignore stylesheets with data-noprefix attribute as well as alternate stylesheetsif(link.rel !== 'stylesheet' || link.hasAttribute('data-noprefix')) {return;}}catch(e) {return;}var url = link.href || link.getAttribute('data-href'),base = url.replace(/[^\/]+$/, ''),base_scheme = (/^[a-z]{3,10}:/.exec(base) || [''])[0],base_domain = (/^[a-z]{3,10}:\/\/[^\/]+/.exec(base) || [''])[0],base_query = /^([^?]*)\??/.exec(url)[1],parent = link.parentNode,xhr = new XMLHttpRequest(),process;xhr.onreadystatechange = function() {if(xhr.readyState === 4) {process();}};process = function() {var css = xhr.responseText;if(css && link.parentNode && (!xhr.status || xhr.status < 400 || xhr.status > 600)) {css = self.fix(css, true, link);// Convert relative URLs to absolute, if neededif(base) {css = css.replace(/url\(\s*?((?:"|')?)(.+?)\1\s*?\)/gi, function($0, quote, url) {if(/^([a-z]{3,10}:|#)/i.test(url)) { // Absolute & or hash-relativereturn $0;}else if(/^\/\//.test(url)) { // Scheme-relative// May contain sequences like /../ and /./ but those DO workreturn 'url("' + base_scheme + url + '")';}else if(/^\//.test(url)) { // Domain-relativereturn 'url("' + base_domain + url + '")';}else if(/^\?/.test(url)) { // Query-relativereturn 'url("' + base_query + url + '")';}else {// Path-relativereturn 'url("' + base + url + '")';}});// behavior URLs shoudn鈥檛 be converted (Issue #19)// base should be escaped before added to RegExp (Issue #81)var escaped_base = base.replace(/([\\\^\$*+[\]?{}.=!:(|)])/g,"\\$1");css = css.replace(RegExp('\\b(behavior:\\s*?url\\(\'?"?)' + escaped_base, 'gi'), '$1');}var style = document.createElement('style');style.textContent = css;style.media = link.media;style.disabled = link.disabled;style.setAttribute('data-href', link.getAttribute('href'));parent.insertBefore(style, link);parent.removeChild(link);style.media = link.media; // Duplicate is intentional. See issue #31}};try {xhr.open('GET', url);xhr.send(null);} catch (e) {// Fallback to XDomainRequest if availableif (typeof XDomainRequest != "undefined") {xhr = new XDomainRequest();xhr.onerror = xhr.onprogress = function() {};xhr.onload = process;xhr.open("GET", url);xhr.send(null);}}link.setAttribute('data-inprogress', '');},styleElement: function(style) {if (style.hasAttribute('data-noprefix')) {return;}var disabled = style.disabled;style.textContent = self.fix(style.textContent, true, style);style.disabled = disabled;},styleAttribute: function(element) {var css = element.getAttribute('style');css = self.fix(css, false, element);element.setAttribute('style', css);},process: function() {// Linked stylesheets$('link[rel="stylesheet"]:not([data-inprogress])').forEach(StyleFix.link);// Inline stylesheets$('style').forEach(StyleFix.styleElement);// Inline styles$('[style]').forEach(StyleFix.styleAttribute);},register: function(fixer, index) {(self.fixers = self.fixers || []).splice(index === undefined? self.fixers.length : index, 0, fixer);},fix: function(css, raw, element) {for(var i=0; i<self.fixers.length; i++) {css = self.fixers[i](css, raw, element) || css;}return css;},camelCase: function(str) {return str.replace(/-([a-z])/g, function($0, $1) { return $1.toUpperCase(); }).replace('-','');},deCamelCase: function(str) {return str.replace(/[A-Z]/g, function($0) { return '-' + $0.toLowerCase() });}
};/*************************************** Process styles**************************************/
(function(){setTimeout(function(){$('link[rel="stylesheet"]').forEach(StyleFix.link);}, 10);document.addEventListener('DOMContentLoaded', StyleFix.process, false);
})();function $(expr, con) {return [].slice.call((con || document).querySelectorAll(expr));
}})();/*** PrefixFree*/
(function(root){if(!window.StyleFix || !window.getComputedStyle) {return;
}// Private helper
function fix(what, before, after, replacement, css) {what = self[what];if(what.length) {var regex = RegExp(before + '(' + what.join('|') + ')' + after, 'gi');css = css.replace(regex, replacement);}return css;
}var self = window.PrefixFree = {prefixCSS: function(css, raw, element) {var prefix = self.prefix;// Gradient angles hotfixif(self.functions.indexOf('linear-gradient') > -1) {// Gradients are supported with a prefix, convert angles to legacycss = css.replace(/(\s|:|,)(repeating-)?linear-gradient\(\s*(-?\d*\.?\d*)deg/ig, function ($0, delim, repeating, deg) {return delim + (repeating || '') + 'linear-gradient(' + (90-deg) + 'deg';});}css = fix('functions', '(\\s|:|,)', '\\s*\\(', '$1' + prefix + '$2(', css);css = fix('keywords', '(\\s|:)', '(\\s|;|\\}|$)', '$1' + prefix + '$2$3', css);css = fix('properties', '(^|\\{|\\s|;)', '\\s*:', '$1' + prefix + '$2:', css);// Prefix properties *inside* values (issue #8)if (self.properties.length) {var regex = RegExp('\\b(' + self.properties.join('|') + ')(?!:)', 'gi');css = fix('valueProperties', '\\b', ':(.+?);', function($0) {return $0.replace(regex, prefix + "$1")}, css);}if(raw) {css = fix('selectors', '', '\\b', self.prefixSelector, css);css = fix('atrules', '@', '\\b', '@' + prefix + '$1', css);}// Fix double prefixingcss = css.replace(RegExp('-' + prefix, 'g'), '-');// Prefix wildcardcss = css.replace(/-\*-(?=[a-z]+)/gi, self.prefix);return css;},property: function(property) {return (self.properties.indexOf(property)? self.prefix : '') + property;},value: function(value, property) {value = fix('functions', '(^|\\s|,)', '\\s*\\(', '$1' + self.prefix + '$2(', value);value = fix('keywords', '(^|\\s)', '(\\s|$)', '$1' + self.prefix + '$2$3', value);// TODO properties inside valuesreturn value;},// Warning: Prefixes no matter what, even if the selector is supported prefix-lessprefixSelector: function(selector) {return selector.replace(/^:{1,2}/, function($0) { return $0 + self.prefix })},// Warning: Prefixes no matter what, even if the property is supported prefix-lessprefixProperty: function(property, camelCase) {var prefixed = self.prefix + property;return camelCase? StyleFix.camelCase(prefixed) : prefixed;}
};/*************************************** Properties**************************************/
(function() {var prefixes = {},properties = [],shorthands = {},style = getComputedStyle(document.documentElement, null),dummy = document.createElement('div').style;// Why are we doing this instead of iterating over properties in a .style object? Cause Webkit won't iterate over those.var iterate = function(property) {if(property.charAt(0) === '-') {properties.push(property);var parts = property.split('-'),prefix = parts[1];// Count prefix usesprefixes[prefix] = ++prefixes[prefix] || 1;// This helps determining shorthandswhile(parts.length > 3) {parts.pop();var shorthand = parts.join('-');if(supported(shorthand) && properties.indexOf(shorthand) === -1) {properties.push(shorthand);}}}},supported = function(property) {return StyleFix.camelCase(property) in dummy;}// Some browsers have numerical indices for the properties, some don'tif(style.length > 0) {for(var i=0; i<style.length; i++) {iterate(style[i])}}else {for(var property in style) {iterate(StyleFix.deCamelCase(property));}}// Find most frequently used prefixvar highest = {uses:0};for(var prefix in prefixes) {var uses = prefixes[prefix];if(highest.uses < uses) {highest = {prefix: prefix, uses: uses};}}self.prefix = '-' + highest.prefix + '-';self.Prefix = StyleFix.camelCase(self.prefix);self.properties = [];// Get properties ONLY supported with a prefixfor(var i=0; i<properties.length; i++) {var property = properties[i];if(property.indexOf(self.prefix) === 0) { // we might have multiple prefixes, like Operavar unprefixed = property.slice(self.prefix.length);if(!supported(unprefixed)) {self.properties.push(unprefixed);}}}// IE fixif(self.Prefix == 'Ms'&& !('transform' in dummy)&& !('MsTransform' in dummy)&& ('msTransform' in dummy)) {self.properties.push('transform', 'transform-origin');}self.properties.sort();
})();/*************************************** Values**************************************/
(function() {
// Values that might need prefixing
var functions = {'linear-gradient': {property: 'backgroundImage',params: 'red, teal'},'calc': {property: 'width',params: '1px + 5%'},'element': {property: 'backgroundImage',params: '#foo'},'cross-fade': {property: 'backgroundImage',params: 'url(a.png), url(b.png), 50%'}
};functions['repeating-linear-gradient'] =
functions['repeating-radial-gradient'] =
functions['radial-gradient'] =
functions['linear-gradient'];// Note: The properties assigned are just to *test* support.
// The keywords will be prefixed everywhere.
var keywords = {'initial': 'color','zoom-in': 'cursor','zoom-out': 'cursor','box': 'display','flexbox': 'display','inline-flexbox': 'display','flex': 'display','inline-flex': 'display','grid': 'display','inline-grid': 'display','min-content': 'width'
};self.functions = [];
self.keywords = [];var style = document.createElement('div').style;function supported(value, property) {style[property] = '';style[property] = value;return !!style[property];
}for (var func in functions) {var test = functions[func],property = test.property,value = func + '(' + test.params + ')';if (!supported(value, property)&& supported(self.prefix + value, property)) {// It's supported, but with a prefixself.functions.push(func);}
}for (var keyword in keywords) {var property = keywords[keyword];if (!supported(keyword, property)&& supported(self.prefix + keyword, property)) {// It's supported, but with a prefixself.keywords.push(keyword);}
}})();/*************************************** Selectors and @-rules**************************************/
(function() {var
selectors = {':read-only': null,':read-write': null,':any-link': null,'::selection': null
},atrules = {'keyframes': 'name','viewport': null,'document': 'regexp(".")'
};self.selectors = [];
self.atrules = [];var style = root.appendChild(document.createElement('style'));function supported(selector) {style.textContent = selector + '{}'; // Safari 4 has issues with style.innerHTMLreturn !!style.sheet.cssRules.length;
}for(var selector in selectors) {var test = selector + (selectors[selector]? '(' + selectors[selector] + ')' : '');if(!supported(test) && supported(self.prefixSelector(test))) {self.selectors.push(selector);}
}for(var atrule in atrules) {var test = atrule + ' ' + (atrules[atrule] || '');if(!supported('@' + test) && supported('@' + self.prefix + test)) {self.atrules.push(atrule);}
}root.removeChild(style);})();// Properties that accept properties as their value
self.valueProperties = ['transition','transition-property'
]// Add class for current prefix
root.className += ' ' + self.prefix;StyleFix.register(self.prefixCSS);})(document.documentElement);下面是运行效果：
相关文章：
HTML 炫酷进度条
下面是代码 <!DOCTYPE html> <html><head><meta charset"UTF-8"><title>Light Loader - CodePen</title><style> html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr…...
Windows10上使Git Bash支持rsync命令操作步骤
rsync命令是linux上常用的工具之一，用于远程以及本地系统中拷贝/同步文件和文件夹。 Windows Git Bash默认并不支持rsync，如下图所示： 使Git Bash支持rsync命令操作步骤： 1.从https://repo.msys2.org/msys/x86_64/ 下…...
rust for循环里的所有权 - into_iter / iter / iter_mut
文章目录 1 遍历对象实质为 .into_iter() 生成的迭代器2 避免转移 .iter() / .iter_mut()3 for循环里自变量为什么不用加mut // for循环语法糖 for loop_variable in iterator {code() } // 解糖 {let result match IntoIterator::into_iter(iterator) {mut iter > loop {m…...
GitHub README-Template.md - README.md 模板
GitHub README-Template.md - README.md 模板 1. README-Template.md 预览模式2. README-Template.md 编辑模式References A template to make good README.md. https://gist.github.com/PurpleBooth/109311bb0361f32d87a2 1. README-Template.md 预览模式 2. README-Templat…...
【文本到上下文 #6】Word2Vec、GloVe 和 FastText
一、说明 欢迎来到“文本到上下文”博客的第 6 个系列。到目前为止，我们已经探索了自然语言处理的基础知识、应用和挑战。我们深入研究了标记化、文本清理、停用词、词干提取、词形还原、词性标记和命名实体识别。我们的探索包括文本表示技术，如词袋、TF…...
yolov5 opencv dnn部署自己的模型
yolov5 opencv dnn部署自己的模型 github开源代码地址使用github源码结合自己导出的onnx模型推理自己的视频推理条件c部署c 推理结果 github开源代码地址 yolov5官网还提供的dnn、tensorrt推理链接本人使用的opencv c github代码,代码作者非本人，也是上面作者推荐的…...
Cortex-M4处理器 电源管理
Cortex-M4处理器的休眠模式可以降低功耗。 模式可以是以下一种或两种： 休眠模式停止处理器时钟深度睡眠模式停止系统时钟，关闭锁相环和闪存。 如果设备实现了两种提供不同级别省电的睡眠模式，那么SCR的SLEEPDEEP位将选择使用哪种睡眠模式。…...
Linux 驱动开发基础知识——编写LED驱动程序（三）
个人名片： 🦁作者简介：一名喜欢分享和记录学习的在校大学生 🐯个人主页：妄北y 🐧个人QQ：2061314755 🐻个人邮箱：2061314755qq.com 🦉个人WeChat：V…...
YOLOv8 视频识别
YOLOv8 是一种目标检测算法，用于识别视频中的物体。要控制视频识别中的帧，可以通过以下方式来实现： 设置帧率：可以通过设置视频的帧率来控制视频的播放速度，从而影响视频识别的速度。 跳帧处理：可以通过跳…...
elementplus Dialog 对话框设置距离页面顶部的距离
默认为 15vh，当弹窗过于高的时候，这个距离其实是不合适的 <el-dialogv-model"dialogVisible"title"Tips"width"30%":before-close"handleClose"top"6vh"><span>This is a message</s…...
便捷接口调测：API 开发工具大比拼 | 开源专题 No.62
hoppscotch/hoppscotch Stars: 56.1k License: MIT Hoppscotch 是一个开源的 API 开发生态系统，主要功能包括发送请求和获取实时响应。该项目具有以下核心优势： 轻量级：采用简约的 UI 设计。快速：实时发送请求并获得响应。支持多…...
openssl3.2/test/certs - 008 - root-nonca trust variants: +serverAuth +anyEKU
文章目录 openssl3.2/test/certs - 008 - root-nonca trust variants: serverAuth anyEKU概述笔记END openssl3.2/test/certs - 008 - root-nonca trust variants: serverAuth anyEKU 概述 openssl3.2 - 官方demo学习 - test - certs 笔记 // \file my_openssl_win_log_doc…...
cg插画设计行业怎么样，如何学习插画设计
插画设计行业是一个充满创意和艺术性的行业，随着数字化时代的不断发展，cg插画的应用范围越来越广泛，市场需求也在逐年增长。以下是一些关于acg插画设计行业的现状和发展趋势： 市场需求不断增长：随着广告、媒体、影视、…...
1.25学习总结
今天学习了二叉树，了解了二叉树的创建和遍历的过程 今天所了解的遍历过程主要分为三种，前序中序和后序，都是DFS的想法 前序遍历：先输出在遍历左节点和右节点（输出->左->右） 中序遍历：先…...
C语言每日一题（48）回文链表
力扣 234 回文链表 题目描述 给你一个单链表的头节点 head ，请你判断该链表是否为回文链表。如果是，返回 true ；否则，返回 false 。 示例 1： 输入：head [1,2,2,1] 输出：true示例 2࿱…...
提高代码效率的5个Python内存优化技巧
大家好，当项目变得越来越大时，有效地管理计算资源是一个不可避免的需求。Python与C或c等低级语言相比，似乎不够节省内存。 但是其实有许多方法可以显著优化Python程序的内存使用，这些方法可能在实际应用中并没有人注意࿰…...
基于一款热门大屏可视化设计器使用教程
乐吾乐大屏可视化设计器是一个用于创建和定制大屏幕数据可视化展示的工具，支持零代码实现物联网、工业智能制造等领域的可视化大屏、触摸屏端UI以及工控可视化的解决方案。同时也是一个Web组态工具，支持2D、3D等多种形式，用于构建具有实时数据…...
梯度下降法、模拟训练、拟合二次曲线、最小二乘法、MSELoss、拟合:f(x)=ax^2+bx+c
本文目标： 以这个公式为例，设计一个算法，用梯度下降法来模拟训练过程，最终得出参数a,b,c 原理介绍 目标函数： 损失函数：，就是mse 损失函数展开： 损失函数对a,b,c求导数: 导数就是梯度…...
Web3.0投票如何做到公平公正且不泄露个人隐私
在当前的数字时代，社交平台举办投票活动已成为了一种普遍现象。然而，随之而来的是一些隐私和安全方面的顾虑，特别是关于个人信息泄露和电话骚扰的问题。期望建立一个既公平公正又能保护个人隐私的投票系统。Web3.0的出现为实现这一目标提供了…...
灰度图像的自动阈值分割
第一种：Otsu （大津法） 一、基于cv2的API调用 1、代码实现 直接给出相关代码： import cv2 import matplotlib.pylab as pltpath r"D:\Desktop\00aa\1.png" img cv2.imread(path, 0)def main2():ret, thresh1 cv2.…...
【网络安全产品大调研系列】2. 体验漏洞扫描
前言 2023 年漏洞扫描服务市场规模预计为 3.06（十亿美元）。漏洞扫描服务市场行业预计将从 2024 年的 3.48（十亿美元）增长到 2032 年的 9.54（十亿美元）。预测期内漏洞扫描服务市场 CAGR（增长率&…...
解锁数据库简洁之道：FastAPI与SQLModel实战指南
在构建现代Web应用程序时，与数据库的交互无疑是核心环节。虽然传统的数据库操作方式（如直接编写SQL语句与psycopg2交互）赋予了我们精细的控制权，但在面对日益复杂的业务逻辑和快速迭代的需求时，这种方式的开发效率和可…...
dedecms 织梦自定义表单留言增加ajax验证码功能
增加ajax功能模块，用户不点击提交按钮，只要输入框失去焦点，就会提前提示验证码是否正确。 一，模板上增加验证码 <input name"vdcode"id"vdcode" placeholder"请输入验证码" type"text&quo…...
vue3 定时器-定义全局方法 vue+ts
1.创建ts文件 路径：src/utils/timer.ts 完整代码： import { onUnmounted } from vuetype TimerCallback (...args: any[]) > voidexport function useGlobalTimer() {const timers: Map<number, NodeJS.Timeout> new Map()// 创建定时器con…...
工业自动化时代的精准装配革新：迁移科技3D视觉系统如何重塑机器人定位装配
AI3D视觉的工业赋能者 迁移科技成立于2017年，作为行业领先的3D工业相机及视觉系统供应商，累计完成数亿元融资。其核心技术覆盖硬件设计、算法优化及软件集成，通过稳定、易用、高回报的AI3D视觉系统，为汽车、新能源、金属制造等行…...
根据万维钢·精英日课6的内容，使用AI（2025）可以参考以下方法：
根据万维钢精英日课6的内容，使用AI（2025）可以参考以下方法： 四个洞见 模型已经比人聪明：以ChatGPT o3为代表的AI非常强大，能运用高级理论解释道理、引用最新学术论文，生成对顶尖科学家都有用的…...
OPenCV CUDA模块图像处理-----对图像执行 均值漂移滤波（Mean Shift Filtering）函数meanShiftFiltering()
操作系统：ubuntu22.04 OpenCV版本：OpenCV4.9 IDE:Visual Studio Code 编程语言：C11 算法描述 在 GPU 上对图像执行 均值漂移滤波（Mean Shift Filtering），用于图像分割或平滑处理。 该函数将输入图像中的…...
dify打造数据可视化图表
一、概述 在日常工作和学习中，我们经常需要和数据打交道。无论是分析报告、项目展示，还是简单的数据洞察，一个清晰直观的图表，往往能胜过千言万语。 一款能让数据可视化变得超级简单的 MCP Server，由蚂蚁集团 AntV 团队…...
Linux --进程控制
本文从以下五个方面来初步认识进程控制： 目录 进程创建 进程终止 进程等待 进程替换 模拟实现一个微型shell 进程创建 在Linux系统中我们可以在一个进程使用系统调用fork()来创建子进程，创建出来的进程就是子进程，原来的进程为父进程。…...
微软PowerBI考试 PL300-在 Power BI 中清理、转换和加载数据
微软PowerBI考试 PL300-在 Power BI 中清理、转换和加载数据 Power Query 具有大量专门帮助您清理和准备数据以供分析的功能。 您将了解如何简化复杂模型、更改数据类型、重命名对象和透视数据。 您还将了解如何分析列，以便知晓哪些列包含有价值的数据，…...