慣性聚合 高效追讀感興趣之博客、新聞、科技資訊
閱原文 以慣性聚合開啟

推薦訂閱源

博客园 - 司徒正美
V
V2EX
T
Tailwind CSS Blog
有赞技术团队
有赞技术团队
aimingoo的专栏
aimingoo的专栏
Apple Machine Learning Research
Apple Machine Learning Research
IT之家
IT之家
Blog — PlanetScale
Blog — PlanetScale
A
About on SuperTechFans
月光博客
月光博客
T
The Blog of Author Tim Ferriss
宝玉的分享
宝玉的分享
Martin Fowler
Martin Fowler
博客园 - 聂微东
The GitHub Blog
The GitHub Blog
V
Visual Studio Blog
WordPress大学
WordPress大学
酷 壳 – CoolShell
酷 壳 – CoolShell
Engineering at Meta
Engineering at Meta
GbyAI
GbyAI

DEV Community

Authentication Security Deep Dive: From Brute Force to Salted Hashing (With Java Examples) Why AI Systems Don’t Fail — They Drift Spilling beans for how i learn for exam😁"Reinforcement Learning Cheat Sheet" I Replaced Chrome with Safari for AI Browser Automation. Here's What Broke (and What Finally Worked) How Python Borrows Other People's Work The $40 Architecture: Processing 1 Billion API Requests with 99.99% Uptime Vibe Coding: A Workflow Guide (From Zero to SaaS) Most webhook security guides protect the wrong side. The scary part is delivery. Headless CMS for TanStack Start: Build a Blog with Cosmic EU Age Verification App "Hacked in 2 Minutes" — What Actually Happened Comfy Cloud’s delete function does not actually remove files Running AI Models on GPU Cloud Servers: A Beginner Guide Event-driven media intelligence with AWS Step Functions and Bedrock I scored 500 AI prompts across 8 quality dimensions — here's what broke How to Call Google Gemini API from Next.js (Free Tier, No Backend Needed) The Portal Protocol: Reclaiming Human Connection in the Age of AI How to Fix Your Team's Scattered Knowledge Problem With a Self-Hosted Forum Intro to tc Cloud Functors: A Graph-First Mental Model for the Modern Cloud Designing Multi-Tenant Backends With Both Ownership and Team Access I Built a Neumorphic CSS Library with 77+ Components — Here's What I Learned PostgreSQL Performance Optimization: Why Connection Pooling Is Critical at Scale Cómo construí un SaaS multi-rubro para gestionar expensas en Argentina con FastAPI + Vue 3 🚀 I Built an Ethical Hacking Scanner Tool – Open Source Project I Replaced /usage and /context in Claude Code With a Single Statusline A Pythonic Way to Handle Emails (IMAP/SMTP) with Auto-Discovery and AI-Ready Design I Collected 8.9 Million Polymarket Price Points — Here's What I Found About How Markets Really Move EcoTrack AI — Carbon Footprint Tracker & Dashboard Everyone's Using AI. No One Agrees How. 5 self-hosted ebook managers worth trying in 2026 Building Your First AI Agent with LangChain: From Chatbot to Autonomous Assistant Common SOC 2 Failures (Real World) Stop Vibe-Checking Your AI App: A Practical Guide to Evals How to Use SonarQube and SonarScanner Locally to Level Up Your Code Quality Your Next To-Do App Is Dead — I Replaced Mine with an OpenClaw AI Sign a Nostr event in 60 lines of Python using coincurve — no nostr-sdk, no nbxplorer, no rust toolchain ITGC Audit Explained Like You’re in Big 4 Patch Tuesday abril 2026: Microsoft parcha 163 vulnerabilidades y un zero-day en SharePoint Stop scraping everything: a better way to track competitor price changes Listing on MCPize + the Official MCP Registry while routing payments OUTSIDE the marketplace — how I kept 100% of my x402 revenue Building an AI-Powered Risk Intelligence System Using Serverless Architecture Why We Ripped Function Overloading Out of Our AI Toolchain Testing AI-Generated Code: How to Actually Know If It Works SaaS Churn Is Killing Your Business. Here Is What to Do About It (Without a Support Team) The Speed of AI Is No Longer Linear - And Self-Improving Models Are Why How to Implement RBAC for MCP Tools: A Practical Guide for Engineering Teams From Standard Quote to Persuasive Proposal: AI Automation for Arborists I built a CLI that scaffolds complete multi-tenant SaaS apps Axios CVE-2025–62718: The Silent SSRF Bug That Could Be Hiding in Your Node.js App Right Now The dashboard that ended our friendship Data Pipelines Explained Simply (and How to Build Them with Python)
吾造一免金属重量计算器——此乃其数理之玄机
Param Mehta · 2026-05-24 · via DEV Community

Param Mehta

吾非专业之开发者也。吾乃钢铁之匠,厌于纸笔计算管重之劳.
是故,吾建MetalWeightPro——为印度之匠所设之免费、基于浏览器之金属重量计算器。无框架,无后端。唯用纯白之HTML、CSS及ES模块而已.
此乃驱动之算术.


核心之公式
每段式之形各异,其横截面积亦不同。重恒为:

W = A × L × ρ

入全景模式 出全屏模式

何之?
W = 体重(千克)
A = 横截面积(平方米)
L = 长度(米)
ρ = 物質密度(kg/m³)

每节之异,惟计算 A 法耳。

圆棒

```// D 寸,返斤/尺
function 圆棒重(D, 密度 = 7850) {
const 面 = (Math.PI / 4) * Math.pow(D / 1000, 2);
return 面 * 密度;
}

// 简常之式
圆棒重量简易算法(D) {
返(D * D) / 162;
}

// 例:25毫米MS圆棒
console.log(roundBarWeightSimple(25)); // 3.858千克/米```


空心管

// OD and t in mm, returns kg/m
function pipeWeight(OD, t, density = 7850) {
  const outerArea = (Math.PI / 4) * Math.pow(OD / 1000, 2);
  const innerArea = (Math.PI / 4) * Math.pow((OD - 2 * t) / 1000, 2);
  return (outerArea - innerArea) * density;
}

// Simplified form
function pipeWeightSimple(OD, t) {
  return (OD - t) * t * 0.0246615;
}

// Example: 60.3mm OD, 3.65mm wall (2" IS 1239 medium)
console.log(pipeWeightSimple(60.3, 3.65)); // 5.10 kg/m

全屏模式 退出全屏模式


纯文本


空心截面(SHS/RHS)

// All dimensions in mm, returns kg/m
function hollowSectionWeight(B, H, t, density = 7850) {
  const outerArea = (B / 1000) * (H / 1000);
  const innerArea = ((B - 2 * t) / 1000) * ((H - 2 * t) / 1000);
  return (outerArea - innerArea) * density;
}

// Example: 50×50×3mm SHS (IS 4923)
console.log(hollowSectionWeight(50, 50, 3)); // 4.45 kg/m

入全景模式 出全景模式


原文


MS 角度

// A, B = leg lengths in mm, t = thickness in mm
function angleWeight(A, B, t, density = 7850) {
  const area = ((A + B - t) * t) / 1000000;
  return area * density;
}

// Example: 65×65×6mm equal angle (IS 808)
console.log(angleWeight(65, 65, 6)); // 5.84 kg/m

入全景模式 出全景模式


原文


物料密度

const DENSITIES = {
  mild_steel:      7850,
  stainless_steel: 8000,
  aluminium:       2700,
  copper:          8960,
  brass:           8500,
  cast_iron:       7200,
  gi:              7850,
  lead:            11340
};

入全景模式 出全景模式


原文


除数之式

// Divisor = 1,000,000 ÷ (π/4 × density)
function getDivisor(density) {
  return 1000000 / ((Math.PI / 4) * density);
}

console.log(getDivisor(7850));  // 162.3 → MS
console.log(getDivisor(8000));  // 159.2 → SS
console.log(getDivisor(2700));  // 471.5 → Aluminium
console.log(getDivisor(8960));  // 142.5 → Copper

入全景模式 出全景模式

此故也,匠者云MS用D²/162,然法式普适,惟易其除数以应物耳。