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RoomCraft AI: optimizar la distribución de una habitación con Simulated Annealing

Colocar los muebles de una habitación es un problema de optimización con muchas restricciones: la cama no va delante de la puerta, el escritorio quiere luz natural, hay que poder circular. Hay un número enorme de disposiciones posibles. RoomCraft AI las explora automáticamente a partir de una descripción en lenguaje natural. El pipeline de tres etapas Parser con LLM: el usuario describe su habitación en texto libre ("un dormitorio de 4x3 con la puerta al norte y una ventana al este"). Un LLM ( Llama 3.1 vía Groq ) lo convierte en una estructura de datos validada con Pydantic : dimensiones, aberturas, muebles deseados. Latencia: <1s. Optimizador con Simulated Annealing: aquí está el corazón del proyecto. Visualización y export: los layouts se renderizan en 3D en el navegador con Three.js y se exportan como plano técnico en PDF con ReportLab . Por qué Simulated Annealing El espacio de disposiciones posibles es combinatorio y lleno de óptimos locales. Una búsqueda voraz se queda atascada en la primera solución "decente". El Simulated Annealing imita el enfriamiento de un metal: al principio acepta movimientos malos con cierta probabilidad (alta "temperatura"), lo que le permite escapar de óptimos locales; según baja la temperatura, se vuelve cada vez más exigente y converge. Es una metaheurística ideal cuando el espacio de soluciones es irregular y no tienes gradiente. La función objetivo puntúa cada disposición de 0 a 100 según ergonomía: espacio de circulación, relaciones entre muebles, acceso a luz y aberturas. El sistema devuelve el top 5 de layouts, no solo el mejor, para dar opciones. Rendimiento Parse: <1s . Optimización: 2–5s . Export PDF: <1s . Footprint en reposo: ~100 MB de RAM. Qué aprendí Que combinar un LLM (para entender lenguaje) con una metaheurística clásica (para optimizar de verdad) es un patrón potentísimo: el LLM traduce el problema humano a uno formal, y un algoritmo determinista y barato lo resuelve mejor —y de forma más explicable— que pedirle

2026-07-16 原文 →
AI 资讯

How Vector Search Actually Works: IVF and HNSW

Every system that does "semantic" anything — RAG pipelines, recommendation engines, image search, dedup — boils down to one operation: given this vector, find the closest ones out of millions. The vectors are embeddings, a few hundred to a couple thousand numbers each, and "closest" means closest in meaning. You'd assume the database either scans all of them (slow but correct) or uses some clever tree to jump straight to the answer. It does neither. Instead it deliberately settles for the approximately closest vectors — and that compromise is the entire reason vector search is fast enough to exist. Two algorithms do almost all the heavy lifting in practice, in pgvector, Qdrant, FAISS, and the rest: IVF and HNSW . Here's what they're actually doing under the hood, and how to choose between them. Why "exact" is off the table The natural objection is: why approximate? Just find the real nearest neighbor. In two or three dimensions you could — a k-d tree or similar structure prunes away big regions of space and finds the true closest point quickly. The trouble is that embeddings live in hundreds of dimensions, and high-dimensional space is deeply weird. It's called the curse of dimensionality . As dimensions grow, the distance to your nearest point and the distance to your farthest point drift toward being almost the same. Formally, the contrast (d_max − d_min) / d_min shrinks toward zero. When everything is roughly equidistant from everything else, a tree can't confidently say "skip this whole branch, it's too far" — the bounding regions all overlap, every branch looks plausible, and the search degrades into checking nearly everything. Exact indexes quietly collapse back into brute force. So we change the question. Instead of "prove you found the nearest," we ask "quickly find something very probably among the nearest." That's approximate nearest neighbor (ANN) search, and it swaps a guarantee for speed. The quality knob becomes recall : of the true top-k neighbors, wh

2026-07-10 原文 →
AI 资讯

Introducing PaperQuire — Markdown to Beautiful PDFs, 100% Offline

We're excited to launch PaperQuire — a desktop app that turns plain Markdown into professional, print-ready PDFs. No cloud uploads, no accounts, no subscriptions required for personal use. Why We Built PaperQuire If you write in Markdown, you've probably hit this wall: your content looks great in your editor, but the moment you need to share it as a polished document — a proposal, a report, a spec — you're stuck copy-pasting into Word or fighting with LaTeX. We wanted something simpler. Write in Markdown, click Export, and get a document that looks like a designer made it. No extra steps, no cloud dependency, no learning curve. What PaperQuire Does Live preview — See your formatted document side-by-side as you type. What you see is what you'll get in the PDF. Professional templates — Choose from templates designed for technical docs, proposals, reports, and more. Every template supports custom branding: your logo, your colors, your fonts. Offline-first — Your documents never leave your machine. PaperQuire runs entirely on your desktop — macOS, Windows, and Linux. Plugin system — Extend PaperQuire with plugins for diagrams (Mermaid), math (KaTeX), syntax highlighting, and more. AI Assist — Bring your own API key and get writing suggestions, grammar fixes, and content generation right inside the editor. How It Works Open PaperQuire and start writing Markdown — or open an existing .md file Choose a template and customize your branding (logo, colors, fonts) Click Export to generate a polished PDF instantly Share your document with confidence The entire process takes seconds, not minutes. Free for Personal Use PaperQuire is free for personal use with no restrictions on the core features. The Pro plan adds advanced exports (DOCX, HTML), batch processing, and priority support for teams that need more. Get Started Download PaperQuire for your platform: macOS (Apple Silicon) Windows (x64) Linux (x86_64) Check out the documentation for a quick walkthrough, or just start writi

2026-07-01 原文 →