{"type":"post","id":"approach-is-training-free-the-forward-model-stays-81caa3","slug":"approach-is-training-free-the-forward-model-stays-81caa3","title":"Approach is training-free: the forward model stays physics-based, autograd only handles gradients.","description":"A 2026 revision of a research paper reports a way to estimate parameters in a land-surface model by differentiating its physics-based equations, without training a neural model.","retrieval_nugget":"A 2026 revision of a research paper reports a way to estimate parameters in a land-surface model by differentiating its physics-based equations, without training a neural model. For teams building scientific software, it shows automatic differentiation as an optimization tool while the forward simulation remains governed by domain equations—and shows why measurement design still determines what can be inferred.","published_at":"2026-11-14","updated_at":"2026-11-14","record_date":"2026-11-14","date_kind":"published_at","topics":["ai"],"entities":["Ruiyue Huang","Claire E. Heaney","Maarten van Reeuwijk","Neural Physics"],"related_patterns":[],"novelty_label":"new_fact","what_changed":"A differentiable, physics-based approach estimates land-surface model parameters without training, using gradients from observations at two soil depths and urban flux-tower data.","prior_refs":[],"source_url":"https://arxiv.org/abs/2505.02979","source_urls":["https://arxiv.org/abs/2505.02979"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:approach-is-training-free-the-forward-model-stays-81caa3","status":"published","visuals":[],"editor":{"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"routes":{"html":"https://newruntime.com/posts/approach-is-training-free-the-forward-model-stays-81caa3/","markdown":"https://newruntime.com/posts/approach-is-training-free-the-forward-model-stays-81caa3.md","json":"https://newruntime.com/posts/approach-is-training-free-the-forward-model-stays-81caa3.json"},"markdown_url":"https://newruntime.com/posts/approach-is-training-free-the-forward-model-stays-81caa3.md","next_reads":[{"type":"topic","path":"/topics/ai/","url":"https://newruntime.com/topics/ai/","title":"Ai","reason":"Explore the ai topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/ai.md","json_url":"https://newruntime.com/topics/ai.json"},{"type":"collection","path":"/posts/","url":"https://newruntime.com/posts/","title":"Field Notes","reason":"Open the latest editorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/posts.json"},{"type":"collection","path":"/sources/","url":"https://newruntime.com/sources/","title":"Sources","reason":"See the original sources this archive cites.","media_type":"text/html"}]}