Newer list: - https://en.wikipedia.org/wiki/Radioactive_decay#One-decay_process - https://en.wikipedia.org/wiki/Hodgkin%E2%80%93Huxley_model - logistic function - Black–Scholes - https://en.wikipedia.org/wiki/Sethi_model - von Bertalanffy growth equation ### Models Simple, equation based: - classic predator-prey (Lotka–Volterra) - attractors - that vegan paper - whatever Fe is the minimal of (function of protons/neutrons? discrete) - urban subsidized housing (thinking in systems) - Pulse Tube Cooler - Hodgkin–Huxley model for neurons x Uranium Critical Mass (meh, too complicated) - black body (thermal emission) - compton scattering - Schwarzschild Radius - three-body, eg http://nbviewer.jupyter.org/github/pjpmarques/Julia-Modeling-the-World/blob/master/Three-Body%20Problem.ipynb Not-Time-Oriented - high-precision model for water (enthalpy, etc) Economics: - rent control - supply/demand curve - World3 - https://en.wikipedia.org/wiki/Category:Economics_models Harder, Time/State Based: - Schmitt trigger (hysteresis) Environment/Energy: - pretty much everything from Sustainable w/o Hot Air ### Non-Model (?) Equations - logistic function - statistical distributions - volume or surface area of platonic solids http://equator.memeschemes.com/equation/ https://en.wikipedia.org/wiki/Category:Equations ### Constants https://www.wikidata.org/wiki/Q173227 (physical constant) ### Units https://www.wikidata.org/wiki/Q15088658 (measured value) ### Existing / Import - World3 (from limits to growth report) - Tennessee Eastman Process Control Challenge Problem http://yoric.mit.edu/DAEPACK/Examples/Eastman - OpenWorm (in NeuroML)