Fishery Simulation
A fishery simulation of stocks, flows, and feedback loops managing fish populations.
Teach Yourself Systems Examples
Latest simulation examples from Teach Yourself Systems
Latest posts
Antifragile System
The same adaptive loop, two fates: with one knob negative each failure makes the system stronger; flip its sign and failures spiral to certain breakdown.
First-Price vs. Vickrey Auctions
Repeated sealed-bid auctions comparing first-price and Vickrey rules with learning agents.
Bank Renege Simulation
At a teller running near capacity, patience decides everything: impatient customers give up before a line even forms - half walk out - while patient ones build a long queue yet nearly all get served.
Bathtub Fill and Drain
A bathtub simulation illustrating stock and flow of water volume.
Car Service Simulation - SimPy Tutorial
A car service simulation showing priority washing with features like interrupts.
Dynamic Difficulty Adjustment
Adaptive encounters that track win rate to keep players challenged.
Elementary Cellular Automata
One 8-bit rule number, three worlds: flip it to walk a single-line automaton from an ordered fractal through Turing-complete complexity to deterministic chaos.
Gacha Box
Same 50 pulls, same spend, one setting apart: a pity timer guarantees the 1%-odds ultra after a dry streak, while turning it off can leave you empty-handed.
Game of Life
Conway's Game of Life: a random soup self-organizes into still-lifes, blinkers, and gliders — global order from one local rule.
Goal-Seeking Decay
A goal-seeking decay simulation modeling exponential approach toward a target.
Hospital ER Patient Flow
Queuing theory demo of patient flow through an emergency department.
Inspection Game
A ranger who patrols just 40% of sites can still stop poaching - but only if the penalty is harsh enough. Soften it and the same patrols let crime pay.
Inventory Oscillation
Naive reordering that ignores in-transit stock makes inventory swing; counting the pipeline flattens it.
Logistic Growth
Grow a population too fast and it overshoots its carrying capacity before settling; grow it gently and it glides up to the same limit.
Logistic Map
A logistic map simulation that iterates x_{n+1}=r*x_n*(1-x_n) to illustrate chaos.
Predator-Prey (Lotka–Volterra, SciPy)
A predator-prey simulation using the Lotka-Volterra equations.
Predator-Prey (Lotka–Volterra, SimPy)
Discrete-time SimPy approximation of the predator–prey model.
Machines Simulation
A machines simulation depicting resource allocation and reliability.
Matchmaking Queue
Simulates skill-based matchmaking with adjustable buckets, skill delta and max wait.
Nested Hierarchy Workflow
A nested hierarchy simulation where tasks flow across company departments.
Queue Simulation
A single-server queue at the edge of overload: nudge utilization past 1 and the backlog diverges.
Ride-Share Surge Control
Dynamic pricing stabilises rider waits—until high gain and delay turn it into surge whiplash.
Rumor vs Counterwave
Competing rumor and fact-check messages racing across a social network.
Savings vs Credit-Card Debt
Same card, same income - one number decides everything: pay just under the interest and the debt runs away; pay just over it and the balance marches to zero.
SIR Model with Vaccination
An SIR epidemic at the threshold: vaccinating past the herd-immunity line pushes effective R0 below 1 and the outbreak fizzles.
Sleep Debt Simulation
A sleep debt simulation tracking caffeine, sleep patterns, and debt buildup.
Thermostat Simulation
A bang-bang thermostat reading a delayed sensor overshoots and rings; shorten the delay and it settles.
War of Attrition
Two-player waiting game exploring mixed strategies and the option value of waiting.
Water Heater PID Control
PID control keeps a domestic hot water tank near its setpoint while balancing heater power and losses.