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The world modelling newswire

What is happening worldwide in digital twins, mathematical modelling and the management of large-scale systems: research, press releases, product news. From the US, China, ASEAN and Africa — translated and summarised.

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300 items · 125 more in the archive

Modelling

От языка к действию: как устроены агентные ИИ‑системы

LLM умеет рассуждать и генерировать ответы, но что делать, если системе нужно самостоятельно выполнять задачи, взаимодействовать с внешними сервисами и проверять результаты своих действий? Здесь начинается территория ИИ‑агентов, где появляются новые архитектурные решения и сложности.

ModellingUS & West

Bayesian inference for agent-based models with 90% fewer simulations

The DF-NPE method combines learned time-series summaries with two conditional normalizing flows for synthetic-data generation and posterior estimation. It supplements direct simulations with synthetic training pairs and supports pooled and ordered training strategies. In two settings of the Brock-Hommes asset-pricing model it cuts direct simulations by 90% while achieving lower posterior discrepancy and runtime.

ModellingUS & West

Adapting neural posterior estimators for agent-based model inference

Agent-based models in economics and social sciences represent heterogeneous behavior and interactions through simulations, while their likelihood is often intractable for parameter estimation. The work examines likelihood-free neural inference, notably neural posterior estimation with normalizing flows providing amortized Bayesian inference. It notes that a pre-trained estimator may become inaccurate when the target task changes and discusses adapting such estimators.