What is the fine-grained topic of the following text: A four-layered network using Levenberg-Marquardt (LM) learning algorithm is proposed to forecast annual peak load of Java-Madura-Bali interconnection, Indonesia, for the period of 2009-2018 considering 11 regional factors encompass economic, electricity statistics, and weather thought to affect the load demand. Only return the topic.
Forecasting annual peak load of Java-Madura-Bali interconnection using Levenberg-Marquardt learning algorithm