Search Results for author: Zimeng Lyu

Found 8 papers, 0 papers with code

Minimally Supervised Topological Projections of Self-Organizing Maps for Phase of Flight Identification

no code implementations17 Feb 2024 Zimeng Lyu, Pujan Thapa, Travis Desell

General aviation flight data for phase of flight identification is usually per-second data, comes on a large scale, and is class imbalanced.

Minimally Supervised Learning using Topological Projections in Self-Organizing Maps

no code implementations12 Jan 2024 Zimeng Lyu, Alexander Ororbia, Rui Li, Travis Desell

In this work, we introduce a semi-supervised learning approach based on topological projections in self-organizing maps (SOMs), which significantly reduces the required number of labeled data points to perform parameter prediction, effectively exploiting information contained in large unlabeled datasets.

Decision Making Parameter Prediction +1

Online Evolutionary Neural Architecture Search for Multivariate Non-Stationary Time Series Forecasting

no code implementations20 Feb 2023 Zimeng Lyu, Alexander Ororbia, Travis Desell

Results demonstrate that ONE-NAS outperforms traditional statistical time series forecasting methods, including online linear regression, fixed long short-term memory (LSTM) and gated recurrent unit (GRU) models trained online, as well as state-of-the-art, online ARIMA strategies.

Neural Architecture Search Time Series +1

ONE-NAS: An Online NeuroEvolution based Neural Architecture Search for Time Series Forecasting

no code implementations27 Feb 2022 Zimeng Lyu, Travis Desell

Time series forecasting (TSF) is one of the most important tasks in data science, as accurate time series (TS) predictions can drive and advance a wide variety of domains including finance, transportation, health care, and power systems.

Neural Architecture Search Time Series +1

Continuous Ant-Based Neural Topology Search

no code implementations21 Nov 2020 AbdElRahman ElSaid, Joshua Karns, Zimeng Lyu, Alexander Ororbia, Travis Desell

This work introduces a novel, nature-inspired neural architecture search (NAS) algorithm based on ant colony optimization, Continuous Ant-based Neural Topology Search (CANTS), which utilizes synthetic ants that move over a continuous search space based on the density and distribution of pheromones, is strongly inspired by how ants move in the real world.

Neural Architecture Search Time Series +1

An Experimental Study of Weight Initialization and Weight Inheritance Effects on Neuroevolution

no code implementations21 Sep 2020 Zimeng Lyu, AbdElRahman ElSaid, Joshua Karns, Mohamed Mkaouer, Travis Desell

Weight initialization is critical in being able to successfully train artificial neural networks (ANNs), and even more so for recurrent neural networks (RNNs) which can easily suffer from vanishing and exploding gradients.

Evolutionary Algorithms Neural Architecture Search

Neuroevolutionary Transfer Learning of Deep Recurrent Neural Networks through Network-Aware Adaptation

no code implementations4 Jun 2020 AbdElRahman ElSaid, Joshua Karns, Alexander Ororbia II, Daniel Krutz, Zimeng Lyu, Travis Desell

Transfer learning entails taking an artificial neural network (ANN) that is trained on a source dataset and adapting it to a new target dataset.

Transfer Learning

Improving Neuroevolution Using Island Extinction and Repopulation

no code implementations15 May 2020 Zimeng Lyu, Joshua Karns, AbdElRahman ElSaid, Travis Desell

This island based strategy is additionally compared to NEAT's (NeuroEvolution of Augmenting Topologies) speciation strategy.

Evolutionary Algorithms Time Series +1

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