Search Results for author: Charles B. Delahunt

Found 9 papers, 6 papers with code

Metrics to guide development of machine learning algorithms for malaria diagnosis

no code implementations14 Sep 2022 Charles B. Delahunt, Noni Gachuhi, Matthew P. Horning

Two factors in particular are crucial to developing algorithms translatable to clinical field settings: (i) Clear understanding of the clinical needs that ML solutions must accommodate; and (ii) task-relevant metrics for guiding and evaluating ML models.

A toolkit for data-driven discovery of governing equations in high-noise regimes

1 code implementation8 Nov 2021 Charles B. Delahunt, J. Nathan Kutz

Second, we propose a technique, applicable to any model discovery method based on x' = f(x), to assess the accuracy of a discovered model in the context of non-unique solutions due to noisy data.

Model Discovery Time Series +1

Insect Cyborgs: Bio-mimetic Feature Generators Improve ML Accuracy on Limited Data

1 code implementation NeurIPS Workshop Neuro_AI 2019 Charles B. Delahunt, J. Nathan Kutz

In this work we deploy MothNet, a computational model of the moth olfactory network, as an automatic feature generator.

Money on the Table: Statistical information ignored by Softmax can improve classifier accuracy

no code implementations26 Jan 2019 Charles B. Delahunt, Courosh Mehanian, J. Nathan Kutz

To explore this potential resource, we develop a hybrid classifier (Softmax-Pooling Hybrid, $SPH$) that uses Softmax on high-scoring samples, but on low-scoring samples uses a log-likelihood method that pools the information from the full array $D$.

Insect cyborgs: Bio-mimetic feature generators improve machine learning accuracy on limited data

1 code implementation23 Aug 2018 Charles B. Delahunt, J. Nathan Kutz

In this work, we deployed MothNet, a computational model of the insect olfactory network, as an automatic feature generator: Attached as a front-end pre-processor, its Readout Neurons provided new features, derived from the original features, for use by standard ML classifiers.

BIG-bench Machine Learning

Putting a bug in ML: The moth olfactory network learns to read MNIST

1 code implementation15 Feb 2018 Charles B. Delahunt, J. Nathan Kutz

The Moth Olfactory Network is among the simplest biological neural systems that can learn, and its architecture includes key structural elements and mechanisms widespread in biological neural nets, such as cascaded networks, competitive inhibition, high intrinsic noise, sparsity, reward mechanisms, and Hebbian plasticity.

BIG-bench Machine Learning Transfer Learning

Biological Mechanisms for Learning: A Computational Model of Olfactory Learning in the Manduca sexta Moth, with Applications to Neural Nets

1 code implementation8 Feb 2018 Charles B. Delahunt, Jeffrey A. Riffell, J. Nathan Kutz

From a biological perspective, the model provides a valuable tool for examining the role of neuromodulators, like octopamine, in learning, and gives insight into critical interactions between sparsity, Hebbian growth, and stimulation during learning.

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