Search Results for author: Tommaso Biancalani

Found 14 papers, 7 papers with code

Feedback Efficient Online Fine-Tuning of Diffusion Models

no code implementations26 Feb 2024 Masatoshi Uehara, Yulai Zhao, Kevin Black, Ehsan Hajiramezanali, Gabriele Scalia, Nathaniel Lee Diamant, Alex M Tseng, Sergey Levine, Tommaso Biancalani

It is natural to frame this as a reinforcement learning (RL) problem, in which the objective is to fine-tune a diffusion model to maximize a reward function that corresponds to some property.

reinforcement-learning Reinforcement Learning (RL)

Conformalized Deep Splines for Optimal and Efficient Prediction Sets

1 code implementation1 Nov 2023 Nathaniel Diamant, Ehsan Hajiramezanali, Tommaso Biancalani, Gabriele Scalia

SPICE is compatible with two different efficient-to-compute conformal scores, one oracle-optimal for marginal coverage (SPICE-ND) and the other asymptotically optimal for conditional coverage (SPICE-HPD).

Conformal Prediction Prediction Intervals

Complex Preferences for Different Convergent Priors in Discrete Graph Diffusion

no code implementations5 Jun 2023 Alex M. Tseng, Nathaniel Diamant, Tommaso Biancalani, Gabriele Scalia

Diffusion models have achieved state-of-the-art performance in generating many different kinds of data, including images, text, and videos.

RINGER: Rapid Conformer Generation for Macrocycles with Sequence-Conditioned Internal Coordinate Diffusion

1 code implementation30 May 2023 Colin A. Grambow, Hayley Weir, Nathaniel L. Diamant, Alex M. Tseng, Tommaso Biancalani, Gabriele Scalia, Kangway V. Chuang

Macrocyclic peptides are an emerging therapeutic modality, yet computational approaches for accurately sampling their diverse 3D ensembles remain challenging due to their conformational diversity and geometric constraints.

Benchmarking

CREMP: Conformer-Rotamer Ensembles of Macrocyclic Peptides for Machine Learning

no code implementations14 May 2023 Colin A. Grambow, Hayley Weir, Christian N. Cunningham, Tommaso Biancalani, Kangway V. Chuang

Computational and machine learning approaches to model the conformational landscape of macrocyclic peptides have the potential to enable rational design and optimization.

Protein Structure Prediction

Towards Understanding and Improving GFlowNet Training

1 code implementation11 May 2023 Max W. Shen, Emmanuel Bengio, Ehsan Hajiramezanali, Andreas Loukas, Kyunghyun Cho, Tommaso Biancalani

We investigate how to learn better flows, and propose (i) prioritized replay training of high-reward $x$, (ii) relative edge flow policy parametrization, and (iii) a novel guided trajectory balance objective, and show how it can solve a substructure credit assignment problem.

GraphGUIDE: interpretable and controllable conditional graph generation with discrete Bernoulli diffusion

1 code implementation7 Feb 2023 Alex M. Tseng, Nathaniel Diamant, Tommaso Biancalani, Gabriele Scalia

Our framework for graph diffusion can have a large impact on the interpretable conditional generation of graphs, including the generation of drug-like molecules with desired properties in a way which is informed by experimental evidence.

Graph Generation

Improving Graph Generation by Restricting Graph Bandwidth

1 code implementation25 Jan 2023 Nathaniel Diamant, Alex M. Tseng, Kangway V. Chuang, Tommaso Biancalani, Gabriele Scalia

However, one of the main limitations of existing methods is their large output space, which limits generation scalability and hinders accurate modeling of the underlying distribution.

Graph Generation

NODAGS-Flow: Nonlinear Cyclic Causal Structure Learning

1 code implementation4 Jan 2023 Muralikrishnna G. Sethuraman, Romain Lopez, Rahul Mohan, Faramarz Fekri, Tommaso Biancalani, Jan-Christian Hütter

Learning causal relationships between variables is a well-studied problem in statistics, with many important applications in science.

Hierarchically branched diffusion models leverage dataset structure for class-conditional generation

1 code implementation21 Dec 2022 Alex M. Tseng, Max Shen, Tommaso Biancalani, Gabriele Scalia

We highlight several advantages of branched diffusion models over the current state-of-the-art methods for class-conditional diffusion, including extension to novel classes in a continual-learning setting, a more sophisticated form of analogy-based conditional generation (i. e. transmutation), and a novel interpretability into the generation process.

Continual Learning

A 3D-Shape Similarity-based Contrastive Approach to Molecular Representation Learning

no code implementations3 Nov 2022 Austin Atsango, Nathaniel L. Diamant, Ziqing Lu, Tommaso Biancalani, Gabriele Scalia, Kangway V. Chuang

Molecular shape and geometry dictate key biophysical recognition processes, yet many graph neural networks disregard 3D information for molecular property prediction.

Contrastive Learning Molecular Property Prediction +3

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