Search Results for author: Junghyo Jo

Found 19 papers, 7 papers with code

Upsample Guidance: Scale Up Diffusion Models without Training

no code implementations2 Apr 2024 Juno Hwang, Yong-Hyun Park, Junghyo Jo

We demonstrate that upsample guidance can be applied to various models, such as pixel-space, latent space, and video diffusion models.

Resolution Chromatography of Diffusion Models

no code implementations7 Dec 2023 Juno Hwang, Yong-Hyun Park, Junghyo Jo

In this paper, we introduce "resolution chromatography" that indicates the signal generation rate of each resolution, which is very helpful concept to mathematically explain this coarse-to-fine behavior in generation process, to understand the role of noise schedule, and to design time-dependent modulation.

Denoising Image Generation

GNRK: Graph Neural Runge-Kutta method for solving partial differential equations

1 code implementation1 Oct 2023 Hoyun Choi, Sungyeop Lee, B. Kahng, Junghyo Jo

Neural networks have proven to be efficient surrogate models for tackling partial differential equations (PDEs).

Tradeoff of generalization error in unsupervised learning

no code implementations10 Mar 2023 Gilhan Kim, Hojun Lee, Junghyo Jo, Yongjoo Baek

In this study, we propose that unsupervised learning generally exhibits a two-component tradeoff of the GE, namely the model error and the data error -- using a more complex model reduces the model error at the cost of the data error, with the data error playing a more significant role for a smaller training dataset.

Unsupervised Discovery of Semantic Latent Directions in Diffusion Models

no code implementations24 Feb 2023 Yong-Hyun Park, Mingi Kwon, Junghyo Jo, Youngjung Uh

Despite the success of diffusion models (DMs), we still lack a thorough understanding of their latent space.

Attribute

Mirror descent of Hopfield model

no code implementations29 Nov 2022 Hyungjoon Soh, Dongyeob Kim, Juno Hwang, Junghyo Jo

Mirror descent is an elegant optimization technique that leverages a dual space of parametric models to perform gradient descent.

Scale-invariant representation of machine learning

1 code implementation7 Sep 2021 Sungyeop Lee, Junghyo Jo

We observe that the frequency of internal codes or labels follows power laws in both supervised and unsupervised learning models.

BIG-bench Machine Learning Clustering

Information flows of diverse autoencoders

1 code implementation15 Feb 2021 Sungyeop Lee, Junghyo Jo

Thus, we conclude that the compression phase is not necessary for generalization in representation learning.

Information Plane Representation Learning

Inference of stochastic time series with missing data

no code implementations28 Jan 2021 Sangwon Lee, Vipul Periwal, Junghyo Jo

At the initial iteration of the EM algorithm, the model inference shows better model-data consistency with observed data points than with missing data points.

Time Series Time Series Analysis

Tractable loss function and color image generation of multinary restricted Boltzmann machine

no code implementations27 Nov 2020 Juno Hwang, Wonseok Hwang, Junghyo Jo

The restricted Boltzmann machine (RBM) is a representative generative model based on the concept of statistical mechanics.

Image Generation

Machine learning for the diagnosis of early stage diabetes using temporal glucose profiles

no code implementations18 May 2020 Woo Seok Lee, Junghyo Jo, Taegeun Song

Here we apply the machine learning (ML) for the diagnosis of early stage diabetes, which is known as a challenging task in medicine.

BIG-bench Machine Learning Time Series +1

Inverse Ising inference from high-temperature re-weighting of observations

no code implementations10 Sep 2019 Junghyo Jo, Danh-Tai Hoang, Vipul Periwal

Maximum Likelihood Estimation (MLE) is the bread and butter of system inference for stochastic systems.

Vocal Bursts Intensity Prediction

Data-driven inference of hidden nodes in networks

2 code implementations14 Jan 2019 Danh-Tai Hoang, Junghyo Jo, Vipul Periwal

Finally, an important hidden variable problem is to find the number of clusters in a dataset.

Data Analysis, Statistics and Probability Physics and Society

Immunological recognition by artificial neural networks

2 code implementations10 Aug 2018 Jin Xu, Junghyo Jo

To address this problem, we examine whether the affinity-based discrimination of peptide sequences is learnable and generalizable by artificial neural networks (ANNs) that process the digital experimental amino acid sequence information of receptors and peptides.

Broad cross-reactivity of the T-cell repertoire achieves specific and sufficiently rapid target searching

1 code implementation13 Dec 2017 Jin Xu, Junghyo Jo

We examine sequences of 10, 000 human T-cell receptors and 10, 000 antigenic peptides, and obtain a full spectrum of cross-reactivity of the receptor-peptide binding.

Resolution and Relevance Trade-offs in Deep Learning

no code implementations31 Oct 2017 Juyong Song, Matteo Marsili, Junghyo Jo

The fraction of inputs that are associated to the same state is a natural measure of similarity and is simply related to the cost in bits required to represent these inputs.

Causality inference in stochastic systems from neurons to currencies: Profiting from small sample size

2 code implementations18 May 2017 Danh-Tai Hoang, Juyong Song, Vipul Periwal, Junghyo Jo

We introduce a data-driven statistical physics approach to model inference based on minimizing a free energy of data and show superior model recovery for small sample sizes.

Data Analysis, Statistics and Probability Quantitative Methods

A Local Counter-Regulatory Motif Modulates the Global Phase of Hormonal Oscillations

no code implementations19 Jul 2016 Dong-Ho Park, Taegeun Song, Danh-Tai Hoang, Jin Xu, Junghyo Jo

By testing all possible motifs governing the interactions of these three cell types, we found that a unique set of positive/negative intra-islet interactions between different islet cell types functions not only to reduce the superficially wasteful zero-sum action of glucagon and insulin but also to enhance/suppress the synchronization of hormone secretions between islets under high/normal glucose conditions.

Minimal Perceptrons for Memorizing Complex Patterns

no code implementations12 Dec 2015 Marissa Pastor, Juyong Song, Danh-Tai Hoang, Junghyo Jo

We developed a new complexity measure of binary patterns, and estimated the minimal network size for memorizing them as a function of their complexity.

General Classification

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