Search Results for author: Youngsuk Park

Found 14 papers, 5 papers with code

Variance-reduced Zeroth-Order Methods for Fine-Tuning Language Models

no code implementations11 Apr 2024 Tanmay Gautam, Youngsuk Park, Hao Zhou, Parameswaran Raman, Wooseok Ha

Evaluated across a range of both masked and autoregressive LMs on benchmark GLUE tasks, MeZO-SVRG outperforms MeZO with up to 20% increase in test accuracies in both full- and partial-parameter fine-tuning settings.

In-Context Learning

Theoretical Guarantees of Learning Ensembling Strategies with Applications to Time Series Forecasting

no code implementations25 May 2023 Hilaf Hasson, Danielle C. Maddix, Yuyang Wang, Gaurav Gupta, Youngsuk Park

Ensembling is among the most popular tools in machine learning (ML) due to its effectiveness in minimizing variance and thus improving generalization.

Time Series Time Series Forecasting

Testing Causality for High Dimensional Data

no code implementations14 Mar 2023 Arun Jambulapati, Hilaf Hasson, Youngsuk Park, Yuyang Wang

Determining causal relationship between high dimensional observations are among the most important tasks in scientific discoveries.

Vocal Bursts Intensity Prediction

First De-Trend then Attend: Rethinking Attention for Time-Series Forecasting

1 code implementation15 Dec 2022 Xiyuan Zhang, Xiaoyong Jin, Karthick Gopalswamy, Gaurav Gupta, Youngsuk Park, Xingjian Shi, Hao Wang, Danielle C. Maddix, Yuyang Wang

Transformer-based models have gained large popularity and demonstrated promising results in long-term time-series forecasting in recent years.

Time Series Time Series Forecasting

Robust Multivariate Time-Series Forecasting: Adversarial Attacks and Defense Mechanisms

1 code implementation19 Jul 2022 Linbo Liu, Youngsuk Park, Trong Nghia Hoang, Hilaf Hasson, Jun Huan

This work studies the threats of adversarial attack on multivariate probabilistic forecasting models and viable defense mechanisms.

Adversarial Attack Multivariate Time Series Forecasting +2

Robust Probabilistic Time Series Forecasting

1 code implementation24 Feb 2022 Taeho Yoon, Youngsuk Park, Ernest K. Ryu, Yuyang Wang

Probabilistic time series forecasting has played critical role in decision-making processes due to its capability to quantify uncertainties.

Decision Making Probabilistic Time Series Forecasting +1

Multivariate Quantile Function Forecaster

no code implementations23 Feb 2022 Kelvin Kan, François-Xavier Aubet, Tim Januschowski, Youngsuk Park, Konstantinos Benidis, Lars Ruthotto, Jan Gasthaus

We propose Multivariate Quantile Function Forecaster (MQF$^2$), a global probabilistic forecasting method constructed using a multivariate quantile function and investigate its application to multi-horizon forecasting.

Learning Quantile Functions without Quantile Crossing for Distribution-free Time Series Forecasting

no code implementations12 Nov 2021 Youngsuk Park, Danielle Maddix, François-Xavier Aubet, Kelvin Kan, Jan Gasthaus, Yuyang Wang

Quantile regression is an effective technique to quantify uncertainty, fit challenging underlying distributions, and often provide full probabilistic predictions through joint learnings over multiple quantile levels.

Time Series Time Series Forecasting

Variance Reduced Training with Stratified Sampling for Forecasting Models

no code implementations2 Mar 2021 Yucheng Lu, Youngsuk Park, Lifan Chen, Yuyang Wang, Christopher De Sa, Dean Foster

In large-scale time series forecasting, one often encounters the situation where the temporal patterns of time series, while drifting over time, differ from one another in the same dataset.

Time Series Time Series Forecasting

Domain Adaptation for Time Series Forecasting via Attention Sharing

1 code implementation13 Feb 2021 Xiaoyong Jin, Youngsuk Park, Danielle C. Maddix, Hao Wang, Yuyang Wang

Recently, deep neural networks have gained increasing popularity in the field of time series forecasting.

Domain Adaptation Time Series +1

Structured Policy Iteration for Linear Quadratic Regulator

no code implementations ICML 2020 Youngsuk Park, Ryan A. Rossi, Zheng Wen, Gang Wu, Handong Zhao

In this paper, we introduce the \textit{Structured Policy Iteration} (S-PI) for LQR, a method capable of deriving a structured linear policy.

Network Inference via the Time-Varying Graphical Lasso

1 code implementation6 Mar 2017 David Hallac, Youngsuk Park, Stephen Boyd, Jure Leskovec

Many important problems can be modeled as a system of interconnected entities, where each entity is recording time-dependent observations or measurements.

Time Series Time Series Analysis

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