Search Results for author: Donggyu Kim

Found 13 papers, 4 papers with code

Matrix-based Prediction Approach for Intraday Instantaneous Volatility Vector

no code implementations5 Mar 2024 Sung Hoon Choi, Donggyu Kim

In this paper, we introduce a novel method for predicting intraday instantaneous volatility based on Ito semimartingale models using high-frequency financial data.

Time Series

Revisiting Early-Learning Regularization When Federated Learning Meets Noisy Labels

no code implementations8 Feb 2024 Taehyeon Kim, Donggyu Kim, Se-Young Yun

In the evolving landscape of federated learning (FL), addressing label noise presents unique challenges due to the decentralized and diverse nature of data collection across clients.

Federated Learning Memorization

Large Global Volatility Matrix Analysis Based on Observation Structural Information

no code implementations2 May 2023 Sung Hoon Choi, Donggyu Kim

In this paper, we develop a novel large volatility matrix estimation procedure for analyzing global financial markets.

Large Volatility Matrix Analysis Using Global and National Factor Models

no code implementations25 Aug 2022 Sung Hoon Choi, Donggyu Kim

Several large volatility matrix inference procedures have been developed, based on the latent factor model.

Benchmark Dataset for Precipitation Forecasting by Post-Processing the Numerical Weather Prediction

1 code implementation30 Jun 2022 Taehyeon Kim, Namgyu Ho, Donggyu Kim, Se-Young Yun

Historically, this challenge has been tackled using numerical weather prediction (NWP) models, grounded on physics-based simulations.

Computational Efficiency Precipitation Forecasting

Effect of the U.S.--China Trade War on Stock Markets: A Financial Contagion Perspective

no code implementations18 Nov 2021 Minseog Oh, Donggyu Kim

From the empirical study, we find evidence of financial contagion from the U. S. to China and evidence that the risk contagion channel has changed from integrated volatility to negative jump variation.

Exponential GARCH-Ito Volatility Models

no code implementations8 Nov 2021 Donggyu Kim

This paper introduces a novel Ito diffusion process to model high-frequency financial data, which can accommodate low-frequency volatility dynamics by embedding the discrete-time non-linear exponential GARCH structure with log-integrated volatility in a continuous instantaneous volatility process.

Self-supervised Text-to-SQL Learning with Header Alignment Training

no code implementations11 Mar 2021 Donggyu Kim, Seanie Lee

Since we can leverage a large amount of unlabeled data without any human supervision to train a model and transfer the knowledge to target tasks, self-supervised learning is a de-facto component for the recent success of deep learning in various fields.

Self-Supervised Learning Text-To-SQL

Next Generation Models for Portfolio Risk Management: An Approach Using Financial Big Data

no code implementations25 Feb 2021 Kwangmin Jung, Donggyu Kim, Seunghyeon Yu

This paper proposes a dynamic process of portfolio risk measurement to address potential information loss.

Management

Overnight GARCH-Itô Volatility Models

no code implementations24 Feb 2021 Donggyu Kim, Minseok Shin, Yazhen Wang

Various parametric volatility models for financial data have been developed to incorporate high-frequency realized volatilities and better capture market dynamics.

FireSim: FPGA-Accelerated Cycle-Exact Scale-Out System Simulation in the Public Cloud

1 code implementation 45th ACM/IEEE International Symposium on Computer Architecture (ISCA 2018) 2018 Sagar Karandikar, Howard Mao, Donggyu Kim, David Biancolin, Alon Amid, Dayeol Lee, Nathan Pemberton, Emmanuel Amaro, Colin Schmidt, Aditya Chopra, Qijing Huang, Kyle Kovacs, Borivoje Nikolic, Randy Katz, Jonathan Bachrach, Krste Asanovic

We present FireSim, an open-source simulation platform that enables cycle-exact microarchitectural simulation of large scale-out clusters by combining FPGA-accelerated simulation of silicon-proven RTL designs with a scalable, distributed network simulation.

Asymptotic Theory for Estimating the Singular Vectors and Values of a Partially-observed Low Rank Matrix with Noise

1 code implementation21 Aug 2015 Juhee Cho, Donggyu Kim, Karl Rohe

In practice, the singular vectors and singular values of the low rank matrix play a pivotal role for statistical analyses and inferences.

Methodology

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