Search Results for author: Sangkyun Lee

Found 5 papers, 2 papers with code

Data Quality Measures and Efficient Evaluation Algorithms for Large-Scale High-Dimensional Data

1 code implementation5 Jan 2021 Hyeongmin Cho, Sangkyun Lee

Classical data quality measures tend to focus only on class separability; however, we suggest that in-class variability is another important data quality factor.

BIG-bench Machine Learning speech-recognition +1

Structure Learning of Gaussian Markov Random Fields with False Discovery Rate Control

no code implementations24 Oct 2019 Sangkyun Lee, Piotr Sobczyk, Malgorzata Bogdan

Adapting SL1 for probabilistic graphical models, we show that SL1 can be used for the structure learning of Gaussian MRFs using our suggested procedure nsSLOPE (neighborhood selection Sorted L-One Penalized Estimation), controlling the FDR of detecting edges.

Model Selection

Compressed Learning of Deep Neural Networks for OpenCL-Capable Embedded Systems

1 code implementation20 May 2019 Sangkyun Lee, Jeonghyun Lee

Even though the use of $\ell_1$-based sparse coding for model compression is not new, we show that it can be far more effective than previously reported when we use proximal point algorithms and the technique of debiasing.

Model Compression

Sparse Portfolio Selection via the sorted $\ell_{1}$-Norm

no code implementations6 Oct 2017 Philipp J. Kremer, Sangkyun Lee, Malgorzata Bogdan, Sandra Paterlini

We introduce a financial portfolio optimization framework that allows us to automatically select the relevant assets and estimate their weights by relying on a sorted $\ell_1$-Norm penalization, henceforth SLOPE.

Portfolio Optimization

Fast Saddle-Point Algorithm for Generalized Dantzig Selector and FDR Control with the Ordered l1-Norm

no code implementations18 Nov 2015 Sangkyun Lee, Damian Brzyski, Malgorzata Bogdan

In this paper we propose a primal-dual proximal extragradient algorithm to solve the generalized Dantzig selector (GDS) estimation problem, based on a new convex-concave saddle-point (SP) reformulation.

Variable Selection

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