Search Results for author: Jong-Ho Lee

Found 10 papers, 2 papers with code

Pulse-Width Modulation Neuron Implemented by Single Positive-Feedback Device

no code implementations23 Aug 2021 Sung Yun Woo, Dongseok Kwon, Byung-Gook Park, Jong-Ho Lee, Jong-Ho Bae

Positive-feedback (PF) device and its operation scheme to implement pulse width modulation (PWM) function was proposed and demonstrated, and the device operation mechanism for implementing PWM function was analyzed.

Machine-Learning Approach to Analyze the Status of Forklift Vehicles with Irregular Movement in a Shipyard

no code implementations29 Sep 2020 Hyeonju Lee, Jong-Ho Lee, Minji An, Gunil Park, Sungchul Choi

We use the DBSCAN and k-means algorithms to identify the area in which a particular forklift is operating and the type of work it is performing.

BIG-bench Machine Learning Management

Hardware Implementation of Spiking Neural Networks Using Time-To-First-Spike Encoding

no code implementations9 Jun 2020 Seongbin Oh, Dongseok Kwon, Gyuho Yeom, Won-Mook Kang, Soochang Lee, Sung Yun Woo, Jang Saeng Kim, Min Kyu Park, Jong-Ho Lee

Furthermore, the effect of the device variation on the accuracy in temporally encoded SNN is investigated and compared with that of the rate-encoded network.

Geometric Sequence Decomposition with $k$-simplexes Transform

no code implementations31 Oct 2019 Woong-Hee Lee, Jong-Ho Lee, Ki Won Sung

This paper presents a computationally efficient technique for decomposing non-orthogonally superposed $k$ geometric sequences.

Nonlinear Dipole Inversion (NDI) enables Quantitative Susceptibility Mapping (QSM) without parameter tuning

no code implementations30 Sep 2019 Daniel Polak, Itthi Chatnuntawech, Jaeyeon Yoon, Siddharth Srinivasan Iyer, Jong-Ho Lee, Peter Bachert, Elfar Adalsteinsson, Kawin Setsompop, Berkin Bilgic

We propose Nonlinear Dipole Inversion (NDI) for high-quality Quantitative Susceptibility Mapping (QSM) without regularization tuning, while matching the image quality of state-of-the-art reconstruction techniques.

Exploring linearity of deep neural network trained QSM: QSMnet+

1 code implementation17 Sep 2019 Woojin Jung, Jaeyeon Yoon, Joon Yul Choi, Jae Myung Kim, Yoonho Nam, Eung Yeop Kim, Jong-Ho Lee

To overcome this limitation, a data augmentation method is proposed to generalize the network for a wider range of susceptibility.

Image and Video Processing

Unsupervised Online Learning With Multiple Postsynaptic Neurons Based on Spike-Timing-Dependent Plasticity Using a TFT-Type NOR Flash Memory Array

no code implementations17 Nov 2018 Soochang Lee, Chul-Heung Kim, Seongbin Oh, Byung-Gook Park, Jong-Ho Lee

We present a two-layer fully connected neuromorphic system based on a thin-film transistor (TFT)-type NOR flash memory array with multiple postsynaptic (POST) neurons.

General Classification

Quantitative Susceptibility Mapping using Deep Neural Network: QSMnet

1 code implementation15 Mar 2018 Jaeyeon Yoon, Enhao Gong, Itthi Chatnuntawech, Berkin Bilgic, Jingu Lee, Woojin Jung, Jingyu Ko, Hosan Jung, Kawin Setsompop, Greg Zaharchuk, Eung Yeop Kim, John Pauly, Jong-Ho Lee

The QSMnet maps of the test dataset were compared with those from TKD and MEDI for image quality and consistency in multiple head orientations.

Image and Video Processing

Adaptive Learning Rule for Hardware-based Deep Neural Networks Using Electronic Synapse Devices

no code implementations20 Jul 2017 Suhwan Lim, Jong-Ho Bae, Jai-Ho Eum, Sungtae Lee, Chul-Heung Kim, Dongseok Kwon, Byung-Gook Park, Jong-Ho Lee

In this paper, we propose a learning rule based on a back-propagation (BP) algorithm that can be applied to a hardware-based deep neural network (HW-DNN) using electronic devices that exhibit discrete and limited conductance characteristics.

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