A5100458509- Advanced Wireless Communication Techniques
- Advanced MIMO Systems Optimization
- Wireless Communication Networks Research
- Advanced Wireless Network Optimization
- Cooperative Communication and Network Coding
- Speech Recognition and Synthesis
- Advanced Memory and Neural Computing
- Iterative Learning Control Systems
- Smart Grid Energy Management
- Semiconductor materials and devices
- Ferroelectric and Negative Capacitance Devices
- PAPR reduction in OFDM
- Sensorless Control of Electric Motors
- Advancements in Photolithography Techniques
- Industrial Vision Systems and Defect Detection
- Optical Network Technologies
- Advanced Optical Imaging Technologies
- Thermochemical Biomass Conversion Processes
- Antenna Design and Optimization
- Nonlinear Differential Equations Analysis
- Genomics and Rare Diseases
- Elasticity and Wave Propagation
- Adaptive Control of Nonlinear Systems
- Smart Grid Security and Resilience
- Electrohydrodynamics and Fluid Dynamics
Samsung (South Korea)
2018-2023
Sungkyunkwan University
2008-2023
Chungbuk National University
2020
Yonsei University
2015
Kyushu Institute of Technology
2014
Market Matters
2009
Qualcomm (United States)
2009
Kangbuk Samsung Hospital
2008
Stanford University
2005-2006
An improved non-singular fast terminal sliding mode control (INFTSMC) is proposed in this study, to improve the dynamic speed regulation and tracking accuracy of a surface-mounted permanent magnet synchronous motor (SPMSM) system. A surface that completely removes singularities from controller input proposed. The key characteristics INFTSMC are convergence errors, high accuracy, robustness against disturbances. designed study proven be stable, with finite time stability based on Lyapunov...
High-density and high-speed DRAM requirements have been ever-increasing to achieve a better user experience for mobile systems, by adopting QHD (2560×1440), higher display resolutions, dual cameras, augmented reality, advanced driver-assistance systems. LPDDR4X has the hand-held memory of choice due its high speed (5.0Gb/s/pin [1]) low-power data retention (<0.1mW/Gb [2-3]), as well reliability in-DRAM ECC. The process continues scale down 10nm era meet ever increasing density (LPDDR4X...
Rearrangements of the subtelomeric regions chromosomes account for a significant proportion underlying genetic defects in both idiopathic mental retardation (MR) and multiple congenital anomalies. To detect rearrangements, set fluorescence situ hybridization (FISH) probes has been developed. The aim this study was to reveal frequency rearrangements Korean patients with MR or We performed FISH using commercially available on series unrelated pediatric anomalies without identifiable causes....
For multi-user orthogonal frequency division multiplexing (OFDM) systems, efficient optimal rate and power allocation algorithms are presented via geometric programming (GP), a special form of convex optimization problem for which very interior point methods exist. Both multiple access channel (MAC) broadcast (BC) considered the following two resource problems main interest: weighted sum-rate maximization (WSRmax) sum-power minimization (WSPmin). Utilizing degradedness BC on each tone,...
Sliding mode control and disturbance compensation techniques are applied to a nonlinear speed algorithm for permanent magnet synchronous motor (PMSM). Optimizing the performance of PMSM systems with various disturbances uncertainties is challenging. To achieve satisfactory performance, sliding method based on super-twisting reaching law (STRL) presented. STRL can adapt dynamically variations controlled system. The maintains high tracking controller allows input eliminate chattering. estimate...
In this work, the effects of various aliovalent impurities on resistance switching characteristics hafnium oxide (HfO2) films were investigated in conjunction with analyses chemical bonding states and film microstructure. HfO2 cosputtered magnesium, aluminum, niobium by reactive DC magnetron sputtering. Doping elements caused nonlattice oxygen concentration to increase grain size decrease. Also, post-thermal annealing induced a further doped HfO2. Impurity doping improved uniformities...
This paper proposes a new transmitting scheme for multi-antenna (MIMO) Gaussian broadcast channel. The transmitter exploits multiuser diversity using small amount of feedback information from the receivers. consists maximum achievable rate each user and necessary power distribution profile across spatial dimensions that should use to achieve rate. receivers iterative water-filling algorithm maximize serves single at transmission, hence name random beamforming (SUBF) scheme. proposed...
This paper proposes a new hybrid structure for the practical MIMO receiver. The receiver operates in QRMLD mode by default and achieves near-optimal performance. On other hand, when communication environment is not so favorable QR-MLD, it switches to QR-MMSE saves mobile computing power. Using common of QR decomposition from both receivers novel un-biasing technique, this can be implemented with great simplicity.
The difficulty of acquiring abundant, high-quality data, especially in multi-lingual contexts, has sparked interest addressing low-resource scenarios. Moreover, current literature rely on fixed expressions from language IDs, which results the inadequate learning representations, and failure to generate speech unseen languages. To address these challenges, we propose a novel method that directly extracts linguistic features audio input while effectively filtering out miscellaneous acoustic...
Classifying the patterns of defects in semiconductors is critical to finding root cause production defects. Especially as concentration density and design complexity semiconductor wafers increase, so do size severity The increased likelihood mixed makes them more complex than traditional wafer defect detection methods. Manually inspecting for costly, creating a need automated, artificial intelligence (AI)-based computer vision approaches. Previous research on analysis has several...
A 5Gb/s/pin 16Gb LPDDR4/4X reconfigurable SDRAM with a self-mode detection scheme, voltage-high keeper (VHK) for un-terminated load and prediction-based fast-tracking ZQ algorithm is implemented in 10nm class (2nd generation) DRAM process. Providing LVSTL mode scheme to support two different interface standards (LPDDR4/4X) depending on I/O supply voltage (VDDQ), proposed design can maintain the system compatibility longevity legacy controller PHY structure. The VHK LPDDR4 enables 3.2Gb/s...
<abstract> <p>In this paper, the stability problem with considering time-varying delays of linear systems is investigated. By constructing new augmented Lyapunov-Krasovskii (L-K) functionals based on auxiliary function-based integral inequality (AFBI) and Finsler's lemma, a criterion derived. Based previous result, less conservative result proposed through zero equality approach. Finally, numerical examples are given to show effect criteria.</p> </abstract>