Hyunhwa Kim

ORCID: 0000-0003-1965-9318
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About
Contact & Profiles
Research Areas
  • Electric and Hybrid Vehicle Technologies
  • Electric Vehicles and Infrastructure
  • Advanced Battery Technologies Research
  • Hydraulic and Pneumatic Systems
  • Vehicle emissions and performance
  • Microwave Dielectric Ceramics Synthesis
  • Layered Double Hydroxides Synthesis and Applications
  • Anesthesia and Sedative Agents
  • Ferroelectric and Piezoelectric Materials
  • Anesthesia and Neurotoxicity Research
  • Traffic control and management
  • Intensive Care Unit Cognitive Disorders
  • Vehicle Dynamics and Control Systems
  • Fuel Cells and Related Materials

Keimyung University
2021

Sungkyunkwan University
2017-2018

Kyung Hee University
1998

Tokyo Institute of Technology
1998

What is the best number of gear steps for parallel type hybrid electric vehicles (HEVs) and what are pros cons power split HEV compared to have been interesting issues in development HEVs. In this study, a comparative analysis was performed evaluate fuel economy potential HEV. First, investigated steps. Four-speed, six-speed, eight-speed automatic transmissions (ATs) continuously variable transmission (CVT) were selected, their drivetrain losses considered dynamic programming (DP). It found...

10.3390/en11082103 article EN cc-by Energies 2018-08-13

This paper presents a design of electrified hydraulic control system for parallel type hybrid electric vehicle (HEV) with continuously variable transmission (CVT). Considering the characteristics and CVT feature which requires high line pressure to supply demanded clamping force, three system: (1) 1-MOP+1-EOP, (2) 2-EOP (3) 1-EOP were proposed energy consumption was evaluated. The EOP displacement designed considering flow rate pump efficiency. To investigate amount flow, system, an...

10.1109/ever.2018.8362364 article EN 2018-04-01

This paper presents an advanced rule-based mode control strategy (ARBC) for a plug-in hybrid electric vehicle (PHEV) considering the driving cycle characteristics and present battery state of charge (SOC). Using dynamic programming (DP) results, behavior optimal operating was investigated city (UDDS×2, JC08 ×2) highway (HWFET ×2, NEDC cycles. It found that selection varies according to SOC. To consider these characteristics, predictive map developed using machine learning algorithm, ARBC...

10.3390/en11010089 article EN cc-by Energies 2018-01-01

The purpose of this study was to identify the incidence postoperative delirium in PCC (patients with colorectal cancer) and related factors by analysing differences general, disease-related operation-related characteristics.Previous studies had some limitations generalising risk for due lack relevant factors, such as disease- characteristics. There is a need investigate including cancer surgical characteristics.The current cross-sectional correlated PCC.A total 196 patients who underwent...

10.1111/jocn.15894 article EN Journal of Clinical Nursing 2021-06-07

In this study, influence of number gear step on the engine and motor operation is investigated for a parallel hybrid electric vehicle(HEV). 6-speed automatic transmission (AT), 8-speed AT continuously variable transmission(CVT) are selected target HEV comparative analysis performed. order to obtain maximum fuel economy potential, backward simulators developed based dynamic programming by considering efficiency, power electronics system hydraulic loss. From simulation results, it found that...

10.1109/ever.2018.8362368 article EN 2018-04-01

The defective layered structure of the oxide RbLaSrNb2CuO9 was transformed into three-dimensional perovskite under high pressure (5 GPa). RbLaSrNb2MIIO9 (M = Mg and Zn) prepared could be also added to growing list perovskite-related phases.

10.1021/cm9801892 article EN Chemistry of Materials 1998-08-13
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