A5000811088- Advanced Combustion Engine Technologies
- Engineering Applied Research
- Vehicle emissions and performance
- Catalytic Processes in Materials Science
- Combustion and flame dynamics
- Diverse Topics in Contemporary Research
- Biodiesel Production and Applications
- Asian Culture and Media Studies
- Educational Systems and Policies
- Fluid Dynamics and Heat Transfer
- Consumer Perception and Purchasing Behavior
- Folklore, Mythology, and Literature Studies
- Cultural and Historical Studies
- Rocket and propulsion systems research
- Electrohydrodynamics and Fluid Dynamics
- Advanced Wireless Network Optimization
- Internet of Things and Social Network Interactions
- Histone Deacetylase Inhibitors Research
- Korean Urban and Social Studies
- Advanced MIMO Systems Optimization
- Advanced Measurement and Detection Methods
- Cooperative Communication and Network Coding
- Traditional Chinese Medicine Studies
- Diverse Approaches in Healthcare and Education Studies
- Food Quality and Safety Studies
Electronics and Telecommunications Research Institute
2013-2024
Chong Kun Dang Bio (South Korea)
2024
Daejeon Institute of Science and Technology
2017
Korea Advanced Institute of Science and Technology
2017
Sungkyunkwan University
2016
Hanyang University
2001-2012
Mokpo National University
2010
In edge computing, most procedures, including data collection, processing, and service provision, are handled at nodes not in the central cloud. This decreases processing burden on cloud, enabling fast responses to end-device requests addition reducing bandwidth consumption. However, have restricted storage, energy resources support computation-intensive tasks such as deep neural network (DNN) inference. this study, we analyze effect of models with single multiple local exits DNN inference...
The purpose of this study was to investigate the combustion characteristics a direct-injection-type homogeneous charge compression ignition (HCCI) engine. From experimental study, we found that diesel HCCI phenomenon occurred in two stages pattern, which are cool flame and hot flame. To emission engine, evaluated influence intake air temperature, pressure, an additive on performance characteristics; particular, focused those flame, auto-ignition time, indicated mean effective pressure (IMEP)...
The purpose of this study is to investigate the overall spray behavior characteristics for various injection conditions in a gasoline direct injection(GDI) injector with multi-hole. characteristics, such as penetration, angle, and quantity, were studied through change pressure, ambient energizing duration high-pressure chamber constant volume. n-heptane 99.5% purity was used test fuel. In volume chamber, injected visualized by visualization system, which consisted high-speed camera,...
The structure must be periodically checked and measures taken to prevent deterioration in building construction. From this point of view, a nondestructive test is essential estimate whether the construction buildings proper, dimension depositing concrete consistent without damage. This study estimated thickness component framework using ultrasonic velocity method impact echo method, order investigate reliability estimation normal strength high concrete, leading following conclusions. In...
To improve the fuel consumption and exhaust emission for gasoline engines, GDI (gasoline direct injection) system was spotlighted to meet these requirements. Many researchers have performed studies investigate spray characteristics mixture formation of injector. In this work, we studied a injector by using entropy analysis particle image velocimetry (PIV) methods. The is based on concept statistical entropy, it identifies degree homogeneity in concentration. PIV algorithm developed elucidate...
The aim of this study is to investigate the effects nozzle orifice shapes and length-to-diameter ratio(L/D) on cavitation formation inside external flow pattern. used in work was tested taper rectangular which made from transparent acrylic acid resin. For studying effect L/D ratio, it three ratios 3.33, 10, 20. visualized by using ICCD camera optical system. This revealed that rate discharge coefficient() larger than those at same injection pressure. observed low pressure breakup liquid jet...
본 연구의 목적은 저속충돌에서 승용차량의 범퍼체결구조를 분석하기 위한 것이다. 차량의 손상성?수리성 향상 연구를 위해 범퍼체결구조가 서로 상이한 3개 차종에 대해 RCAR(세계자동차 수리기술위원회)의 저속충돌시험(전,후면 40% 오프셋 충돌시험) 기준을 적용하였다. 시험결과 충격흡수능력은 직사각형 단면형상을 가지고 그 부분이 범퍼레일에 삽입되는 크래시박스식의 범퍼스테이가 대부분의 차량에 적용되고 있는 다른 두 유형의 범퍼체결구조에 비해 우수하게 나타났다. 설계된 가지는 저속충돌사고 시 손상성?수리성을 향상시킴으로써 승객의 안전성도 강화시킬뿐만 아니라 수리비 절감에도 기여할 수 있다는 것이 연구에서 입증되었다.
High availability and reliability have been considered promising requirements for the support of seamless network services such as real‐time video streaming, gaming, virtual augmented reality. Increased can be achieved within a local area with use router redundancy protocol that utilizes backup routers to provide path in case master failure. However, may still lose large number packets during failover owing late failure detections lazy responses. To achieve an efficient failover, we propose...
최근 많은 수의 모바일 유저와 과도한 트래픽 증가를 해결하기 위한 솔루션으로 피코 혹은 펨토 셀과 같은 소형 셀을 설치하는 방법이 주목 받고 있다. 그러나 셀에 속한 엣지 유저들은 주변 기지국으로부터 극심한 셀간 간섭을 받기 때문에 낮은 평균 전송률을 얻게 되고, 이를 위해서는 셀 간 효과적으로 관리하는 필요하다. 최근의 연구들은 간섭 관리를 위해 기지국의 전송 전력을 제어하는 알고리즘을 제시하였지만, 제시된 방법들은 높은 복잡도를 가지고 중앙 도움을 필요로 한다는 단점이 본 연구에서는 기지국간의 경쟁을 기반으로 하여, 가지는 분산화된 방법의 기지국 전력 on/off 제어 및 유저 스케줄링 제안한다. 시뮬레이션 결과를 통해, 제안하는 하지 않는 방법에 비해 유저의 경우 170%의 성능 개선을 보이고, 최적의 알고리즘과 비교 했을 때 88-96%에 달하는 geometric average throughput (GAT) 매우 근접한 edge user (AET) 성능을 보임을...
This study described the effect of multiple injections and diesel-ethanol on NVH, combustion emission characteristics 4 cylinder common rail diesel engine. In order to investigate influence blended fuel in a light-duty engine, injection strategy was varied with pilot injection, double injections, one main at various operating conditions. The results showed that had longer ignition delay than ultra low fuel(ULSD). Also, case pressure is increased smoothly near TDC NVH are decreased....
Existing cellular technologies in unlicensed band such as license assisted access (LAA)-LTE do not capture inter-cell interference (ICI) management which becomes more important modern small cell network environments. Moreover, existing ICI techniques only can be operated licensed frequency due to their centralized properties, but also have high computational complexities. In this paper, by invoking distributed optimization, we propose a fully base station (BS) activation and user scheduling...