http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Study on Impact-Ionization MOS for 1T-DRAM Operation
Jangho Jung(정장호),Hamin Park(박하민) 대한전자공학회 2023 대한전자공학회 학술대회 Vol.2023 No.11
In this paper, we implemented and analyzed the impact-ionization MOS (I-MOS) for 1T-DRAM using TCAD simulation. Based on a TCAD model with reliability ensured through calibration, we demonstrated the feasibility of 1T-DRAM operation through I-MOS parameter optimization and additional Boron doping in the channel region to induce the hysteresis. Furthermore, we analyzed the drain current variation and memory window through a region-specific impact ionization and charge transport analysis of the I-MOS device.
엔진 폐열 회수를 위한 랭킨 스팀 사이클용 열교환기의 유동 및 구조적 특성 연구
정장호(Jangho Jung),김구성(Kusung Kim),이성욱(Seangwock Lee),허형석(Hyungseok Heo),이홍열(Hongyeol Lee) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
A 2-loop waste heat recovery system with Rankine steam cycles for the improvement of fuel efficiency of gasoline vehicles has been investigated. A high temperature loop is used to recover waste heat from exhaust gas and a low temperature loop is used to recover waste heat from cold engine coolant. In this paper has dealt with a layout of low temperature loop system, the review of the factors through numerical analysis. According to the result of analysis, the designed heat exchanger, LT Boiler has low equivalent stress than ultimate stress of the material. And comparing with flow analysis results, LT Boiler is safe to operation.
박현창(Hyunchang Park),정장호(Jangho Jung),김다은(Daeun Kim),노경완(Kyungwna Rho) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11
Recently, foreign countries are making efforts to solve energy saving and high-efficiency technology development, greenhouse gas reduction. The measures to streamline energy demand announced by Korea government are part of the new energy policy defined as raising energy efficiency 25 percent in 2027. The main content is a new fuel economy policy will be introduced for heavy-duty vehicles(HDV) of over 3.5 tons in capacity. In order to implement the fuel economy policy for HDV, it is necessary to calculate the fuel economy of the target vehicle. But it is the fuel economy measurement and calculation method of HDV has not yet been defined in Korea. In particular, there is no method for calculating the fuel economy of CNG buses, which account for the majority of city buses. In this study, a method for calculating the fuel economy of CNG bus, which is not defined in the vehicle fuel economy test, was developed. CNG bus was tested on a chassis dynamometer, and the measured fuel economy and real driving fuel economy were compared and analyzed.
실린더 라이너의 오일포켓 형성이 마찰특성에 미치는 영향에 관한 연구
서준호(JoonHo Seo),나병철(ByungChul Na),임대순(DeaSoon Lim),정장호(JangHo Jung),이석준(SeokJoon Lee),한정민(JungMin Han) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Since the friction between piston rings and cylinder liner takes up the biggest part of the energy loss in engines, surface design of cylinder liner is a very important factor. There are many researches in progress because this directly relates to fuel consumption, emissions, and durability. This research confirmed the technology of storing lubricants on cylinder liner through creating oil pockets, and applying CrN+DLC Coating on piston rings. Auto parts that are actually used on real vehicles were experimentally put together, and Tribology characteristics of each combination were analysed to confirm friction reduction by application of CrN+DLC Coating technology. By applying CrN+DLC Coating and chemical micro texturing skills to actual vehicles, fuel consumption reduction, emissions reduction, vibration reduction, and improvement in durability are expected.