http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Multicasting tree 최소화를 위한 새로운 알고리즘
이영현(Y. H. Lee),김종(J. Kim),홍성제(S. J. Hong) 한국정보과학회 1997 한국정보과학회 학술발표논문집 Vol.24 No.2Ⅲ
본 논문은 point-to-point network에서 member의 변화가 많은 multicasting tree의 길이를 작게 만들기 위하여 Local Broadcasting Rearrangement(LBR)를 이용한 heuristic 방법을 제안하고 그 성능을 분석한다. 제안한 방법은 network상에서 3점을 최적으로 연결하는 방법을 기본으로 하여 비교적 방대한 tree의 부분 부분을 최적화해 나간다. 제안한 방법에서는 새로운 multicasting group의 member가 되기를 요청하는 add request나 기존의 multicasting group으로 부터 이탈하고자 하는 delete request가 있는 tree의 근처에서 부분적 최적화가 수행된다. 제안한 방법의 성능은 simulation을 이용하여 shortest path heuristic(SPH)과 비교를 통해 분석되었다. 일정한 양의 add나 delete request를 발생시키고 이 heuristic(SPH)과 비교를 통해 분석되었다. 일정한 양의 add나 delete request를 발생시키고 이 request를 제안 algorithm과 SPH로 각각 처리한 다음 최종적으로 얻은 tree의 전체 길이들을 얻어 두 결과를 서로 비교하였다.
자동차 차제조립용 지그설계 자동화 프로그램 개발에 관한 연구
이영현(H. Y. Lee),박동열(D. Y. Park),레콴환(L. Q. Hoan),웬치탄,김정래(J. L. Kim),백민규(M. K. baek),김현득(H. D. Kim),양순용(S. Y. Yang) 유공압건설기계학회 2014 유공압건설기계학회 학술대회논문집 Vol.2014 No.9
Some of leading companies introduced standard guidelines for design work in order to shorten the examination time and avoid repetitive work. For the purpose of work efficiency, automatic design programs also have been introduced though, they are managed partially in work field. Moreover, under previous way of JIG design, work time for design and probability of error occurrence increases in accordance with the amount of JIG units and the level of designing difficulty, which can lead to rise of manufacturing cost and falling-off in quality. Knowledge-Based JIG design system, however, introduced and applied, it isn’t only possible to reduce work time for error verification by automatic verification of possibility of error occurrence at the stage of design, but expected to reduce design work time and make error-free design output relatively through the process of assembling standard component part. On this thesis, I suggest and verify the design process analysis, establishing standard components for design, and a structure of JIG design system for organising knowledge-based system for JIG design.
자율주행자동차의 가속 및 비상정지 System에 관한 연구
이영현(Y.H. Lee),정찬세(C.S. Jeong),양순용(S.Y. Yang) 유공압건설기계학회 2014 유공압건설기계학회 학술대회논문집 Vol.2014 No.4
Autonomous vehicle according to the demands and requirements have increased, the number of autonomous vehicles in the field of research underway. In this paper, a hardware system to build autonomous vehicle and its performance evaluation technique was about Autonomous driving mode, the vehicle acceleration is the acceleration signal is generated by MCU, and brake and gear knob operation with high torque servo motor moves back and forth using. Installed on the vehicle front and rear fenders or remote emergency stop switch, emergency stop switch is activated, you can immediately press the brake pedal to Aircylinder the work was composed. Steering system is installed and configured with the controller and each part (MCU) to install, and proceed to test results obtained by the vehicle per hour 40㎞/h when you press the emergency stop within the standard rage of 20m to 10m was confirmed within the stop is possible.
Study on Turn-over Stability for Field Robot with Swinging Manipulator
Chi Thanh Nguyen(웬치탄),Y. H. Lee(이영현),S. Y. Yang(양순용) 유공압건설기계학회 2013 유공압건설기계학회 학술대회논문집 Vol.2013 No.6
The Field Robot is a kind of heavy machinery used in various applications worldwide, such as in agriculture, demolition, forestry, general construction, industry, mining and more. However, they pose a great danger to users and the surroundings when they turn over. In this paper, the motivation is the investigation of the stability of such machine without turning over. Therefore, when the manipulator rotates a circle, we compute the needed energy that is big enough to make such machine turning over. This energy, is interacted between external forces and moments and gravitational forces, is computed basing on concept of energy stability level. Similarly, this concept takes into consideration the instantaneous change of machine’s center of gravity position while the manipulator swings with a constant velocity. Moreover, inertial and manipulation effects usually appear in the motion of such vehicles when that are used for services or industrial applications. From the characteristics of stability are described in simulation results, we set necessary limits on swing velocity, operating zone … to ensure the safe of machine.