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Homogeneous RFID 시스템에서 다수의 리더 충돌 방지 기법
권대욱(Daewook Kwon),김동우(Dongwoo Kim),이태진(Tae-Jin Lee) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.11
Typical RFID readers anti-collision protocol is Low-Energy Localized Clustering for RFID Networks (LLCR). LLCR is the protocol that minimizes the interference by regulating the RFID reader’s cluster radius, but it is difficult in many readers system. In this paper, we propose the protocol that three neighboring readers and another three neighboring readers at a long distance are operated stepwise for homogeneous RFID system.
권대욱(Dae Wook Kwon),김좌헌(JoaHun Kim),조건희(Kun Hee Cho),이형철(Hyeongcheol Lee) 한국자동차공학회 2020 한국자동차공학회 학술대회 및 전시회 Vol.2020 No.11
In this paper, we classified and composed a set of driving scenarios based on the statistical results of the Traffic Accident Analysis System of the Road Traffic Authority. The driving environmental data and the relative distance between the vehicles were obtained using dSPACE’s ASM (Automotive Simulation Models) and Driving Simulator, respectively. At this time, the relative distance and relative speed were calculated using the position, speed, and acceleration of the autonomous vehicle and the of the surrounding vehicles. Since we need responses of driver or occupant to determine whether autonomous vehicle is appropriate or not, we created an input signal called ‘Trigger Signal’. The driver or occupant trigger it only for inappropriate driving situation of each scenarios. With this experimental data, we built MLP (Multilayer Perceptron) based on MATLAB and collected environmental/vehicle data and triggered signal were dealt with input/output for training MLP, respectively. Then the output of MLP is quantitatively considered as driving suitability index to visualize how driving situation is appropriate or not. With this designed index, it can be used for designing threshold of controllers in ADAS (Advanced Driver Assistance System)/AV (Automated Vehicle) systems to consider various drivers’ acceptances.
권대욱(Dae-Wook Kwon),구원(Won Ku),이석우(Seok-Woo Lee),송봉기(Bong-Gi Song) 대한전자공학회 2015 대한전자공학회 학술대회 Vol.2015 No.6
Recently, The needs for convenience of a driver are increased. One of the requirements of the user experience is the development of hands-free trunk module. This module can be operated by user kick when a user carry things or hold umbrella in rainy weather. In this paper, we suggest a hands-free trunk module based on kick recognition algorithm. Also we suggest a testing method for it. The suggested system uses two electrostatic capacitance sensors. The upper sensor is used to indicate user access, and the other sensor is used to recognize user kick. We also propose a testing method for hands-free trunk module using image processing.
국제건설 Project Cash Flow의 개선과 최적화 요건에 관한 체계적 연구 : FIDIC 국제표준계약조건 및 일정-현금흐름 통합을 중심으로
조희영,권대욱 동국대학교 경영대학원 1999 經營論叢-東國大學校 經營大學院 Vol.23 No.-
This study critically observes the problems associated with the cash flows in international construction projects by analyzing its structures in lieu of the conditions of contract of the project and further studing the possibilities and prerequisite conditions for developing a mathematical model and heuristic procedures for its optimization We reviewed the relevant clauses in the Conditions of Contract for Works of Civil Engineering Construction of FIDIC 4th Edition, 1987 and recommended the several measures to be taken by the Contractors to improve its project cash flow, which include minimization of lead time in various payments such as interim payment, advance payment, final payment and substitution of retention money by bonds or securities. We further reviewed the existing project scheduling problems with an attempt to define the possibilities and requirements to be considered for Project Cash Flow optimization for Resource Constrained Project Scheduling Problems with Multiple Crashable Modes(RCPSPMCM) and the followings are the results: 1. The optimization of Project Cash Flow for RCPSPMCM is possible if the heuristic procedures for finding exact solution be developed. 2. The model would require mathematical definition for various variables and factors affecting project cash flow in real situation 3. The factors to be considered should include various precedence relations among activities, changes in execution costs and resources as activity start time varies, duration, periodical cash flow changes and its segmentation, lead time and conditions for interim payment, advance payment, retention money, bonus and liqidated damages.
도로 기하 정보를 적용한 다중 모델 기반의 확률적인 차량 경로 예측
남기혜(Gihye Nam),권대욱(Daewook Kwon),조건희(Kunhee Cho),이형철(Heongcheol Lee) 한국자동차공학회 2020 한국자동차공학회 부문종합 학술대회 Vol.2020 No.7
This paper proposed a multi-model based stochastic vehicle trajectory prediction algorithm using road geometry information. The probability of collision with surrounding vehicles has been suggested as an indicator for determining the suitability of an autonomous driving system. To estimate vehicle behavior in complicated situation in usual roadway, the road geometry and the model-based estimation of various vehicle behaviors should be integrated. the Interacting Multiple Model (IMM) filter with a curvilinear coordinate system is used for model integration to estimation vehicle behavior from complex road geometry information. Moreover, each probabilities of basis models are used to predict trajectory of surrounding vehicles. This proposed method was designed in simulation environment and validated with various scenarios such as lane keeping and lane changing in curved road.