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마코프 재생과정을 이용한 ATM 트래픽 모델링 및 성능분석
정석윤,허선 한국경영과학회 1999 韓國經營科學會誌 Vol.24 No.3
In order to build and manage an ATM network effectively under several types of control methods. It is necessary to estimate the performance of the equipments in various viewpoints, especially of ATM multiplexer. As for the method to model the input stream into the ATM multiplexer, many researches have been done to characterize it by, such as, fluid flow, MMPP(Markov Modulated Poisson Process), or MMDP(Markov Modulated Deterministic Process). We introduce and MRP(Markov Renewal Process) to model the input stream which has proper structure to represent the burst traffic with high correlation. In this paper, we build a model for aggregated heterogeneous ON-OFF sources of ATM traffic by MRP. We make discrete time MR/D/1/B queueing system, whose input process is the superposed MRP and present a performance analysis by finding CLP(Cell Loss Probability). A simulation is done to validate our algorithm.
정석윤,엄정호 대전대학교 군사연구원 2006 군사학연구 Vol.15 No.-
The development of local defense parts has played a role a pure function such as maintenance of stable procurement source of military goods, provision of timely supply, establishment of self-defense base, creation of import substitution effect considering the whole life-cycle cost, reduction of foreign currency and protection of domestic defense industry. However, as the development success rate is deteriorating, it is time to analyze the related policies and improve the system. In order to improve the success rate of development of parts for the defense sector, it is necessary to unify the separated policies by the development-related departments and strengthen the policy support for the development companies to actively participate in the development. In addition, it is necessary to improve the paradigm for the selection of development items and change the authority of selecting development items and to delegate authority to create synergies. Parts localization development policy improvement is military support side it will contribute to strengthening defense power management by organically combining with technological development aspect and economical aspect. Development items will be linked to defense exports, which will have a remarkable effect on sales growth and job creation effects. The development of local defense parts is spreading.
정석윤,진광식,윤태성 國立 昌原大學校 產業技術硏究院 2004 産技硏論文集 Vol.18 No.-
Accurate position estimation is required for mobile robot navigation. To estimate current position, mobile robot uses sensors. As one sensor or two sensors system is insufficient to estimate accurately, it is necessary to use sensor fusion method. Mobile robot can obtain redundant and complementary information by using sensor fusion method. It is possible to estimate current position more accurately than one sensor or two sensors system. Sensor fusion system is composed of vision sensor, ultrasonic sensors and encoder sensor. Personal computer and interface board control three different sensors. Extended Kalman Filter(EKF) method using three different sensors is proposed for sensor fusion. The validity of the proposed sensor fusion method is proved by experimental results in indoor environment.
정석윤,엄정호,Jung, Suk-Yun,Eom, Jung-Ho 대전대학교 군사연구원 2018 군사학연구 Vol.15 No.-
The development of local defense parts has played a role a pure function such as maintenance of stable procurement source of military goods, provision of timely supply, establishment of self-defense base, creation of import substitution effect considering the whole life-cycle cost, reduction of foreign currency and protection of domestic defense industry. However, as the development success rate is deteriorating, it is time to analyze the related policies and improve the system. In order to improve the success rate of development of parts for the defense sector, it is necessary to unify the separated policies by the development-related departments and strengthen the policy support for the development companies to actively participate in the development. In addition, it is necessary to improve the paradigm for the selection of development items and change the authority of selecting development items and to delegate authority to create synergies. Parts localization development policy improvement is military support side it will contribute to strengthening defense power management by organically combining with technological development aspect and economical aspect. Development items will be linked to defense exports, which will have a remarkable effect on sales growth and job creation effects. The development of local defense parts is spreading.