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박세승,노영주 한국통신학회 1997 韓國通信學會論文誌 Vol.22 No.6
Full motion video data is the most effective data type that transmits information in multimedia enviornment. VOD service is system that uses network to transmit full motion video data interactively. Therefore VOD service system must satisfy the following requirements. First, it should transmit high quality full motion video. Second, it should be able to control a large quantity of full motion video. Third, a user should be able to retrieve the full motion vide effectively. However the existing VOD service system is established based n file system that not only does it have disadvantages in managment such as transaction control but also it is not suitable for distributed multimedia environment. The goal of this research is to build a VOD service system that provides high-quality full motion video assuming information retrieval. In order to mainly search video data's bibliographical information and to manage related information, VOD service system and DBMS system are to be closely related. Also, to transmit high quality full motion video data, we use MTP$^{TM}$(Media Transfer Protocol) developed by StarLight. MTP$^{TM}$ guarantees high bandwidth that is necessary to tansmit high quality full motion video data effectively. In other hand TCP/IP which is used for information search does not guarentee high bandwidth as that in MTP$^{TM}$. Therfore VOD service system that seraches information managed by DBMS and transmits requried full motion video data should control different kinds of protocol simultaneously. This paper describes the configuration of VODB system that has solved these problems, implementation and efficiency of data applied system.stem.
朴世承,崔鎭卓 조선대학교 동력자원연구소 1985 動力資源硏究所誌 Vol.7 No.1
This paper deals with optimal synthesis of an RC highpass ladder network. It shows how to obtain a network with the maximum possible gain and minimum total series capacitance. The current transfer function, source and load conductances are specified. Lagrange multiliers method is used to obtain optimization. The entire process is completed using a microcomputer which can handle a large number of poles and can perform the optimization in a very short time.
CTM을 위한 로보트 매니퓰레이터의 VSMFC 제어기 설계
박세승,박종국,Park, Sei-Seung,Park, Chong-Kug 대한전자공학회 1990 전자공학회논문지 Vol. No.
로보트 매니퓰레이터를 제어하는데 있어서, 토오크 계산법을 이용한 새로운 가변구조 모델 추종제어기를 설계한다. 슬라이딩 모드가 존재하기 위한 충부조건은 Lyapunov 함수에 의해 유도된다. 기준 모델은 이중 적분기를 사용하고 가속도 입력은 시스템의 안정성과 원하는 성능을 얻기 위하여 비례-미분 제어기로 구성한다. 제안된 제어기법은 매니퓰레이터 동력학 방정식 각 항들의 상한값과 추정값을 부여함으로써 정확한 매개변수의 지식과 역행렬 계산을 요구하지 않는다. 따라서 모의실험 결과 제어된 제어기가 목적궤적의 수렴성이 개선되었음을 보여준다. In the control of robot manipulators, this paper presents a design of a new variable structure model following controller(VSMFC) using computed torque method (CTM). A sufficient condition for the existence of a sliding mode is derived by Lyapunov function. The reference model is a double integrators and the acceleration input consists of a proportional-derivative controller for the purpose of the stabilization of system and the desired performance. The proposed control scheme which consists of upper bounded and estimated value of each term of the manipulator of matrix inversion. Therefore the simulation results show that this controller is improved to the convergence of desired trajectories.
박세승(Se-Seung Park) 한국정보기술학회 2009 Proceedings of KIIT Conference Vol.2009 No.-
본 연구에서는 2상 PM형 스테핑 모터를 사용하여 유니폴라 구동방식을 사용한 2상 여자 운전 방식을 채택했으며 스텝모터의 제어에 있어서 각상의 제어 펄스폭이 일정하지 않아 발생되는 난조의 해결방법을 기술하였고 제어 및 구동회로를 설계 제작하여 실험을 통해서 입증하였다. In this paper, experimental study of control and drive circuit on a 2-phase PM type stepping motor was discussed. In the experimental study, the advanced drive circuits constructed by exciting circuits which is applied to changed control pulse circuits and driver pulse circuit were presented. Good exciting signal were obtained for pulse waves forms after changing driver circuit. Conclusively, the experimental result showed the constant of control pulse wave forms.
동적 이벤트 처리 기반의 RFID 시스템을 위한 애스펙트 모듈 설계
박세승(Seiseung Park),황희정(HeeJoung Hwang),최진탁(Jintak Choi) 한국산업응용수학회 2006 Journal of the Korean Society for Industrial and A Vol.10 No.2
현재 RFID 미들웨어의 표준은 RFID 표준을 주도하고 있는 EPCglobal의 ALE (Application Level Event) 이며 시스템 인프라스트럭처에 독립적으로 운영 될 수 있도록 최소한의 인터페이스와 확장점 만을 제시하고 있다. 그러나 확장점을 통한 기능의 확장에 대한 부분은 표준화 되어 있지 않으며 운영중에 있는 시스템에 적용하기 위해서는 새로운 코드를 추가 하거나 변경해야 하는 문제점이 있다. 본 논문에서는 이러한 문제점 해결을 위해 AOP(Aspect Oriented Programming) 기법을 도입한 동적 ALE 미들웨어 프레임워크를 제시하고 이를 구현하기 위한 애스펙트를 설계했다. 설계된 미들웨어 프레임워크 및 애스펙트는 동적인 기능의 확장을 제공해 기존 ALE 기반 미들웨어의 기능확장에 따르는 유지보수의 어려움을 해결하고 표준화된 방법으로 새로운 기능을 추가할 수 있다. The current RFID middleware standard is ALE (Application Level Event) of EPCglobal that takes the lead in RFID standardization. ALE suggests the minimal interface and extension points so that it can be operated independently from system infrastructure, and actual implementation is left to vendors. But there is no specific mention with regard to functional extension through extension points, and It is very hard to extend or modify the function on running system. To solve this problem, we suggest AOP (Aspect Oriented Programming)-based ALE middleware framework for developing RFID middleware. In addition, we designed aspect for RFID middleware for implementing and extending functions according to ALE rules and for the convenience of maintenance.
박세승(Sei Seung Park),김광진(Kwangjin Kim),고낙용(Nak Yong Ko),서동진(Dongjin Seo) 한국정보기술학회 2007 한국정보기술학회논문지 Vol.5 No.4
This paper proposes a method to reduce the pose error of dead reckoning for an indoor mobile robot. The dead reckoning method using only wheel encoder information can't avoid the error in localization due to mechanical error and control error such as slip, wheel diameter error, and uneven floor. To compensate for the pose error, the proposed method uses orientation information sensed by electronic compass. The heading angle from the electronic compass substitutes the dead reckoned heading angle, and is used to calibrate the dead reckoned position data. This method is tested and evaluated through simulation and experiments. This method keeps the pose error within some limit, while the pose error of dead reckoning accumulates and increases without limit as the robot moves.
주재한,박세승 조선대학교 전자정보통신연구소 1998 電子情報通信硏究所論文誌 Vol.1 No.1
In this paper, system parameters related to the receiver sensitivity, the single tone desensitization, and the intermodulation spurious of the J-STD-018 which is the PCS mobile station (MS) minimum performance were reviewed. And analysis showed that the intermodulation spurious and system performance due to variation of the noise figure, 3rd order intercept point and gain for the receiver components. The simulation shows the selectivity is -70.4dB at 1.25MHz frequency offset from the carrier frequency while the MS noise figure to satisfy J-STD-018 is 9dB and the input 3rd order intercept paint of the MS class Ⅰ and MS class Ⅱ-Ⅴ is -9.8dBm and -13.9dBm respectively. When the interference power level at the receiver is small, the receiver has better performance as we increase the gain of LNA. However, when the interference level at the receiver is large, the receiver performance is decreased by the effect of the spurious as we increase the gain of LNA. Thus, we proved the effectiveness of LNA On/Off switching technique as to reduce the effect of the spurious.