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류명춘 경운대학교 산업기술연구소 1999 産業技術硏究論文誌 Vol.2 No.1
Efficient methods exist for discovering rules from large collections of data. The number of discovered rules can, however, be so large that browsing the rule set and finding interesting rules from it can be quite difficult for the user. In this paper, the method to manage the discovered rules using the rule network is proposed.
류명춘,이훈재,서동주 경운대학교 산업기술연구소 1998 産業技術硏究論文誌 Vol.1 No.1(A)
The number of databases maintained in the world is increasing rapidly. Many of these databases are huge and are therefore very difficult to manually analyze. To make it feasible to analyze databases, researchers have been developing tools for knowledge discovery in databases. This paper proposed the knowledge discovery system based on rule-based system to efficiently discover knowledge in databases.
3차원 오브젝트의 隱線除去를 위한 竝列處理技法의 提案 및 口現
柳明春,徐熙敦 嶺南大學校 工業技術硏究所 1991 연구보고 Vol.19 No.1
It is difficult to remove hidden lines or hidden surfaces using conventional algorithms when the shape of the object is complex or real time processing is required. In this paper, we proposed a parallel processing method to reduce the time needed in removing hidden lines of 3-dimensional objects, and implemented it using C language. The parallel processing system to estimate the efficiency of the proposed method is composed of 4 sets of IBM PC/XT(4.77MHz) and a shared memory which is shared by 4 sets of PC. And we constructed system control function libraries using assembly language and C language. The result shows that the speed-up factor of 3.8 times for one data and 3.5 times for the other data was gained accordance with the experiments.
규칙기반 시스템과 데이터베이스 관리 시스템의 통합 기법에 관한 연구
류명춘,정영석,오주환 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(B)
It is useful of the integration of rule systems into DBMS. Because rule-based system supports a eminent inference and analysis power and relational DBMS manages efficiently large data supporting consistency and independency. In this paper, we compares and analyzes the three approach for the integration of rule system into DBMS. Also we design inference system for rule-based database system.
류명춘 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(C)
21세기 우리에게 편리함을 안겨준 인터넷에서 새로운 기업 마케팅과 마케팅시 발생하는 경품을 네티즌이보다 쉽게 혜택을 받을 수 있도록 도와주는 경품 검색홈페이지가 많이 등장하고 있다. 본 논문에서는 경품 검색홈페이지에 관한 기술적인 요소와 (ASP : Ative Sever Page, Agent System) 기존 검색홈페이지와 본 논문에서 제시하는 경품검색 홈페이지와의 차이점을 비교 분석하여 앞으로 발전 가능한 부분과 경품검색 홈페이지를 구축해 가는 과정을 기술하였다.
류명춘,정영석 경운대학교 산업기술연구소 2000 産業技術硏究論文誌 Vol.3 No.1(A)
According to the rapid development of internet and communication technologies, internet services, as electronic commerce and information retrieval, have been developed. This paper presents a design model of a intelligent negotiation agent system to accept a buyer's requirements on internet.
류명춘 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(C)
인터넷 사용자가 증가하고 있으며, 이에 따라 인터넷 서비스의 숫자도 증가하고 있다. 한명의 사용자가 다중의 서비스를 사용하고 있으며, 너무 많은 사이트에 가입 하다보니 아이디와 패스워드를 관리하는데 불편함이 있다. 이에 편리하고 쉽게 한번의 아이디와 패스워드의 입력만으로 모든 아이디와 패스워드를 관리해 주는 홈페이지를 구현했다. 이 서비스만 가지고 모든 사이트의 게이트 역할을 할 순 없지만, 앞으로 좀더 쉽게 인터넷을 이용하고자 하는 네티즌에게 없어서는 안될 서비스가 될 것이다.
사용자 이동 패턴을 이용한 예측적 무선 대역폭 예약 기법
정영석,류명춘 경운대학교 산업기술연구소 2002 産業技術硏究論文誌 Vol.5 No.1(B)
For multimedia traffics to be supported successfully in wireless network environment, it is necessary to provide Quality-of-Service(QoS) guarantees among mobile hosts(clients). In order to guarantee the QoS, we have to keep the call blocking probability below a target value during hand-off session. However, the QoS negotiated between the client and the network may not be guaranteed due to lack of available channels for traffic of a new cell, since on service mobile clients should be able to continue their sessions. In this paper, we propose an efficient load-balancing algorithm based on the adaptive bandwidth reservation scheme for enlarging available channels in a cell. Proposed algorithm predicts the direction of clients in a cell and adjusts the amount of the channel to be reserved according to the load status of the cell. This method is used to reserve a part of bandwidths of a cell for hand-off calls to its adjacent cells and this reserved bandwidth can be used for hand-off call prior to new connection requests. If the number of free channels is also under a low threshold value, our scheme use a load-balancing algorithm with an adaptive bandwidth reservation. In order to evaluate the performance of our algorithm, we measure metrics such as the blocking probability of new calls and dropping probability of hand-off calls, and compare with those of existing schemes.
이훈재,류명춘,오주환 경운대학교 산업기술연구소 1998 産業技術硏究論文誌 Vol.1 No.1(A)
In this paper we propose a secure T1-rate digital image conference system which consists a stream cipher of 7-bit real adder with 2 bit carrys and a fast and stable 2-step full-duplex synchronization. And we analyze the cipher algorithm and the synchronization performance of the system.
CDMA 셀룰러 시스템에서의 호 탈락율 개선을 위한 향상된 핸드오프 호 제어 기법
정영석,류명춘 경운대학교 산업기술연구소 2000 産業技術硏究論文誌 Vol.3 No.1(B)
In this paper, we propose a enhanced handoff call control scheme(EHCCS) for reducing call blocking rate in CDMA cellular systems. Since two or three traffic channels are assigned to a mobile station(MS) during handoff period, the utilizations efficiency of traffic channels decreases. In DCMA cellular systems, a MS requests a soft handoff to a neighbor base station(BS) whenever the received pilot strength from the neighbor BS exceeds the predetermined handoff threshold, even though the MS is not actually approaching the neighbor BS. In this case, there exists unnecessary soft handoff call requested by a MS moving away from the neighbor BS. In the proposed scheme, a neighbor base station ignores unnecessary soft handoff calls requested by MS which are not actually approaching the neighbor BS. The performance of the proposed scheme is evaluated by computer simulation. The results show that the call blocking rate for new calls and handoff calls is reduced.