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方大旭 啓明大學校 産業技術硏究所 1990 産業技術硏究所 論文報告集 Vol.12 No.-
This is a survey of functional languages that have been recently expanded and parallel reduction computers that are designed and implemented currently. Computational models, interconnection networks, task management, and memory management are down for discussion. Also we review reduction computers that have been studied or is studying and discuss the prospect for a future research of parallel reduction computers.
다중 위상 처리구조를 갖는 온실 복합환경제어 알고리즘 설계
방대욱 서비스사이언스학회 2021 서비스연구 Vol.11 No.2
본 연구는 온실환경의 변화 정도에 따라 환경제어 구동기를 조합하고 제어할 수 있게 하는 다중 위상 처리구조를 갖는 온실 복합환경제어 알고리즘을 설계하고 검증한다. 복합환경제어 시스템은 온실 내외부에 설치된 센서들이 감지한 정보를 복합환경제어기가 분석하여 작물 생육 환경이 유지되도록 각종 구동기를 복합적으로 작동시키는 시스템이다. 복합환경제어기는 복합환경제어 알고리즘으로 제어를 지시하는데, 복합환경제어 알고리즘은 측정장치의 입력값, 구동장치의상태값, 초기 설정값 등으로 구동기 제어장치 운영에 필요한 결과값을 산출한다. 기존의 알고리즘들은 대부분 반복주기별로 구동기 제어장치들의 제어절차를 단일 위상에서 수행하는데, 산출값의 오차로 인해 온실환경에 이상변화를 일으킬 수있다. 제안한 알고리즘은 환경통제, 환경조절, 장치운영이라는 다중 위상에 제어절차를 분산하였다. 즉 매 반복주기 마다먼저 환경통제 위상에서 환경변화를 감지하고, 다음으로 환경조절 위상에서 해당 환경을 조절할 수 있는 구동기 제어장치들을 조합하며, 마지막으로 장치운영 위상에서 구동기 제어장치가 제어하는데 필요한 제어값을 산출한다. 제안한 알고리즘은 온실 환경요소와 구동기 제어장치 간의 관계를 분석한 결과를 기반으로 하여 설계되었다. 검증 분석에 의하면, 다중 위상 처리구조는 구동기 제어장치의 설정값을 수정 또는 보완할 수 있는 여지를 제공하고, 관련된 환경요소의 변화를한꺼번에 반영한 구동기 제어장치의 운영을 가능하게 한다. 또한 이 구조는 기존 조건 기반 복합환경제어 알고리즘 개선에 적용할 수 있어서 최적 온실환경 조성을 목표로 하는 복합환경제어 시스템의 개발에 기여할 것이다.
方大旭 金烏工科大學校 1982 論文集 Vol.3 No.-
Computer aided designs for modelling the geometry of three-dimensional objects are current issues because they are required in design analysis and in manufacturing. In this paper, we implement an algorithm which discovers all objects with a given wire frame. Constructions of data structures for implementing the above algorithm are interest in CAD/CAM areas, also will be valuable applications in computer graphics.
방대욱 啓明大學校 産業技術硏究所 1998 産業技術硏究所 論文報告集 Vol.21 No.2
A mobile agent is a computer program that acts autonomously on behalf of person or organization and that has the unique ability to transport itself from one system in a network to another. An agent system is a platform that can create, interpret, execute, transfer and terminate agents. The well-know agent systems such as Aglets, Odyssey, More, Voyager, Concordia, and Agent-Tcl differ from each other and then can't be interoperable, although the MAF, a collection of definitions and interoperable interfaces for mobile agent systems, was announced in 1997. In this paper, we propose an execution model that can execute mobile agents within an agent system and migrate them to remote agent system as conforming MAF, and design the structure and functions of its agent system. Our model uses Java and CORBA ORB in its the implementation and exploits their characteristics appropriately. Specifically its agents besides its clients can spawn child agents and control other agents.
方大旭 啓明大學校 産業技術硏究所 1989 産業技術硏究所 論文報告集 Vol.11 No.-
This paper examines a kernel-implemented LWP mechanism which can be used to provide support for MINIX kernel development and user applications programs. As part of our investigation, we have described the contents of the LWP and its environment, and explained the required primitives which are added or modified.
方大旭 啓明大學校 産業技術硏究所 1987 産業技術硏究所 論文報告集 Vol.9 No.-
Both Pascal and C programming languages are known as the widely-used, efficient and powerful programming languages. It may be valuable to convert a program of one programming language to the equivalent one of the other. In this paper, an implementation method of the interpreter to convert a Pascal program to the equivalent C program are discussed. Specifically, implementation process, problem and their solutions using Lex and Yacc as software tools under the UNIX operating system are dealt.
方大旭 金烏工科大學校 1984 論文集 Vol.5 No.-
In this paper, we construct the library total system using DBMS(Data Base Management System) and design a data base for the computerized college library affairs. Also DB/DBMS query language is discussed for information retrieval and management. In order to define a network data model for the computerization of the college library affairs, its set type record type and data item are discussed. Retieval, storage, updating operations and the procedure of its management are down for the description of its query language.
學事行政 電算化를 위한 Data Base의 設計 및 具現
方大旭 金烏工科大學校 1983 論文集 Vol.4 No.-
This paper is addressed to the problems of a database design for computerized college affairs and of its storage structure. Also its query language has been discussed for information retrieval and management. A hierarchical data model for computerized college affairs is introduced which consists of five data structures. From this hierarchical model. its implementation is shown to be the most desirable database system for computerized college affairs in the Kum-Oh Institute of Technology