무제약으로 필기한 숫자 필드의 인식에 대한 연구

최순만,홍기천,오일석 대한전자공학회 1996 대한전자공학회 워크샵 Vol.1996 No.-

배전선 반송 데이타통신에서의 전원동기 위상대역한정 전송에 의한 주기적 노이즈신호 회피특성에 관한 연구

최순만,노창주 한국마린엔지니어링학회 1994 한국마린엔지니어링학회지 Vol.18 No.3

The location of periodic noises in phase of AC power wave reveals to be specific according to the noise kinds which can be generally classified into modulation and baseband types in DLC. The former noise type has constant noise phase which is originated from switching mode power supplies and the latter normally caused from thyristor circuit of low switching frequency is compared to be more dispersive than the other.

조정파라미터 공간에서의 제어계 동작점과 안정성에 관한 연구

최순만 한국마린엔지니어링학회 2000 한국마린엔지니어링학회지 Vol.24 No.4

The states of control loops in existing actual systems are changed according to time varying conditions of controllest process and other system components. Adjusting control parameters properly at site which is performed generally by Ziegler & Nichols mthod is important for safe and efficient operation, but the method may require much time to adjust and not easy to inexperienced engineers. This study is aimed to propose more handy method to adjust control parameters by plotting operating conditions on the space of adjusting parameters. One loop of model control system without perturbation condition has been adopted and its stability limit was plotted on the coordinates of Gain and Integral time which was acquired after analyzing Nyquist diagrams and time domain responses. The result showed that the sets of adjusting parameters according to critical stability and proper stability could be acquired reasonably through both responses and the curves on parameter space revealed available patterns for the purpose of easy maintenance of control characteristics.

인체의 구조 및 동작 학습을 위한 멀티미디어 CAI 소프트웨어 개발 및 교육 평가 : 오일석

최순만,박기복 全北大學校 敎育大學院 1995 敎育論叢 Vol.15 No.-

When we use computer in learning, computer may provide us with environment that existing teachers cannot give. That is computer learning plays a great part in increasing learning-efficiency in terms of inducing student's interests, possibility of immediate feedback and providing highly individuailized learning process. This paper mentions contents of Nature textbook for primary school using multimedia-based CAI software. Our system uses KAS as authoring tools, induce student's interest making good use of sound, graphics, animation provided by KAS and attempt to increase learning-efficiency. Learning contents consists of four parts, body structure, digestive organ, circulation organ, sensory organ. Also Our system selects and proposes problems randomly then can help self-evaluate learning-efficiency.

연속 필기 숫자 필드의 외곽선 기반 분할 및 인식

崔淳萬,吳一錫 全北大學校 1996 論文集 Vol.41 No.-

대부분의 양식에 나타나는 무제약 연속 필기 숫자의 인식은 문서 처리 자동화에 있어 대단히 중요하다. 본 논문은 양식에 나타나 있는 숫자 필드의 형태를 네가지로 분류하고, 이들 네가지 유형에 대한 숫자 필드 데이터베이스 구축에 대해서 기술하고 있다. 또한 두자 접촉 숫자 분할 알고리즘을 제안하고, 이 데이터베이스에서 추출한 패턴으로 훈련하고 테스트한 실험 결과를 제시하고 있다. 이 알고리즘은 입력 패턴외곽선의 상하 두 점을 쌍으로 하고 각 쌍에 분할 점수식을 적용하여 최고치를 갖는 쌍을 최종 분할 경로로 사용하였다. 분할 점수식에 사용하는 특징 함수는 두개의 낱자 인식기로 훈련하였다.

디젤발전기 원동기의 운전특성 시뮬레이션

최순만,오진석 한국마린엔지니어링학회 1997 한국마린엔지니어링학회지 Vol.21 No.2

The prime mover performance of on - board Diesel Generator is well characterized by the variation of frequency and the load sharing on parallel running under electric load change. This study is aimed to configure the modeling for performance simulation regarding to DG operation which could be interested for education purpose or system analysis. The modeling had been made on the base of modules such as govenor, prime mover of diesel engine and generator with electric load system, which were then intergrated for total simula¬tion performance. One real model system has been introduced for deciding relating parameters and for the comparison of resulting performance in simulation. The responses from the modelling were confirmed in single and paralell operation, the results of which showed resonable accordance with the real system.

조정파라미터 공간에서의 제어계 안정한계 특성

최순만 한국마린엔지니어링학회 2001 한국마린엔지니어링학회지 Vol.25 No.2

In this paper, a general one-loop control system was assumed as a model system which has a time-delay element connected with a first order-lag element in series. After the corresponding parameter set causing stability limit condition for the model system was obtained by mathematical procedures, their loci on the parameter space was taken according of frequency change,. The parameter set loci of stability limit showed a specific pattern, and particularly the curves on the Kp-Ti parameter space were able to generalized in the form of an exponential formula. These properties were also compared with the results taken from experimental procedures by Nyquist response method and Ziegler & Nichols method on the time domain, and both results were confirmed to be nearly same.

배전선반송 데이타통신에서의 주기적 임펄스노이즈의 발생특성

최순만,노창주 한국마린엔지니어링학회 1994 한국마린엔지니어링학회지 Vol.18 No.2

The existence of peroodic impulse noises in distribution line carrier (DLC) communication system is known to be the most serious obstacle for improving DLC communication quality in reliability and capacity. From the spectral points, impulse noises can be divided into baseband type and modulation type the noise width of whichs are much different each other. With each nose type, this study presents the basic characteristics in relation to what they originate from and how their spectrum properties are revealed. The baseband type impulse noise is normally caused from thyristor circuit running with low switching speed and the modulation type noise from the circuit of switching power supply. The base wave of modulation noise is shown to be the pulsuatic charging current to primary condenser in switching power circuit. The study result indicates also that placing the DLC carrier frequency away the band predominated by modulated noise especially from RCC type switching power circuit is very important in DLC design.

횡요상태 관측에 의한 선체 횡관성모멘트 값의 도출을 위한 일반식

최순만,Choi, Soon-Man 해양환경안전학회 2015 해양환경안전학회지 Vol.21 No.5

선체의 횡관성모멘트는 선박의 횡운동 특성을 다루는 경우 제외될 수 없는 요소로서 그 크기의 적정성은 선체 동특성 해석의 결과와 신뢰성에 큰 영향을 미친다. 그러나 선박은 질량분포와 형상이 복잡하므로 이를 직접적인 계산을 통해 값을 구하기에는 과정이 매우 복잡하고 대상 선박의 구체적인 관련 자료를 얻기도 어렵다는 점에서 실용적으로는 선체 질량의 등가적 관성반경을 선체폭의 일정비율로 계산하는 간접적인 방법이 통용되고 있다. 한편, 어느 선체의 자유 횡운동이 나타내는 횡요 주기와 감쇠형태는 관성모멘트에 의해 영향을 받기 마련이고 따라서 이러한 응답의 결과적인 모양으로부터 역으로 해당 선박의 관성모멘트를 구하는 일반식의 도출이 가능할 것으로 유추될 수 있다. 본 연구에서는 관찰에 의한 선체의 횡요 주기는 경사각의 진폭 감쇠비에 의해서도 달라지는 관계를 해석하여 횡요 주기와 경사각 진폭 감쇠비 모두를 함수 인자로 포함하는 일반식에 의해 횡관성모멘트 크기가 구해질 수 있음을 나타내었다. 또한 이러한 일반식에 횡요 관찰 선박의 주요 제원을 적용하였을 때 나타나는 특성 그래프들을 분석한 결과 횡요주기뿐 아니라 진폭감쇠비가 함께 검토될 때 얻어지는 관성모멘트 값이 보다 정확해진다는 것을 확인하였다. The transverse moment of inertia is an indispensable factor in analyzing the roll motion characteristics of ships and the calculating method needs to be based on the more reasonable theories when deciding the value as the results and reliability of analysis could be much affected by the correctness. However, the mass distribution and shape of hulls are quite complicated and give much difficulties in case of calculating the value directly from the ship design data, furthermore even acquiring the detailed design data for calculation is almost impossible. Therefore some simpler ways are practically adopted in the assumption that the gyradius of roll moment can be decided by a given ratio and hull width. It is well known that the responses of the free roll decay are varied according to the value of roll moment in view of roll period and amplitude decay ratio, so that the general formula to get the moment value can be derived also from the observation of roll decay responses. This study presents how the roll period and decay ratio are interrelated each other from the roll motion characteristics with suggesting a general formula to be able to calculate roll moment from it. Finally, the obtained general formula has been applied to a ship data to check the resultant characteristics through analyzing graphs and showed that the roll moment becomes more accurate when rolling period and decay ratio are considered together in calculation.

조정파라미터 공간에서의 제어계 안정한계 특성

최순만 한국마린엔지니어링학회 2000 한국마린엔지니어링학회 학술대회 논문집 Vol.2000 No.-