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시범주택 전원용 조선대 기숙사 50kW 태양광발전시스템의 운전특성
박정민(J.M.Park),김기범(K.B.Kim),이강연(K.Y.Lee),서진연(J.Y.Seo),조금배(G.B. Cho),백형래(H.N. Baek) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
This paper presents experimental operation with utility invertactive 50kW photovoltaic generation system.<br/> And that describe configuration of utility interactive photovoltaic system which power supply for dormitory.<br/> The status of photovoltiaic generation system components and interconnection and safety equipment will be summarized.<br/> This paper discusses property operation state which system endure division of power for dormitory
정삼용(S.Y.Jeong),이진섭(J.S.Lee),서진연(J.Y.Seo),김동휘(D.H.Kim),최연옥(Y.O.Choi),조금배(G.B.Cho) 전력전자학회 1998 전력전자학술대회 논문집 Vol.- No.-
Indirect vector control for induction motors requires the use of observers for estimation or observation of rotor flux magnitude and position In this paper, authors describe the induction motor vector control and introduce a nonlinear observer, named ELO(extended Luenberger Observer), without simulation results as a preliminary work for trial application Normally, design of nonlinear observer need coordinate transformation and linearzation through solving the partial different equation However, ELO requires minimal solution of nonlinear partial differential equation Simulation was performed by under the evironment of Matlab and Simulink without the proposed observer because we are still working Simulation was performed with conventional flux observer, a dc-ac inverter modulated by SVPWM technique, a vector controller armed with multiple PI controllers.<br/> <br/>
정남인(N.I. Jeong),최연옥(Y.O. Choi),김동휘(D.H. Kim),서진연(J.Y. Seo),조금배(G.B. Cho),백형래(H.L. Baek) 전력전자학회 2007 전력전자학술대회 논문집 Vol.- No.-
This paper presents experimental operation with utility interactive 50㎾ photovoltaic generation system. And that describe configuration of utility interactive photovoltaic system which power supply for dormitory. The status of photovoltaic generation system components and interconnection and safety equipment will be summarized. This paper try analyzing the operating characteristic according to secular variation of a 50㎾ photovoltaic system
CNN Mobile Net 기반 악성코드 탐지 모델에서의 학습 데이터 크기와 검출 정확도의 상관관계 분석
최동준,이재우 한국융합보안학회 2020 융합보안 논문지 Vol.20 No.3
At the present stage of the fourth industrial revolution, machine learning and artificial intelligence technologies are rapidly developing, and there is a movement to apply machine learning technology in the security field. Malicious code, including new and transformed, generates an average of 390,000 a day worldwide. Statistics show that security companies ignore or miss 31 percent of alarms. As many malicious codes are generated, it is becoming difficult for humans to detect all malicious codes. As a result, research on the detection of malware and network intrusion events through machine learning is being actively conducted in academia and industry. In international conferences and journals, research on security data analysis using deep learning, a field of machine learning, is presented. have. However, these papers focus on detection accuracy and modify several parameters to improve detection accuracy but do not consider the ratio of dataset. Therefore, this paper aims to reduce the cost and resources of many machine learning research by finding the ratio of dataset that can derive the highest detection accuracy in CNN Mobile net-based malware detection model. 현재 4차 산업혁명을 맞이하여 머신러닝과 인공지능 기술이 급속도로 발전하고 있으며 보안 분야에서도 머신러닝 기술을 응용하려는 움직임이 있다. 많은 악성코드가 생성됨에 따라 사람의 힘으로는 모든 악성코드를 탐지하기 어려워지고 있기 때문이다. 이에 따라 학계와 산업계에서는 머신러닝을 통해 악성코드나 네트워크 침입 이벤트를 탐지하는 것에 관한 연구가 활발히 진행되고 있으며 국제 학회와 저널에서는 머신러닝의 한 분야인 딥러닝을 이용한 보안데이터 분석 연구가 논문 발표되고 있다. 그러나 해당 논문들은 검출 정확도에 초점이 맞추어져 있고 검출 정확도를 높이기 위해 여러 파라미터들을 수정하지만 Dataset의 개수를 고려하지 않고 있다. 따라서 본 논문에서는 CNN Mobile net 기반 악성코드 탐지 모델에서 가장 높은 검출 정확도를 도출할 수 있는 Dataset의 개수을 찾아내어 많은 머신러닝 연구 진행에 비용과 리소스를 줄이고자 한다.
정병호(B.H.CHUNG),최문한(M.H.CHOI),조금배(G.B.CHO),백형래(H.L.BAEK),서진연(J.Y.SEO),김대곤(D.G.KIM) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
To use the SLIM for servo system, the exact account of thrust about the initial speed is needed, but analyzing by equivalent circuit analyzing methode such as rotary induction motor, the error occurs because of the end effect. So, we applied the equivalent circuit considering the end effect of SLIM in this paper. The current control system is advanced the space vector pulse width modulation by using high arithmetic performance microprocessor such as DSP. In this paper, we use the dynamic characteristic analyzing methode that can calculate efficiently the end effect by using equivalent circuit methode in the operating SLIM system modeling and examine the output characteristics of SVPWM with PI controller.