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Nelder-Mead, Dennis-Woods Method와 MATLAB의 FMINS의 비교실험
최영일,현창헌,Choe, Yeong-Il,Hyun, Chang-Hun 강원대학교 산업기술연구소 1999 産業技術硏究 Vol.19 No.-
The Nelder-Mead simplex algorithm has become on of the most widely used methods for nonlinear unconstrained optimization, since 1965. Recently, this algorithm has been reevaluated and many papers on this algorithm are being published. The MATLAB computer software, highly renown in engineering, also provides the Nelder-Mead algorithm and the Denis-Woods modification with FMINS function. The authors made C++ code of these algorithms and compared with FMINS on the convergence behavior and the exactness of solutions. It shows that MATLAB's FMINS is inferior to author's C++ code. So, FMINS should be corrected for every user.
최영일,박유미,이병선,김상하,Choe, Yeong-Il,Park, Yu-Mi,Lee, Byeong-Seon,Kim, Sang-Ha 한국통신학회 2007 정보와 통신 Vol.24 No.7
컨버전스 시대의 도래는 개인화 된 다양한 서비스의 개발에 대한 새로운 패러다임을 요구하고 있다. 통신 분야에서도 융합 서비스에 대한 관심이 고조되고 있으며, 통신 서비스와 IT 응용과의 융합을 위한 준비가 Telecom 2.0 이라는 패러다임으로 진행되고 있다. 본 고에서는 Telecom 2.0을 향한 차세대 통신 서비스 융합을 위한 플랫폼으로서 개발 및 연구가 진행되고 있는 개방형 서비스 플랫폼 및 개인화 서비스 플랫폼 기술 동향에 대하여 살펴 본다.
류마토이드 관절염과 연관된 이차성 신유전분증에서의 반월상 사구체 신염
최정현 ( Choe Jeong Hyeon ),임병국 ( Im Byeong Gug ),최준혁 ( Choe Jun Hyeog ),조현경 ( Jo Hyeon Gyeong ),최영일 ( Choe Yeong Il ),김흥수 ( Kim Heung Su ),신규태 ( Sin Gyu Tae ),김도헌 ( Kim Do Heon ),한재호 ( Han Jae Ho ) 대한신장학회 2001 Kidney Research and Clinical Practice Vol.20 No.6
A case of renal amyloidosis with crescentic glomerulonephritis associated with rheumatoid arthritis is described. A 60-year-old female with 15 years` history of rheumatoid arthritis developed nephrotic syndrome followed by rapid deterioration of renal function. Glomerular amyloid deposition and sclerotic change was present in kidney biopsy specimen and crescentic change was found in 85% of the glomerulus. Electron microscopic finding of glomerulus showed randomly oriented, rigid-appearing, long nonbranching fibrils. The patient was treated with intravenous high-dose methylprednisolone pulses combined with intravenous cyclophosphamide followed by oral corticosteroids. Three months after the above treatment, renal function gradually improved, reaching serum creatinine level to 2.5 mg/dL. But the nephrotic range proteinuria persisted.
현창헌(Hyun Chang Hun),최영일(Choe Yeong Il) 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.1
There are many optimal design packages, but they are big ones and they have only a few kinds of optimal algorithm coded with Fortran and it is sometimes necessary for user to write down some codes into their packages. So it is hard for user to learn how to use and customize them. More over, there are no commercial home-made software for optimum design. So, in this paper, several famous optimum algorithms are coded and modulized with C++ which is known as a suitable computer language in order to build up more algorithms into one computer software. All algorithms developed with C++ here were tested for comparison with optimization tool box of MATLAB and are superior to MATLAB.