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김대열,한영출,조재명,김양술,주신혁,박병완 한국공작기계학회 2003 한국공작기계학회 추계학술대회논문집 Vol.2003 No.-
An experimental study presents characteristics of combustion in a combustion chamber by port deactivation valve for economy and emissions standards. In order to use combustion properties data, it is necessary to build some data base, which use cylinder pressure sensor, etc. Port deactivation valve has been developed to satisfy requirement of achieving sufficient swirl generation to improve the combustion. A feasibility and necessity of combustion pressure based cylinder spark timing control has been examined. So, this was obtained the Coefficient of Variation(COV) and the mass-burned(MFB). The characteristics of pressure ratio fraction is similar to that of mass-burned fraction. Using the results of the test, the effects of the combustion chamber can be improved combustion stability by port deactivation.
Diethyl 1-chloro-2-phenyl-2-(tosyl) aminoethylphosphonate 의 결정 및 분자구조
김대영,이재혁,신준철,김문집 순천향대학교 기초과학연구소 1997 순천향자연과학연구 논문집 Vol.3 No.1
The crystal and molecular structure of diethyl 1-chloro-2-phenyl-2-(tosyl)aminoethyl phosphonate has been determined from single crystal X-ray diffraction study ; C19H25NO5PCIS, Monoclinic, P2₁/a, a=10.8507(11)Å, b=16.1201(12)Å, c=12.7354(12)Å, β=90.192(7)°, V=2227.6(3)ų, T=293(2)K, Z=4, Cuk α(λ=1.54178Å). The structure was solved by direct method and refined by full-matrix least squares to a final R=5.17% for 2444 unique observed F0> 4σ(F0) reflections and 254 parameters.
李相玩,申大赫,兪炳哲 동아대학교 공과대학 부설 한국자원개발연구소 1990 硏究報告 Vol.14 No.1
This paper deal with the concept of AS/RS and the closest available location is AS/RS. Travel-time model and minimum cost model have developed for automated storage/retrieval machine. In this article, it is shown that arrival loads follow Poisson process and duration times are independent of each other and have i. i. d. distribution. The objective of this study is mainly compare with existing research and propose new approach method to optimal location. We give approximate method for the K closest location.
企業 附設 硏究所 活動實態에 관한 硏究 : 釜山·慶南地域을 中心으로
河正鎭,黃圭完,申大赫,兪炳哲 동아대학교 공과대학 부설 한국자원개발연구소 1990 硏究報告 Vol.14 No.2
The research institute of an enterprise attaches have been enlarged in korea. This study grasps the status and the research activity in the research institute of an enterprise attached in the Pusan and Kyungnam. So, we find the important role in the research institute of a enterprise attached.
李相道,兪炳哲,申大赫 동아대학교 공과대학 부설 한국자원개발연구소 1989 硏究報告 Vol.13 No.2
Decision making problem is the process of selecting a possible course of action from all the available alternatives. Recently, the above problem has been considerable interest in the treatment of multiple objective in the decision making process. This paper deals with an interactive method for solving the multiple objective mathematical programming. The interactive multiple objective decision making depend on the progressive definition of the decision maker's preferences among with the exploration of the criterion space. An interactive algorithm which is efficient and useful to assist a decision maker in finding his most preferred efficient solution to the multiple objective mathematical programming is presented. To compare several technique with regard to criteria and an illustration of numerical example is included.
설정훈,이정희,이종현,권대혁,신장규 경북대학교 센서기술연구소 1995 센서技術學術大會論文集 Vol.6 No.1
A porous silicon-based photodiode has been fabricated by selective anodization of Si wafer and deposition of ITO(Indium Tin Oxide) as a transparent electrode. PECVD silicon nitride was deposited for the passivation of the device. The fabricated photodiode shows a very high photo-responsivity of 0.73A/W at 800nm wave length and a rise time of about 8ns at 100Ω load resistance. In order to find out the electrical conduction mechanism in the photodiode, metal/porous silicon Schottky diodes have also been fabricated. Their I-V characteristics are similar to those of p-i-n diodes and amorphous silicon diodes, unlike those of conventional Schottky diodes.