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寄生容量을 考濾한 스위치 케퍼시터濾波器의 設計에 관한 硏究
田龜濟,邊健植 동아대학교 공과대학 부설 한국자원개발연구소 1984 硏究報告 Vol.8 No.1
In this paper, the fundamental theory of switch capacitor filter is explained and the effect of parasitic capacitance is discussed in more detail. New equivalent circuits accounting for this parasitic effect are given. The relation between RC active filter and SC filter considering parasitic capacitances are presented by experiment. After all, it is concluded that error can be reduced significantly when we make these filters of MOS IC technology which has better temperature and linear characteristics.
超音速流(M∞=4.5)속에 놓인 Wedge 周邊의 密度分布
李鍾憲,田龜濟 東亞大學校 1966 東亞論叢 Vol.3 No.-
本 硏究는 擴散型衝擊波管(Divergent Shock tube)에 依해서 만들어진 超音速流(M∞=4.5, R∞=1.1×??/cm) 속에 놓인 平面 Wedge 周邊의 密度分布를 Mach-Zehender 干涉計를 使用하여 Magnesium 擊發光源(4481Å)에 依한 干涉무늬를 寫眞으로 瞬間撮影하여 決定하는 것이다. Density distribution of the Supersonic flow past a plane wedge was determined by an optical method. Raynolds number of the Uniform flow which is generated by the shock tube is R∞=1.1×?? per centimeter and the Mach number is M∞=4.5. As an optical method the Mach-Zehender Interferometer was used mainly and the wave length of the light source is 4481Å utilizing the magnesium spark.
Optimizing PASCAL Compiler를 위한 P-code의 축소방법
張德成,田龜濟 東亞大學校 大學院 1984 大學院論文集 Vol.8 No.2
We have studied the methods of produce P-code, the intermediate code of PASCAL compiler, for the portable compiler and optimize these code. In this paper, we explain the concepts of pseudo machine and P-code. And then we show the optimizing table to use for processing the constant folding, redundant code remove and operator reduction etc. Using these tables we can manage peephole optimization easily. The optimized P-code is interpreted on the target machine.
Mach-Zehnder 干涉計에 依한 超音速 氣流의 光學的 測定法
尹在鳳,田龜濟 東亞大學校 1963 東亞論叢 Vol.1 No.-
The experiments using divergent shock tube are made the flows around a wedge, and attained the following qualitative results by means of the Mach-Zehnder inter-ferometer and schlieren method. The wedge is mounted Parallel to the direction of uniform flow. and all the experiments were carried out with the wedge(angle 30°, width 30mm, thickness 15 mm). 1. Mach number(test section):4.6 2. The shock wave is adhered to the top of wedge. 3. The flow in test section is almost uniform flow 4. The pressure distribution is higher in the inclined plane of the wedge, and the changes is distinct around the shock wave.
田龜濟,愼瑋縡 慶南大學校 附設 工業技術硏究所 1988 硏究論文集 Vol.6 No.-
本 論文에서는 본드그래프 모델을 利用해서 전달함수를 유도 하였다. 본드그래프는 시스템을 모델화하는 도식적인 방법으로서 시스템의 실제 구성요소들은 하나 또는 그 이상의 이상화(理想化)된 set들에 의해서 모델화 되며, 실제 시스템에서 취급하는 에너지와 파워(power)에 관계된다. 본 논문에서 電氣回路網은 본드그래프에 의해 모델화되고 다시 쟈이로 본드 그래프(Gyrobond Graph)로 변환 시킨다음 포인트그래프(point graph)를 자이로본드그래프에 일치시켰다. 또한, Gyroadjacency 행렬과 레지스턴스(resistance)와 인덕턴스(Inductance)의 대각행렬(Diagonal matrix)에 의해 상태행렬(state matrix)이 구해져서 그 상태행렬에 의해 回路網의 傳達函數를 유도하였다. This paper is discussed with respect to derivation of transfer fuction using Bond Graph model. Bond Graphs is pictorial modeling method of system. Each real component of the system is modeled by one or more element of an idealized set that are associated with energy and power handling real system. In this paper electrical network is modeled by bond graph and transformed in gyrobondgraphs. Then the result is corresponded to pointgraph. State matrix derivated in terms of gyroadjacency matrix and diagonal matrices of the resistance and the inductances. Transfer function obtained from the state matrix.
田龜濟,洪昌熹 東亞大學校 1972 東亞論叢 Vol.9 No.-
When we try to get the dielctric constants of high polymer amaterials at lowest frequency or D.C, we have had only poor calculating methods according to HAMON or TOYODA. They calculated the dielectric permittivity from approaching functions such as t? or ???. But owing to the distribution property of relaxation times their calculating values are permited a great error. Thus in this paper we worked out a new way to calculatd exactly from relaxation curve which we got experimentaly. As a result we observed directly the dielectric phenomena at lowest frequency about ????heltz under 1% errors.
FDNC 및 FDNR을 이용(利用)한 대역통과려파기(帶域通過濾波器)의 구성(構成)에 관한 연구(硏究)
전구제 ( Gu Jai Chun ),김명기 ( Myung Ki Kim ),김두영 ( Doo Young Kim ) 東亞大學校附設 石堂傳統文化硏究院 1979 石堂論叢 Vol.3 No.-
When the FDNC method is applied to the BP network of ladder type, floating FDNC which is not directly realized by using the Antoniou`s GIC is appeared, In this paper, a method to solve such a problem is proposed. A part of DCR network transformed from a passive BP filter of ladder type is a T type, of FDNC`s and a resistor. This T type is realized by 2 GIC`s and a grounded FDNR. The design procedure of 8th order Butterworth filter using such a method is discussed, and experimental result is coincident with the theoretical one.
학사업무(學事業務)의 전산화(電算化)에 관한 연구(硏究) -동아대학교(東亞大學校)를 중심(中心)으로-
전구제 ( Koo Chae Chun ),이상완 ( Sang Wan Lee ) 東亞大學校附設 石堂傳統文化硏究院 1982 石堂論叢 Vol.6 No.-
In this study, a Student Information System by a EDP System is newly organized based on Dong-A University. That is, a Student Register System, a Lecture System, and a Studen Record System in developed. A Mantagement Information System for University will be constructed by a basis of this study.
李鍾憲,田龜濟,金斗泳 동아대학교 공과대학 부설 한국자원개발연구소 1981 硏究報告 Vol.5 No.2
Digital Controlled Variable Conductance(DCVC) whose conductance is varied by binary input is constructed with IC analog switch and Digital Controlled variable Duty-ratio Generator(DCVDG). Applying this DCVC to the wave active filter, digital controlled variable active filter is constructed. Experimental results of 5th Chebyshev LPF and 4th Butterworth BPF are agreed well with theoretical ones.
尹在鳳,田龜濟,李鍾憲,洪鎭泰 東亞大學校 1974 東亞論叢 Vol.11 No.2
The aim of this to calculate the thermal efficiency of heat absorbing apparatus by comparatively studing a relationship between the experimental results and the calculated values obtained after the ideal formular for absorption heat are derved, when solar heat is absorbed to the circulation-type heat absorbing plate. The thermal efficiency obtained from the experiment was found to be about 14 to percent. It was also shown that as the appartus used was placed in the east, there was a tendency that the absorbing plate facing the west was more effective in terms of thermal efficiency.