시변 지연시간을 갖는 시스템을 고려한 적응 PID제어에 관한연구

金漢雄,尹泰源 안성산업대학교 1991 論文集 Vol.23 No.-

In this paper we Propose a Adaptive PID controller for unknown systems with time-varying delay. Unknowen systems parameters are estimated using recursive least square methed, and controller design procedure extended multi-step time delay case using pole-assigment menthod. Since the order of the estimation vetor is not increased, the persistant exciting condition of control input is alleviated. Computer simulation is performed to illustrate the efficiency of the proposed method.

인산 칼슘을 사용한 수산화아파타이트 시멘트의 응결·경화 특성에 관한 연구

김한엽,박찬근,송태웅 경남대학교 신소재연구소 1996 論文集 Vol.6 No.-

습식법이나 수열법으로 합성한 hydroxyapatite(HAp)의 분말을 성형, 열처리한 소결체는 지금까지 알려진 바이오 세라믹스 중 생체친화성이 가장 우수한 것으로 입증되고 있으나 소결에 따르는 제조상의 몇가지 문제점을 안고 있다. 본 연구에서는 소결에 의하지 않고 tetracalcium phosphate(TTCP)분말과 dicalcium phosphate dihydrate(DCPD) 분말의 혼합물로 만든 paste를 용해·침전반응으로 응결·경화시켜 직접 HAp 경화체를 얻고, 이때 몇가지 변수가 HAp의 생성과 응결 및 경화특성에 미치는 영향을 검토하였다. TTCP와 DCPD로 조합한 시멘트의 수화반응생성물은 HAp 경화체였으며 이의 미소결정의 interlocking에 의해 응결·경화 하였다. 반응온도 및 HAp 종자의 첨가는 주로 초기단계의 반응속도에 영향을 주었다. 50℃에서의 HAp 생성 반응은 24시간 이내에 거의 완료되었다. Hydroxyapatite ceramics, one of the excellent biocompatible materials, are usually prepared by sintering of hydroxyapatite powders from wet chemical methods. But some problems caused by sintering process are still remained. In this study, instead of powder sintering methods. hardened bodies of hydroxyapatite were prepared by self-hardening reaction of cement paste composed of powdered tetracalcium phosphate(TTCP) and dicalcium phosphate dihydrate(DCPD). Some effects of seeding, reaction temperature on setting and hardening properties were investigated . The hydration products of the hardened paste were composed of finely-crystallized hydroxyapatite which causes setting and hardening by interlocking themselves. Self setting and hardening reaction are accelerated by elevating reaction temperature and addition of hydroxyapatite powders as a seeding materials. The hydration reaction of the paste. at 50C. was nearly finished within 24 hours after mixing with water.

An Analysis of means-end chain approach for birdwatching experts using soft laddering

Kim,Seong Seop,Park Chung Woong,Han,Hag Chin 세계문화관광학회 2007 Conference Proceedings Vol.8 No.0

1 패스 영역 라벨링 알고리즘

金漢雄,金炳天 안성산업대학교 1990 論文集 Vol.22 No.-

입력영상에서 특정 물체를 인식하기 위해서는 영상을 분할한 후, 분할된 각각의 영역마다 서로 다른 라벨값을 할당하고, 고유의 라벨값이 할당된 각 영역의 특성을 구하여 물체를 인식한다. 본 논문에서는 기존의 2-패스 라벨링 알고리즘(2-pass labelling algorithm) 보다 빠르고 기억장소의 낭비가 적은 1-패스 라벨링 알고리즘을 제안한다. 이 알고리즘은 서로 다른 라벨값을 가지고 있는 동일 영역에 대해서 부분적인 백트랙킹(backtracking)을 수행하여 같은 라벨값을 할당하고 있다. 끝으로 제안된 알고리즘의 성능을 평가하기 위하여 기존의 2-패스 라벨링 알고리즘과 제안된 알고리즘의 수행시간 및 기억장소 사용량을 비교분석한다.

茂朱 南大川 上流水系 汚染이 本流의 水質에 미치는 影響에 關한 硏究

金煥基,崔頭炯,韓雄在 全北大學校 附設 都市및環境硏究所 1996 都市 및 環境硏究 Vol.11 No.1

This study was investigated for the pollution load of water quality in the basin of Wondangchon. Total pollution load was measured that BOD was 683.6 ㎏/day, SS was 1,436.184 ㎏/day, T-N was 237.244 ㎏/day, and T-P was 62.078 ㎏/day respectively inthere. Furthermore, it was estimated that BOD is 1,056.863 ㎏/day, SS is 1,840.657 ㎏/day, T-N is 299,922 ㎏/day, and T-P is 74.154 ㎏/day respectively in 2006 year. In case of BOD loading, that by population accounted for 63% of all BOD loading of that, 57% was discharged in M-4 drainage area. However, since tourists have been increasing gradually, that by population was estimated to be analogous to that by tourists in 2006 year. In case of SS loading, that by livestock was bigger than that by population by holding for 49% of all SS loading, and that by tourists was 9.8% now, however, ratio of that by tourists was estimated to be increased up to 25.8% in 2006 year. In case of T-N loading, that from wastewater treatment plant located in M-1 drainage area was the biggest by accounting for 56.2%. In case of T-P loading, that by livestock discharged form M-4 drainage area accounted for 44.3% of all T-P loading, and ratio of both of that by tourists and that from wastewater treatment plant gradually was estimated to be increased From above results, showing yearly change in pollution load of each water quality items is estimated to be increased continuously in every items, and in the influence of the pollution load of each drainage area upon Muju Namdaechon, M-4 drainage area was the biggest by accounting for 45% of total pollution load, and nest was ordered to M-1, M-2, M-3 and polltion load from wastewater treatment plant. The water quality of Namdaechon in Muju influenced by the study area was in the result of BOD 17.7%, SS 13.0%, T-N 28.2% and T-P 22.9%.

공사관리시스템의 전산화에서의 기능분석 연구

김윤성,전상규,김한웅 안성산업대학교 1995 論文集 Vol.27 No.-

The objective of the present study is to carry out a survey on the present uses of computerized systems construction management in the construction industries and to present a direction toward development and establishment of the systems which are useful and workable for an effective management tool. Many firms depend upon the commercial package programs imported from overseas. However, uses are limited to NAS systems among the built in functions. Many of the program in use are limited in practical application for their function being a oriented toward general uses.

Muliplex회로의 고역주파수 특성개선안

김한웅,윤태원 안성산업대학교 1991 論文集 Vol.23 No.-

This paper presents that subnetworks have been cut down and higher audio frequency range (20KHz∼37KHz) has been improved by substitution the active 2.B. S. F (notch frequencies: 19KHz and 38KHz) for the L. C. passive L. P. F in order to eliminate noises of 19KHz and 38KHz in the multlplex. According to the measured results, audio gain was increased more than 20dB contrasted L. C. passive L. P. F with the active 2.B. S. F, the average of channel separation was 42dB and signal to noise ratio was 73dB. In the viewpoint of the above results, I came to a conclusion that the theoretical analysis coincides with the experimental results in the real P. L. L. stereo multiplex circuits.

PCR 머신 제어 알고리즘 개발

김한웅 안성산업대학교 2002 論文集 Vol.33 No.-

In this paper, proposed for development of the PCR(polymerize chain reaction) machine using digital controllers. Designed PCR machine was consist of thermoelectric cooling(Peltier element), hardware(micro computer), firmware and user interface(RS232C communication etc.) parts. The purposed scheme consist of the digital controller which includes the PI type controller, and control efforts were calculated by fuzzy inference engine using look-up table methods. Proposed controller system was implemented by 87526BH micro computer systems which composed by real time clock, LCD monitor and key pad parts for user interface. Experiments were performed to show the effectiveness of a development system, proposed system's maximum overshoot and steady state error size were within ±1[℃], ±0.1[℃] scale.

複雜한 地形에서의 Schwartz-christofel 變換을 利用한 電位計算의 基礎的 硏究(Ⅰ)

金雄秀,林漢旭,徐栢洙 江原大學校 産業科學硏究所 1982 産業技術硏究 Vol.2 No.-

Schwartz-christofel transformation has been widely used to solve engineering problems. In this paper, this transformation is used to calculate topographic problems. Any two points of z-plane are transformed into ε-plane by Schwartz-Christofel transformation using calculator.

분산시스템에서 Performance에 기반을 둔 Optimal Leader Election에 관한 연구

金漢雄,陳祈範 안성산업대학교 1992 論文集 Vol.24 No.-

This thesis proposed new in the optimal election model new performance measure in the optimal election model and new optimal leader election scheme. In this paper, we analyzed, experimented and tested the proposed scheme using the simulation method and non-parametric statistics test method.