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신경회로망 제어기를 이용한 PID 파라미터 추정에 관한 연구
權重東,裵銀敬,金恩基,全基英,李承桓,吳鳳煥,李勳九,金容珠,韓慶熙 明知大學校 産業技術硏究所 2006 産業技術硏究所論文集 Vol.25 No.-
In this paper, supposed to solve these problem to PID parameters controller algorithm using ANN. In the proposed algorithm, the parameters of the controller were adjusted to reduce by on-line system the error of the speed of IM. In this process, EBPA NN was constituted to an output error value of an IM and conspired an input and output. The performance of the self-tuning controller is compared with that of the PH) controller tuned by conventional method (Ziehler-Nichols). The effectiveness of the proposed control method is verified thought the Matlab Simulink and experimental results.
유한요소 해석을 이용한 현장 콘크리트 부착강도 측정조건
김성환,정원경,권 혁,김현오,이봉학 江原大學校 産業技術硏究所 2002 産業技術硏究 Vol.22 No.A
The performance of old and the new concrete construction depends upon bond strength between old and the new concrete. Current adhesive and strength measurement method ignores the effect of stress concentration from shape of specimens. Therefore, this research calculates stress concentration coefficient as the ratio of drilling depth to drilling diameter(h_s/D), the ratio of overlay thickness to drilling diameter(h_o/D), the ratio of steel disk thickness to drilling diameter(t/D), the ratio of overlay elastic modulus to substrate modulus(E_l/E_0), the distance from core to corner border(L_corner) and the distance between cores(L_core) vary. The finite element method is adapted to analysis. The results from the F.E.M analysis are as follows : The stress concentration effects can be minimized when the ratio of drilling depth to drilling diameter(h_s/D) is 0.20∼0.25, the elastic modulus ratio(E_l/E_0) is 0.6~1.0, and the ratio of steel disk thickness to drilling diameter(t/D) is 3.0. The overlay thickness, the distance from specimens to corner border(L_corner), the distance between cores(L_core) almost do not affect to the stress concentration.
컨테이너 터미널의 효율적 운영을 위한 의사결정지원시스템
김갑환,김홍배,윤원영,김종훈,권봉재,조지운 釜山大學校生産技術硏究所 1998 生産技術硏究所論文集 Vol.55 No.-
A decision support system is introduced for the efficient operation of port container terminals. It consists of ship planning subsystem, yard planning subsystem, resource management subsystem, real-time control subsystem, and simulation subsystem. The system is intended to support the planning process of the planners and the operation process of the administrators in the container terminals. It is assumed that the transfer crances and the yard tractor/trailers are used to handle containers in the marshaling yard. The system is explained in terms of the functions of each subsystem and the data flows among various subsystems.
복합열화환경하에서의 중성화 및 염화물이온 확산특성이 철근부식에 미치는 영향에 관한 실험적 연구
조봉석,장재봉,김재환,김용로,권영진,김무한 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2
It is recognized that reinforcement corrosion is the main distress behind the present concern regarding concrete durability. In this study, to confirm corrosion of reinforced concrete due to permeability of carbonation and chloride ion affected by thickness of cover, kinds of surface coating, measured electric potential, ratio of corrosion area, weight reduction, corrosion velocity of steel bar under environment of complex deterioration. The results showed that an increase in age also decreases Carbonation velocity coefficients and increases Chloride ion diffusion coefficients. As well, an increase in age also increases corrosion of reinforcement due to permeability of carbonation and chloride ion. Corrosion of reinforcement by thickness of cover is superior to 10mm thick than 20mm thick. It showed that an increase in thickness of cover prevent steel bar from deteriorating due to permeability of carbonation and chloride ion. The results of this study showed that corrosion velocity was affected by thickness of cover, kinds of surface coating. data on the development of corrosion velocity made with none, organic B, organic A, inorganic B. and inorganic A is shown.
홍봉식,김태균,오승엽,김환우,권오석 충남대학교 공업교육연구소 1983 論文集 Vol.6 No.2(A)
The currenty offered experiment courses are completely reconsidered and reconfigured. The whole subjects are divided into 10 seperate courses, each of which should represent either basic or advanced stages of differing fields of the electronic engineering. It has been aimed that the courses form an elaborate hierachy so that they are minimally redundant but linked to one another in their fringes. Also, it has been pursued that the new courses should not fall obsolete in at last next five years exploring the maximum possibilities of the currently available equipments.
김상희,김봉진,이규환,이찬원,권영택 경남대학교 환경문제연구소 1995 환경연구 Vol.17 No.-
The Milyang River in one of the tributaries which affects the water qualify of the Nakdong river. The STREAM(Segment Travel River Ecosystem Autograph Model) was applied to estimate the purification capacity of the Milyang river. The entire study area(23 ㎞) was divided into 13 reachs. Each reach was then subdivided into uniform reaction cell of 0.1 ㎞. Field data were obtained from two field sampling surveys during Summer(Agust, 1993) and Fall (November, 1993) periods. The model was calibrated by the August survey data and verified by the Fall survey data. The computed values by the model were in good agreement with the measured values. The concentrations of BOD_(5), COD, total suspended solids(TSS), orthophosphate (PO₄-P), and ammonia nitrogen(NH₃-N) were increased by stair style at the segment of 7.0~11.0 ㎞ where input waste loads were directly coming from the downtown of Milyang City. The water quality of downstreams after this stair-style increase was not recovered as before. The increases of carboneous organic, nitrogen and phosphorus showed the limitation of purification capacity downstreams before joing to the Nakdong River.
매실박, 당근박, 감귤박 급여가 산란계 난황의 Vitamin E, K 함량에 미치는 영향
최승현,나재천,권오상,박상미,이봉덕,안길환 충남대학교 농업과학연구소 2008 농업과학연구 Vol.35 No.2
This experiment is a quantitative experiment where insoluble Vitamins E and K are extracted from the yolk of the spawning which was fed by by-products of tangerine, carrot, or Japanese apricot. Finally the purpose is to raise contents of the insoluble Vitamins E and K inside the yolk of the spawning. The saponification method through α, α - dipyridyl was used to determine the content of Vitamin E. Diethyl dithiocarbamate assay was used to examine the content of Vitamin K. The contents of Vitamin E in egg yolks of chicken fed by by-products of tangerine, carrot, or Japanese apricot increased 2 - 3 times compared to control egg, while the contents of Vitamin K almost no changed. 본 실험에서는 감귤, 매실, 당근의 껍데기로 감귤박, 매실박, 당근박을 먹여 산란계의 난황에 들어있는 Vitamin E와 K 함량을 높이고자 했다. Vitamin E 추출방법에는 검화방법인 α, α -dipyridyl에 의한 비색정량법을 사용하였으며 전처리 과정 중 석유 ether를 가하여 층을 분리하는 과정과 증류수를 가하여 층을 분리하는 과정에 있어서 신중을 가하였고 신속한 시료 전처리과정이 요구되었다. Vitamin K 추출에는 Diethyl dithiocarbamate에 의한 방법이 사용되었다. 실험결과 일반난황에서의 Vitamin E 함량보다 실험난황에서의 Vitamin E 함량이 2배 이상 높아졌음을 알 수 있었던 반면 Vitamin K의 함량은소량 증가하여 큰 변화가 없었다. 위의 결과를 통해서 난황에 이전된 Vitamin E의 종류가 무엇이며 어떠한 형태의 Vitamin E가 이전이 많이 되었는지를 확인하는 실험이 필요할 것이다. 이러한 추가적인 실험이 이루어졌을 때 상업적으로 이용한 가치가 있는 가를 고려하여야 할 것이다.
뇌하수체 종양 제거술 시행 후 뒤늦게 발생한 횡문근 융해증과 동반된 중추성 열
장제혁,최규남,김일환,노은지,김윤정,유충헌,고정해,박봉수,김태균,권민정,이순희,박정현 인제대학교 2008 仁濟醫學 Vol.29 No.-
Body temperature is controlled by thermoregulatory center of the hypothalamus. We report a case of 24 years old man with central fever. He was subjected to a partial excision of pituitary tumor compressing optic chiasm four years ago. He has received hormonal therapy for panhypothyroidism after removal of pituitary tumor. And He received gamma knife operation for partially contrast-enhancing masses in suprasellar and both hypothalamic areas that is probably postoperatively remnant or recurrent tumor of pituitary adenoma. One year after gamma knife operation, he presented with a febrile syndrome of unknown origin including rhabdomyolysis. All usual investigations proved negative. We diagnosed him as central fever with rhabdomyolysis. He received medical ICU care with cooling bed, ice pack. And his symptom improved. Postoperative hyperthermia may result following resection of the pituitary tumor. When central fever is suspected taking note of past history, a quick recognition of course of fever can help reduce the using of unnecessary antibiotics and hospital stay.