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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.
조기위암에서 침윤, 유형 및 분화도에 따른 p53, bcl-2의 발현
권오선,조현득,오미혜,김의한,양승하 순천향의학연구소 2006 Journal of Soonchunhyang Medical Science Vol.12 No.2
Purpose: For evaluation of the role of tumohgenesis of p53 over expression and bcl-2 inhibition in early gastric cancer, the immunohistochemical tissue status of 31 primary early gastric cancer patients was investigated, and also the association between p53 , bcl-2 expression status and clinicopathologic parameters was analyzed for evaluation of prognostic relevance. Materials and Methods: DO7, a monoclonal antiserum to p53 protein and clone 124, monoclonal antibody to bcl-2 protein were used for the immunohistochemical analysis in 31 primary early gastric cancer tissue. The expressions were scored and divided into negative, positive, low expression, and over expression. Results: The clinocopathologic parameters; tumor depth of invasion, histologic type and differentiation were not related with the expression status of p53 and bcl-2. In 31 cases, the p53 over expression was 14 cases(45.2%), and the bcl-2 positive expression was 15 cases(48.4%), and 9 cases(29.0%) were the status of p53 over expression and bc1-2 positive expression. Conclusions: These results suggest that altered cell cycle and apoptosis control by p53 and bcl-2 may be an event in carcinogenesis of early gastric cancer but there are many other mediators that may fascilitate tumorigenesis.
기체크로마토그래피/질량분석기에 의한 저질 및 토양시료 중 벤조페논의 분석법 연구
권오승,김은영,류재천 한국환경독성학회 2001 환경독성보건학회지 Vol.16 No.3
Analytical method of benzophenone (BP) in sediment and soil was developed by gas chromatography/mass selective detector/selected ion monitoring (GC/MSD/SIM). The ultrasonic extraction of US EPA (method 3550B) method and liquid-liquid extraction for sediment and soil samples were used for the analysis of BP from sediment and soil. BP was extracted with n-hexane. Organic layer was washed with 5% sodium chloride solution. 1-2㎕ of the concentrated solution of organic layer was applied to GC/MSD. The retention time of BP peak was 11.10 min. Recovery (%) of BP by ultrasonication from sediment and soil samples was 96.0~100.6% and 40.0~83.0%, respectively. Recovery of BP by liquid-liquid extraction was 51~59% in soil samples. The detection limit of BP in sediment and soil samples were determined to 0,1 ng/g.
權五億,徐承敎,姜善泰 대구산업정보대학 1992 논문집 Vol.6 No.-
Past dicharges of settleable and colloidal organic solids into natural waterways have resulted in appreciable accumulations of sediment in the botton of many lakes, estuaries and river stretches over the years. Under such conditions, bottom sediments, when present, may be come one of the most important factots influencing the quality of natural water. Thus, this study was performed to investigate the nutrients release through chamber experimentation at Gangchang bridge which one of polluted places in Kumho River. The coefficients of sediment oxygen demand for aerobic and anaerobic conditions were 0.864, 5.04 day^(-1), respectively. Also, the release rate of NH₃-N and PO₄-P for aerobic conditions were 0.242g/m²·day, 0.029g/m²·day, and the released rate of NH₃-N and PO₄-P for anaerobic condition were 0.665g/m²·day, 0.186g/m²·day, respectively.
인삼사포닌의 소장내 최종대사산물인 IH-901의 수용액중 가용화
권오승,정연복 한국약제학회 2004 Journal of Pharmaceutical Investigation Vol.34 No.5
The purpose of the present study was to formulate the aqueous solution of 20-O-β-D-glucopyranosyl-20(S)-protopanaxadiol (IH-901), an intestinal bacterial metabolic derivative from Ginseng protopanaxadiol saponin. For this pur-pose, the effects of various solubilization agents such as cosolvents [ethanol, propylene glycol (PG), polyethylene glycol 300 (PEG 300). polyethylene glycol 400 (PEG 400), glycerin], surfactants (Tween 80, Cremophor RH40, Cremophor?EL, Poloxamer 407, Poloxamer 188) and a complexation agent [hydroxypropyl-β-cyclodextrin (HPBCD)], on the solubility of IH-901 in aqueous solution were evaluated. The solubility of IH-901 in water was under 1 μg/ml at 20℃. Cosolvents such as ethanol, PG, PEG 300, PEG 400 and glycerin did not enhance the solubility of IH-901 at the 0 - 40% concentration range. The solubility of IH-901 was significantly elevated by the addition of cosolvents over the 80% concentration range. On the other hand. tween 80, Cremophor" EL, Cremophor" RH40 and HPBCD showed enhanced effects on the solubility of IH-901. The enhanced effects of Poloxamer 407 or Poloxamer 188 on the IH-901 solubility were less pronounced compared with Cremophor" EL or Cremophor' RH40. As a results. Cremophor"' aqueous solution was selected as an optimum solvent system. The aqueous solutions containing 10% Cremophor EL and 7% Cremophor' RH40 were formulated as dosing solutions containing 5.0 mg/ml of IH-901 for its intravenous and oral administration, respectively. The formular showed physical stability after stored for 7 days at 4℃.
粘土鑛物의 混入이 Mortar의 性狀에 미치는 影響에 關한 實驗的 硏究
朴承範,權吳憲 충남대학교 공업기술개발연구소 1976 工業技術開發硏究所論文集 Vol.3 No.2
This paper discribes an experimental study on the properties of Cement-Bentonite mortar for grouting. Recently, low strength cement mortar mixed with clay minerals has been widely employed in foundation treatment, cutoff wall and curtain, strengthening soft soil layer, etc. The experiments were intended to clarify the properties of the cement mortar with the bentonites which were available in the local market. Of the study, fluidity, tendency of segregation and compressive strength of mortar were analyzed with two kinds of clay minerals, namely, A and B-Type Bentonite.
MPLS망에서 RSVP와 DiffServ연동모델의 성능분석
최승권,오구영,지홍일,신승수,조용환 충북대학교 산업과학기술연구소 2002 산업과학기술연구 논문집 Vol.16 No.1
The explosive growth of the internet traffic has imposed tremendous stress on routers, particularly, in the core network. Today's IP services reflect the unpredictable and undifferentiated packet loss and jitter characteristics of traditional best-effort routers. For above requirements, it is required not only the high-speed transmission of the packet, but the new routing function, the guarantees of QoS and bandwidth, the supports of user-requested services MPLS is proposed by the IETF and many other research institute as the solutions for this problem. In this paper, analyze performance of QoS Model applied RSVP over DiffServ to MPLS network. this model is each RSVP applied access network and DiffServ applied core network. In Result, It is amiss that basis MPLS net uses to core network because the average packet loss rate and average delay time are increased if traffic increases. Experiment result was seldom difference in case of network that apply each RSVP, DiffServ, RSVP over DiffServ. RSVP over DiffServs case packet loss rate and delay time were low than DiffServ and the packet loss rate is high because comparing than RSVP but delay time was very low.