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퍼지 로직과 인공신경망을 이용한 자동차용 연료전지 스택의 지능형 진단방법 개발
이용현(Young-Hyun Lee),강원우(Wonwoo Kang),유승열(Seungyeol Yoo) 한국자동차공학회 2018 한국 자동차공학회논문집 Vol.26 No.5
For Fuel Cell Electric Vehicles(FCEV) to attain a competitive advantage today, durability and an acceptable automotive system cost are requisite. The durability of the Proton Exchange Membrane Fuel Cell(PEMFC) stack used in the FCEV is ensured particularly in real-time, on-line diagnosis and optimal control. To address price competitiveness, it is necessary for the main part to minimize the cost of the platinum catalyst that is usually not unavoidable. In this paper, we developed intelligent diagnosis methods by using Fuzzy Logic algorithms and Artificial Neural Networks to improve the existing, real-time diagnosis methods. We also deployed an intelligent diagnosis method on a real FCEV stack to verify the algorithm. To analyze the dynamic characteristics, the HWFET(Highway Fuel Economy Test) driving cycle was used.
이용현,최경진,유승열,Lee, Young-Hyun,Choi, Kyung-Jin,Yoo, Seung-Ryeol 한국반도체디스플레이기술학회 2006 반도체디스플레이기술학회지 Vol.5 No.3
This paper investigates cutting qualities after laser dicing and predicts the problems that can be generated by laser dicing. And through 3 point bending test, die strength is measured and the die strength after laser dicing is compared with the die strength after mechanical sawing. Laser dicing is chiefly considered as an alternative to overcome the defects of mechanical sawing such as chipping on the surface and crack on the back side. Laser micromachining is based on the thermal ablation and evaporation mechanism. As a result of laser dicing experiments, debris on the surface of wafer is observed. To eliminate the debris and protect the surface, an experiment is done using a water soluble coating material and ultrasonic. The consequence is that most of debris is removed. But there are some residues around the cutting line. Unlike mechanical sawing, chipping on the surface and crack on the back side is not observed. The cross section of cutting line by laser dicing is rough as compared with that by mechanical sawing. But micro crack can not be seen. Micro crack reduces die strength. To measure this, 3 point bending test is done. The die strength after laser dicing decreases to a half of the die strength after mechanical sawing. This means that die cracking during package assembly can occur.
이용석 ( Yong Seok Lee ),이영준 ( Young Joon Lee ),한창현 ( Chang Hyun Han ) 한방재활의학과학회 2013 한방재활의학과학회지 Vol.23 No.3
ObjectivesWe will provide basic information on bee venom clinical tests and aid the practical use of bee venom in such tests, through examination of RCT research related to bee venom that was reported domestically. MethodsWe collected 365 articles on Bee venom study result from the OASIS system using the Keyword ‘bee venom, apitoxin, apitherapy, bee sting’. The initially selected theses were primarily screened for clinical research. Out of these, case studies and non randomized controlled trial (non-RCT) were ruled out. As a result, 39 studies of randomized controlled trial (RCT) research were chosen as the subjects of study. ResultsRCT research related to bee venom was first presented in 2003, and 39 studies have been published until 2012. 18 studies were tests to confirm the effectiveness of bee venom, 7 studies were comparisons between SBV and BV, and 13 studies were comparisons with other types of treatment. Research conducted through appropriate randomization methods were 20 studies, and inappropriate randomization methods were used in 19 studies. In therms of Jadad score, 12 studies received 4~5 points, 15 studies received 1~3 points, and 12 studies received zero point. ConclusionsIn order to assure good quality RCT research, appropriate guidelines should be provided, and proper evaluation standards should be established. In-depth study is needed concerning the difference of responses to treatment according to the types of treatment received. A standardization of treatment should be reached as a result. (J Korean Med Rehab 2013;23(3):87-106)
증예(症例) : Kartagener 증후군 환자의 급성호흡부전-비침습적 환기치료로 호전된 1예
백경현 ( Kyung Hyun Paeck ),홍윤경 ( Yun Kyung Hong ),이가영 ( Ka Young Lee ),김소리 ( So Ri Kim ),민경훈 ( Kyung Hoon Min ),박성주 ( Seoung Ju Park ),이홍범 ( Heung Bum Lee ),이용철 ( Yong Chul Lee ),이양근 ( Yang Keun Rhee ) 전북대학교 의과학연구소 2006 全北醫大論文集 Vol.30 No.1
Kartagener 중후군 환자에서 급성호흡부전이 발생할 경우, 원인이 되는 호흡기 감염과 염증을 조기에 치료하고 이에 더불어 발생하는 심각한 호흡부전상태를 해결하기 위해 기관내 삽관을 통한 침습적 기계호흡을 대신하여 비침습적 양압환기를 시도해 볼 수 있다. 이러한 비침습적 양압환기는 효과적으로 적절한 가스 교환과 호흡근의 휴식을 가능하게 하여 생존율을 향상시키며, 반복되는 기관내 삽관 또는 기관절개술로 인한 합병증을 줄이고 언어, 식사 등의 일상생활을 가능하게 하여 삶의 질을 향상시킬 수 있는 장점을 가진다. 효과적인 비첨습적 양압환기를 위해서는 적절한 마스크의 선택과 정확한 착용이 중요하고 환자의 교육과 격려가 필요하다. 저자들은 Kartagener 증후군으로 치료받던 환자에서 폐렴과 동반되어 발생한 급성호흡부전을 항생제 치료와 함께 흡기시 양기도압과 호기시 양기도압을 조절하는 자발호흡 방식의 비첨습적 양압환기를 시행하여 성공적으로 치료하였기에 문헌 고찰과 함께 증례를 보고하는 바이다. Kartagener`s syndrome is characterized by the triad of situs inversus, bronchiectasis, and chronic pansinusitis. With pulmonary infection such as pneumonia or other certain conditions, pulmonary symptoms of Kartagener`s syndrome are aggravated and hypoventilation and hypercapnia are exacerbated. These conditions may induce acute respiratory failure (ARF). Noninvasive positive pressure ventilation (NPPV) is well tolerated and safe, and it has assumed a prominent role in the management of ARF. The attraction for NPPV relates primarily to its advantages over invasive mechanical ventilation. It is used in patients with ARF due to exacerbations in chronic obstructive pulmonary disease or cardiogenic pulmonary edema. We report a case that ARF in a patient with kartagener`s syndrome is successfully treated with NPPV.
한창현 ( Chang Hyun Han ),이용석 ( Yong Seok Lee ),권오민 ( Oh Min Kwon ),이영준 ( Young Joon Lee ) 경락경혈학회 2013 Korean Journal of Acupuncture Vol.30 No.1
Objectives: The focus of the analysis was laid on changes in research pertaining to bee venom in regards to time progression. Methods: We collected 365 articles on Bee venom study result from OASIS system using the Keyword ``bee venom, apitoxin, apitherapy, bee sting``. We figured out number and percentage of theses according to year, study method, journal, subject. Results: Bee venom papers published in the journal of korean medicine from 1976. The classification of papers associated with bee venom, clinical studies outnumbered the other study types by a ratio of 1.3 to 1, followed by 138 for experimental papers, and 22 for literature studies. Proportion of Experimental Papers Classified According to the Theme, 16 for pain-killing, 14 papers concentrated on apoptosis, anticancer, 13 for anti inflammatory, 11 for arthritis, and other disorders were followed. Type analysis of papers associated with bee venom in clinical trials, lumbar disorders comprised 38 out of 205 papers, 35 papers concentrated on upper limb disorders, 34 papers concentrated on systemic disease, followed by the effect on body. Conclusions: Bee venom is a treatment method based on the unique theory of Korean traditional medicine. Its effort and academical approach on bee venom are expected to receive positive evaluation through numerous research works.