http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
퍼지기반 Segment-Boost 방법을 통한 효과적인 얼굴인식
장원석,노창현,이종식,Chang, Won-Suk,Noh, Chang-Hyeon,Lee, Jong-Sik 한국시뮬레이션학회 2009 한국시뮬레이션학회 논문지 Vol.18 No.1
This paper suggests fuzzy-based Segment-Boost method and an effective method for face recognition using the fuzzy-based Segment-Boost. Fuzzy-based Segment-Boost eliminates the limitations of Segment-Boost, and it guarantees improved learning performance and the stability of the performance. By using the fuzzy theory, fuzzy-based Segment-Boost optimizes the selection number of sub-vectors, and leads the optimized learning performance. The fuzzy controller designed in this paper measures learning performance of the fuzzy-based Segment-Boost, and it controls the selection number of sub-vectors by inferring the optimized selection number. The simulation results show that the fuzzy controller inferred the selection number which is very approximate to the true optimized value. As a result, fuzzy-based Segment-Boost showed higher face recognition rate than compared boosting methods and it preserves the velocity of feature selection as fast as that of Segment-Boost. From the experimental results, it was proved that fuzzy-based Segment-Boost has improved and stable performances of learning, feature selection and face recognition.
장원석,최규식,Chang, Won-Seok,Che, Gyu-Shik 한국정보통신학회 2010 한국정보통신학회논문지 Vol.14 No.12
임계치 이하의 자극이 주어지면 흥분막은 어떤 특이한 반응을 나타내지 않으나 어느 정도 이상이 되면 아주 다른 양상을 띄게 된다. 흥분막에는 이러한 특성이 있다는 것이 진작부터 알려져 있었고, 일부 연구자들이 이러한 현상을 전기적인 회로를 이용하여 정량적으로 해석하려 노력하였으나 그것은 임계치 이하의 경우에 대한 것에 불과하다. 특히 임계치 이상의 자극에 대한 반응을 정량적으로 연구한 경우는 극히 드물다. 그런데 전기회로와 생체는 비슷한 점도 있지만 다른 면도 많아서 그대로 이를 적용하기에는 무리가 있다. 이러한 이유로 인하여 본 논문에서는 생체막이 임계치 이상의 자극을 받았을 때에 어떠한 현상을 나타내는가를 전기적인 관점에서 정량적으로 연구하였다 When the inferiorthreshold potential is applied on the membrane, the resting status membrane does not display any specific reaction, in the meanwhile if it receives somewhat higher voltages then it shows entirely different configuration. The fact that there is this kind of characteristics on the exciting membrane has been known for a long time, and some researchers have tried to analyze this situation using the electrical circuits but only limitted to inferiorthreshold potential case. The quantitative studies of especially for transthreshold stimulus is extremely rare up to now. The direct application of electrical circuit to biostatus is somewhat uneasonable because there may be much differences between them. We studied the electrical reaction quantitatively of biomembrane when it receives the transthreshold stimulus in point of electricity in this paper.
관류 강조 자기공명 영상을 이용한 소아 모야모야 환아의 뇌 혈역학 분석
장원석,김태곤,이승구,최중언,김동석,Chang, Won-Seok,Kim, Tae-Gon,Lee, Seung-Koo,Choi, Jung-Uhn,Kim, Dong-Seok 대한신경외과학회 2005 Journal of Korean neurosurgical society Vol.37 No.3
Objective: Classically, single photon emission tomography is known to be the reference standard for evaluating the hemodynamic status of patients with moyamoya disease. Recently, T2-weighted perfusion magnetic resonance(MR) imaging has been found to be effective in estimating cerebral hemodynamics in moyamoya disease. We aim to assess the utility of perfusion-weighted MR imaging for evaluating hemodynamic status of moyamoya disease. Methods: The subjects were fourteen moyamoya patients(mean age: 7.21 yrs) who were admitted at our hospital between Sep. 2001 to Sep 2003. Four normal children were used for control group. Perfusion MR imaging was performed before any treatment by using a T2-weighted contrast material-enhanced technique. Relative cerebral blood volume(rCBV) and time to peak enhancement(TTP) maps were calculated. Relative ratios of rCBV and TTP in the anterior cerebral artery(ACA), middle cerebral artery(MCA) and basal ganglia were measured and compared with those of the posterior cerebral artery(PCA) in each cerebral hemispheres. Using this data, we analysed the hemodynamic aspect of pediatric moyamoya disease patients in regarding to the age, Suzuki stage, signal change in FLAIR MR imaging, and hemispheres inducing symptoms. Results: The mean rCBV ratio of ACA, MCA did not differ between normal children and moyamoya patients. However the significant TTP delay was observed at ACA, MCA territories (mean = 2.3071 sec, 1.2089 see, respectively, p < 0.0001). As the Suzuki stage of patients is advanced, rCBV ratio is decreased and TTP differences increased. Conclusion: Perfusion MR can be applied for evaluating preoperative cerebral hemodynamic status of moyamoya patients. Furthermore, perfusion MR imaging can be used for determine which hemisphere should be treated, first.
LNG 발전배가스 농축 CO₂를 이용한 액화 실증기술의 개발
최창식(Chansgik Choi),박수남(Su-nam Park),이혜성(Hye-sung Lee),박동규(Dong Kyoo Park),장원석(Won- seok Chang),남궁형규(Hyeong-gyu Namgung) 한국환경에너지공학회 2023 한국열환경공학회 학술대회지 Vol.2023 No.2
Liquified carbon dioxide (LCO₂) is a promising alternative to fossil fuels that can be used to reduce greenhouse gas emissions. There is growing research into the use of liquefied CO₂ (LCO₂) to reduce CO₂ emissions, which can be transported deep underground for carbon capture and storage (CCS) and LCO₂ for enhanced oil recovery (EOR). It can be used to extract additional oil by injecting it into oil fields, and can also be used as a raw material and refrigerant for the production of various fuels. This study attempted to conduct an empirical study on the production of LCO₂ with a purity of 90% or higher targeting concentrated CO₂ from LNG flue gas. This study was designed to secure empirical process development technology applicable to existing LNG power generation infrastructure and reduce greenhouse gas emissions in the future and reduce cliinate change. It is expected that it will make a significant contribution to mitigating the impact.
미분화된 미감(美感)적 연속, 동양 철학 그리고 화이트헤드 -비교 철학의 방법론을 위하여-
장원석 ( Won Suk Chang ) 한국화이트헤드학회 2013 화이트헤드 연구 Vol.26 No.-
이 논문은 철학자 필머 노드롭의 미분화된 미감적 연속이라는 개념을 중심으로 한 그의 비교철학 논구를 음미하면서 그의 유산이 현재 비교철학탐구에 비추어 어떻게 평가되어야 하는가를 논하고 있다. 필머 노드롭은 이미 초기의 과학 철학적 탐구에서 지적으로 구성한 요청에 의한 개념과 더불어 의식적으로 직접적으로 경험 되었으며 분화 되지 않은 것으로서, 덧없고 상대적이며 차별된 인식자는 물론 차별된 인식 객체들 역시 아울러 포용하며 인식 주체와 객체 속에서 동일한 그 무엇인, 표현하기 힘든 경험의 근원적 요소를 언어로 표현하려고 노력하고 있었다. 그리고 그는 훗날 ‘미분화된 미감적 연속’이라는 개념으로 명명한 이 경험의 요소를 설명하면서 동양 철학전통에서 이 개념이 갖는 중요성을 탐구하게 된다. 그는 이 개념을 유가, 도가, 불교 등 동양 철학 전통을 해석하는데 사용하면서 동서 비교철학활동에서 동서양 전통의 차이를 강조하고 동양철학전통을 미감적 경험적 관점에서 해석해야 함을 주장하여 초월적 관점과는 구별되는 비교 철학적 방법론을 발전시켰다. 이 논문은 그가 발전시킨 방법론을 평가하면서 이를 화이트헤드의 상징적 준거론과 비교 하였다. 이를 통해 그의 비 환원적인 비교철학 방법론을 높이 평가하였고 동시에 그의 지식 분류법이 갖는 약점을 지적하였다. In this article, I attempt to appreciate the method of comparative philosophy and idea of “undifferentiated aesthetic continuum” developed by F. S. C. Northrop. As early as his first monograph about philosophy of science, he felt the need to have an idea of directly experienced, undifferentiated entity that includes differentiated, transitory perceiver and events. This undifferentiated entity as source of differentiated experience also blurs sharp distinction of self and environment, perceiver and perceived. Later coining the term “undifferentiated aesthetic continuum” to denote this, he already has realized the importance of this idea in interpreting Eastern philosophical tradition properly. In his comparative philosophical inquiries, he used it interpreting Confucianism, Daoism and Buddhism. His method makes inquirers to be aware of difference between eastern thought and dominant western philosophical tradition, while Eastern tradition can be interpreted more aptly from the standpoint of aesthetic and radical empiricism, which can be distinguished from transcendental or reductionist way of interpretation. I compare his epistemology with idea of symbolic reference in the process philosophy of Whitehead and conclude that Northrop`s taxonomy of knowledge can be criticized by process philosophical perspective while core of his method and idea are viable today for comparativists.
장원석(Won-Seok Chang),송선아(Sun-Ah Song),김재현(Jae-Hyun Kim),한창수(Chang-Soo Han) 대한기계학회 2009 大韓機械學會論文集B Vol.33 No.10
In this study, the strain sensing characteristics of single-wall carbon nanotubes(SWCNTs) networks were investigated to develop a film sensor for strain sensing. The SWCNTs film are formed on flexible substrates of poly(ethylene terephthalate) (PET) using spray process. In this manner we could control the transparency and obtain excellent uniformity of the networked SWCNT film. The carbon nanotube film is isotropic due to randomly oriented bundles of SWCNTs. Using experimental results it is shown that there is a nearly linear change in resistance across the film when it is subjected to tensile stress. The results presented in this study indicate the potential of such films for high sensitive transparent strain sensors on macro scale.