http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
웨이브렛 변환을 이용한 GIS의 부분방전 검출 알고리즘에 관한 연구
강진수,김철환 대한전기학회 2003 전기학회논문지C Vol.53 No.6
Gas insulated switchgear(GIS) is an important equipment in a substation. It is highly desirable to measure a partial discharge(PD) in GIS which is a symptom before insulation breakdown occurs. The issue is that the PD signal is weak and sensitive to external noise. In this paper, the algorithm for detection of PD in GIS using wavelet transform is proposed. The wavelet transform provides a direct quantitative measure of spectral content, "dynamic spectrum", in the time-frequency domain. The recommended mother wavelet is 'Daubechies' wavelet. 'db4', the most commonly applied mother wavelet in the power quality analysis, can be used most properly in disturbance phenomena which occurs rapidly for a short time. Through the procedure of wavelet transform, noise extraction and reconstruction, the signal is Analyzed to determine the magnitude of PD in GIS. In experimental results, we can know that partial discharge is exactly detected in combination of Dl and D2 using wavelet transform.transform.
A Study on Variant Malware Detection Techniques Using Static and Dynamic Features
강진수,원유재 한국정보처리학회 2020 Journal of information processing systems Vol.16 No.4
The amount of malware increases exponentially every day and poses a threat to networks and operating systems. Most new malware is a variant of existing malware. It is difficult to deal with numerous malware variants since they bypass the existing signaturebased malware detection method. Thus, research on automated methods ofdetecting and processing variant malware has been continuously conducted. This report proposes a method of extracting feature data from files and detecting malware using machine learning. Feature data were extracted from 7,000 malware and 3,000 benign files using static and dynamic malware analysis tools. A malwareclassification model was constructed using multiple DNN, XGBoost, and RandomForest layers and the performance was analyzed. The proposed method achieved up to 96.3% accuracy
Hydrochlorthiazide에 의한 광 알레르기 반응
강진수,김태홍 ( Jin Soo Kang,Tae Heung Kim ) 대한피부과학회 1991 대한피부과학회지 Vol.29 No.6
We report a case of a photoallergic reaction induced by hydrochlorthiazide ingestion in 56-year-old male. the patient had an erythematous pruritic eruptions on the face, neck, and dorsum of the hands. After phototesting, there was a decrease in the minimal erythemal dose(UVA:5J/㎠). A photopatch test with 5% hydrochlorthiazide ointment was positive. A rapid improvement of the lesions occured after the cessation of hydrochlorthiazide adminitration.
강진수,김재엽,김진,정주원,임아연,손윤준,고민재,성영은 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
차세대 에너지원으로 각광받고 있는 태양전지 중 한 종류인 염료감응태양전지(DSC)는 저렴한 제조단가와 다양한 분야에서의 활용이 가능함에도 불구하고 기존 실리콘 및 박막 태양전지에 비해 성능이 낮아 제한적인 부분에서만 상용화가 이루어진 상태이다. DSC의 성능을 제한하는 요소는, DSC에서 광전극으로 가장 많이 사용되는 TiO<sub>2</sub>의 전자 전도도가 낮아, 생성된 고에너지 전자가 집전체에 도달하여 실제 전기에너지로 전환되는 비율이 높지 않다는 부분이다. 이를 해결하기 위해 전극을 1차원 구조로 제조하여 전자의 이동거리를 줄이는 등의 연구가 활발하게 이루어지고 있지만, 획기적인 성능 향상을 이루고 있지는 못하다. 이번 연구에서는 TiO<sub>2</sub>보다 전자 전도도가 좋은 SnO<sub>2</sub> 광전극을 나노채널 구조로 제조하여 DSC의 광전극으로 사용하여 다른 반도체 물질로 TiO<sub>2</sub>를 대체할 수 있을지에 대한 가능성을 검토해보았으며, SnO<sub>2</sub> 전극에 TiO<sub>2</sub>를 얇게 코팅하여 전해질과 전극 사이의 계면에서 일어나는 부반응을 최소화함으로써 성능을 높였다.
The robustness measures for decision-making in engineering design
강진수,이태용 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.1
Generally, uncertainties are considered with proper variability measures according to their characteristics (i.e. economic term or technical term). For economic robust optimization, the use of either worst-case value or partial mean as a robustness measure is proved to guarantee Pareto optimality. In this study, the comparison between worst-case value and partial mean is carried out in the viewpoint of a robustness measure. The study of the ill-conditioned natures of partial mean leads us to the conclusion that worst-case value is more reasonable for robust optimization. Furthermore, the robust optimization results with economic and technical consideration together are illustrated with the power capacity expansion model.