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고종명 한국식품위생안전성학회 1995 한국식품위생안전성학회지 Vol.10 No.3
Piperine, component of pure ground black pepper, has strong stimulative and trot. Analytical method for piperine was developed by high performance liquid chromatography. Analytical conditions are as follows; mobile phase is 70% methanol, detector LTV 343 nm (0.05 AuFa), column is Novapak 5 C_(10) (15 cm × 4.6 mm), flow rate is 1.0 ml/min, chart speed is 0.25 cm/ min and intjection volume is 20 Etl. Analytical results are as follows that relative standard deviation is 1.15%, calibration curve is y=170473.1×-7848.5 (R²=0.999) that shows good linearity. Standard solution of piperine is stable up to 10 hr and content of piperine in pure ground black pepper is 4.97±0.86%. Retention time of piperine in HPLC method is about 7 min. Therefore, the developed HPLC method including simple pretreatment of sample will be contribute to quality management.
비동기 설비 신호 상황에서의 강건한 공정 이상 감지 시스템 연구
고종명,최자영,김창욱,선상준,이승준 대한산업공학회 2007 산업공학 Vol.20 No.3
Success of semiconductor/LCD industry depends on its yield and quality of product. For the purpose, FDC (Fault Detection and Classification) system is used to diagnose fault state in main manufacturing processes by monitoring time series data collected by equipment sensors which represent various conditions of the equipment. The data set is segmented at the start and end of each product lot processing by a trigger event module. However, in practice, segmented sensor data usually have the features of data asynchronization such as different start points, end points, and data lengths. Due to the asynchronization problem, false alarm (type Ⅰ error) and missed alarm (type II error) occur frequently. In this paper, we propose a robust process fault detection system by integrating a process event detection method and a similarity measuring method based on dynamic time warping algorithm. An experiment shows that the proposed system is able to recognize abnormal condition correctly under the asynchronous data situation.
시계열 공정 관리 변수의 구조적 변화를 표현하는 특징 추출 알고리즘
고종명,김창욱 한국경영과학회 2009 한국경영과학회 학술대회논문집 Vol.2009 No.10
Recently, time-series process parameters such as pressure, temperature, and gas flow are used for diagnosing fault states in the processes by monitoring equiped sensor signals. For each parameter, the execution of the recipe steps made a sequences of subregions with distinct structural changes. This paper proposes a feature extraction algorithm for recognition of these structural changes. The algorithm consists of two parts. Firstly, we apply a Bezier curve in order to approximate the structural changes. The second part is to minimize error between observed sensor signal and the signal obtained from approximated curve by using gradient descent rule. Experiments show that the proposed algorithm is able to discover the approximated curve with high accuracy and low time complexity.
Wafer–to–Wafer Process Fault Detection Using Data Stream Mining Techniques
고종명,김창욱,홍성록,최자영 한국정밀공학회 2013 International Journal of Precision Engineering and Vol. No.
In this paper, we develop a wafer-to-wafer fault detection system using data stream mining techniques for a semiconductor etch tool. The system consists of two data stream mining modules: a trace segmentation module and a multivariate trace comparison module. Each time a wafer exits the processing chamber, the trace segmentation module extracts the traces of monitored tool parameters from raw sensor data streams. We propose a novel trace segmentation algorithm called multisensor-based trace segmentation. The algorithm finds the individual start and end times of monitored tool parameters in a wafer-to-wafer fashion. For analyzing faulty tool operations, the multivariate trace comparison module performs a new principal component analysis (PCA) called a trace structurebased PCA. For each tool parameter, the structural similarity distance between a template and the extracted trace is measured using a dynamic time warping algorithm. Then, the measurements are used to build the PCA model. This approach is contrasted with the traditional PCA procedure in which the trace means are used as the building blocks for the PCA model. Experiments using the data collected from a worksite reactive ion etch tool showed that the performance of the proposed system is very encouraging.
고종명,손지훈,안용덕,이기헌,양승환,김승호,박유석,이영훈 대한응급의학회 2009 대한응급의학회지 Vol.20 No.4
Purpose: Emergency department (ED) overcrowding results in loss in timely, effective medical care, as well as in social and economical efficiency. This paper proposes a new overcrowding index to reduce and to prevent these losses. Methods: We investigated the real-time situation of the emergency department in a major Korean hospital, compared to existing indices and to extracted factors to develop a new, customized overcrowding index based on the flow of patients, a reflection of emergency room conditions. We developed 3 indices, FFOI (Front Flow Overcrowding Index), BFOI (Back Flow Overcrowding Index), and TFOI (Total Flow Overcrowding Index). Each index was applied to test the period from 10 September 2007 to 16 September 2007. We extracted values of each index at 3- hour intervals and estimated how they reflected the overcrowding situation compared with basic overcrowding indices. We used the correlation coefficient and Kullback- Leiblur (KL) distance as the basis for measurement. Results: Existing indices are emergency department work index (EDWIN), national emergency department overcrowding scale (NEDOCS), and real-time emergency analysis of demand indicator (READI) work score (WS). EDWIN and READI did not reflect accurately the overcrowding situation. Some factors extracted from NEDOCS and WS were not suited to the emergency department. We solved these problems by develop in new indices. Conclusion: In conclusion, the new indices are more effective and descriptive than the existing indices with respect to correlation to crowdedness in the emergency department. In the future, the new, customized overcrowding index will become more descriptive if the necessary data is gathered in real time and more effectively verified by the medical staffs and patients.
咸羅 含炭層의 地質鑛床學的인 硏究 : 開發 價値性을 主로 한
高鍾明,朴洪民 全北大學校 1977 論文集 Vol.19 No.-
This region was surveyed by some researcher but we tried to a survey thoroughly area of 6.25 ㎢ in this area which is one part of Hamrasan formation, and also we tried to estimate developing probability of coalbearing formation in this area. This area shows complicated geological structure due to serious diastrophism and intrusion of igneous rocks and so we consider that it influences recovery of coal mining seriously.