• Title/Summary/Keyword: using pattern

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Optimal Design of Coverglass Pattern in Building-Integrated Photovoltaic for Improved Yearly Electrical Energy (Building-Integrated Photovoltaic 시스템의 연간 발전 에너지 향상을 위한 커버글라스 패턴의 최적설계)

  • Kim, Taehyeon;Lee, Seung-Chul;Park, Woo-Sang
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.33 no.4
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    • pp.297-302
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    • 2020
  • A coverglass pattern was designed to improve the annual electrical energy production of a building-integrated photovoltaic (BIPV) module installed in the exterior walls of buildings. The transmittance pattern was calculated using ray tracing, and the results were derived by optimizing the simulation using Taguchi's method. We obtained the optimal pattern by analyzing the conventional patterns for improving the transmittance and derived design factors by quantifying the pattern. By calculating the influence of electrical energy on each design factor, we obtained the optimal coverglass pattern that produced the maximum annual electrical energy. The annual electrical energy production improved by approximately 11.79% compared to the non-patterned coverglass.

Adaptive sEMG Pattern Recognition Algorithm using Principal Component Analysis (주성분 분석을 활용한 적응형 근전도 패턴 인식 알고리즘)

  • Sejin Kim;Wan Kyun Chung
    • The Journal of Korea Robotics Society
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    • v.19 no.3
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    • pp.254-265
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    • 2024
  • Pattern recognition for surface electromyogram (sEMG) suffers from its nonstationary and stochastic property. Although it can be relieved by acquiring new training data, it is not only time-consuming and burdensome process but also hard to set the standard when the data acquisition should be held. Therefore, we propose an adaptive sEMG pattern recognition algorithm using principal component analysis. The proposed algorithm finds the relationship between sEMG channels and extracts the optimal principal component. Based on the relative distance, the proposed algorithm determines whether to update the existing patterns or to register the new pattern. From the experimental result, it is shown that multiple patterns are generated from the sEMG data stream and they are highly related to the motion. Furthermore, the proposed algorithm has shown higher classification accuracy than k-nearest neighbor (k-NN) and support vector machine (SVM). We expect that the proposed algorithm is utilized for adaptive and long-lasting pattern recognition.

A Study of Pattern Making of Dooroomaky by Computer (컴퓨터에 의한 한복 여자 두루마기 원형제도에 관한 연구)

  • Kim Hee Sook
    • Journal of the Korean Society of Clothing and Textiles
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    • v.12 no.3 s.28
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    • pp.319-331
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    • 1988
  • The purpose of this study was to develop a computer program for pattern making of women's Dooroomaky. The following results were given through utilizing the Computer in pattern making of Dooroomaky for women. 1. Computerization of the pattern making process was expected to provide higher accuracy and efficiency in pattern making. 2. Basic pattern was drafted by the hand-operation. In this study, this Dooroomaky basic pattern was selected. And a computer program for drafting was developed. Refer to

    1. 3. Basic points which can be connected to depict basic pattern are represented with the numerical expression and the curved lines consist of the types of Arc Command. 4. In order to draft straight lines of the basic pattern, relative co-ordinate values of all standard points were prescrived and each two standard points were connected in straight lines respectively. 5. The patterns of Dooroomaky were automatically depicted by inputting the standard size (large, medium and small) find body measurement for pattern(bust girth, center back length, sleeve length, Dooroomaky length). 6. Grading of standard size was accomplished by using same method.

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  • The Relationship between Epicardial Fat Thickness and Dampness-Phlegm Pattern in the Patients with ischemic stroke

    • Woo, Ji Myung
      • The Journal of Korean Medicine
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      • v.38 no.4
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      • pp.104-109
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      • 2017
    • Objectives: Epicardial fat is true visceral fat that is known to be associated with metabolic syndrome, high abdominal fat, insulin resistance, coronary artery diseases, low coronary flow reserve and subclinical atherosclerosis. Dampness-Phlegm pattern is one of the pattern diagnosis of traditional Korean medicine. Previous studies showed that Dampness-Phlegm pattern is associated with hypertension, dyslipidemia, metabolic syndrome. This study is intended to find association between Dampness-Phlegm pattern and epicardial fat thickness. Methods: This study was a community-based single center trial. Ischemic stroke patients within 30 days after their ictus were enrolled. Epicardial fat thickness was measured using transthoracic echocardiography. Other measured and obtained variables are medical history, weight, height, body mass index, fasting blood glucose, cholesterol, triglycerol, high density lipoprotein, lipid and low density lipoprotein. Results: Three hundred sixty six were enlisted, and one hundred forty were diagnosed with the Dampness-Phlegm pattern. Dampness-Phlegm pattern group had significantly thicker epicardial fat. Binary logistic regression also showed statistically significant result. Conclusions: This study showed close association between epicardial fat and Dampness-Phlegm pattern. This result suggests a clue to standardization of pattern identification.

    The Study of the Image and Positioning according to Stripe Pattern and Clothing Style (스트라이프 문양과 의복스타일에 따른 이미지 차이와 포지셔닝 연구)

    • Moon, Ju-Young
      • Fashion & Textile Research Journal
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      • v.12 no.1
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      • pp.1-9
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      • 2010
    • A purpose of this study was to find out how the casual and formal style clothes of stripe pattern giving variety by pattern direction, pattern width, and contrast coloration have an effect on image of wearers. 432 stimuli were made and 2,800 testee evaluated them using semantic differential scale. As a result, five image dimensions were drawn as a factor of attractiveness, activeness, gracefulness, visibility, and tenderness. In consequence of analysing the image difference by stripe pattern and clothing style, the stripe pattern and clothing style affect image presentation as a significant clue. And besides, as a result of positioning stimuli by image, pattern direction, coloration, and tone combination were important clues that decide image. Consequently, clothing style, stripe pattern, and contrast coloration were made clear as an efficient parameter in image presentation of clothing wearers.

    Briefs Pattern Making for Women in their 20's using 3D Parametric Human Body Model (3차원 파라메트릭 모델을 활용한 20대 성인 여성용 브리프 패턴 설계)

    • Choi, Sin-Ae;Park, Soon-Jee
      • Fashion & Textile Research Journal
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      • v.12 no.5
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      • pp.642-649
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      • 2010
    • This study was designed to generate briefs pattern for women in their twenties using 3D parametric body model. 151 women in their 20's were random sampled and measured using Martine's anthropometry. And one subject was chosen as the representative subject for 3D scanning. Parametric model was generated of using CATIA P3, Unigraphics NX4.0, Rapidform 2006. And the 3D surface of parametric body model was flattened onto the 2D plane. 3 downscale ratios(0%, 10%, 15%) were applied to generated pattern to figure out what downscale ratio was suitable to make briefs with stretch fabric. 4 kinds of experimental briefs were made with stretch fabrics(0%, 10%, 15% downscale) and worn on the dressform. Subjective evaluation on the appearance was done and the data was analyzed by ANOVA with post-hoc test. Briefs pattern was generated through the process of flattening the parametric surface and arranging the patches to make briefs pattern by dart manipulation. The different ration of outline and area between 3D surface and 2D pattern were 0.22% and 0.09% respectively. It showed that a parametric model could provide a desirable pattern with minute size error. The results of subjective evaluation on the appearance of 4 experimental briefs showed that stretch briefs with 15% downscale ratio was evaluated most highly in most items. Findings imply that it is feasible to apply 3D parametric model to generate patterns for various items considering various fabric properties.

    Drafting Method of Upper Bodice Pattern using 3-D Anthropometric Data for Elderly Women (노년 여성 3-D 입체형상 데이터를 활용한 상반신 원형 설계방법 연구)

    • Suh, Chu-Yeon;Park, Soon-Jee
      • Journal of the Korean Society of Clothing and Textiles
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      • v.32 no.5
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      • pp.846-858
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      • 2008
    • This study was designed to propose a method to draft bodice block pattern from 3D body scan data. Subjects were ten elderly women in their 60's, who wear basic size(B: 94cm, W: 82cm) garment. Scanning was done using 3D whole body scanner(WB4, Cyberware). Measurements for 3D data and cross section were attained using Auto CAD, by which a upper bodice pattern for elderly women was drawn on the basis of short measured method. The results are as following: As for most items, no significant differences were shown between measurements from Martin's anthropometry and those from 3D scan data, suggesting measurement from 3D scan data could be used to draft a pattern. The drafting equations acquired were as follows; width of pattern=B/2+5.5, width of waist=W/2+3.5cm, dart amount=8cm. Dart distributions were 23%(B.P.) : 20%(front armpit) : 17%(side seam) : 18%(back armpit) : 15%(back protruded point) : 7% (center back line). Through wearing test using 5-point Likert scale, resultant pattern was evaluated as appropriate for elderly women's pattern to get over 4 point. As a result, it might be said that 3D scanning application is effective for elderly women in that it doesn't take time so much as Martin's anthropometry and that their body shape vary compared with those of young women.

    Pattern Selection Using the Bias and Variance of Ensemble (앙상블의 편기와 분산을 이용한 패턴 선택)

    • Shin, Hyunjung;Cho, Sungzoon
      • Journal of Korean Institute of Industrial Engineers
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      • v.28 no.1
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      • pp.112-127
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      • 2002
    • A useful pattern is a pattern that contributes much to learning. For a classification problem those patterns near the class boundary surfaces carry more information to the classifier. For a regression problem the ones near the estimated surface carry more information. In both cases, the usefulness is defined only for those patterns either without error or with negligible error. Using only the useful patterns gives several benefits. First, computational complexity in memory and time for learning is decreased. Second, overfitting is avoided even when the learner is over-sized. Third, learning results in more stable learners. In this paper, we propose a pattern 'utility index' that measures the utility of an individual pattern. The utility index is based on the bias and variance of a pattern trained by a network ensemble. In classification, the pattern with a low bias and a high variance gets a high score. In regression, on the other hand, the one with a low bias and a low variance gets a high score. Based on the distribution of the utility index, the original training set is divided into a high-score group and a low-score group. Only the high-score group is then used for training. The proposed method is tested on synthetic and real-world benchmark datasets. The proposed approach gives a better or at least similar performance.

    Analysis of EFCI and ER Switches Algorithm for ABR Traffic, Using Self-similar pattern and Poisson pattern (Self-similar 패턴과 Poisson 패턴을 사용한 EFCI와 ER 스위치 알고리즘의 ABR 트래픽 분석)

    • 이동철;박기식;김탁근;손준영;김동일;최삼길
      • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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      • 2000.05a
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      • pp.296-300
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      • 2000
    • In previous papers, it proved relevant to using together with EFCI and ER switch for effective ABR traffic managements. It also applied to EFCI and ER switch algorithm, that consider ABR traffic as poisson pattern. However, in recently network environment, it has been proved about traffic pattern, that is similar to self-similar pattern than poisson pattern. In this paper, we will compare previous poisson pattern with self-similar pattern under ATM network.

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    Conceptual Pattern Matching of Time Series Data using Hidden Markov Model (은닉 마코프 모델을 이용한 시계열 데이터의 의미기반 패턴 매칭)

    • Cho, Young-Hee;Jeon, Jin-Ho;Lee, Gye-Sung
      • The Journal of the Korea Contents Association
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      • v.8 no.5
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      • pp.44-51
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      • 2008
    • Pattern matching and pattern searching in time series data have been active issues in a number of disciplines. This paper suggests a novel pattern matching technology which can be used in the field of stock market analysis as well as in forecasting stock market trend. First, we define conceptual patterns, and extract data forming each pattern from given time series, and then generate learning model using Hidden Markov Model. The results show that the context-based pattern matching makes the matching more accountable and the method would be effectively used in real world applications. This is because the pattern for new data sequence carries not only the matching itself but also a given context in which the data implies.


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