• Title/Summary/Keyword: Means

Search Result 31,936, Processing Time 0.056 seconds

Aesthetics of Ugliness Expressed on Contemporary Women's Hair Styles

  • Lee, Su-in;Park, Kil-Soon
    • The International Journal of Costume Culture
    • /
    • 제6권2호
    • /
    • pp.117-125
    • /
    • 2003
  • Aesthetics of ugliness enlarged aesthetic field and brought back the repressed, estranged things. Hair style is not an exception. So I intended to examine the contemporary(1995-2002) women's hair styles on the basis of Rosenkranz' concept of ugliness. The results are as follows: First, extrinsic aspect contains formlessness and disfiguration. Among characteristics of formlessness, discord means appearing on a stage with a hair style derailed from our common sense or an incomplete hair style. Asymmetry means hair decoration or hair dressing which violates the principles of design. Disharmony means excessiveness beyond the concept of accent. Disfiguration has characteristics of vulgarity, disgust and caricature, and means cruelty, grimness or ridiculousness instead of pleasing beauty. Second, intrinsic aspect has incorrectness. As minority ethnic groups, estranged classes, children and women which in the previous field of absolute aesthetics were never considered as beauty appeared as subject matters of hair styles, the repressed things returned and a new genre was created thereby enlarging true aesthetic field. Like this, 1 cloud confirm that aesthetics of ugliness organized today's characteristic, peculiar hair styles, and enlarged aesthetic field.

  • PDF

초기 반복학습 시 수렴영역을 벗어난 가중치에 의한 K-means 알고리즘 (K-means Algorithm in outside weight region of convergence for initial iteration learning)

  • 박소희;조제황
    • 한국음향학회:학술대회논문집
    • /
    • 한국음향학회 2001년도 추계학술발표대회 논문집 제20권 2호
    • /
    • pp.143-146
    • /
    • 2001
  • 본 논문에서는 랜덤초기화 방법을 사용하여 초기 코드북을 생성하고, 이를 이용하여 초기 반복학습 시 수렴영역을 벗어난 2 이상의 가중치에 의한 K-means 알고리즘을 제안한다. 기존의 K-means 알고리즘이 국부적으로 최적화되고 초기 반복학습 시에 가중치의 영향이 크다는 점을 이용하여, 제안된 방법에서는 초기 반복학습 시의 가중치를 수렴영역에서 벗어난 큰 값으로 주고 이후 반복학습시의 가증치는 수렴영역 안에 있는 값으로 고정하여 코드북을 설계한다. 또한 초기 코드북을 얻기 위해 Splitting 방법과 같은 추가적인 과정 없이 랜덤한 방법에 의한 초기 코드북을 적용함으로써 제안된 알고리즘이 단순한 구조를 가지며, 구해진 코드북의 성능도 우수함을 확인할 수 있었다.

  • PDF

Metric and Spectral Geometric Means on Symmetric Cones

  • Lee, Hosoo;Lim, Yongdo
    • Kyungpook Mathematical Journal
    • /
    • 제47권1호
    • /
    • pp.133-150
    • /
    • 2007
  • In a development of efficient primal-dual interior-points algorithms for self-scaled convex programming problems, one of the important properties of such cones is the existence and uniqueness of "scaling points". In this paper through the identification of scaling points with the notion of "(metric) geometric means" on symmetric cones, we extend several well-known matrix inequalities (the classical L$\ddot{o}$wner-Heinz inequality, Ando inequality, Jensen inequality, Furuta inequality) to symmetric cones. We also develop a theory of spectral geometric means on symmetric cones which has recently appeared in matrix theory and in the linear monotone complementarity problem for domains associated to symmetric cones. We derive Nesterov-Todd inequality using the spectral property of spectral geometric means on symmetric cones.

  • PDF

On Combining MOS and Histogram in a Subjective Evaluation Method

  • Sehyug Kwon
    • Communications for Statistical Applications and Methods
    • /
    • 제2권2호
    • /
    • pp.176-183
    • /
    • 1995
  • Mean opinion score (MOS) method has been used in many areas to quantify opinions of respondents not only in survey research but in evaluating the parameters of population that are not measurable of are technically hard to be measured. Histogram is an important graphical technique because of the role it plays in describing categorical data as well as quantitative. In MOS method, subjective opinions of respondents are quantified by opinion scores and the arithmetic means of opinion scores have been used to describe the interesting population. Since opinion scores are polytomous, the values of arithmetic means have little meanings. In this paper, cumulative percentage curves as a function of the means of opinion scores are derived by combining means of opinion scores and histograms. It is proposed for better interpretation to opinion scores in MOS method, one of subjective evaluation methods.

  • PDF

Projection Pursuit K-Means Visual Clustering

  • Kim, Mi-Kyung;Huh, Myung-Hoe
    • Journal of the Korean Statistical Society
    • /
    • 제31권4호
    • /
    • pp.519-532
    • /
    • 2002
  • K-means clustering is a well-known partitioning method of multivariate observations. Recently, the method is implemented broadly in data mining softwares due to its computational efficiency in handling large data sets. However, it does not yield a suitable visual display of multivariate observations that is important especially in exploratory stage of data analysis. The aim of this study is to develop a K-means clustering method that enables visual display of multivariate observations in a low-dimensional space, for which the projection pursuit method is adopted. We propose a computationally inexpensive and reliable algorithm and provide two numerical examples.

K-means 클러스터링을 이용한 불변 방향 검출 (Detection of an Invariant Direction using K-means Clustering)

  • 김달현;이우람;전병민
    • 한국산학기술학회:학술대회논문집
    • /
    • 한국산학기술학회 2011년도 춘계학술논문집 1부
    • /
    • pp.389-392
    • /
    • 2011
  • 본 논문에서는 영상의 색 항등성을 달성하기 위해 본질 영상의 핵심인 불변 방향을 K-means 클러스터링을 이용해 검출하는 개선된 알고리즘을 제안한다. 우선, RGB 영상을 K-means 클러스터링 기법에 의해 다수의 클러스터로 분할한다. 이 때, 클러스터 간의 거리 측정은 유클리드 거리이다. 그리고 분할된 클러스터 중 가장 많은 색을 가진 클러스터만을 x-색도 공간으로 도시하여 해당되는 후보 불변 방향을 계산한다. 검출된 후보 불변 방향은 방향별로 프로젝션된 히스토그램에서 3개 이상의 프로젝션된 데이터를 가진 bin들의 개수가 가장 적은 방향이다. 그 후, 분할된 다른 여러 클러스터에 해당되는 후 보 불변 방향을 계산하여 가장 많은 빈도로 나타나는 방향을 영상의 최종 불변 방향으로 결정한다. 실험에서 Ebner에 의해 제안된 데이터집합을 실험 영상으로 사용하였고, 색항등성 측도를 평가 척도로 사용하였다. 실험 결과, 제안한 기법은 형광성 표면을 가진 형광 데이터집합에 보다 적합하였으며, 엔트로피 기법보다 색항등성이 1.5배 이상 높았다.

  • PDF

개선된 퍼지 C-means 기법을 이용한 타원추출 알고리즘 (Ellipse Fitting Algorithm using Improved fuzzy C-means Method)

  • 이중재;김계영;최형일
    • 한국정보과학회:학술대회논문집
    • /
    • 한국정보과학회 2002년도 가을 학술발표논문집 Vol.29 No.2 (2)
    • /
    • pp.598-600
    • /
    • 2002
  • 영상에서 타원을 추출하는 것은 얼굴 인식, 홍채 인식과 같은 컴퓨터 비전분야에서 인식할 영역을 찾는 방법으로 상당히 유용하게 사용된다. 본 논문에서는 기존의 퍼지 C-means 기법이 초기의 클러스터 개수와 중심 값에 따라서 결과가 민감하다는 단점을 보완한 개선된 퍼지 C-means 기법을 타원 추출에 적용한다. 이것은 영상 분할(Segmentation)로부터 후보 초기 클러스터 개수 및 초기 클러스터 중심을 결정하는 방법으로서 본 논문에서는 이 기법으로 영상 클러스터링을 수행하여 타원 영역 추출에 필요한 타원 후보 영역의 최소 인접 사각형(Minimum Enclosed Rectangle)을 찾아낸다. 이렇게 찾아진 최소 인접 사각형에 대해서 면적에 맞는 초기 타원들을 영역 내에 설정한 뒤 적합도(fittness)검사를 기반으로 한 타원 검증을 실시하고 적합도가 높은 영역을 타원 영역으로 추출한다.

  • PDF

Bayesian Hypothesis Testing for the Ratio of Means in Exponential Distributions

  • 강상길;김달호;이우동
    • 한국데이터정보과학회:학술대회논문집
    • /
    • 한국데이터정보과학회 2006년도 추계 학술발표회 논문집
    • /
    • pp.205-213
    • /
    • 2006
  • This paper considers testing for the ratio of two exponential means. We propose a solution based on a Bayesian decision rule to this problem in which no subjective input is considered. The criterion for testing is the Bayesian reference criterion (Bernardo, 1999). We derive the Bayesian reference criterion for testing the ratio of two exponential means. Simulation study and a real data example are provided.

  • PDF

Assessment of Premature Ventricular Contraction Arrhythmia by K-means Clustering Algorithm

  • Kim, Kyeong-Seop
    • 한국컴퓨터정보학회논문지
    • /
    • 제22권5호
    • /
    • pp.65-72
    • /
    • 2017
  • Premature Ventricular Contraction(PVC) arrhythmia is most common abnormal-heart rhythm that may increase mortal risk of a cardiac patient. Thus, it is very important issue to identify the specular portraits of PVC pattern especially from the patient. In this paper, we propose a new method to extract the characteristics of PVC pattern by applying K-means machine learning algorithm on Heart Rate Variability depicted in Poinecare plot. For the quantitative analysis to distinguish the trend of cluster patterns between normal sinus rhythm and PVC beat, the Euclidean distance measure was sought between the clusters. Experimental simulations on MIT-BIH arrhythmia database draw the fact that the distance measure on the cluster is valid for differentiating the pattern-traits of PVC beats. Therefore, we proposed a method that can offer the simple remedy to identify the attributes of PVC beats in terms of K-means clusters especially in the long-period Electrocardiogram(ECG).

The Design of Fuzzy Controller by Means of Genetic Optimization and Estimation Algorithms

  • Oh, Sung-Kwun;Rho, Seok-Beom
    • KIEE International Transaction on Systems and Control
    • /
    • 제12D권1호
    • /
    • pp.17-26
    • /
    • 2002
  • In this paper, a new design methodology of the fuzzy controller is presented. The performance of the fuzzy controller is sensitive to the variety of scaling factors. The design procedure is based on evolutionary computing (more specifically, a genetic algorithm) and estimation algorithm to adjust and estimate scaling factors respectively. The tuning of the soiling factors of the fuzzy controller is essential to the entire optimization process. And then we estimate scaling factors of the fuzzy controller by means of two types of estimation algorithms such as HCM (Hard C-Means) and Neuro-Fuzzy model[7]. The validity and effectiveness of the proposed estimation algorithm for the fuzzy controller are demonstrated by the inverted pendulum system.

  • PDF