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Article type: Cover
1998 Volume 10 Issue 2 Pages
Cover1-
Published: October 30, 1998
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Article type: Cover
1998 Volume 10 Issue 2 Pages
Cover2-
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Article type: Appendix
1998 Volume 10 Issue 2 Pages
App1-
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Article type: Index
1998 Volume 10 Issue 2 Pages
i-
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Article type: Index
1998 Volume 10 Issue 2 Pages
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Zhong Zhang, Hiroaki Kawabata
Article type: Article
1998 Volume 10 Issue 2 Pages
93-101
Published: October 30, 1998
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Wavelet transform is a well-known and remarkable way of time-frequency analysis and it is used in various fields. Although an important problem in wavelet transform is how to select mother wavelet, the unified selection of mother wavelet is not yet realized at present. In this paper, we classify a mother wavelet into the complex type and the real type. The real type component is further divided into a symmetric type, an skew-symmetric type and an asymmetric type by the symmetric property of the function. The properties of so classified mother wavelets are examined by a reference signal. The selection and applicability of each mother wavelet are also examined, and it is found that the complex type mother wavelet is most efficient for time-frequency analysis.
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Hideyuki Douke
Article type: Article
1998 Volume 10 Issue 2 Pages
103-113
Published: October 30, 1998
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Group sequential procedure is to test sequentially the hypothesis of difference between two treatments based on group observations in clinical trials when the response is the normal variable. In some clinical trials, it is more preferable that we deal with p responses at a time rather than only one response to evaluate the effect of a treatment. In order to carry out the group sequential test based on multivariate observations, we can consider to use X^2 statistic or Hotelling's T^2 statistic. However the statistics have a quadratic form, we can not directly examine the contribution of some responses in p responses. We assume in this study that the p response vector on each of two treatments has a multivariate normal distribution, then we can derive the group sequential procedures which test the existence of the contribution of some responses in p responses based on the difference of two population mean vectors. For incorporating the group sequential test, we propose a group sequential T^2 statistic by applying T^2 statistic discussed in Rao's additional information test (1952). Furthermore, we propose another modified group sequential T^2 statistic by extending Jennison and Turnbull's method (1991) in order to realize the group sequential test where the average sample size is reduced. After the repeated confidence boundaries are decided by each of the two group sequential T^2 statistics, we will compare two group sequential procedures based on two T^2 statistics regarding the average sample size and the power of the test.
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Hiroshi Yadohisa, Akinobu Takeuchi, Koichi Inaba
Article type: Article
1998 Volume 10 Issue 2 Pages
115-125
Published: October 30, 1998
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In this paper, we propose a new measure of space distortion, which has been introduced by Lance & Williams (1967), in combinatorial cluster analysis. In particular, our measure is defined for each clustering process, not only for the clustering method. This means that the measure depends both on the method and on the data. Since the space distortion is measured as a numerical value, it makes easy to select the method in the actual application. Furthermore, a new combinatorial clustering method which can control the space distortion is proposed by using our measure. The validity of the new methods is discussed by analyzing the numerical example.
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Chiyuki Shiota
Article type: Article
1998 Volume 10 Issue 2 Pages
127-144
Published: October 30, 1998
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Data mining has been successful because of the users'needs to get useful knowledge from large database in computers and the tremendous progress of computing power. Although the era of trial use is over and users are getting good results, it is still hard to figure the whole picture of data mining because of the wide range of its applications. This paper covers the current status of data mining mainly in the viewpoint of business application. In this paper, at first we point out the importance of overall process of data mining to get useful knowledge from vast amount of data. Then we review some techniques of common use, and overview the difference between statistical analysis and data mining. We also refer to some guidelines for selecting software packages, some application cases, challenges for data mining and future directions.
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Yuichi Mori, Yoshiro Yamamoto, Shingo Watadani, Yoshimasa Odaka, Tomoy ...
Article type: Article
1998 Volume 10 Issue 2 Pages
145-153
Published: October 30, 1998
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Katsumi Ujiie
Article type: Article
1998 Volume 10 Issue 2 Pages
154-
Published: October 30, 1998
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[in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
154-
Published: October 30, 1998
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[in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
154-
Published: October 30, 1998
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[in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
154-
Published: October 30, 1998
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[in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
154-155
Published: October 30, 1998
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[in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
155-
Published: October 30, 1998
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
1998 Volume 10 Issue 2 Pages
155-
Published: October 30, 1998
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[in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
155-
Published: October 30, 1998
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[in Japanese], [in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
155-
Published: October 30, 1998
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[in Japanese], [in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
155-156
Published: October 30, 1998
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[in Japanese], [in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
156-
Published: October 30, 1998
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[in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
156-
Published: October 30, 1998
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[in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
156-
Published: October 30, 1998
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[in Japanese], [in Japanese], [in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
156-
Published: October 30, 1998
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[in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
156-157
Published: October 30, 1998
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[in Japanese], [in Japanese], [in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
157-
Published: October 30, 1998
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[in Japanese], [in Japanese], [in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
157-
Published: October 30, 1998
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[in Japanese], [in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
157-
Published: October 30, 1998
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[in Japanese], [in Japanese], [in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
157-
Published: October 30, 1998
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[in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
158-
Published: October 30, 1998
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[in Japanese], [in Japanese], [in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
158-
Published: October 30, 1998
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[in Japanese], [in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
158-
Published: October 30, 1998
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[in Japanese], [in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
158-
Published: October 30, 1998
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
158-159
Published: October 30, 1998
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[in Japanese], [in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
159-
Published: October 30, 1998
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[in Japanese], [in Japanese], [in Japanese]
Article type: Article
1998 Volume 10 Issue 2 Pages
159-
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Article type: Appendix
1998 Volume 10 Issue 2 Pages
160-
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Article type: Bibliography
1998 Volume 10 Issue 2 Pages
161-162
Published: October 30, 1998
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Takao Shohoji
Article type: Article
1998 Volume 10 Issue 2 Pages
163-165
Published: October 30, 1998
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Yutaka Kano
Article type: Article
1998 Volume 10 Issue 2 Pages
166-167
Published: October 30, 1998
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Article type: Index
1998 Volume 10 Issue 2 Pages
168-173
Published: October 30, 1998
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Article type: Appendix
1998 Volume 10 Issue 2 Pages
174-
Published: October 30, 1998
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Article type: Appendix
1998 Volume 10 Issue 2 Pages
175-
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Article type: Appendix
1998 Volume 10 Issue 2 Pages
176-
Published: October 30, 1998
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Article type: Appendix
1998 Volume 10 Issue 2 Pages
App2-
Published: October 30, 1998
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Article type: Cover
1998 Volume 10 Issue 2 Pages
Cover3-
Published: October 30, 1998
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Article type: Cover
1998 Volume 10 Issue 2 Pages
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