nd κ q/ i UETANI Amethod is proposed 丘 〕r expressing reduced member dimensions ofan optimization problem . This method is based on mixture mode 旦丘}r probabilistic principal component analyzers fd 〕r feature extrac 口on of given member section list , whose parameter can be determined using an expectation ・ maximization algorithm . In this paper , a new efflcient method enables tO 丘nd an optimum set ofmember sections of the steel building 丘ames so that total weight would be minimum subject to co "

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... straints on interstory drifヒs under design spectrum ・ compatibie earthquakes .