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NOVEL METHOD SOLVING NUMERICAL INSTABILITIES IN TOPOLOGY OPTIMIZATION

Chinese Journal of Mechanical Engineering 2002年第1期15卷 22-26页

作者： Guo Dongming Wang Xiaoming Liu Zhenyu Department of Mechanical Engineering，Dalian University of Technology， Dalian 116023，China Department of Mechanical Engineering Dalian University of Technology Dalian 116023 China

Numerical instabilities are often encountered in FE solution of continuumtopology optimization. The essence of the numerical instabilities is given from the inverse partialdifferential equation (PDE) point of view. On the basis of the strict mathematical theory, a novelmethod, named as window filter and multi-grid method, which solves the numerical instabilities, isproposed. Convergent analyses and a numerical example are presented.

关键词： Topology optimization gaussian windows Checkerboard pattern

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*** information for the recognition of 3D forms in humans

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Annals of Eye Science 2018年第1期 463-463页

作者： Lydia Hébert-Tremblay Martin Arguin Department of Psychologie Universitéde MontréalMontréalQCCanada Centre de recherche en neuropsychologie et cognition(CERNEC) MontréalQCCanada

Background:The perception of visual forms is crucial for effective interactions with our environment and for the recognition of visual ***,to determine the codes underlying this function is a fundamental theoretical objective in the study of the visual forms *** vast majority of research in the field is based on a hypothetico-deductive ***,we first begin by formulating a theory,then we make predictions and finally we conduct experimental *** decades of application of this approach,the field remains far from having a consensus as to the traits underlying the representation of visual *** goal is to determine,without theoretical a priori or any bias whatsoever,the information underlying the discrimination and recognition of 3D visual forms in normal human ***:To this end,the adaptive bubble technique developed by Wang et al.[2011]is applied on six 3D synthetic objects under varying views from one test to *** technique is based on the presentation of stimuli that are partially revealed through gaussian windows,the location of which is random and the number of which is established in such a way as to maintain an established performance ***,the experimental program uses participants’performance to determine the stimulus regions that participants use to recognize *** synthetic objects used in this study are unfamiliar and were generated from a program produced at *** Connor’s lab,Johns Hopkins University School of ***:The results were integrated across participants to establish regions of presented stimuli that determine the observers’ability to recognize them-i.e.,diagnostic *** results will be reported in graphical form with a Z scores mapping that will be superimposed on silhouettes of the objects presented during the *** mapping makes it possible to quantify the importance of the different regions on the visible surface of an object for its re

关键词： Recognition perception 3D visual forms gaussian windows

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