tailieunhanh - Báo cáo hóa học: " Research Article Advances in Modal Analysis Using a Robust and Multiscale Method"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Advances in Modal Analysis Using a Robust and Multiscale Method | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010 Article ID 392782 12 pages doi 2010 392782 Research Article Advances in Modal Analysis Using a Robust and Multiscale Method Cecile Picard 1 Christian Frisson 2 Francois Faure 3 George Drettakis 1 and Paul G. Kry4 1REVES INRIA BP 93 06902 Sophia Antipolis France 2TELELab Universite catholique de Louvain UCL 1348 Louvain-la-Neuve Belgium 3EVASION INRIA LJK Rhône-Alpes Grenoble France 4SOCS McGill University Montreal Canada H3A 2A7 Correspondence should be addressed to Cecile Picard Received 1 March 2010 Revised 29 June 2010 Accepted 18 October 2010 Academic Editor Xavier Serra Copyright 2010 Cecile Picard et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. This paper presents a new approach to modal synthesis for rendering sounds of virtual objects. We propose a generic method that preserves sound variety across the surface of an object at different scales of resolution and for a variety of complex geometries. The technique performs automatic voxelization of a surface model and automatic tuning of the parameters of hexahedral finite elements based on the distribution of material in each cell. The voxelization is performed using a sparse regular grid embedding of the object which permits the construction of plausible lower resolution approximations of the modal model. We can compute the audible impulse response of a variety of objects. Our solution is robust and can handle nonmanifold geometries that include both volumetric and surface parts. We present a system which allows us to manipulate and tune sounding objects in an appropriate way for games training simulations and other interactive virtual environments. 1. Introduction Our goal is to realistically model sounding .