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Fundamental solutions for transversely isotropic magneto-electro-elastic media and boundary integral formulation

Science China(Technological Sciences) 2003年第6期46卷 607-619页

作者：丁皓江江爱民 Department of Civil Engineering Zhejiang University Hangzhou 310027 China West Branch of Zhejiang University of Technology Quzhou 324006 China

To obtain the fundamental solutions for computation of magneto-electro-elastic media by the boundary element method, the general solutions in the case of distinct eigenvalues are de-rived and expressed in five harmonic functions from the governing equations and the strict differ-ential operator theorem. On the basis of these general solutions, the fundamental solution of infi-nite magneto-electro-elastic solid are obtained with the method of trial-and-error. Finally, the boundary integral formulation.is derived and the corresponding boundary element method program is implemented to perform two numerical calculations(a column under uni-axial tension, uniform electric displacement or uniform magnetic induction, an annular plate simply-supported on outer and inner surfaces under axial loads). The numerical results agree well with the analytical ones.

关键词： transversely isotropic magneto-electro-elastic media, fundamental solution, boundary integral formulation.

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formulation.of X-ray phantom materials

引用

Chinese Science Bulletin 1995年第17期40卷 1486-1490页

作者：旷文峰林大全吴大诚 Chengdu Institute of Organic Chemistry. Chinese Academy of Sciences. Chengdu 610041 China) Sichuan Union University. Chengdu 610065. China

The X-ray phantom material (PM) is a kind of substitute materials of the tissues ofhuman or biological beings in radiology and application of atomic energy to investigatethe dosage effect. It is necessary for the PM to have nearly the same interaction results asthe tissue it simulated with X- or γ-ray. Since the 1960s, because of the wide use ofradiology and atomic science. this field has received much attention and become a brisk as-pect in biomedical engineering.

关键词： X-ray phantom material formulation.

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The formulation.of X-ray phantom materials

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Chinese Science Bulletin 1996年第1期41卷 25-29页

作者：旷文峰林大全吴大诚 Chengdu Institute of Organic Chemistry Chinese Academy of Sciences Chengdu 610041 China Sichuan Union University Chengdu 610065 China

The X-ray phantom material (PM) is a kind of substitute materials of tissues of human or other biological beings in the realms of radiology and application of atomic energy. The PM is required to exhibit nearly the same interaction results as the simulated tissue after being irradiated with X-ray or γ-ray. Since the 1960s, with the development of radiology and atomic science, PM has become a hot topic in biomedical engineering. Since the first application of PM in 1906, hundreds of PM have been developed to serve as substitutes for different kinds of tissues. However, in the formulation.of PM, al- though some guiding methods have already been put forward, PM are selected mainly by experiments up to now, because those methods either are not accurate enough, or lack operability or theoretical basis. This sets an obstacle to its development.

关键词： X-ray phantom material formulation.

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