NONLINEAR ELASTICITY OF BLOOD ARTERIAL DUCT

The paper deals with nonlinear elasticity of blood arterial duct, in which the artery is modeled to bea locally triclinic, transverse isotropic, incorapressible, axisymmetric and thickwalled tube with large deformations, The nonlinear coustitutive relationship of arterial tissues is based on the theorv of Green and Adkins. A nonlinear strain energy density function is introduced for nonlinear stress-strain relationship of second order, in which the coefficient of each term is expressed by means of a Lame’s constant, The elasticity constants are nqcessary to describe such a uonlinear finite strain etastieity of the second order, These constants are determined by means of the stress-strain increment theory.     

NONCONTACT MEASUREMENT OF ULTRASONIC VELOCITY IN LIQUID USING PULSED PHOTOACOUSTIC TECHNIQUE

Based on the theory of the pulsed photoacoustic signal in liquid generated by a pulsed laser, a novel, optically noncontact, fast and accurate method for temperature-dependent ultrasonic velocities for ethanol and water has been demonstrated. The experiment results are in good agreement with literature values.     

LASER INDUCED THERMAL LENS EFFECT

The thermal lens effect has emerged in recent years as a novel, highly sensitive tool for the study of the very weak molecular absorption of light energy. This paper discusses the theory and technique of the thermal lens measurement. Some applications of the thermal lens measurement are described. A mode-mismatched dual-beam thermal lens experimental arrangement with a modulated probe beam, designed by the authors, for trace analysis is presented, and its detection limit was found to be 4.1×10~(-7) for Cu(Ⅱ)in ethanol and 80 mW excitation power.     

压电检测凝聚态物质光声信号的理论分析

本文基于热弹性理论推导了凝聚态介质中光声效应的基本方程。在某些有实际意义的条件下给出了光声信号的简化表达式。对采用脉冲光(或强度调制光)作为激励源的情况下,得出了一般解,并讨论了某些可以忽略热扩散的特殊情况。     

Effect of Quantum Biology of Benzene

The purpose of the paper is to elucidate the biological effect of benzene on the basis of benzene constitution, quantum chemistry and quantum biology. In addition, we also have examined the toxicological mechanism of benzene in view of action of benzene on energy.