心脏与血管的相互影响

心脏与血管的相互影响早就引起生理学家们的兴趣,但其在临床医学上的广泛应用则是近几年的事．这主要归功于两大生物力学成就,一是应甩泵功能曲线和时变弹性元描述心脏功能,另一是应用输入阻抗来描述血管功能．本文系统地总结和评述了２０多年来国际上关于心脏与血管相互影响的研究发展概况．     

含夹杂复合材料宏观性能研究

本文综述并评价了有关含夹杂复合材料的有效弹性模量研究的代表性工作,包括自洽理论,微分法,Ｅｓｈｅｌｂｙ－Ｍｏｒｉ－Ｔａｎａｋａ法,Ｈａｓｈｉｎ和Ｓｈｔｒｉｋｍａｎ的变分法等。指出上述理论由于没有充分考虑复合材料内部的微结构特征,如夹杂的形状、几何尺寸、分布和夹杂间的相互影响,在夹杂的体积份数较大,如大于０．３时已不能有效地预报复合材料的有效弹性模量,随后介绍了近来才发展起来的一种新方法─—相关函数积分法,理论与实验的结果的比较表明,该方法在夹杂体积份数较大时仍然有效。     

充液层合压电圆柱壳的自由振动

推导得到轴向极化的圆柱型正交各向异性压电弹性力学的三维状态方程,采用细分近似方法,得到了状态方程的解,并建立了圆柱壳内外表面边界量之间的传递关系,分析了内充可压缩流体的层合压电圆柱壳的自由振动问题,给出了频率方程的精确形式,并作了具体计算。     

The solid-state interaction of organometallic aldehydes with 1,8-naphthylenediamine

Organometallic derivatives of 2,3-dihydroperimidine were obtained by the solid state interaction of ferrocene-, cymantrene-, and ruthenocenecarbaldehydes with 1,8-naphthylenediamine. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya. No. 1, pp. 145–146, January, 2000.     

Viscoelastic plate-fluid interactive vibration and liquid sloshing suppression

The viscoelastic plate-fluid interaction problem was studied. Forced vibration of the interactive system was investigated, and the equivalent mechanical models were obtained. The conclusion is that, for some case, the inner damping of the viscoelastic baffle will play a major role for liquid sloshing suppression. The project supported by National Natural Science Foundation of China and Astronautics Ministry.     

De spectric electroniorum secundariorum prorsus rectorum e corporibus solidis ioniis penetrantibus inductorum

Summary A short introduction into the phenomenon of kinetic ioninduced secondary electron emission from solids is given. The basic features of proton-induced secondary electron spectra from thin foils in forward-(beam-) direction are briefly discussed.

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Summarium Post brevem introductionem in phaenomenon emissionis cineticae electroniorum secundariorum ioniis inductae e corporibus solidis structurae praevalentes spectrorum energiae electroniorum secundariorum ex foliis tenibus protoniis inductorum prorsus rectorum, id est in directionem radii, proponuntur.

     

Digestive process of the raptorial feeder ciliate Litonotus lamella (Rabdophora, Litostomatea) visualized by fluorescence microscopy

In this paper we present a fluorescence microscopy investigation of the digestive process of Litonotus lamella, which we used as a prototype of the raptorial feeding behaviour. The sequence of its digestive processes, from the capture of the prey (Euplotes crassus) to the formation of digestive vacuoles was evidenced using Acridine Orange, a high quantum yield fluorescent vital probe which has a great affinity with the acid vesicle compartments. Acid vesicle localization and displacement during digestion consisted of the following phases: in starved Litonotus vesicles were localized in the neck of the ciliate; after the capture, they were displaced around the vacoule containing the prey in early digestiion, whereas in advanced digestion tens of digestive vacuoles containing Euplotes fragments were spread over the body of the predator; 1 h after capture, the digestive process was complete, and acid vesicles reorganized in the neck of the predator. The most important feature we observed was that the digestive process occurred not in the single phagosome as in filter feeder ciliates, such as Paramecium, but in many digestive vacuoles scattered all over the predator cytoplasm, which asynchronously digest prey fragments.     

A modal analysis for the dynamic response of fluid-structure systems

In this paper a theory of modal analysis for the dynamic response of fluid-structure systems is presented. A pair of generalized eigenvalue equations with three real symmetric matrices and their relationships are derived from the finite element equations in the form of structural displacements and fluid velocity potential. Generalized orthogonality relations of modal vectors are then developed. The response of the system to external excitation is derived in closed form by modal expansion. Two examples of the solution are given for illustration.