以下为句子列表：
英文: Based on the Fresnel diffraction integral, the analytical expression for the field distribution of converging spherical waves passing through an annular aperture is derived and some special cases are discussed.
中文: 摘要基于菲涅耳衍射积分公式，推导出了会聚球面波通过环形光阑后场分布的解析公式，并讨论了一些特殊情况。
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英文: In this paper a kind of cardio-cerebral arterial bifurcation vessel hemodynamic characteristics are studied with the boundary element method,and the blood flowing velocity vector distributions have been calculated.In addition,the flow field distribution a
中文: 本文用边界元方法研究了一类典型心脑动脉分支血管中血液流动的流体动力特性,计算了分支血管血液流动的速度矢量分布,同时计算了分支附近有多个颗粒状绕流物时血液的流场分布,及颗粒物所受压力状况,给出了颗粒物的运动趋势,分析了引起粥样斑块病变、血瘤、血栓的可能原因.
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英文: The acoustic emission experiments of concrete under uniaxial tension loading in whole process are conducted arid the stochastic modeling theory is introduced to determine the random field distribution parameters of the limit fracture strain of the mesosco
中文: 利用混凝土单轴受拉破坏全过程的声发射实验数据，引入随机建模理论，确立了细观损伤单元的极限破坏应变随机场分布参数。
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英文: The magnetic leakage field distribution above linear defects of a tube sample under the geomagnetic field was modeled according to magnetic dipole theory.
中文: 摘要利用磁偶极子理论，建立稳恒微弱地磁场作用下管类试件线状缺陷段产生的漏磁场模型。
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英文: The theoretical analysis method is used to study the electro-thermally excited mechanism of silicon microcantilever beam so as to obtain the temperature field distribution under the electro-thermal excitation of the microcantilever beam and to deduce ther
中文: 摘要用理论分析方法研究了硅微悬臂梁的电热激振机理，得到了微机械悬臂梁电热激励下的温度场分布，并推导出了镀膜双层硅微悬臂梁的电热激励热力矩。
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