Constrained oscillation of a bubble subjected to shock wave in microvessel

A three-phase coupled model of the gas–liquid–solid oscillation system is established to analyze the oscillation characteristics of a bubble inside a micro blood vessel with various radii and its shape changes with different interface boundaries. The results show that unlike the spherical symmetric oscillation in an unbounded fluid, the oscillating bubble has significant asymmetric characteristics under the constraint of a flexible microvessel, especially while its radius reduces to the same order of magnitude as that of the bubble. Moreover, the variation of microbubble motion, whether the geometric shape or oscillation feature, exhibits obvious differences in the micro blood vessel compared with the rigid wall. The reasons behind these phenomena are analyzed in this paper. The conclusions have significant importance in the understanding of the mechanism of microvessel injury in ultrasound therapy.     

计算机监控系统在中波台的应用

本文研究了中波发射台计算机实时控制系统的实施方案,具体提出了中波发射台发射机自动控制的设计原则、组成功能、结构特点.     

Kadomtesv-Petviashvili方程的新解

利用符号计算法和F-展开法,得到Kadomtesv-Petviashvili的新的孤波解和周期波解,包括双曲函数解和三角函数解.而这些解可以广泛的应用到诸如物理等其它科研领域.     

有压块海底管线水动力特性的实验研究

本文通过模型实验研究了在接近海底平面的波浪场作用下 ,加有压块的水平管的动力载荷 .在 Re=3× 10 3～ 2× 10 4 ,Kc=0 .5～ 15的范围内 ,测量了加有压块的水平管和压块本身的阻力和升力 .采用波面拟合法选取合理的波浪理论 ,本文使用 Stokes II阶波理论确定波浪场的速度和加速度 .     

等离子体波动方程的摄动分析

分析了热等离子体中离子声孤子存在及传播的力学机制，并根据远方场简单波理论，采用摄动方法推导出了KdV方程。     

波函数的连续性

讨论了波函数的连续性 ,同时提出了一些关于波函数连续性的新的观点。     

Morpho-sedimentary unit signatures associated with micro-estuaries in Barnegat Bay national estuary, New Jersey, the USA

Incorporation of the Barnegat Bay into the US National Estuary Program has triggered collection and collation of basic data sets appropriate to estuarine management. Gathering of water quality and quantity as well as basic geological data is adding to the knowledge of the complexity of the bay. An ongoing program of systematic sampling of bottom sediments in the large bay and intense sampling in the many micro-estuaries along the mainland margin is demonstrating the presence of localized mor-pho-sedimentological units related to the interaction of the fluvial, tidal, and wave processes active in the bay. Mean grain sizes and standard deviation measures assist in the development of signatures of bottom sediment types.     

封闭的FRW宇宙的量子隧道创生

采用正则量子化及WKB近似方法，讨论了在宇宙的极早期，一个封闭的FRW宇宙通过量子隧道效应过程如何从无产生，并且计算出了这各量子创生的几率。     

动态脉搏波阻抗谱理论分析与初步实验

动态脉搏波阻抗包含了人体重要的生理病理信息，但由于其测量容易受到测量条件和个体差异的影响，测量精度难以提高，严重限制了在临床上的应用．为了实现高精度动态脉搏波阻抗的测量，从理论上分析了影响动态脉搏波阻抗的各种因素，提出了动态脉搏波阻抗谱的方法，有效地抑制了个体差异对阻抗测量的影响．对实验对象的手臂进行了测量，得到了不同测量电极间距下的脉搏波阻抗谱．实验结果表明，采用归一化的动态脉搏波阻抗谱。可以在较大程度上消除和抑制个体差异以及测量电极位置对人体阻抗测量的影响，能够实现脉搏波阻抗特性较高精度的无创检测．