对狭缝管道水流边壁影响的实验研究

本文从两个无限宽平行平板体系的基本方程出发,估算了宽高比很大的狭缝流道的边壁存在对流动基本参量的影响,又用激光测速(LDA)的方法测量了这些参量。     

Activity increases quantal size at the frog neuromuscular junction

Summary Two h of nerve stimulation at 10 Hz or of elevated spontaneous release in hypertonic solution increased the size of miniature end-plate potentials (m.e.p.p.'s) and currents at the frog neuromuscular junction, probably by increasing the amount of acetylcholine in a quantum. Increases in quantal size may modulate synaptic transmission.Acknowledgments. Supported by grant 10320 from the NINCDS and by a grant from the MDA. We are grateful to Dr I.S. Cohen for participating in some of the experiments and for helpful criticism, and to Drs C. Clausen and G. Baldo for help with the computer. Some of the results were presented at a meeting of the Physiological Society.     

神经类固醇对高级脑功能作用的研究概述

神经类固醇是脑和神经自身合成的类固醇激素,广泛地存在于大脑及神经组织中,对学习、记忆、认知、情绪等脑功能具有非常重要的作用。本文对这方面的研究作一概述。     

Fiber-Based Chitosan Tubular Scaffolds for Soft Tissue Engineering： Fabrication and in Vitro Evaluation

Porous, two-ply tubular chitosan conduits for guided tissue regeneration were fabricated by combining the textile technique （inner layer） with the thermally induced phase separation process （outer layer）. A hollow chitosan tube was prepared using an industrial warp knitting process with chitosan yarns. Then, an appropriate diameter mandrel was inserted into the pre-fabricated tube. The tube and the mandrel were dipped into the chitosan solution together, taken out, and freeze-dried. After being neutralized in alkaline solution and dried at room temperature, the mandrel was removed to create the chitosan tubular scaffold. Scanning electron micrographs show that the resulting tubes have a biphasic wall structure, with a fibrous inner layer and a semipermeable outer layer. The swelling properties and the mechanical strength before and after in vitro degradation were investigated. The biocompatibility of the scaffolds was also investigated by co-culturing neuroblastoma cells （N2A, mouse） with the scaffolds. The results suggest that these chitosan tubular scaffolds are useful for the regeneration of tissues requiring a tubular scaffold.     

动眼神经损伤39例预后分析

目的观察动眼神经损伤的预后并探讨影响预后的因素。方法观察39例各类动眼神经损伤,分析动眼神经损伤的恢复时限及其预后的影响因素。结果39例病例中33例在4个月内好转或治愈,3例在4~12个月内好转,3例未愈。结论动眼神经损伤绝大多数能在4个月内治愈或好转。动眼神经受压时间和蛛网膜下腔出血是影响预后的主要因素。     

表面电极下的电触觉模型研究

通过建立神经纤维的电网络模型，对表面电极下的电触觉进行了模型研究，首先对建立的神经纤维的电网络模型进行分析得出激励函数，再分析表面电极下的电势分布，由此给出表面电极睛神经纤维所受的激励，最后通过实验所得结果进行验证。     

一种基于神经网络的地震信号去噪的处理方法

在众多的去噪处理方法中，Ｋ－Ｌ变换是去除随机噪声的有效方法．Ｋ－Ｌ变换是利用地震剖面各道在空间方向的相关性来取信号的共同特征，以实现去除剖面中的随机噪声．传统的Ｋ－Ｌ变换是通过矩阵的Ｈｏｕｓｈｏｌｄ变换实现的．其运算量及空间占用量比较大．笔者用一种Ｈｏｐ－ｆｉｅｌｄ网实现对地震剖面进行Ｋ－Ｌ变换的去噪处理，并且给出了该网络的详尽描述及稳定性证明．由于Ｈｏｐｆｉｅｌｄ网能实时进行处理，固而具有实时性．模拟实验的结果表明，这种方法对消除地震剖面的随机噪声是一种行之有效的方法．     

金顶铅锌矿形成的古水动力条件

金顶铅锌矿位于兰坪盆地中新生代复式向斜构造盆地中部。兰坪盆地可划分4个古水文地质期,其第4古水文地质期与成矿关系密切。含矿流体主要形成于沉积亚期和混合亚期的高盐度的热卤水溶液,并主要以矿区西部的沘江断裂和穹隆构造的张裂隙带为排泄通道和储矿空间。     

神经波方程

本文给出了神经波方程的闭理想解法并且讨论了它的孤立子解。