野木瓜注射液对爪蟾坐骨神经传导的影响

野木瓜注射液（Ｉｎｊｅｃｔｉｏｎｓｔａｕｎｔｏｎｉａｅ，ＩＳ）涂布于脊爪蟾（ＸｅｎｏｐｕｓＬａｅｖｉｓ）坐骨神经４ｍｍ长的一段上．电刺激跗部皮肤，记录半膜肌肌电．１０％ＩＳ使肌电的潜伏期和问期分别延长（１．５１±１．１５）ｍｓ和（２６．６±１６．１）ｍｓ（Ｐ＜０．０１，ｎ＝９）；５０％ＩＳ则使潜伏期延长（２．８４±２．１８）ｍｓ和幅度下降到原来的０．２１±０．２６（Ｐ＜０．０１，ｎ＝７）．ＩＳ对神经传导的阻滞作用是量效关系，给药８ｍｉｎ后电刺激坐骨神经干能使已受５０％ＩＳ影响而刺激跗部皮肤几乎不再引起肌电的半膜肌产生同对照一样的肌电．这表明在给药期内５０％ＩＳ主要阻滞传入纤维的传导，而不影响传出纤维的功能．     

利用Mahalanobis距离进行人脸表情的识别

提出了利用Mahalanobis距离进行人脸表情识别的方法.首先将待分类的图像样本集进行坐标变换,使得变换以后类间离散度尽可能大而类内离散度尽可能小,即使变换以后的Fisher准则函数取得极大值,在新的坐标下求每个待分类样本到各类均值向量的Mahalanobis距离,从而将待分类的样本归到Mahalanobis距离最小的类中去,通过实验得到了平均80.25%的识别率.     

神经网络方法在胃收缩识别中的应用

胃收缩运动在消化过程中起着重要作用．传统的测量胃运动的方法是侵 袭性的．本文提出一种运用人工神经网络由体表胃电图（ｅｌｅｃｔｒｏｇａｓｔｒｏｇｒａｍ） 无损识别胃收缩运动的方法．以５个受试者的胃电图作为训练集，另５个受试 者的胃电图作为测试集．以同时检测的与每段胃电图对应的胃腔内压力记录 作为评价标准，运用经过优化的具有单个隐层的反向传播神经网络，以分段 后的每段胃电图的时－频表征作为网络的输入，实验结果表明：识别胃运动静 止期的准确度达９０呢，识别收缩运动期的准确度达９４％．     

一维PSD背景光补偿的研究

分析了PSD的背景光非线性成因,并根据PSD的背景光非线性特点,提出了用神经网络的BP算法对PSD的背景光非线性进行了补偿,从而使PSD的背景光非线性获得了与线性近似的线性度．计算机仿真表明,该方法能有效地消除背景光的影响,在神经网络的输出端得到期望的线性输出．     

Neuronal plasticity and regeneration in the olfactory system of mammals: morphological and functional recovery following olfactory bulb deafferentation

The mammalian olfactory system has the unique property in the permanent turnover of the olfactory sensory neurons under normal conditions and following injury. This implies that the topographical map of the epithelium-to-bulb connections generated during ontogenesis has to be maintained despite neuron renewal in order to insure olfactory information processing. One way to investigate this issue has been to disrupt the peripheral connections and analyze how neural connections may be reestablished as well as how animals may perform in olfactory-mediated tasks. This review surveys the main data pertaining to both morphological and functional recoveries taking place in the peripheral olfactory system following olfactory bulb deafferentation. Conclusions from these studies are enlightened by recent data from molecular biology.     

Biocompatibility studies of silk fibroin-based artificial nerve grafts in vitro and in vivo

Silk fibroin(SF)has been used extensively in the biomedical field including tissue engineering for the generation of artificial bones,skins or ligaments.We have previously reported on good in vitro biocompatibility of SF fibers with peripheral nerve tissues and cells.In the present study,we developed a novel design of the SF-based artificial nerve graft(SF graft)which was composed of a SF-nerve guidance conduit(NGC)inserted with SF fibers.MTT assay was performed to determine the cytotoxicity of the SF-NGC extract fluid on the cultured L929 cells derived from an immortalized mouse fibroblast cell line.In addition,this SF graft was implanted into adult rats for bridging a 10-mm long sciatic nerve defect.The following-up experiments at initial stage(1-4 week)of nerve regeneration including routine blood tests and histochemical investigation were conducted to evaluate the in vivo biocompatibility of the SF graft with peripheral nerves.The results demonstrated that the SF-NGC graft was biocompatible with the surrounding tissues and cells due to its low inflammatory potential with a grade 0 under the U.S.Pharmacopeia guidelines and it was generally suitable to a certain degree for bridging peripheral nerve defects in virtue of supporting Schwann cell adherence,expansion and migration.Therefore the SF graft is a promising alternative to classical autografts for peripheral nerve repair.     

EPQ量表与哈萨克族大学生的神经类型特征

运用EPQ量表对哈萨克族大学生的神经类型进行测量评价研究,为探讨少数民族身心健康和神经类型特征提供科学的理论参考;为推动各民族传统体育项目的发展提出参照的心理统计量指标数据.     

一类集合等式成立的充分必要条件

运用凸集的面的结构理论, 给出了优化理论象空间法中的一类集合等式成立的两类充分必要条件.     

根据神经类型测定综合心理运动能力的实验分析

大脑神经细胞的结构和功能是影响综合心理运动能力的重要因素.掌握按照神经类型测定综合心理运动能力的方法,对运动选材、教学训练、运动竞赛等方面有着重要意义.     

电力线载波通讯火灾报警网络系统的研究开发

研究开发一种以电力线载波通讯为基础的新型火灾报警网络系统，对网络系统结构、网络协议、逻辑组件和传输方式进行优化设计，分析了主要干扰因素对系统可靠性的影响以及技术对策。