半环式传感型骨外固定器的力学特性实验

通过对尸胫骨 -传感器骨外固定器系统的动、静刚度及应力遮挡率进行了实验研究 ,表明半环四针传感型骨外固定器较两针型的刚度大 ,因此在骨愈合初期、粉碎性骨折宜采用四针结构 ,以避免错位、成角 ;愈合中后期用两针结构 ,以减小应力遮挡     

三峡二期围堰工程几个问题的研究及实践

三峡工程二期围堰是三峡工程最重要的临时建筑物之一，大江截流水深大，流量大；防渗墙深度大，工程量大，工期紧，且还要穿过各种复杂地层，通过试验，研究，采取有效地对策确保大江安全，顺利截流，基坑按三峡总工期目标要求抽干，检查渗漏量仅为设计估计量的1／10。     

光学系统自动设计中应用动态规划的个算法

本文用动态规划方法求解具有等式和不等式约束的光学系统的最优化问题,以Kuhn-Tucker条件为基础,利用牛顿迭代法提出最优决策的一个算法,并证明其局部收敛性。     

Millikan′s油滴实验数据处理透析

本文从误差传递的角度出发，代入合理的数据，来说明目前高校实验中对此内容的数据处理的问题所在以及应怎样采取措施解决。     

钻柱系统振动测试和分析

利用应变和压电测试系统以及随机信号和振动分析系统,在模型和试验钻机上,进行了钻柱系统的固有频率、响应、钻头的动态压力、功率谱和动态传递函数等测试分析。在横向振动支承条件,岩石的刚度以及动态碎岩机理等方面得到了一些有益的研究结果,并提出了岩石刚度动态测定法。以上研究为理论分析提供了依据。     

基于RBF网络的增量学习

提出了一种基于径向网络的增量学习算法 ,在对新样本进行学习时 ,通过恢复受干扰样本的方式来尽可能保持已有的知识不变 .模拟实验证明了本算法的正确性和有效性 .     

Application of the Constrained Predicated Nets and Interval Logic to Production Systems

1 .INTRODUCTIONDuetotheireconomicsignificanceandclosenesstopersons,productionsystemsmustbemodeledbeforetheirimplementationanduse,thus,amethodwhichspecifies ,analyzesandsynthesizestheproductionsys tems—discreteeventsystems (DES)hasbeenestab lishedanddevelopedstepbystepinrecentyears.DESmethodspecifiestheplantbasedonitsdiscretecharacters,however,intherealworld ,therearefewplantsthatcanbemodeledbypurelydiscretemathe maticalmodelbecausetherearealwayssomecontinu ousparametersforstudyinnearlya…     

从系统论看服务主导型数字图书馆的人员结构

将系统理论引入数字图书馆研究中 ,介绍了数字图书馆的人员结构系统以及各个子系统的特点 .阐述了各个子系统和系统环境与用户服务之间的相互关系以及如何利用这种关系来提高数字图书馆的服务     

虚拟现实与电子商务的结合探讨

提出了一种虚拟现实应用于电子商务的新方法,这种方法能对目前电子商务普遍性问题进行解决,但虚拟技术正处在发展阶段,本方法还有很大的改进空间.     

A rapid and accurate 3-(4,5-dimethyl thiazol-2-yl)-2,5-diphenyl tetrazolium bromide colorimetric assay for quantification of bacteriocins with nisin as an example

The objective of this study is to propose a more accurate and faster MTT [3-(4,5-dimethyl thiazol-2-yl)-2,5-diphenyl tetrazolium bromide] colorimetric assay (MCA) for quantitative measurement of polypeptide bacteriocins in solutions with nisin as an example. After an initial incubation of nisin and indicator bacterium Micrococcus luteus NCIB 8166 in tubes, MTT was added for another incubation period. After that, nisin was quantified by estimating the number of viable bacteria based on measuring the amount of purple formazan produced by cleavage of yellow tetrazolium salt MTT. Then MCA was compared to a standard agar diffusion assay (ADA). The results suggested a high correlation coefficient (r ²=0.975±0.004) between optical density (OD) and the inhibitory effect of nisin on a bacterial strain Micrococcus luteus NCIB 8166 at a range of 0.125~32 IU/ml. The MCA described in this study was very quick. Quantification of nisin took only 7~8 h and the detection limit was at the level of 0.125 IU/ml when compared to 12 IU/ml and 24~28 h for ADA. The MCA provides an accurate and rapid method for quantification of nisin in solutions and is expected to be used for quantification of other antimicrobial substances.