基于Protégé的领域本体构建研究

介绍了领域本体构建的基本流程,目的是为了更好地服务于语义web以及搜索引擎等。主要内容包括本体的概念、分类、功能及本体构建的方法、语言和工具,并以Java领域本体库的构建为例详细阐述了本体的构建过程。     

Effect of Ce(3+) on soluble microbial products production in anaerobic granular sludge digestion

Upflow anaerobic sludge bed reactors fed on glucose were used to investigate the effects of Ce(3+) on soluble microbial products (SMP) production, which is the majority of the residual chemical oxygen demand present in the effluent. It was found that Ce(3+) concentration of 0.05 mg/L had no significant effect on the amount of SMP production, whereas that of 1 mg/L led to the increase in SMP production. The molecular-weight distribution and carbohydrate analysis indicated that an increase in SMP production may be partly attributed to the release of extracellular polymeric substances (EPS) into the bulk solution resulted from cerium toxicity, and the nucleic acids analysis suggested that increased cell lysis also contributed to SMP accumulation in the presence of Ce(3+). The increase in SMP production in the presence of Ce(3+) is possibly a consequence of the release of EPS and increased cell lysis due to cerium toxicity.     

A High-Precision Time Handling Library

An appropriate assessment of end-to-end network performance presumes highly efficient time tracking and measurement with precise time control of the stopping and resuming of program operation. In this paper, a novel approach to solving the problems of highly efficient and precise time measurements on PC-platforms and on ARM-architectures is proposed. A new unified High Performance Timer and a corresponding software library offer a unified interface to the known time counters and automatically identify the fastest and most reliable time source, available in the user space of a computing system. The research is focused on developing an approach of unified time acquisition from the PC hardware and accordingly substituting the common way of getting the time value through Linux system calls. The presented approach provides a much faster means of obtaining the time values with a nanosecond precision than by using conventional means. Moreover, it is capable of handling the sequential time value, precise sleep functions and process resuming. This ability means the reduction of wasting computer resources during the execution of a sleeping process from 100% （busy-wait） to 1-1.5%, whereas the benefits of very accurate process resuming times on long waits are maintained.     

An empirical molecular docking study of a di-iron binding protein with iron ions

Various molecular docking software packages are available for modeling interactions between small molecules and proteins.However,there have been few reports of modeling the interactions between metal ions and metalloproteins.In this study,the AutoDock package was employed to example docking into a di-iron binding protein,bacterioferritin.Each binding site of this protein was tested for docking with iron ions.Blind docking experiments showed that all docking conformations converged into two clusters,one for internal iron binding in sites within the metalloprotein and the other for external iron binding on the protein surface.Local docking experiments showed that there were significant differences between two internal iron binding sites.Docking at one site gave a reasonable root-mean-square deviation(RMSD) distribution with relatively low binding energy.Analysis of the binding mode quality for this site revealed that more than half of the docking conformations were categorized as having good binding geometry,while no good conformations were found for the other site.Further investigations indicated that coordinating water molecules contributed to the stability of binding geometries.This study provides an empirical approach towards the study of molecular docking in metalloproteins.     

视频监控技术在水利信息平台中的应用

主要介绍视频监控系统技术发展的历程。视频监控系统从最初的模拟监控系统到数字化监控系统,视频监控系统和通信技术借助网络功能使其应用更加方便。水利系统内视频监控技术的大量应用给防汛决策提供了直观的图像信息,提高了工作效率,推动了监控平台的功能整合信息共享的需求;亟待完善水利系统建设监控平台应有的标准规范。     

间接竞争ELISA方法用于脱落酸的检测

该文研制了植物激素脱落酸(ABA)间接竞争酶联免疫试剂盒,该试剂盒可对ABA进行快速检测.文中成功制备了脱落酸和牛血清蛋白的交联物(ABA-BSA),并对交联物的浓度、抗体稀释度、酶标二抗稀释度对实验的影响进行了考察.结果表明,该试剂盒具有高灵敏性,最低检出浓度为1.38 ng/mL,在10ns/mL～1 000 ng/mL之间,吸光度与浓度的对数呈良好的线性关系.样品添加回收率在95.98%～102.25%之间,平均回收率为100.18%,变异系数(CV)在1.27%～4.68%之间,平均变异系数为3.18%.     

基于MiniGUI的图像即时处理终端实现的关键技术

以现代嵌入式电子产品中图像处理终端为研究对象,本文对图像即时编辑功能进行了分析和设计。基于嵌入式ARM开发平台,使用MiniGUI嵌入式图形界面开发系统,最终实现一个可完成图像浏览、更新、标注以及利用二分聚类算法实现搜索功能的图形界面应用程序,实现了图像的即时处理,并提高了图像检索速度。     

基于超图模型的大规模门级网表层次化聚类算法

为了克服现有层次化方法通用性差、运算效率不高、电路结构提取不准等缺点,提出了一种基于超图模型的层次化聚类算法.首先对网表中最基本的迭代、总线、扇入和串联结构进行自动识别,然后将这4种基本结构按不同的组合方式进行多级聚类,最终建立起了网表的层次化结构.由于文中基本结构聚类算法是专门针对超图数据结构设计的,其时间复杂度较低.实验结果表明,该算法既可以得到较准确的层次信息,又能保证较高的运算速度,对各种应用均有较好的效果.