DNA分子近邻互补链碱基的非线性效应

DNA分子近邻互补链碱基的非线性动力学效应研究，综述了Yomosa及Zhang模型，并在改进后的平面转子模型基础上，利用阶乘矩分析方法分析了平面转子模型的非线性效应，结果说明该模型更好的近似性．     

基于C／S和B／S混合模式的多媒体电子阅览室管理系统设计

高职院校多媒体电子阅览室是用户获取信息和学习的重要场所,如何能进一步完善和发展它需要有效的管理系统和具有更高素质的管理队伍。从网络化、一体化、多元化的理念出发,采用三层C/S和B/S两种混合模式,在用户管理,资源管理,安全管理三个方面展开论述,为现代多媒体电子阅览室提出了方便实用、安全有效的管理系统设计方案,以供大家探讨。     

云计算在高校校园网资源管理中的应用

校园网以云计算为核心架构,可以实现基础设施与实际应用的分离,解决校园网面临的资源共享、设备更新、管理统一等问题,促进教师的教学和科研工作,丰富学生的学习和生活,并为资源的存储和安全提供的保障。     

我国农村信息化平台建设架构研究

农村信息化建设是推进传统农业向现代农业演进的必要条件,探讨农村信息化平台建设架构有着重要的意义。综合分析了农村信息化建设的需求、存在的问题,提出了政府组织协调、运营商建设的农村信息化建设模式,设计了一体化的农村信息化平台建设架构。平台建设架构上分省、市、县三级部署,形成“四层级两保障”门户结构。综合平台体系结构灵活、部署方便,能有效地解决农村信息化数据采集、数据共享的困难,人机交互人性化程度不高,用户使用不便,缺乏持续发展的有效运营机制等问题。     

Arranging sensations: smell and taste in augmented and virtual reality

The development of digital taste and smell underscores the importance of cultural dimensions of bodily perception in augmented reality (AR) and virtual reality (VR) devices. This can be seen in Vocktail and Season Traveller, two digital devices incorporating taste and smell. Vocktail is an AR technology that augments the experience of drinking water, or even air, through the electrical stimulation of tastebuds and the manipulation of color and smell. Season Traveller is a VR game in which the user moves through four seasonal landscapes. It uses wind, odor, and temperature in addition to the more standard audio-visual displays. The cultural dimensions of these devices can be examined using phenomenological terms. They instigate perceptual circuits, and call on and create sedimented habits. Although VR and AR are often thought of in terms of their similitude to reality, understanding Vocktail and Season Traveller this way illustrates the world-creating dimension of multisensory devices. These technologies structure and shift thresholds of taste and smell, reworking past perceptual styles and habits to develop new perceptual experiences. In so doing, Season Traveller and Vocktail throw to the fore questions about the conditions according to which people exercise their senses in digitally dominated environments.     

从群体遗传的DNA线索看东乡族族源问题

DNA分析技术的发展为进行民族识别和分析民族起源、迁徙、流动、融合提供了新手段。本文在国内外首次应用D13S317基因座第 11号等位基因频率指标 ,计算了东乡族群体遗传动态数据。结果发现 ,东乡族和回族遗传距离很近 ,且东乡族中具有白种人血缘混杂。结合其他有关资料 ,我们认为东乡族的起源与元代蒙古军带来的中亚工匠、签军有关 ,亦与当地蒙古族、回族、藏族人群的融合有关。本文的研究结果可以为民族研究提供群体遗传方面的线索     

Retrospective change detection in categorical time series

The aim of this paper is to propose methods of detecting change in the coefficients of a multinomial logistic regression model for categorical time series offline. The alternatives to the null hypothesis of stationarity can be either the hypothesis that it is not true, or that there is a temporary change in the sequence. We use the efficient score vector of the partial likelihood function. This has several advantages. First, the alternative value of the parameter does not have to be estimated; hence, we have a procedure that has a simple structure with only one parameter estimation using all available observations. This is in contrast with the generalized likelihood ratio-based change point tests. The efficient score vector is used in various ways. As a vector, its components correspond to the different components of the multinomial logistic regression model’s parameter vector. Using its quadratic form a test can be defined, where the presence of a change in any or all parameters is tested for. If there are too many parameters one can test for any subset while treating the rest as nuisance parameters. Our motivating example is a DNA sequence of four categories, and our test result shows that in the published data the distribution of the four categories is not stationary.     

“人天价值观”的历史进路和现实应用

＂人天价值观念＂是现当代人们通过社会实践方式在推动社会发展的历史进程中形成的主流性价值观念。这一价值观念的形成不是一蹴而就的,其间经过了肯定、否定和否定之否定的三个历史过程。而当代被人们看好的＂天人合一＂式的人天价值观念,就是历史上形成的人天价值观念发展的最新形态。在科学发展观成为主导性话语的现阶段,在以人为本价值诉求成为主导性诉求的当下,弘扬陕西省人民＂DNA管理文化＂中所蕴涵的＂性命天道价值观念＂,对于目前的全面小康社会发展目标的实现和和谐社会、和谐人格的建构不无裨益。     

Tagged Probe Interval Graphs

A generalization of interval graph is introduced for cosmid contig mapping of DNA. A graph is a tagged probe interval graph if its vertex set can be partitioned into two subsets of probes and nonprobes, and a closed interval can be assigned to each vertex such that two vertices are adjacent if and only if at least one of them is a probe and one end of its corresponding interval is contained in the interval corresponding to the other vertex. We show that tagged probe interval graphs are weakly triangulated graphs, hence are perfect graphs. For a tagged probe interval graph with a given partition, we give a chordal completion that is consistent to any interval completions with respect to the same vertex partition.