从文献计量学统计分析检索语言的标引

文章对《合肥工业大学学报》(自然科学版)2004年刊载论文的关键词标引情况,从文献计量学研究入手,对关键词在数量上、种类分布上,篇均个数及英语化程度等方面,进行了详细的统计和分析;在此基础上,指出《合肥工业大学学报》关键词标引的水平、特点以及存在的不足之处;为进一步提高《学报》的办刊质量,扩大影响力,指出了明确的努力方向。     

铁基形状记忆合金防松螺母研究

提出利用功能材料-铁基形状记忆合金来研制防松螺母,并对所研制的防松螺母进行试验研究,通过试验测试发现该螺母具有较好的防松性能,此外,对该新型螺母的重复使用性能进行了分析和试验测试,试验结果表明,通过控制恢复退火温度,能实现防松螺母的重复使用。     

Expressed sequence tags analysis revealing the taxonomic position and fatty acid biosynthesis in an oleaginous green microalga, Myrmecia incisa Reisigl (Trebouxiophyceae, Chlorophyta)

cDNA library of Myrmecia incisa H4301 was constructed using λ phage vectors.The library consisted of 1.5×10 6 clones with a recombination rate of 90%,and 1942 clones were randomly sequenced.All 1854 readable expressed sequence tags(ESTs) were clustered into 596 non-redundant sequences(NRSs),among which 126 NRSs were from 1384 ESTs,showing a high redundancy.Among the 596 NRSs,30 were ribosomal RNA,and 152 significantly matched with those available in NCBI database and JGI Genome Portal,the latter were divided into nine subcategories.Overall,59 NRSs were involved in photosynthesis,the respiratory electron transport chain,ATP synthesis,oxidation reduction,fatty acid biosynthesis,glucose metabolism,protein metabolism,and small molecular metabolism,suggesting that these genes were abundantly transcribed during energy and substance metabolism.Acyl-carrier protein,ferrodoxin and fatty acid elongase genes obtained from this cDNA library enabled presumption of a possible biosynthesis pathway of ArA in M.incisa.Codon usage analysis of 142 NRSs with 17798 codons in the predicted coding regions showed that the average G+C content level of the total codons was 55.39%,and that of the third position in base trimers was 66.42%,indicating a strong bias toward cytosine and/or guanosine in this algal genome.Among all synonymous codons,NAG was most favored,while NUA was most avoided.Phylogenic trees inferred from ribulose-1,5-bisphosphate carboxylase/oxygenase small subunit genes and the extra partial sequences of 18S rRNA obtained from this library demonstrated that M.incisa belonged to Trebouxiophyceae and was significantly clustered with M.incisa SAG 2007,Lobosphaera tirolensis,M.bisecta,and Parietochloris incisa,but was clearly distant from P.pseudoalveolaris and P.alveolar.Transmission electron microscopy revealed pyrenoids traversed by many parallel thylakoids membranes,while starch grains were only clearly observed when cells were grown under nitrogen stress.Based on combined investigation of the phylogeny and morphological characteristics,it is proposed that M.incisa be kept in the genus Myrmecia in which there might be two parallel groups,one living freely and another symbiotic species.     

一种Web自适应界面的设计方法

提出了一种Web自适应界面技术的新思路.将获取用户个性信息作为Web使用挖掘的任务,从界面内的功能对象和界面区域入手,设计一个能产生功能对象对的算法来预测用户下一行为;划分界面为多个子区域来放置功能对象,利用自适应公式设计的算法进行动态布局,达到智能化的效果,成为一种新型的用户界面.经过多用户的反复使用实验,该方法初步实现了功能对象与Web界面的自适应.     

集成运算放大器使用电源的不对称性

详细阐述了集成运算放大器的电源使用知识，以求补充和完善教材内容，切实加强实用电子技术的教学，同时，在集成运放的实际使用方面为电子爱好者提供了实用的参考素材．     

杨东河水利枢纽大坝工程烧棒溪料场规划及开采

由于杨东河枢纽大坝工程地势陡峭,地质条件复杂,修路到达料场顶部进行料场开挖十分困难,因而杨东河水利枢纽大坝工程料场开挖是杨东河枢纽大坝工程施工的难点之一,其规划的好坏是杨东河水电站能否实现2010年度汛目标及按期投产的关键。根据公司专家意见及经现场参建各方的讨论,现有花郎坪料场依据现场的地形条件无法满足大坝上坝强度要求,因此,增选了烧棒溪料场,并对烧棒溪料场的开挖进行了方案比选,采用了有效的"之"字形道路方案,使设备通达料场顶部,为料场开采提供了有利的保障,为下一步填坝工作奠定了基础。     

A Peer-to-Peer resource sharing scheme using trusted computing technology

Facing the increasing security issues in P2P networks, a scheme for resource sharing using trusted computing technologies is proposed in this paper. We advance a RS-UCON model with decision continuity and attribute mutability to control the usage process and an architecture to illustrate how TC technologies support policy enforcement with bidirectional attestation. The properties required for attestation should include not only integrity measurement value of platform and related application, but also reputation of users and access history, in order to avoid the limitation of the existing approaches. To make a permission, it is required to evaluate both the authorization and conditions of the subject and the object in resource usage to ensure trustable resources to be transferred to trusted users and platform.     

语料库语言学在词的用法研究中的应用

通过语料库语言学方法，在对规模400多万词次的4个语料库的检索结果进行分析和归纳后，对英语形容词considerable及其所修饰的名词的特点做了较为详尽的描述。提供了一个通过描述性研究方法来研究词的用法的范例。     

人的创造性发展的意义及其实现路径

对人的创造性发展意义的认识。不应局限于人的创造性发展与知识社会发展之间相互关系的角度。还应该从人的创造性的本质和人的创造性发展与情感发展之间相互关系的方面来理解人的创造性发展的意义。通过转换教师作用、改造课程内容、回归人的生活世界等措施来确立学生的主体地位和实现人的创造性发展。     

Predicting disease genes for familial dilated cardiomyopathy based on the codon usage bias

Familial dilated cardiomyopathy （FDC） is a common monogenic disease mostly with autosomal dominant inheritance. Fifteen different loci for autosomal dominant FDC have been mapped; however, only eight FDC genes have been found, and it is still a big challenge to identify additional seven FDC genes in their chromosomal regions. We found that the codon usage frequencies in most of known FDC gene sequences are consistently biased, and significantly different from the average codon usage frequencies of human genes. This unique feature of codon usage was used to develop a novel approach to predicting FDC genes. Leave-oneout cross-validation results demonstrate that this approach can effectively detect FDC genes from numbers of genes in their chromosomal regions. Another advantage of this approach is that it is solely based on DNA sequences and therefore has the ability to identify potential FDC genes whose functions are completely unknown. Further, this approach has been used to analyze the seven FDC loci in which the FDC genes are still unknown. Both the detailed prediction results and the prediction program are available at http：// infosci.hust.edu.cn, which might provide help for relevant experimental researches to find new FDC genes.