网络信息计量研究中常用的四种搜索引擎的比较研究

对在网络信息计量研究中常用的四种搜索引擎的索引数据库、检索功能、检索结果显示、用户界面等方面进行了比较研究，并指出了他们在网络信息计量研究中的优势与不足。     

搜索引擎用户满意度研究的实证分析——以百度和Google中国为例

从用户的角度,建立搜索引擎用户满意度测评理论模型,构建搜索引擎用户满意度评价指标体系,以用户满意为标准对搜索引擎进行评价.最后应用问卷调查法以目前使用最为广泛的百度和Google中国搜索引擎门户为研究对象进行实证研究.并有针对性的提出搜索引擎的改进措施和发展方案,以期望提高搜索引擎服务水平,丰富其服务内容,最大限度的满足用户需求.     

下一代Web搜索引擎探讨

本文在总结目前的Web搜索引擎现状的基础上,分析了目前的Web搜索引擎所面临的四个主要挑战,探讨了下一代Web搜索引擎的改进措施和发展方向。     

中药蒸汽浴消除运动性疲劳的几项实验研究

使用自行研制的中药蒸汽浴,对水上运动队运动员进行一个疗程(四个月)的消除运动性疲劳的治疗。疗程前后对比血乳酸(BLA)、血红蛋白(Hb)等几项指标有显著差异(P<0.01)。与对照组比较以上指标也呈显著性差异变化(P<0.01)。研究表明:中药蒸汽浴可有效地消除运动性疲劳,加速血乳酸清除能力或减少运动后血乳酸的形成,有利于有氧及无氧运动能力的提高,是一种新的恢复手段,对提高训练和比赛成绩具有独特的优势。     

Success in a Parallel Universe,Perhaps with some Help from your DAD Digital Asset Distribution

A new digital distribution infrastructure is being created to parallel the structure in the physical world by which content is stored, distributed, and invoiced. Like in the physical world, book publishing will need fewer points of distribution than it has points of creation: there will be “distributors” handling the digital content of many publishers and some large publishers will handle the digital content of smaller ones. This system is just now taking shape and this paper defines the terms and enumerates some of the emerging players in this role. This paper was first presented during the “Making Information Pay 2007” on May 10, 2007 organized by the Book Industry Study Group (). The research completed will help any publisher with the task of finding a DAD. The research paper version of our work will be made available as a final White Paper, with conclusions and updated information by Klopotek Inc. that can be ordered at Klopotek.com     

柴油机技术状态及故障诊断的一种有效的新方法

本文论述了柴油机技术状态及故障诊断的新方法——应用轴系扭振的特性作为故障诊断的手段。笔者根据研究成果,阐明了柴油机工作过程与扭振特性之间的紧密关系及相互间对应的因果联系,讨论了柴油机机械故障与扭振特性的影响。结论是轴系扭振将是柴油机技术状态及故障诊断的一种前途广阔的有效的新途径,将成为振动噪声故障诊断的一项极其重要的方法。文章还提出了今后的研究方向。     

如何在因特网上查找全文资料

本文主要论述了如何在因特网上查找全文资料的方法和途径,着重介绍了两种网络全文检索工具,并对目前电子版文献的信息缺失问题作了探讨,给出了相应的解决方案。     

搜索引擎的排序技术研究

提出按搜索引擎的排序技术把搜索引擎分为三代，介绍了主要的几种搜索引擎排序技术，并对第三代搜索引擎的发展进行了分析。     

Influence of co-authorship networks in the research impact: Ego network analyses from Microsoft Academic Search

The main objective of this study is to analyze the relationship between research impact and the structural properties of co-author networks. A new bibliographic source, Microsoft Academic Search, is introduced to test its suitability for bibliometric analyses. Citation counts and 500 one-step ego networks were extracted from this engine. Results show that tiny and sparse networks – characterized by a high Betweenness centrality and a high Average path length – achieved more citations per document than dense and compact networks – described by a high Clustering coefficient and a high Average degree. According to disciplinary differences, Mathematics, Social Sciences and Economics & Business are the disciplines with more sparse and tiny networks; while Physics, Engineering and Geosciences are characterized by dense and crowded networks. This suggests that in sparse ego networks, the central author have more control on their collaborators being more selective in their recruitment and concluding that this behaviour has positive implications in the research impact.     

基于nRF9E5的无线热力特性测试系统硬件设计

火电厂中经常需要对汽轮发电机热力特性进行测试试验,本文提出了一种用于汽轮机热力特性测试试验的基于nRF9E5无线数据采集模块的数据采集系统方案,具有抗干扰性强、低成本、低功耗等优点。