基于CCFE增强型知识共享许可协议的网络数字作品版权保护机制的构建

首先从技术协议构建层面,对当下热门的数字版权许可协议--知识共享许可协议(CCL)进行简要介绍;其次,在对原有CCL改进和增强的基础上,提出一个新的协议范式--知识共享文件扩展名协议（CCFE）,旨在修正现有CCL存在的缺陷并进一步优化其框架结构;最后,阐释如何借助这一新的协议范式构建数字图书馆数字化资源以及使用搜索引擎在版权规范指导下收集和获取网上数字化内容。     

慢性肾脏病中医医案解析及管理系统设计与实现

慢性肾脏病是一种严重威胁人类健康的全球性疾病,中医在预防和治疗慢性肾脏病上具有一定优势。中医医案是中医诊疗过程的记录,蕴含着丰富的中医学术思想与临床经验。基于 Java EE 结合模式匹配技术,设计开发了慢性肾脏病中医医案解析与管理系统,实现慢性肾脏病中医医案患者基本信息、病史信息、诊断信息、住院信息、出院信息、理化检查信息等记录的解析、存储与管理。该系统有利于中医医疗人员对慢性肾脏病中医医案的分析、利用与管理,促进中医在治疗慢性肾脏病方面更好地发展。     

基于Lucene技术的全文检索网络教学系统的研究与设计

在网络教学平台加入定制的Lucene全文搜索引擎,实现了针对各种类型教育资源的全文索引/检索功能。通过在网络教学平台上的应用测试,证明了在网络教学平台上构建一个全文检索引擎是成功的,可以对网络教学平台站内网页中各种教学资源进行全文检索。     

Effect of verbal instructions and image size on visual search strategies in basketball free throw shooting

We assessed the effects on basketball free throw performance of two types of verbal directions with an external attentional focus. Novices ( n = 16) were pre-tested on free throw performance and assigned to two groups of similar ability ( n = 8 in each). Both groups received verbal instructions with an external focus on either movement dynamics (movement form) or movement effects (e.g. ball trajectory relative to basket). The participants also observed a skilled model performing the task on either a small or large screen monitor, to ascertain the effects of visual presentation mode on task performance. After observation of six videotaped trials, all participants were given a post-test. Visual search patterns were monitored during observation and cross-referenced with performance on the pre- and post-test. Group effects were noted for verbal instructions and image size on visual search strategies and free throw performance. The 'movement effects' group saw a significant improvement in outcome scores between the pre-test and post-test. These results supported evidence that this group spent more viewing time on information outside the body than the 'movement dynamics' group. Image size affected both groups equally with more fixations of shorter duration when viewing the small screen. The results support the benefits of instructions when observing a model with an external focus on movement effects, not dynamics.     

A heuristic hierarchical scheme for academic search and retrieval

We present PubSearch, a hybrid heuristic scheme for re-ranking academic papers retrieved from standard digital libraries such as the ACM Portal. The scheme is based on the hierarchical combination of a custom implementation of the term frequency heuristic, a time-depreciated citation score and a graph-theoretic computed score that relates the paper’s index terms with each other. We designed and developed a meta-search engine that submits user queries to standard digital repositories of academic publications and re-ranks the repository results using the hierarchical heuristic scheme. We evaluate our proposed re-ranking scheme via user feedback against the results of ACM Portal on a total of 58 different user queries specified from 15 different users. The results show that our proposed scheme significantly outperforms ACM Portal in terms of retrieval precision as measured by most common metrics in Information Retrieval including Normalized Discounted Cumulative Gain (NDCG), Expected Reciprocal Rank (ERR) as well as a newly introduced lexicographic rule (LEX) of ranking search results. In particular, PubSearch outperforms ACM Portal by more than 77% in terms of ERR, by more than 11% in terms of NDCG, and by more than 907.5% in terms of LEX. We also re-rank the top-10 results of a subset of the original 58 user queries produced by Google Scholar, Microsoft Academic Search, and ArnetMiner; the results show that PubSearch compares very well against these search engines as well. The proposed scheme can be easily plugged in any existing search engine for retrieval of academic publications.     

浅谈Internet与化学

随着信息高速公路的发展 ,Internet与化学研究、教学的联系日益紧密 ,本文从Internet所提供的几种主要服务入手 ,简要地介绍了化学工作者如何利用Internet进行国内、国际间学术的交流和讨论 ,以及因此而给化学研究、教学带来的巨大推动力     

Web数据挖掘在搜索引擎中的应用

分析了搜索引擎的结构组成,从Web的结构挖掘、内容挖掘、使用挖掘3方面对Web挖掘在搜索引擎中的应用进行阐述。     

智能型搜索引擎研究

随着网络与通信技术的迅速发展,Web信息爆炸性的增长形成已经一个巨大的海量信息空间。如何快速、准确、方便地从如此庞大的信息库中获取自己需要的信息,是互联网用户面临的一个重要问题。Web搜索引擎能为用户提供一种查找所需资源的服务,已经成为互联网上仅次于电子邮件的第二大服务。首先介绍了搜索引擎和数据挖掘技术的概念,描述传统搜索引擎的局限性,然后介绍数据挖掘在搜索引擎中的应用及优点。最后,给出了搜索引擎的发展方向。     

Knock prediction for dual fuel engines by using a simplified combustion model

INTRODUCTIONDuetodwindlingfueloilreservesandthedesireforreducedpollutantemissions,naturalgas,whichisdominantlycomposedofmethane,hasbeennowwidelyusedasanalternativefuelininternalcombustionengines .Aconventionaldieselenginecanbeconvertedwithoutexcessiveincr…     

国外网络教学资源的发掘研究

论文提出了围绕线索深度挖掘,从而找到高质量国外网络教学资源的方法:即了解国外网络教学资源的各种特征,选择合适的搜索引擎作为检索工具,结合搜索引擎的高级语法,对初步检索结果进行分析推理。