New methods for compression of MP double array by compact management of suffixes     

Tshering C. Dorji  El-sayed Atlam  Susumu Yata  Mahmoud Rokaya  Masao Fuketa  Kazuhiro Morita  Jun-ichi Aoe 《Information processing & management》2010

Minimal Prefix (MP) double array is an efficient data structure for a trie. However, its space efficiency is degraded by the non-compact management of suffixes. This paper presents three methods to compress the MP double array. The first two methods compress the MP double array by accommodating short suffixes inside the leaf nodes, and pruning leaf nodes corresponding to the end marker symbol. These methods achieve size reduction of up to 20%, making insertion and deletion faster at the same time while maintaining the retrieval time of O(1). The third method eliminates empty spaces in the array that holds suffixes, and improves the maximum size reduction further by about 5% at the cost of increased insertion time. Compared to a Ternary Search Tree, the key retrieval of the compressed MP double array is 50% faster and its size is 3–5 times smaller.  相似文献   

Measuring the effectiveness of public subsidy by the analysis of disparate data sources: do subsidies increase arts participation by low engagers?     

Jennifer Eigo  John Wilson 《Cultural Trends》2019,28(2-3):239-248

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AI applications of data sharing in agriculture 4.0: A framework for role-based data access control     

《International Journal of Information Management》2021

Industry 4.0 and the associated IoT and data applications are evolving rapidly and expand in various fields. Industry 4.0 also manifests in the farming sector, where the wave of Agriculture 4.0 provides multiple opportunities for farmers, consumers and the associated stakeholders. Our study presents the concept of Data Sharing Agreements (DSAs) as an essential path and a template for AI applications of data management among various actors. The approach we introduce adopts design science principles and develops role-based access control based on AI techniques. The application is presented through a smart farm scenario while we incrementally explore the data sharing challenges in Agriculture 4.0. Data management and sharing practices should enforce defined contextual policies for access control. The approach could inform policymaking decisions for role-based data management, specifically the data-sharing agreements in the context of Industry 4.0 in broad terms and Agriculture 4.0 in specific.  相似文献   

Dances with bees: Exploring the relevance of the study of animal communication to informatics     

Paul Beynon-Davies 《International Journal of Information Management》2010

This paper describes part of a larger body of theoretical work which provides a new perspective on the nature of informatics, an umbrella term used to stand for the overlapping disciplinary areas of Information Systems, Information Management and Information Technology. We argue for an area of interest located at the intersection of signs and systems, which involves the enactment of forma (the substance of a sign), informa (the content of a sign) and performa (the use of signs within coordinated action). This conceptual scheme is reflected against work not traditionally covered by theory-making within informatics: that of animal communication. We use the well-documented case of the dance of the European honeybee to help ground our discussion. This examination leads to an understanding of the central position of communication amongst organisms as well as the place of human communication in the broad evolution of communication systems. This allows us to highlight crucial features of the concept of a data system as well as the important distinction between persistent and non-persistent data systems within communication processes.  相似文献   

高校校园网信息安全核心技术的应用研究     

罗跃国 《人天科学研究》2010,(8):156-158

依据长江师范学院校园网建设的实际情况进行了安全需求分析,然后具体给出了数据安全、网页防篡改、防火墙、IDS等方面的安全解决方案。目前的运行结果表明,该方案设计合理,能较好满足校园网的安全需求。  相似文献   

基于数据包络分析的中国主要城市旅游效率评价   总被引：13，自引：0，他引：13  

马晓龙  保继刚 《资源科学》2010,32(1):88-97

追求更高的资源利用效率是城市旅游发展的目标,城市旅游效率评价是城市进行旅游发展资源投入的依据。利用数据包络分析方法(Data Envelopment Analysis,以下简称DEA),以2005年中国58个主要城市为对象,对这些城市旅游效率的统计特征、分组特征、阶段特征和分解效率对总效率的贡献进行了评价。结果显示:该时期大多数城市的旅游处于无效率状态,且总体水平较低,平均值仅为0.44;从旅游发展的阶段上看,处于经济发达地区的城市更容易进入旅游发展的规模收益递减阶段;规模效率对总效率的影响和制约程度最强,其次是技术效率和利用效率。从我国城市旅游发展的阶段特征出发,对上述特征形成的原因进行了解释,认为现阶段中国区域经济发展的不平衡性是导致旅游效率总体水平偏低的根本原因,并对研究结果的政策含义进行了讨论。  相似文献   

网络管理系统开发中几个关键问题的讨论     

舒畅  李秀玲  刘丽丽 《人天科学研究》2010,(9):148-150

介绍了网络管理系统的5大功能,就网络管理系统的设计和开发过程中的几个难点问题,包括稳定性、实时性以及海量数据处理等分别进行了详细讨论,随后有针对性地给出了这类问题的初步解决方案。  相似文献   

基于数据仓库的高校就业信息管理OLAP系统设计     

王武习 《人天科学研究》2010,(1)

结合数据仓库的相关概念进行了分析、介绍高校就业管理OLAP系统设计,通过OLAP工具分析了其多维数据,使决策者能以快速地从各个角度分析数据,为学校作出科学的决策提供了辅助支持。  相似文献   

计算机网络与信息安全     

陆汉文 《人天科学研究》2010,(2):130-131

随着计算机技术的飞速发展,信息网络已经对社会发展产生重要影响。信息网络已涉及国家的政府、军事、科技、文教等多个领域,其中存储和加工处理的信息非常重要。  相似文献   

基于C/S与B/S架构的科研项目管理系统     

刘鹏  宋为  万俊 《人天科学研究》2010,(1)

在分析C/S与B/S的工作模式以及功能比较的基础上,根据科研项目管理系统的工作方式及其核心功能,设计出基于C/S与B/S相结合的架构体系和技术线路。解决了系统不同类型用户的差异性需求,实现了科研项目管理工作全程无纸化、网络化和智能化,提高了科研项目管理的效率。  相似文献