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本文分析了数据交换技术的发展,指出STEP技术可以满足集成化系统开发的需要,而面向对象技术则很好地解决了模型间的数据交换,并据此提出了一基于面向对象和STEP的注塑模产品模型,该模型分为总体信息模型、主特征模型、结构信息模型及辅助装置模型,并用EXPRESS-G对其作了进一步阐述。 相似文献
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本文分析了数据交换技术的发展,指出了STEP技术可以集成化系统开发的需要,而对象技术则很好地解决了模型间的数据交换,并据此提出了一基于面向对象和STEP的注塑模产品模型,该模型分为总体信息模型,主特征模型,结构信息模型及辅助装置模型,并用EXPRESS-G对其作了进一步阐述。 相似文献
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基于组件的决策支持系统模型设计与实现 总被引:8,自引:0,他引:8
决策支持系统(Decision Support System简称DSS)是模型驱动的,DSS中模型的设计与实现是一个有待进一步研究的问题。本文把组件技术引入到DSS模型的设计与实现中来,提出基于组件技术的DSS的模型设计与实现策略。给出基于组件思想的DSS模型定义和运算,并给出基于组件技术的DSS基模型和复合模型的实现方法。 相似文献
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随着业务流程模型管理库规模的增大,传统的模型管理方式在效率和准确度方面已经无法达到预期,研究能够提升业务流程模型管理效率的技术成为人们的迫切需求。其中,业务流程模型相似度技术在模型搜索、模型一致性检测等模型管理的相关应用场景中能够有效提升工作的效率和精度,因此,对业务流程模型相似度技术的研究已经逐渐成为模型分析领域的一个研究热点,并取得了许多有价值的研究成果。业务流程模型相似度技术涉及的领域较多,可以向不同的分支方向发展,虽然不同分支的模型相似度技术会有方法之间的类比,但是缺乏系统性的整理和分析。文中从相似度计算方法和应用场景这两个层面对业务流程模型相似度技术进行了分类讨论,将相似度计算方法分为文本相似度、语义相似度、结构相似度、行为相似度和基于人类评估的相似度,并分析了每种计算方法的特点。较为常见的业务流程模型相似度应用场景包括一致性检测、标准化、流程模型搜索和模型重用,文中对基于以上场景的相关研究进行了梳理。最后分析了业务流程模型相似度研究面临的挑战。 相似文献
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描述二维自由曲面的造型技术,提出了基于区域填充拉伸、纹理映射、线状模型的造型方法,并对中国水墨画的浮雕造型方法进行了描述。自然物体表面模型的生成技术是二维半模型造型的技术关键,采用由影调到物体表面外形的恢复技术,有效地解决了从实体图象到模型表面的重建问题。 相似文献
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针对虚拟植物在农林业中的应用,提出了基于双尺度自动机的“生长机”模型构建技术,对生理生态模型和形态发生模型的接口进行了定义,并兼顾生长机模型构建的普适性,采用模块化设计,减少了由于专用模型修改带来的大量代码改动,该技术经过验证取得了预期效果。 相似文献
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网络信息技术的飞速发展带来了一系列庞杂的信息资源。当然,数字图书馆信息服务资源也在此范围内。很
明显,以大数据为手段,对海量数据进行分析、整合就变得很有必要。因此,以大数据环境为背景,变革数字图书馆信息服务的
理念、资源、技术和策略,必将有助于加强其基于资源信息整合、用户需求的挖掘。本文首先提出了数字图书馆信息服务因大
数据环境而带来的影响,接着介绍了大数据下数字图书馆信息服务的内涵,本文从其目的和特征两方面进行介绍,并最终引出
大数据下数字图书馆信息服务模式研究。 相似文献
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高校图书馆的数字化系统中,积累了大量的读者对资源的历史访问数据。这些数据背后隐藏着许多重要的信息,通过对其进行更高层次的分析,便能更好地利用这些数据为读者服务。文章在描述数据挖掘技术与方法的基础上,结合目前高校的实际情况,探讨了数据挖掘在数字图书馆中的应用空间以及其所具有的应用价值,就如何应用数据挖掘技术进行了研究,并给出了利用数据挖掘技术在高校图书馆中优化馆藏资源和提供读者个性化服务的实现过程及方法。 相似文献
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高校图书馆的数字化系统中,积累了大量的读者对资源的历史访问数据。这些数据背后隐藏着许多重要的信息,通过对其进行更高层次的分析,便能更好地利用这些数据为读者服务。文章在描述数据挖掘技术与方法的基础上,结合目前高校的实际情况,探讨了数据挖掘在数字图书馆中的应用空间以及其所具有的应用价值,就如何应用数据挖掘技术进行了研究,并给出了利用数据挖掘技术在高校图书馆中优化馆藏资源和提供读者个性化服务的实现过程及方法。 相似文献
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Junsheng Zhang Yunchuan Sun Lijun Zhu Xiaodong Qiao 《Personal and Ubiquitous Computing》2014,18(8):1845-1854
Digital library services in the mobile computing have come into our daily life with the development of wireless communication and the manufacture of mobile devices. Digital libraries have collected large-scaled data for providing information service. However, there are still many problems such as limitations of computing on mobile devices and data transmission problems in the wireless network. This paper proposes a synergetic mechanism for digital library to provide information service in the mobile and cloud computing environment, which combines the digital library servers, mobile hosts and personal cloud space into a synergetic work group seamlessly. The proposed mechanism integrates the strong computing and large-scaled storage ability of cloud computing together with the convenience of mobile computing. It could help promoting knowledge sharing and improve work efficiency of users in the mobile and cloud computing environment. 相似文献
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Bing Wang 《International Journal on Digital Libraries》1999,2(2-3):91-110
A digital library (DL) consists of a database which contains library information and a user interface which provides a visual
window for users to search relevant information stored in the database. Thus, an abstract structure of a digital library can
be defined as a combination of a special purpose database and a user-friendly interface. This paper addresses one of the fundamental aspects of such
a combination. This is the formal data structure for linking an object oriented database with hypermedia to support digital
libraries. It is important to establish a formal structure for a digital library in order to efficiently maintain different
types of library information. This article discusses how to build an object oriented hybrid system to support digital libraries.
In particular, we focus on the discussion of a general purpose data model for digital libraries and the design of the corresponding
hypermedia interface. The significant features of this research are, first, a formalized data model to define a digital library
system structure; second, a practical approach to manage the global schema of a library system; and finally, a design strategy
to integrate hypermedia with databases to support a wide range of application areas.
Received: 15 December 1997 / Revised: June 1999 相似文献
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In the last decade, scientific digital libraries were traditionally used for publishing research results and for enabling wide open access to them. Functional capabilities of digital libraries can be extended by offering users the opportunity of linking information objects of the library and providing for created linkages explicitly defined semantics based on a given ontology. Such an activity of users, which is peculiar to social networks, motivated by different reasons, and carried out on their own initiative, results in the dynamic semantic structure of the digital library content. In the environment of such a kind of a social network, certain new forms of scientific activities become possible and data sources can be created that provide more information for scientometric researches as compared to presently available ones. In this paper, we propose an approach for creating such networks and discuss results of its implementation in the Socionet environment; the Socionet is a large-scale online information space that covers information resources of a number of scientific, educational, etc. organizations. 相似文献
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Ross Todd 《New Review of Information Networking》2013,18(1):61-79
The provision of information services has changed dramatically over the last few years, particularly with developments in access to networked information technology and the shift from a paper‐based to a digital information environment. The development of the ‘digital library’ or ‘virtual library’ in particular has created an information environment that is complex and fluid, connective and interactive, and diverse and unpredictable. It is an environment that now places considerable responsibility on information users to be able to navigate this complex and often ambiguous information space. This does not happen by chance, and calls for considerable attention to be given to reshaping the role of information professionals in enabling users to effectively interact with this information. Against this backdrop, this paper will examine current research on information user behaviour in digital environments, particularly in relation to using Web‐based information services. It will highlight substantive issues in relation to education and training, particularly in the context of information literacy and its development in digital environments. 相似文献
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王晓明 《计算机技术与发展》2014,(5):227-230
为了使区域云数字图书馆尽快适应三网融合的环境,增加服务的渠道,一定程度上打破时空限制,扩大读者群,为用户带来海量、多样化的信息资源,对三网融合环境区域云数字图书馆的构建进行了研究。首先介绍了区域云数字图书馆的定义和研究现状、三网融合的定义和特征;然后指出三网融合环境下区域云数字图书馆的内涵和应用模式;最后重点阐述一种适用于三网融合环境的区域云数字图书馆的体系结构,并对构建所使用的关键技术进行了分析和探索。 相似文献
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Cyclades is a system that combines several technologies from the information retrieval and digital library fields, where users and user communities may deal with a rather large set of heterogeneous digital archives. Cyclades provides a highly personalized environment where users may organize (and search) information space according to individual taste and use; in addition, Cyclades provides advanced features of collaborative work among users. 相似文献