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11.
本文对运用XrML于数字图书馆实现版权保护和利益平衡之目的进行了探讨。在分析XrML应用于版权管理的基本原理和概念的基础上,讨论了XrML的4个基本概念及其在数字图书馆中的运用以及运用XrML实现数字图书馆版权保护与利益平衡的设计指导思想。 相似文献
12.
13.
信息伦理学研究中若干问题的思考 总被引:13,自引:0,他引:13
The further development of information ethics needs to solve some important ethic problems involved with disciplinary construction. These problems include the cause of the formation of information ethics; the research method,attribution and features of information ethics; the connotation and systematic structure of information ethics; the enlightenment we gain from the studies of the guiding principles of information ethics in foreign countries. The scientific analysis and exposition of these problems are helpful to the prosperity and perfection of information ethics and to the construction of social information ethics. 相似文献
14.
图书情报工作者的情报创新 总被引:4,自引:0,他引:4
Information value lies in innovation. Information innovation can provide high quality service for information users, enrich the content of information studies and enable librarians and information workers to play their parts to the full. The process of information innovation can be divided into the following stages seeking demand, seeking truth, seeking perfection, systematization, predictability, etc. In order to implement information innovation, we must have rational structure of knowledge,consciousness of innovation, strong ability to acquire documentary information and ability for expression. 相似文献
15.
垂直网站及其信息服务模式 总被引:7,自引:0,他引:7
The paper introduces vertical portals and their information service modes,analyzes the inevitability of their emergence and development, and finally gives some suggestions as to how to do a good job in providing information service through vertical portals. 相似文献
16.
基于内容的智能网络多媒体信息过滤检索 总被引:7,自引:2,他引:7
The paper discusses the construction of a content-based intelligent system that performs multimedia information filtering and retrieving on the Internet. The system disassembles the multimedia information into different media objects and describes them with vectors for content-based retrieval. In the user study module, the system uses the BP neural network to clarify the user interests for intelligent filtering and retrieving. 相似文献
17.
Plastid atpB/rbcL intergenic spacer sequences were obtained from 21 selected taxa and
one hybrid of Anemoninae (Anemone, Pulsatilla, Hepatica) and compared with Ficaria (Ranun-
culinae) as an outgroup. From the resulting matrix (1226 bp) a single most parsimonious tree was
obtained (Fig. 1 ). The branching of this tree is confirmed by many informative indels and appears
largely congruent with past plastid restriction analyses. Several new taxa are added. The monophyly
of the Anemoninae and their early split into two major clades is supported: clade I with the chromo-
some base number x = 8, clade Ⅱ with the reduced x = 7. Clade Ⅰ is made up of the basal Pulsatilla
and the Rivularis + Vitifolia groups. The Multifida group links to the crown groups Coronaria,
Blanda and Nemorosa. Clade Ⅱ consists of the basal Dichotoma group, followed by Hepatica, and
finally by the N. Hemisphere Narcissiflora and the S. Hemisphere Antucensis groups as sisters. The
problems of the Anemoninae ancestry, phylogenetic differentiation, and recent attempts for systemat-
ic classification are critically discussed. In view of the still incomplete sampling of DNA data, aconservative and informal approach to classification problems is recommended. 相似文献
18.
试论竞争情报工作的合法化 总被引:7,自引:0,他引:7
As competition requires fair law environment, competitive intelligence work should obey the rules of law, too. This article elaborates the legalization of competitive intelligence work from three aspects its necessity, manifestation and law system. Competitive intelligence tends to develop in the direction of standardization, and legalization is the inherent character of competitive intelligence. 相似文献
19.
IEEE802.11MAC层CSMA/CA机制的分析与研究 总被引:1,自引:0,他引:1
本文分别介绍了CSMA、CSMA/CD、CSMA/CA机制,着重分析了IEEE802.11MAC层CSMA/CA的实现方法和存在的一些弊端. 相似文献
20.
浏览器和HTTP协议在全球因特网的成功应用,促进了企业中的Browser/Server结构的迅速推广.基于Web的数据库应用系统通常采用三层(或多层)Client/Server(以下简称C/S)结构,允许用于各类不同的平台和选择相应的数据库应用环境. 相似文献