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1.
藏语文信息监测与发布关键技术难点主要包括网络爬虫算法设计、藏文自动分词及词性标注和藏文命名实体识别。文章围绕以上三个方面分别探索了网络爬虫技术、藏文自动分词及词性标注规则算法和藏文命名实体识别构思,致力于形成与舆情、安全相关的藏语文信息监测技术方案。  相似文献   

2.
对知识挖掘服务系统的建设背景、系统的功能与建设内容进行了详细的分析与设计。该系统通过将企业积累的信息通过文本提取技术获得内容信息,使用中文分词算法进行深入分析,形成完整的知识脉络结构,建立企业知识体系,为企业提供知识分享、个性化定制与推送、关联推荐等智能化的知识服务。  相似文献   

3.
通过对已有的分词算法尤其是快速分词算法的分析,提出了一种新的分词词典结构,并据此提出了二次Hash^+二分最大匹配快速分词算法。该算法具有较快的分词速度。  相似文献   

4.
基于中文分词的专利挖掘分析方法研究   总被引:1,自引:0,他引:1       下载免费PDF全文
专利作为世界上最大的技术信息源,受到企业的日益重视。本文提出了一种基于中文分词的专利挖掘分析过程,首先进行专利信息的检索、提取和清洗,然后利用中文分词对专利名称进行关键词组的提取,细化专利名称、摘要等专利信息,最后在此基础上挖掘出专利的技术发展路线,不同技术之间的关联关系以及相似专利簇等。该过程方法在空调行业专利数据中得到了应用,有助于企业进行专利地图绘制、技术研发和专利战略实施。  相似文献   

5.
作为网络安全产品的基于隔离技术的隔离网闸越来越受人关注,隔离网闸自带的文本内容过滤大多基于关键字过滤和URL过滤,这种内容过滤在使用性能上不但过滤效果欠佳且效率差,已不能满足日益增长的网络信息的安全要求;研究了文本信息过滤的模型、文本预处理技术、文本特征选择技术、过滤算法,提出了基于统计的适合于隔离网闸的智能文本过滤的方案,并对新方案中的关键技术加以研究和实现。  相似文献   

6.
从信息过滤系统模型功能及其实现出发,探讨了Google中PageRank技术环境下的用户偏好的分析描述与表达.在传统的过滤算法的基础上进行了改进后的过滤算法的模型构建和原形研究,结合实践进行了实验结果分析.  相似文献   

7.
本文探讨了神经网络算法在中文分词中的研究和应用,利用误差反向传播的理念,设计出一种基于神经网络的分词系统。并针对BP神经网络在中文分词技术中存在的一些缺陷,如收敛速度慢、易陷入局部极小等,引入输出值调整等相关优化技术,达到了提高分词精度、提升模型稳定的目的。  相似文献   

8.
作为网络安全产品的基于隔离技术的隔离网闸越来越受人关注,隔离网闸自带的文本内容过滤大多基于关键字过滤和URL过滤.这种内容过滤在使用性能上不但过滤效果欠佳且效率差,已不能满足日益增长的网络信息的安全要求;研究了文本信息过滤的模型、文本预处理技术、文本特征选择技术、过滤算法,提出了基于统计的适合于隔离网闸的智能文本过滤的方案,并对新方案中的关键技术加以研究和实现。  相似文献   

9.
李爽 《科技通报》2012,28(4):180-181
针对传统的朴素贝叶斯算法对垃圾邮件的过滤率不高等问题,提出了一种基于最小风险贝叶斯网络垃圾邮件信息过滤技术,提出的最小风险贝叶斯能够减少正常邮件判为垃圾邮件的风险,最后实验表明,与传统的算法相比较,本文提出的方法过滤效果有较大的提高。  相似文献   

10.
本文首先简要介绍了 lucene 桌面搜索引擎技术现状,根据桌面搜索的的不足,提出了一种基于 Lucene 的中文搜索引擎设计方案.使用了中文的分词技术的正向最大般配算法解决 lucene 对中文分词存在不足  相似文献   

11.
Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said.  相似文献   

12.
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China's science enterprise by making S&T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party's Leading-member Group at CAS, which was held from 7 to 11 January in Beijing.  相似文献   

13.
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors.  相似文献   

14.
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants."  相似文献   

15.
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007.  相似文献   

16.
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction.  相似文献   

17.
Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction.  相似文献   

18.
Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies.  相似文献   

19.
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means.  相似文献   

20.
This essay focuses on universal service and the Internet as means to support social and political participation. The emphasis on access to telecommunications systems in conventional approaches to universal service is contrasted with access to content. A model of the information environment is described that accounts for the roles of content and conduit, both of which are necessary conditions to achieve true access. A method is outlined for employing information indicators to observe or measure the information environment.  相似文献   

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