数字图书馆网络存储模式评析     

徐迈 《图书馆学研究》2006,(9):25-27

本文介绍了目前主要的存储体系结构，分析了各种体系结构的主要特点和适用环境，并对数字图书馆的存储发展趋势作了一些探讨。  相似文献   

江苏省高校图书馆网络数据库资源现状调查分析   总被引：7，自引：0，他引：7  

张艳 《现代图书情报技术》2004,20(11):43-45

通过对江苏省高校图书馆网络数据库资源分布、种类等的调查和统计，说明了江苏省高校图书馆网络数据库资源的现状、存在的问题，并对江苏省高校图书馆今后网络数据库资源建设提出了有关建议。  相似文献   

Pathways of Immigrant Political Socialization: Examining the Role of News Media,Social Connections,and Community Interaction     

Wenlin Liu  John Gastil 《Journal of Intercultural Communication Research》2014,43(3):238-263

Going beyond the traditional socioeconomic status model of political participation, this study examines pathways that lead to the sociopolitical incorporation of immigrants in the USA, with a focus on the role of communication socialization agents. Using a Current Population Survey sample of 7,626 first-generation immigrants in the USA, results show that communication socialization agents significantly contribute to immigrants’ political socialization, and an important mediating path translates political learning into greater political engagement. Results also identify ethnic differences in how socialization variables affect immigrants’ socialization.  相似文献   

Intercultural contacts and acculturation resources among International students in Australia: A mixed-methods study     

《Int J Intercult Relat》2020

This paper explores the impact of acculturation conditions, orientations and outcomes on international students in Australia’s tertiary education sector. Specifically, we investigate the factors that facilitate or hinder acculturation of international students within a multidimensional acculturation context (Arends-Tóth & van de Vijver, 2006). We used a sequential exploratory mixed-methods design in two studies to investigate acculturation of international students at an Australian university and test how these factors are related to psychological and sociocultural outcomes. In Study 1, we conducted a generic qualitative study using semi-structured interviews with a conventional content analyses approach,which compared the experiences of international students who on average had high numbers of positive experiences versus those who had high numbers of negative experiences. We found that a support network of mixed-nationals, and especially host locals, facilitates positive psychological and sociocultural adjustment, and buffers acculturative stress. Study 2 quantitatively tested the association of factors found in Study 1 (perceived stereotypes, intercultural and ethnic network/resources) with psychological and sociocultural acculturation outcomes. Study 2, shows that perceived negative stereotypes loosen ties with the dominant (host) culture and reinforces ties with the ethnic (non-host) culture. The social resources associated with either culture was found to be useful for acculturation, with both independently contributing to participant well-being. Contact with host locals played a particularly crucial role in developing these resources. Our findings provide foundations for pragmatic policy implications, suggesting value in the development of formally organized contact programs in the early sojourn experience of international students.  相似文献   

基于BP神经网络的大学生实践教学效果评价研究     

石莉  陈诚  邵艺 《扬州大学学报(高教研究版)》2020,(2):112-118

实践教学是高等学校教学工作的重要组成部分,其中实践教学效果评价是保障高等学校实践教学质量的重要环节。针对高校大学生项目实践教学效果评价需求,构建项目实践教学效果评价指标体系,在此基础上设计调查问卷,利用网络问卷收集评价原始数据,通过Python进行数据预处理,并采用BP神经网络对某高校大学生项目实践教学效果实施评价,结果表明,该方法对于高校实践教学效果评价具有较强的实用性。  相似文献   

基于BP神经网络的心电图三分类     

杜智慧  张瑞民 《丽水学院学报》2006,28(2):14-17

研究了一种基于神经网络的心电图分类方法,该方法利用前向多层神经网络的反向传播算法(Back Propagation),即BP算法,采用MATLAB软件建立用于三分类的BP神经网络,并利用大量的心电图数据训练神经网络,使神经网络对未训练过的心电图有较好的分类能力。实验结果表明,用这种方法用于心电图的三分类取得较好的效果。  相似文献   

人工神经网络在建设工程评标中的应用模型     

付辉 《广东技术师范学院学报》2007,(7):124-126

本文提出在建设工程评标中应用人工神经网络优选中标企业,详细介绍了该方法的应用模型及应用步骤,并且用实例来说明了该方法的优越性和实用性.  相似文献   

Header error control schemes for coping with upstream channel noise in the HFC network     

Chen Hui-fang  Xie Lei  Qiu Pei-liang 《浙江大学学报(A卷英文版)》2001,2(1):51-55

The Hybrid Fiber-Coax (HFC) network is being paid close attention to in recent years as a bi-directional broadband access network. To achieve seamless connection with the backbone network, and Asynchronous Transfer Mode (ATM) Network Network Interface (NNI) cell format is used as the basic transmission packet unit in the HFC system. As the transmission condition of the HFC system’s upstream channel is bad, two improved header error control (HEC) schemes, i. e. the improved HEC and the cell interleaving technique, are employed to guarantee the packet integrity. Theoretical analysis of the results showed that the improved HEC and the cell interleaving technique are applicable to isolated random errors and burst errors, respectively.  相似文献   

HEADER ERROR CONTROL SCHEMES FOR COPING WITH UPSTREAM CHANNEL NOISE IN THE HFC NETWORK     

陈惠芳  谢磊  仇佩亮 《Journal of Zhejiang University. Science. B》2001,(1)

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高技术企业创业的成功因素     

Prof. Dr. Michael Dowling 《科研管理》2004,25(Z1):106-111

通过对美国及德国的十多年研究表明,对于创新及合作网络的投资有利于促进高技术行业企业不断进步和发展.这些高技术行业包括电信、电脑设备及生物工艺的行业.研究表明政府政策在促进竞争及支持地区合作网络发展中起到了极其重要的作用.  相似文献