期刊文献+
共找到9,174篇文章
< 1 2 250 >
每页显示 20 50 100
一种基于Peer-to-Peer技术的Web缓存共享系统研究 被引量:19
1
作者 凌波 王晓宇 +1 位作者 周傲英 Ng Wee-Siong 《计算机学报》 EI CSCD 北大核心 2005年第2期170-178,共9页
提出了一种基于 peer to peer技术的分布式Web缓存共享系统:BuddyWeb.该系统的核心理念是让企业网络中的所有PC能够相互共享浏览器中的本地缓存,从而形成一个高效的、大规模的分布式缓存共享系统,并使系统具备易管理、易实现、低成本等... 提出了一种基于 peer to peer技术的分布式Web缓存共享系统:BuddyWeb.该系统的核心理念是让企业网络中的所有PC能够相互共享浏览器中的本地缓存,从而形成一个高效的、大规模的分布式缓存共享系统,并使系统具备易管理、易实现、低成本等优点;接着详细阐述了 BuddyWeb的工作原理和算法策略;然后,针对 Buddy Web系统的特性提出了仿真实验模型和评估方法.实验结果证明了BuddyWeb在命中率、网络通信流量负荷、系统响应延迟等诸方面均能取得令人满意的效果. 展开更多
关键词 peer-to—peer WEB缓存 动态自配置 自适应跳步
下载PDF
Peer-to-Peer环境下的信任模型研究 被引量:6
2
作者 张旭 孟魁 +1 位作者 肖晓春 张根度 《计算机科学》 CSCD 北大核心 2006年第9期52-53,73,共3页
开放、共享、匿名的peer-to-peer网络已经取得了越来越多的应用,无中心时等的特性也吸引了越来越多的用户,但同时也成为了网络攻击者传播恶意内容或病毒的温床。由于其网络中的节点不受约束,节点间存在着自愿的交易行为,因此节点之间的... 开放、共享、匿名的peer-to-peer网络已经取得了越来越多的应用,无中心时等的特性也吸引了越来越多的用户,但同时也成为了网络攻击者传播恶意内容或病毒的温床。由于其网络中的节点不受约束,节点间存在着自愿的交易行为,因此节点之间的信任很难通过传统网络的机制来制约和建立。本文旨在通过借鉴人类社会网络中的信任关系来建立一种信任模型,通过定义一系列信任的因子,用以制约用户行为,同时为用户寻求服务前提供参考。最后通过和其他信任模型的对比,我们的模型能够有效地激励用户提供反馈,遏制节点的不诚实行为。 展开更多
关键词 信任系统 peer-to—peer网络
下载PDF
Peer-Support in Oncology: A Qualitative Study of Caregivers Perception in a Cancer Center
3
作者 Guilhem Paillard-Brunet Audrey Couillet 《Psycho-Oncologie》 SCIE 2024年第1期23-31,共9页
This study aimed to gather healthcare professionals’expectations and reluctance toward peer support in a cancer center.Semistructured interviews were conducted among 12 professionals,recruited in different profession... This study aimed to gather healthcare professionals’expectations and reluctance toward peer support in a cancer center.Semistructured interviews were conducted among 12 professionals,recruited in different professions.The interviews were fully transcribed,and a thematic analysis was then conducted.Of the data analysis,three main themes about professionals’expectations emerged:the need for the strongest support of the patients,to break the isolation in the sickness,and to enhance the care system.Three main themes also emerged from the data analysis about professionals’reluctances:the limitations related to the intervention of the peer-workers,the psychological issues of the relationship,and institutional barriers to the implementation of peer-support interventions.Our study shows that peer support could be a response to the expectations of healthcare professionals’,but its implementation should consider their reluctance. 展开更多
关键词 peer-support ONCOLOGY healthcare professionals REPRESENTATIONS peer workers
下载PDF
Experience of Mental Health Professionals Collaborating with Peer Supporters in a Community Mental Health Service Team
4
作者 Sowon Lee Boyoung Kim Chung Kil Park 《International Journal of Mental Health Promotion》 2024年第4期251-260,共10页
This study explored how mental health professionals collaborate with peer supporters with mental disabilities in a community mental health institution.From January 19 to February 23,2021,three 60 min interviews were c... This study explored how mental health professionals collaborate with peer supporters with mental disabilities in a community mental health institution.From January 19 to February 23,2021,three 60 min interviews were conducted with six mental health professionals working at a Korean community center.The results were qualitatively analyzed and divided into four themes and eight categories.The four themes were the perceptions of and challenges in working with peer supporters with mental disabilities,conflict and confusion about working with peer supporters,forming partnerships with peer supporters,and policy support for peer supporters’job security.Participants reported vague anxiety about working with a peer supporter and difficulties with the trial-and-error process of adjusting to the role as challenging.Over time,however,they realized that they needed to make an effort to develop meaningful relationships with peer supporters and mental health professionals.Thus,through this study,we realized that there was a need to improve the system,such as building infrastructure for job stability for peer support workers and capacity building tailored to the mental disorders.Although peer supporters play various roles while working with mental health professionals,this study showed the possibility of mutual growth through communication and cooperation.These findings will help prepare systems necessary for collaboration between the two teams amidst the increasing institutionalization of peer support for mental disorders. 展开更多
关键词 peer supporters mental health mental health professionals collaborating
下载PDF
Is Peer Victimization Associated with Higher Online Trolling among Adolescents?The Mediation of Hostile Attribution Bias and the Moderation of Trait Mindfulness
5
作者 Yuedong Qiu Qi Sun +4 位作者 Jie Zhou Ni Jiang Wenyu Zeng Biyun Wu Fang Li 《International Journal of Mental Health Promotion》 2024年第8期623-632,共10页
Background:In recent years,online trolling has garnered significant attention due to its detrimental effects on mental health and social well-being.The current study examined the influence of peer victimization on ado... Background:In recent years,online trolling has garnered significant attention due to its detrimental effects on mental health and social well-being.The current study examined the influence of peer victimization on adolescent online trolling behavior,proposing that hostile attribution bias mediated this relationship and that trait mindfulness moderated both the direct and indirect effects.Methods:A total of 833 Chinese adolescents completed the measurements of peer victimization,hostile attribution bias,trait mindfulness,and online trolling.Moderated mediation analysis was performed to examine the relationships between these variables.Results:After controlling for gender and residential address,the study found a significant positive correlation between peer victimization and online trolling,with hostile attribution bias serving as a mediator.In addition,trait mindfulness moderated the direct relationship between peer victimization and online trolling.Specifically,the effect of peer victimization on online trolling was attenuated when adolescents had high levels of trait mindfulness.The results of the study emphasized the joint role of peer and personal factors in adolescents’online trolling behavior and provide certain strategies for intervening in adolescents’online trolling behavior.Conclusion:The results of the study suggest that strategies focusing on peer support and mindfulness training can have a positive impact on reducing online trolling behavior,promoting adolescents’mental health,and their long-term development. 展开更多
关键词 Online trolling peer victimization hostile attribution bias trait mindfulness ADOLESCENT
下载PDF
The Effectiveness of Peer Feedback on Second Language Writing
6
作者 Yijun Chen 《Journal of Contemporary Educational Research》 2024年第2期68-79,共12页
Peer feedback is a widely utilized practice in writing classrooms for second languages(L2)that has drawn a lot of attention.While some support the practice because of the clear advantages that peer feedback offers stu... Peer feedback is a widely utilized practice in writing classrooms for second languages(L2)that has drawn a lot of attention.While some support the practice because of the clear advantages that peer feedback offers students,others doubt its efficacy.Comparing various forms of feedback is therefore necessary,as is determining the effects that peer feedback has on students and the variables that might affect how successful peer feedback is.This paper focuses on the usefulness of peer feedback for L2 writing,based on a review of studies on the subject.The findings imply that the functions of peer and teacher feedback are distinct,and that peer feedback is advantageous to both parties,particularly to the supplier.The attitudes and cultural backgrounds of the students are among the other factors that affect how effective peer feedback is.Lastly,some implications for future research and education are presented. 展开更多
关键词 peer feedback QUALITY BENEFITS PROVIDERS RECEIVERS PERCEPTIONS TRAINING
下载PDF
A Study on the Application of Peer Feedback among EFL Students in Blended Teaching
7
作者 Zhou Xu 《Journal of Educational Theory and Management》 2024年第2期20-24,共5页
Recent years have witnessed the rise and popularity of blended teaching for EFL students,yet the lack of face-to-face communication and insufficient interaction lead researchers and educators to explore methods of imp... Recent years have witnessed the rise and popularity of blended teaching for EFL students,yet the lack of face-to-face communication and insufficient interaction lead researchers and educators to explore methods of improving the effectiveness of teaching.Peer feedback,a teaching strategy used to raise the bars by exposing instructions to a new teaching perspective to enhance students’online and offline collaboration,has received the lion’s share of attention in recent studies.On the basis of literature review,class records,and interviews,this paper,in hope of supporting advances in teachers’practice and field researches,examines the possible approaches to effectively implementing the application of peer feedback in blended teaching mode with a special focus on teachers’roles. 展开更多
关键词 peer Feedback EFL Blended Teaching
下载PDF
Peer pressure and academic stress among junior high school students:a cross-sectional study
8
作者 Rika Sarfika I Made MohYanuar Saifudin +2 位作者 Hema Malini Nursyirwan Effendi Bunga Permata Wenny 《Frontiers of Nursing》 2024年第2期191-199,共9页
Objective:The objective of the study was to explore the connection between peer pressure and academic stress among junior high school students.Methods:This descriptive correlational study was conducted to investigate ... Objective:The objective of the study was to explore the connection between peer pressure and academic stress among junior high school students.Methods:This descriptive correlational study was conducted to investigate the link between perceived peer pressure and academic stress.The study involved a total of 525 adolescents,aged 14-19 years,drawn from 6 public junior high schools(PJHS)in Padang,Indonesia,using purposive sampling.Academic stress and perceived peer pressure were assessed using the Educational Stress Scale for Adolescents(ESSA)and the Perceived Peer Pressure Scale(PPPS).Results:The findings indicated significant variations in stress levels among students in different grade levels(7th,8th,and 9th grades)(P<0.05),while there were no noteworthy differences in peer pressure across these grade levels(P>0.05).Additionally,there was a positive correlation observed between perceived peer pressure and academic stress(r=0.14,P<0.05).Furthermore,multiple regression analyses,incorporating demographic variables and perceived peer pressure as independent factors,yielded statistically significant results(adjusted R^(2)=0.082,F=4.33,P<0.001).Notably,peer pressure had a direct impact on academic stress among adolescents,with class level and parents’educational background mediating the relationship between academic stress and adolescent behavioral problems.Conclusions:These findings underscore the importance of addressing both external and internal factors at the individual,family,school,and societal levels to enhance adolescents’psychological resilience and mitigate problem behaviors. 展开更多
关键词 academic stress adolescents behavioral problem Indonesia peer pressure STUDENTS
下载PDF
Effect of peer education on knowledge,attitude,and practice of HPV infection prevention among college students
9
作者 Rong-Rong Zhang Yan Xu 《Frontiers of Nursing》 2024年第4期427-434,共8页
Objective:To explore the effect of peer education on improving the knowledge,attitude,practice level(KAP)to prevent human papilloma virus(HPV)infection among college students.Methods:The knowledge,attitude/belief,and ... Objective:To explore the effect of peer education on improving the knowledge,attitude,practice level(KAP)to prevent human papilloma virus(HPV)infection among college students.Methods:The knowledge,attitude/belief,and practice level of 536 grade I college students from a university in Shanghai were surveyed and analyzed using a self-designed questionnaire—the HPV Infection and Prevention KAP Questionnaire.Results:Many college students heard about HPV vaccine(49.70%before peer education and 100%after peer education);however,few of them were vaccinated(2.82%before peer education and 5.23%after peer education).Knowledge,attitude/belied,and practice of HPV infection prevention were positively related(P<0.05).Peer education was effective in improving college students'KAP level of HPV infection prevention(P<0.05).Conclusions:Peer education could be used as a strategy in colleges to improve student's KAP level of HPV infection prevention.College students may also be encouraged to spread their influence to society. 展开更多
关键词 cervical cancer college students Human papillomavirus KAP peer education
下载PDF
基于信誉的peer-to-peer推荐信任模型 被引量:6
10
作者 金兰芳 朱艳琴 《计算机工程与应用》 CSCD 北大核心 2007年第3期122-124,共3页
随着对等网络p2p技术的不断发展,如何在p2p各个对等点之间建立起信任关系,已成为当今p2p技术研究的一个重要课题。在研究一些现有信任模型的基础上,分析其存在的问题,提出一种基于信誉的对等网信任模型,给出了信任度计算的算法,并设计... 随着对等网络p2p技术的不断发展,如何在p2p各个对等点之间建立起信任关系,已成为当今p2p技术研究的一个重要课题。在研究一些现有信任模型的基础上,分析其存在的问题,提出一种基于信誉的对等网信任模型,给出了信任度计算的算法,并设计了一种信任查询协议,最后,通过实验验证和分析了模型的可行性和安全性。 展开更多
关键词 peer-to—peer 推荐 信任模型
下载PDF
Online International Peer Interaction:An Exploration of Impacts on Comprehensive Competencies,Global Perspectives,and Cross-Cultural Communication Skills
11
作者 Dong Wang 《Journal of Contemporary Educational Research》 2024年第7期89-94,共6页
With the increasing trend of globalization and the rapid advancement of information technology,online learning platforms such as Zoom are becoming increasingly influential in the field of education.The focus of this s... With the increasing trend of globalization and the rapid advancement of information technology,online learning platforms such as Zoom are becoming increasingly influential in the field of education.The focus of this study was the online international peer interaction based on the Zoom platform,detailing how such interaction programs are conducted and exploring in depth the specific impacts of this interaction mode on students’comprehensive competencies,global perspectives,and cross-cultural communication skills.This research not only provides new practical references for online learning and international education but also offers new research perspectives and directions for educators and researchers. 展开更多
关键词 Zoom platform International peer interaction Comprehensive competencies Global perspectives Cross-cultural communication skills
下载PDF
基于分布式聚类的Peer-to-Peer路由算法 被引量:2
12
作者 邵浩然 吴镇德 +1 位作者 王杰华 马范援 《计算机应用与软件》 CSCD 北大核心 2005年第9期12-14,129,共4页
提出了分布式聚类算法,该算法自动对地理邻近的对等结点聚类,消除了集中式聚类算法的单点瓶颈问题,及分布式Binning算法的landmark放置问题;提出了一种基于该聚类的邻居路由算法,该算法消除了na?ve算法路由效率低、IP-snoop算法实现困... 提出了分布式聚类算法,该算法自动对地理邻近的对等结点聚类,消除了集中式聚类算法的单点瓶颈问题,及分布式Binning算法的landmark放置问题;提出了一种基于该聚类的邻居路由算法,该算法消除了na?ve算法路由效率低、IP-snoop算法实现困难及处理开销大、directed算法需要处理超级节点失效时容错问题。实验结果表明,基于分布式聚类的Peer-to-Peer(P2P)路由算法比现有的结构化路由算法减少了近一倍的路由跳转和路由时延。 展开更多
关键词 peer—to—peer路由 聚类 peer-to-peer 路由算法 聚类算法 分布式 LANDMARK 瓶颈问题 算法实现 节点失效
下载PDF
分布式Peer-to-Peer网络Gnutella模型研究 被引量:23
13
作者 黄道颖 李祖鹏 +2 位作者 庄雷 黄建华 张安琳 《计算机工程与应用》 CSCD 北大核心 2003年第5期60-63,共4页
计算机对等联网(peer-to-peernetwork,P2P)技术是目前新一代网络技术研究的活跃领域,而P2P网络模型研究是P2P网络技术研究的重要环节。该文着重介绍了Gnutella网络模型的体系结构及工作原理,分析了其优缺点。并对其未来发展改进前景进... 计算机对等联网(peer-to-peernetwork,P2P)技术是目前新一代网络技术研究的活跃领域,而P2P网络模型研究是P2P网络技术研究的重要环节。该文着重介绍了Gnutella网络模型的体系结构及工作原理,分析了其优缺点。并对其未来发展改进前景进行了展望。 展开更多
关键词 分布式peer-to-peer网络 Gnutella模型 计算机对等联网 活动对等点 扩散路由
下载PDF
构造基于推荐的Peer-to-Peer环境下的Trust模型 被引量:325
14
作者 窦文 王怀民 +1 位作者 贾焰 邹鹏 《软件学报》 EI CSCD 北大核心 2004年第4期571-583,共13页
在诸如文件共享等无中心的Peer-to-Peer环境中,资源共享是用户自愿的行为.在这类系统中,由于用户不为自身的行为担负(法律)责任,因而节点间的信任关系往往很难通过传统的信任机制建立.一种更合理的考虑是参考人际网络中基于推荐的信任... 在诸如文件共享等无中心的Peer-to-Peer环境中,资源共享是用户自愿的行为.在这类系统中,由于用户不为自身的行为担负(法律)责任,因而节点间的信任关系往往很难通过传统的信任机制建立.一种更合理的考虑是参考人际网络中基于推荐的信任关系建立方法.现有的模型不能很好地解决模型的迭代收敛性问题,同时缺乏对诸如冒名、诋毁等安全性问题的考虑.针对上述问题,在节点推荐的基础上提出了一种基于Peer-to-Peer环境的信任模型,并给出了该模型的数学分析和分布式实现方法.分析及仿真表明,该信任模型较已有模型在迭代的收敛性、模型的安全性等问题上有较大改进. 展开更多
关键词 对等网络 信任 分布Hash表 冒名 诋毁
下载PDF
Peer-to-Peer网络模型研究 被引量:13
15
作者 李祖鹏 黄道颖 +1 位作者 庄雷 黄建华 《计算机工程》 CAS CSCD 北大核心 2004年第12期29-31,共3页
计算机对等联网(peer-to-peernetwork,P2P)技术是目前新一代网络技术研究的活跃领域,而P2P网络模型研究是P2P网络技术研究的重要环节。该文分析了目前两种流行P2P网络模型的不足,通过在P2P网络中引入集中和分级目录概念,根据资源内容建... 计算机对等联网(peer-to-peernetwork,P2P)技术是目前新一代网络技术研究的活跃领域,而P2P网络模型研究是P2P网络技术研究的重要环节。该文分析了目前两种流行P2P网络模型的不足,通过在P2P网络中引入集中和分级目录概念,根据资源内容建立不同的层次结构,提出了一种新型P2P网络模型。 展开更多
关键词 计算机对等联网 活动对等点 超级节点 分级目录
下载PDF
Peer-to-Peer网络中安全对等组的实现 被引量:10
16
作者 李祖鹏 赵修斌 +2 位作者 黄道颖 庄雷 黄建华 《计算机工程与应用》 CSCD 北大核心 2003年第24期51-53,59,共4页
计算机对等联网(peer-to-peernetwork,P2P)技术是目前流行于国际网络技术研究领域的一个热点,而安全问题则是P2P网络通信研究中的重要课题。通过应用JXTA技术,文章着重阐述了在P2P网络中实现安全对等组的方法及其工作机制,并在JavaTM2... 计算机对等联网(peer-to-peernetwork,P2P)技术是目前流行于国际网络技术研究领域的一个热点,而安全问题则是P2P网络通信研究中的重要课题。通过应用JXTA技术,文章着重阐述了在P2P网络中实现安全对等组的方法及其工作机制,并在JavaTM2平台上予以实现。 展开更多
关键词 计算机对等联网 JXTA技术 安全对等组 鉴权
下载PDF
应用于移动互联网的Peer-to-Peer关键技术 被引量:20
17
作者 李伟 徐正全 杨铸 《软件学报》 EI CSCD 北大核心 2009年第8期2199-2213,共15页
对现有的应用于移动互联网的P2P技术方面的研究进行了分析.首先介绍了P2P技术和移动互联网的概念,并提出将P2P技术应用在移动互联网所面临的挑战和应用模式.其次,分别针对集中式架构、超级节点体系架构和ad hoc架构对应用于互联网的P2P... 对现有的应用于移动互联网的P2P技术方面的研究进行了分析.首先介绍了P2P技术和移动互联网的概念,并提出将P2P技术应用在移动互联网所面临的挑战和应用模式.其次,分别针对集中式架构、超级节点体系架构和ad hoc架构对应用于互联网的P2P网络体系架构进行了阐述.再其次,针对移动终端的两种接入模式,分别在资源定位算法和跨层优化两个方面进行了介绍.对各关键技术的特点进行了详细的分析,指出其存在的不足.最后,对未来的工作进行了展望. 展开更多
关键词 移动互联网 peer-to-peer MOBILE AD HOC 资源定位
下载PDF
Peer-to-Peer环境下多粒度Trust模型构造 被引量:71
18
作者 张骞 张霞 +2 位作者 文学志 刘积仁 Ting Shan 《软件学报》 EI CSCD 北大核心 2006年第1期96-107,共12页
信任是多方面的,在不同的应用场景中,同一节点在不同领域具有不同的可信度.现有信任模型粒度过于粗糙,不能很好地解决同一Peer节点在不同领域、不同方面的可信度计算问题.据此,提出一种新的Peer-to-Peer环境下的多粒度信任模型,并给出... 信任是多方面的,在不同的应用场景中,同一节点在不同领域具有不同的可信度.现有信任模型粒度过于粗糙,不能很好地解决同一Peer节点在不同领域、不同方面的可信度计算问题.据此,提出一种新的Peer-to-Peer环境下的多粒度信任模型,并给出该模型的数值分析和分布式实现方法.分析及仿真结果表明,该模型与已有模型相比,在可信度计算的粒度、模型的安全性等方面有较大的提高. 展开更多
关键词 对等网络 本体 信任树 档案点 多粒度信任模型
下载PDF
基于Peer-to-Peer网络的JXTA技术研究 被引量:4
19
作者 李祖鹏 黄道颖 +2 位作者 庄雷 黄建华 刘彩霞 《计算机工程与应用》 CSCD 北大核心 2003年第11期42-44,共3页
计算机对等联网(peer-to-peernetwork,P2P)技术是一项新型网络应用技术,而JXTA技术是由Sun微系统公司推出的一项致力于为P2P应用提供所需基础服务的新技术。该文着重介绍了JXTA技术的体系结构和核心协议,分析了其可行性,并对其未来发展... 计算机对等联网(peer-to-peernetwork,P2P)技术是一项新型网络应用技术,而JXTA技术是由Sun微系统公司推出的一项致力于为P2P应用提供所需基础服务的新技术。该文着重介绍了JXTA技术的体系结构和核心协议,分析了其可行性,并对其未来发展前景进行了展望。 展开更多
关键词 计算机对等联网 JXTA技术 对等点 对等组
下载PDF
Peer-to-Peer文件共享系统的测量研究 被引量:36
20
作者 刘琼 徐鹏 +1 位作者 杨海涛 彭芸 《软件学报》 EI CSCD 北大核心 2006年第10期2131-2140,共10页
Peer-to-Peer(P2P)技术的发展引发了Internet应用模式的变革.为了寻求网络运营商、内容提供商和Internet用户三方共赢的解决方案,必须从他们各自的角度出发对P2P应用进行系统的测量与分析.首先概述了P2P测量的研究内容,并将现有的P2P测... Peer-to-Peer(P2P)技术的发展引发了Internet应用模式的变革.为了寻求网络运营商、内容提供商和Internet用户三方共赢的解决方案,必须从他们各自的角度出发对P2P应用进行系统的测量与分析.首先概述了P2P测量的研究内容,并将现有的P2P测量研究划分为P2P拓扑特征的测量、P2P流量特征的测量、P2P可用性的测量3类.在对P2P测量方法进行对比分析之后,详细综述了P2P测量的研究现状,对现有的各种测量方案以及研究成果进行了深入的分析,指出了其中存在的问题和缺陷.最后讨论了P2P测量未来的研究方向. 展开更多
关键词 对等网络 网络测量 拓扑测量 流量测量 可用性测量
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部