共查询到19条相似文献，搜索用时 265 毫秒
1.
网络影响因子的三大缺陷探析 总被引：2，自引：0，他引：2
在国内外网络影响因子相关研究的基础上,分析网络影响因子的三大缺陷:其一,网络影响因子的适用性差;其二,网络影响因子算法自身存在缺陷;其三,网络影响因子的假设前提难以成立.基于这三大缺陷,笔者认为,充分了解网站内部结构之后,可提出Pagerank的修正算法用于网站影响力评价. 相似文献
2.
链接分析与引文分析的比较 总被引：13，自引：1，他引：12
网络影响因子沿用了期刊影响因子对引文分析的基本思路,但作为链接分析的指标,用于网络环境中的质量评价是不可靠的。可以根据Pagerank算法提出用于论文质量评价的Pagerank算法;可以根据引文衰减系数提出"链接衰减系数"和"平均链接时距"用于研究网页的老化规律。理想的链接分析工具应当是一种专用搜索引擎。 相似文献
3.
链接指标用于网站评价的缺陷分析 总被引：2，自引：0，他引：2
在介绍网站评价与链接指标的相关内容后,详细分析了入链数、网络影响因子、Pag.erank算法等链接指标用于网站评价时存在的缺陷:其一,链接指标的"第一假设前提"成立的可能性仅20%左右;其二,商业搜索引擎(Google、Ahavista、Alltheweb等)难以准确获取链接指标值;其三,链接处于动态平衡中,链接指标用于网站评价时,将破坏"链接平衡态". 相似文献
4.
中国省级政府网站的影响力评价--网站链接分析及网络影响因子测度 总被引：28，自引：0，他引：28
文章运用链接分析方法和网络影响因子测度方法,对我国省级政府网站的影响力进行了评价同时将链接分析和网络影响因子测度结果与各省市自治区信息化水平总指数进行了比较,发现站外链接量、网络影响因子和访问量在省级政府网站影响力评价方面具有重要意义,并探讨了它们在网站评价方面的应用效能和边界条件. 相似文献
5.
中美两国医院网站网络影响力指标对比评测研究 总被引：5，自引：0，他引：5
朱雷 《现代图书情报技术》2006,1(3):64-67
采用两种传统的网络影响因子：总网络影响因子（WIFt）、外部网络影响因子（WIFe）以及三种改进后的网络影响因子：门诊量网络影响因子（WIFo）、医务人员网络影响因子（WIFd）、病床数网络影响因子（WIFb）对中、美两国部分综合实力排名靠前的医院网站的网络影响力进行测度和分析，通过WIF值及各种统计学方法判断医院网站在网络空间中影响力的大小是否与医院实力排名存在相关，并根据研究结果探讨网络影响因子是否能作为评判医院类型网站在网络空间影响力大小的指标。 相似文献
6.
数字出版网络影响因子研究 总被引：1，自引：0，他引：1
网络影响因子是某一时刻链接到网络上某一特定网站或区域的网页数与这一网站或区域本身所包含的网页数的比值,可以用于对期刊网站进行评价.搜索引擎有AltaVista、Fast、Coogle.通过开发专业搜索引擎来完善网络影响因子的计算. 相似文献
7.
中文期刊影响因子与网络影响因子和外部链接数的关系研究 总被引：49，自引：2，他引：47
学术期刊是科学信息的重要载体,而Internet是方便信息交流的新兴场所.因此,现在越来越多的学术期刊建立了自己的网站,于是期刊网站的评价也越来越受到人们的关注.本文以部分工程类中文期刊为例,利用AllTheWeb搜索它们网站的外部链接数,并计算其网络影响因子,然后将中国科学技术信息研究所(ISTIC)2001年底公布的2000年期刊影响因子与它们一一对应比较,发现期刊的影响因子与期刊网站的网络影响因子和外部链接数之间均存在着有意义的相关关系,因此,网站的外部链接数和网络影响因子均可作为网站评价的重要指标. 相似文献
8.
通过计算网络影响因子对站点进行评价,着重介绍网络影响因子(WIF)在网络计量学中的具体应用。利用搜索引擎AltaVista对中国知名大学网站WIF的测评及其改进进行分析,并就网络影响因子作为网站评价工具的客观性问题进行了探讨。最后介绍了几种增加WIF可靠性的方法。 相似文献
9.
网络影响因子实证研究:基于不同搜索引擎的大学网站影响力分析 总被引：11，自引：0，他引：11
利用AltaVista、Fast、Google 3种搜索引擎在不同时间对中国大陆10所大学的总网络影响因子进行对比分析,其结果表明:网络影响因子的有效性和可靠性除受其本身定义的局限外,还受到搜索引擎性能的影响;目前根据网络影响因子来分析各大学网站的影响力,并以此来对各大学的综合实力进行排名的做法尚缺乏足够的科学依据。 相似文献
10.
通过计算网络影响因子对站点进行评价,着重介绍网络影响因子(WIF)在网络计量学中的具体应用。利用搜索引擎AltaVista对中国知名大学网站WIF的测评及其改进进行分析,并就网络影响因子作为网站评价工具的客观性问题进行了探讨。最后介绍了几种增加WIF可靠性的方法。 相似文献
11.
[目的/意义]基于知识方程等布鲁克斯相关情报学思想及定量方法,提出可用于指导企业竞争情报工作的竞争情报增值公式I[P]+ΔA=I[P+ΔP]。[方法/过程]在公式基础上提出企业竞争情报工作的评价指标体系,并引入布鲁克斯提到的一些情报学定量分析方法,对部分指标的定量化分析进行举例。结合知识方程的描述对象及定义,对竞争情报增值公式做进一步表述。[结果/结论]竞争情报增值公式不仅可以用于企业的竞争情报工作的分析评估,还因其描述了企业竞争情报与情报竞争力之间的关系,对于企业情报竞争力的评测具有一定意义。 相似文献
12.
Catherine Arnott Smith 《Journal of the Medical Library Association》2005,93(1):53-60
Question: What is the real value that medical librarians bring to the health care environment? How have library science educators, frequently former practitioners themselves, responded to the challenge of expert searching?Methods: In this paper, I give an historical introduction to the landscape of medical information retrieval through the development of MEDLINE. I then look at the evolution of training in online searching and its place in the context of library school education and particularly the effect of generalist education on future specialists. Finally, I acknowledge the new role of the informationist as another assertion of our professional expertise.Conclusions: The three interdependent subsystems of our professional machine—our schools, our association, and our professional peers— must all respond to this challenge by asserting our expertise in our curricula, in our continuing education, and in our dialogues with each other. Only by acknowledging the interaction of these subsystems will real and positive changes be effected to benefit our profession and our constituencies. 相似文献
13.
《Visual Communication Quarterly》2013,20(2):66-89
In his quest to become the best possible scholar of California farmworkers, Richard Steven Street put academic life on hold and spent 30 years as an agricultural photographer. This memoir recounts how Street developed his method for gathering visual and verbal information for his books. Street argues that when a person strays from the anointed path, one surprise follows another, no formula fits all, and one acquires an appreciation for life's contradictions. 相似文献
14.
Michael W. Kramer 《Journal of Applied Communication Research》2018,46(1):74-92
This autoethnography explores my communication surrounding the stress I experienced from perceived role incompatibilities between my role portraying a reprehensible character in a theater production and my roles as a scholar, administrator, and church member. I examine the messages that led me to believe that there were role incompatibilities that would lead to negative evaluations of my participation in the production, and the communication strategies I used to manage my self-disclosure concerning those role incompatibilities. I explore how people I informed responded to my participation. Finally, I discuss how I use similar communication strategies – strategic silence, strategic disclosures, and strategic ambiguity – to manage self-disclosure concerning another role incompatibility issue, my political views. I hope sharing my experience assists others facing similar role management issues. 相似文献
15.
Divine Will and its Extensions: Communicative Functions of maašaallah in Colloquial Jordanian Arabic
《Communication monographs》2012,79(4):480-499
This study examines the communicative functions of the Arabic religious formula maa?aallah in light of speech act theory, Gricean maxims, and Brown and Levinson's politeness model. Analysis of 500 instances of this formula in a variety of naturally occurring settings in colloquial Jordanian Arabic shows that the expression, as an extension of its semantic value of expressing divine will, is used as an invocation, a compliment, an expression of gladness, an expression of modesty, a marker of sarcasm, and as a conversational backchannel. The data suggest that this formula is also used as a mitigating device, whereby it is used to soften face threatening acts such as refusal, complaint and criticism. It is concluded that this formula serves as a membership marker whose use marks the speaker as a social insider who avoids acting in a way that would invite the “evil eye.” 相似文献
16.
The journal impact factor (JIF) is the average of the number of citations of the papers published in a journal, calculated according to a specific formula; it is extensively used for the evaluation of research and researchers. The method assumes that all papers in a journal have the same scientific merit, which is measured by the JIF of the publishing journal. This implies that the number of citations measures scientific merits but the JIF does not evaluate each individual paper by its own number of citations. Therefore, in the comparative evaluation of two papers, the use of the JIF implies a risk of failure, which occurs when a paper in the journal with the lower JIF is compared to another with fewer citations in the journal with the higher JIF. To quantify this risk of failure, this study calculates the failure probabilities, taking advantage of the lognormal distribution of citations. In two journals whose JIFs are ten-fold different, the failure probability is low. However, in most cases when two papers are compared, the JIFs of the journals are not so different. Then, the failure probability can be close to 0.5, which is equivalent to evaluating by coin flipping. 相似文献
17.
科技文献经典老化模型的新修正 总被引：12，自引：0，他引：12
科技文献老化的经典模型,负指数模型和ＢｕｒｔｏｎＫｅｂｌｅｒ公式存在着密切联系,在分析其密切联系的基础上,提出了它们的一个新修正式,并利用统计检验的方法验证了新模型的合理性和比原模型更高的拟合度。 相似文献
18.
Elihu Katz 《Mass Communication and Society》2014,17(4):454-463
To achieve “deliberative democracy,” Gabriel Tarde's formula not only demands the press hold a nation together, but also offers an agenda of issues that serves as a kind of menu for discussions in cafés and salons, which leads, in turn, to more considered opinions, and thus provides the consensual valuations that inform political, economic and aesthetic actions. The elements of the formula consist of press, conversation, opinion, and action. I argue that the long-run effect of the mainstream media—the newspaper, but even more the radio and television— moved politics off the street and into the home, hence the concern over “the narcotizing dysfunction” of the news media. In the era of the Internet, I argue that media—old or new, mass or social—are far from being the whole of the story. It is some combination of these media, plus word of mouth, plus some rather well-known elements of social-movement theory, plus the social psychology of collective behavior that help to explain. But let us not lose sight of the different functions served by the different media. If the mass media—newspapers, radio, and television—may be said to have moved people “inside,” the social media, so called, serve to mobilize, and may bring them “outside,” again. 相似文献
19.
Robert J. Razzante 《Communication Studies》2018,69(4):389-403
Through this study I attempt to extend cocultural theory toward a dominant group theory. I offer an exploratory account of the many ways dominant group members have responded to the concerns of cocultural group members. That is, dominant group members tend to engage in strategies that produce four themes: (a) using dominant group membership for reinforcement of privilege, (b) coming to a dominant group awareness, (c) using dominant group membership for support of cocultural groups, and (d) using dominant group membership for disrupting practices of oppression. When taken together, cocultural theory and a dominant group theory afford researchers, teachers, and practitioners another tool to explore intersectional communication. 相似文献