Mc Kiernan in 1996 first proposed the sitation this new terminology, a reference to study the relationship between pages. Roussea links on the page that the relationship between research and citations of published articles on similar,
nike mad jibe, but not the same. His web site distribution patterns and links into web pages are analyzed, the study found that 343 of his most high-level domain names URLs obey Lotka distribution, and references to these URLs are also consistent with the Lotka distribution,
nike discount, the proportion of self-cited about 30%.
directory
web link analysis web impact factor Ingwersen obtained three interesting results related to WIF link analysis terms there are still many questions the nature of network links the current network of Web link analysis link analysis law to carry out, more or less with the determination of the network linked factors. Professor Qiu Junping, such as the major universities on the domestic (Guangdong Institute of Management Science 2002, the latest top 100 university) Web site ranking factors and the relationship between the universities were studied. Yang Tao in the In addition to these two scholars, there are a number of other scholars, made a lot of research on this area, such as Dr. Duan Yufeng in his doctoral thesis in the number of features mentioned in the web link (web link the total number of internal links pointing to the number of points the number of external links, the number of linked websites), web link distribution (link density, the average number of links page) and site impact indicators (number of sites are linked, the site factor, diffusion coefficient), which can be from different sides to illustrate the network link analysis. Web Impact Factors (Web impact factor) is Ingwersen by the concept of journal impact factors in 1998 after the site proposed for evaluating the impact on the network as a target. Ingwersen web impact factor is published in the years 1998, entitled and reliability studies were made, and he also gives the definition of Web Impact Factors: Assume a time link to the Web site or area of a particular number of pages for the a, and this web site or web page contained in the region itself number b, then the value of its network of factors can be expressed as WIF = a / b. Require attention here is mentioned in the definition of and does not refer to the number of pages and the number of links, but the number of pages and links. Through 7 countries (Norway, Britain, France, Denmark, Sweden, Finland and Japan) and 4 at the main domain name (gov, org, co m, edu) study, Ingwersen obtained three interesting conclusions 1, because Alta Vista search engine as a statistical link to a page only the number of pages rather than the number of links, so the link will not affect the network from the impact factor of the results. 4 main domain name links to Web-IF from the average value of 0.55, , the credibility of its Web-IF is much smaller. In his Web-IF calculation results can be used when changes in engine performance as the evaluation of a measure of the network. For the first two conclusions, Smith and Thelwall were also been studied,
beats by dre sale, but unfortunately a few people of their use are unstable version of the Alta Vista, and therefore, they are on the search engine coverage and performance into question . Thelwall that the existing network of factors in the practical application of the concept is only a relatively shallow reference to the conclusions and therefore there are many problems. As Thelwall on the network also has studied factors, so he has his own definition. He believes that the size of the network of factors linked to a specific area of the web site or the number and size of the site or the ratio of the region. The size of the site or region is not necessarily limited to the number of pages the site can also be used to measure other indicators, such as academic institutions to study the site can also be a number of researchers of the institution, the institution's research funding or Number of full-time students and more. Comparing these two scholars point of view, in both formulations in, Ingwersen's easier to understand some references, but references to Thelwall strict rules some, it also takes into account the special nature of network links. To study the easy-to-be, we can use research methods to promote Ingwersen,
nike shoes, he used the Alta Vista search engine in order to measure the number of linked pages. Related terms Link: refers to link to a Web page space. Such as Help pages in Alta Vista does not note the use of star numbers, but the samples showed that the literature search to the Domain: refers to top-level domain in the page. Such as Host: refers to the subdomain page, for example, cases, we can proceed as follows: D Domain: *. nz is the number of pages this space estimates. L Link: *. nz web space which is to all the links. L1 Link: *. nz / and Domain: nz or Domain: nz and link: *. nz / This is the number of self-link. L2 Link: *. nz / and not Link: nz and or Link: *. nz and not (domain: nz and link:. nz ) or the Link:. nz and not (link:. nz / and domain: nz) This refers to the number of external links. WIF Web so that we can calculate the space of three WIF: self-Link Web impact factor, measuring the test Web space the link between its pages, its value is L1 / D. External Web impact factor, measured by measuring the external link to link to Web space, the value of L2 / D. overall Web impact factor, measured all the Web space link, the value of L / D. external WIF is the Web site links to other Web space within the site, the extent of space, the external WIF Web space is the best reflection of the impact, the trend seems to follow the external WIF WIF trend. the fact that , the domain and its number of pages generally inversely proportional to external factors. As WIF is a measure of the average number of links per page, which is well received by the extent of the link, but also by the number of pages of Web space. In one study domain, the more the number of pages, the smaller the external WIF, a few pages of the external field is very WIF. Therefore, one should be cautious about extra-territorial Department of WIF, only used to compare the external WIF domain with similar characteristics. link analysis France still has many problems but there are still a lot of link analysis problems. With further research, it is increasingly found in the literature of information between the reference and the link between the network there are significant differences. For example, Stephen P. Harter and Charlotte E. Ford's study found that the network link points to electronic journals, there are nearly half a structural self-link, the value for the evaluation of the academic literature and research academic exchange behavior does not make sense; have links pointing to web pages of electronic journals, and only less than 8% of the pages are academic; Thelwall British universities by the highest number of sites linked analysis of the 100 pages, the results also show that the linked page does not reflect the number of its academic value. This allowed the researchers began Web links to rethink the most basic question of research the nature of the network link has now reached a consensus that web links and citations is completely different in nature, although the citation analysis of web links on our conduct has some stimulating, but when the reference should fully take into account the differences that exist between, on the results obtained using this method should be handled accordingly. Some scholars pointed out that by distinguishing different types of links, given different weights, strictly limited to their use and improved search engine performance or professional development tools for link analysis and other methods, can improve the effect of link analysis. entries Atlas Atlas more extended reading: 1
Dong. Web site evaluation method [J]. intelligence Theory and Practice, 2005,
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