排序方式： 共有51条查询结果，搜索用时 31 毫秒
1.
Comparing rankings of search results on the Web 总被引：1，自引：0，他引：1
The Web has become an information source for professional data gathering. Because of the vast amounts of information on almost all topics, one cannot systematically go over the whole set of results, and therefore must rely on the ordering of the results by the search engine. It is well known that search engines on the Web have low overlap in terms of coverage. In this study we measure how similar are the rankings of search engines on the overlapping results.We compare rankings of results for identical queries retrieved from several search engines. The method is based only on the set of URLs that appear in the answer sets of the engines being compared. For comparing the similarity of rankings of two search engines, the Spearman correlation coefficient is computed. When comparing more than two sets Kendall’s W is used. These are well-known measures and the statistical significance of the results can be computed. The methods are demonstrated on a set of 15 queries that were submitted to four large Web search engines. The findings indicate that the large public search engines on the Web employ considerably different ranking algorithms. 相似文献
2.
在预防与抑制大学生违法犯罪的过程中,道德具有十分重要的作用。良好的社会公德意识是预防和抑制大学生违法犯罪的基础保证,中华民族优良道德传统资源具有不可或缺的珍贵价值。特别注重整体利益,强调对社会的责任意识;推崇“仁爱”原则,追求人际和谐;讲求谦敬礼让,强调克骄防矜;重视道德践履,强调修养的重要性等,这些都对预防、减少和抑制大学生违法犯罪有着重要的理论价值和现实意义。 相似文献
3.
4.
In recent years there has been an intense debate in many countries concerning the best approach to improving schools. The various methods being tried might be reasonably seen as constituting a continuum ranging from strict external control and inspection at one end, to self-evaluation and internal regulation at the other. In practice, most education systems appear to be moving towards a combination of these methods, involving a degree of external monitors of internal self-evaluation mechanisms. This article analyses the gradual emergence in the Irish education system of such an accommodation. It charts the increased emphasis being placed upon school self-evaluation and argues that it does constitute the best way forward. However, it also highlights a major lacuna at the heart of the emerging system, namely the lack of firm data on which schools can really base effective improvement strategies. 相似文献
5.
6.
7.
8.
9.
10.