Google搜索引擎的排名原则
您知道Google一共参考了多少个排名的原则么？在google的网站里面，Google自己承认超过100个，但是实际上呢？告诉各位绝对不是只有100个，举个例子，时间因素没有提，镜像因素没有提，重复问题没有提，网页结构没有提，中文的处理方式更不可能提了（其实google对中文的处理还是很幼稚的）......，其实Google绝对不会把他们的家底透漏出来，否则Google就不用混了。
各位可以在Google的网站里面找到以下他们承认的一些因素。
End User Features
• Google quality and ranking For each queryGoogle factors in 100 variables including anchor text URL patterns fonts and positioning data to calculate relevance. • Dynamic page summaries Search result summaries contain dynamically generated snippets of text that show how your query was used on the page. • Results grouping Multiple results from the same subdirectory are grouped together making search results easier to read quickly. • Automatic spellchecker Google's self-learning spellchecker automatically detects misspellings and suggests corrections. Using technology developed by Google it is far more accurate than industry standard software. • Cached pages Caches copies of every page in your index so search results can be viewed when the original sites are down. • Hit highlighting Query terms are highlighted on cached pages allowing users to quickly find which parts of a page are relevant to their queries. • View as HTML Non-HTML search results are automatically reformatted as HTML enabling users a quick glimpse at the content without having to launch the original application in which the content was created. • Sort by date Enables users to get at time-sensitive information first. Dates can be identified in any international format. • Advanced boolean search Offers more than 10 special query terms for advanced search functionality and supports Boolean AND OR and NOT searches.
Administrator Features
• Web-based Admin Console The admin console supports multiple logins and administrative roles for crawling serving and monitoring with an intuitive easy-to-use interface. • Subcollections Categorize searches according to URL patterns. • Synonyms Define synonyms for company-specific acronyms or terminology and have those terms be displayed as suggested alternative queries. • Keymatch Define matches between URLs and keywords so that the targeted URL displays above the main set of search results. • Look and Feel Search results customizable using XSLT stylesheets. • Reporting Web-based reports show daily and hourly result sets top queries special feature usage and more. Easily export the reports for use in other reporting tools. • URL Tracking Analyzes all crawled content and hosts making it easy for administrators to identify problematic servers errors and sources of content. • Remote Diagnostics Comes equipped with a modem connection for remote maintenance by Google support if necessary.
Enterprise Integration
• Web Servers The Google Search Appliance maps all the web documents on your network accessible via hypertext transfer protocol (HTTP) in a process known as crawling then creates an index of those documents. • Secure Search The Google Search Appliance has the capability to crawl password-protected areas and HTTPs content. Secure information protected by basic authentication or NTLM is shown only to users who have access authorization. • Proxy Servers Crawls content located behind proxy servers. • Lotus Domino Fast efficient crawling of Lotus Domino servers. • Meta Tags Supports standard meta tag fields enabling search narrowing and filtering based on meta tag values. Also can return meta tag data for display in search results. • File Types Search more than 200 file types including HTML Microsoft Office™ PDF PostScript WordPerfect Lotus and many others. • Languages Able to restrict searches to any one of 28 languages.
实际上，几乎每个月Google都在改变算法，如果没有坚持每个月都深入了解，不出三个月就被Google剔出专家的行列了，这也是为什么国内没有几个人愿意深入研究的原因了。
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