作者:雅虎搜索Antispam小组
链接到底对搜索引擎影响有多大呢?
非常大。通过分析链接关系来判断静态网页质量是搜索引擎技术的一个进步,目前的主流搜索引擎在考虑结果排序时仍然会参考链接关系,虽然它只是上百个参数中的一个。但是,由于业界对链接关系的公关宣传效果,使得站长们在制作网站时舍本逐末,纷纷采用基于链接的作弊方式试图提高网站在搜索结果的排名。所以,针对链接的作弊一直是搜索引擎们面临的严峻考验:如何在给“优质链接”更高权重的同时,给那些“人造的恶意链接”以严厉惩处,成了搜索引擎的重要工作。
为保证用户的搜索体验,雅虎搜索今年以来,已经对这些通过“人造恶意链接”获得排名的网站,包括对通过留言本、论坛、以及BLOG等群发URL试图获得排名提高的网站进行了降权,以遏制群发作弊软件的泛滥,还互联网一个干净公平的“搜索环境”。
不过,对那些希望合理优化网站链接的朋友,雅虎搜索给您提几个关于交换链接的建议:
1、投放链接的时候请获得对方站长的同意。
2、不要在留言簿、BLOG、BBS等页面群发链接,这不但不会从搜索引擎获得排名,还可能会被搜索引擎惩罚!
3、管理好自己网站的交互页面,减少被恶意人造群发链接污染的机会。
4、谨慎选择链接对象,注重链接质量,远离坏邻居。和那些已经受到惩罚的网站建立链接,是很危险的!
一言以蔽之,我们提倡的是高质量内容网站之间的合理链接,但对那些利用链接作弊的行为一定会有严厉的处罚。欢迎对链接优化感兴趣的站长朋友都能发表自己的看法,参加到链接问题的讨论中来。
(现在是广告时间)
如果你对海量数据有较强的分析处理能力,能够透过数据发现一些潜在的问题;
如果你有超强的逻辑推理能力,能够敏锐的寻找到支持你论据的特征值,还原案发现场;
如果你对 SEO 或者点击器有一定的了解,做过这方面的探索研究或者是实践;
如果你曾经是一名站长,厌倦了江湖争斗,希望成为网络秩序的捍卫者...
那么你就是我们最合适的人选,我们诚邀你加盟我们(雅虎中国)的竞价防作弊Team,还我们的客户一个明亮纯洁的广告投放空间。
如果你不具备以上的条件,只要你有一颗正直的心,同时有希望成长为一个经验丰富的网络安全卫士的决心和勇气。当你具备以下技能后,你仍然可以加入我们的队伍。
1. 1 年以上工作经验。
2. 半年以上 Linux 使用经验。
3. 开发语言:Perl/PHP/Shell,熟练掌握其中至少1种。
4. 了解 HTML/JavaCcript 网站制作技术,具有网站制作、开发经验。
5. 有过海量(百万以上)数据统计、分析经验更佳。
6. 有一定的沟通能力,具有协同工作经验。
来吧!惩恶扬善,维护世界和平的重任就落在你的肩上了!
此时此刻,非你莫属!
感兴趣的朋友给我发电子邮件吧: dbanotes@gmail.com
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You use Bloglines because it helps you keep track of your favorite blogs and feeds. But what if you have certain feeds you view only in the morning? Certain feeds you look at to cheer you up, or when the boss isn't around? You don't want to re-arrange your whole "My Feeds" listing just for those occasional whims or times of day. That's why Bloglines introduces not one, but two new services to make things easier.
Playlists lets you create short groupings of feeds to access from your main list. Create as many as you like, and use them to personalize your Bloglines experience that much more. Create them, change them, even delete them--all without changing your original "tree" of feeds. What song playlists are to your MP3 library, Bloglines Playlists are to your Bloglines blogs & feeds.
Want a quick look of those Playlists you just created? That's what Glimpse is for. Click on one of your Playlists in your left nav and you'll see the first five posts for every feed in that Playlist. Don't like the order of your feeds? Drag and drop 'em until you do. It's easy. Plus, you can set one Playlist up as a default--and it'll be the first thing you see every time you launch Bloglines.
Playlists and Glimpse are two more ways we're working to make your Bloglines experience easier--and just maybe, a little more fun. Have any questions? Let us know!
-- The Bloglines Team
while the content of the slide is clearly shocking & thus the actual subject of the news story, I was also intrigued by the visual design of the presentation. a color-coded bar chart is used to illustrate an “Index of Civil Conflict", while a list of abstract color-coded icons (i.e. triangles, squares & arrows) & summarized textual facts 'decorate' the left side of the screen. how effective is this slide in communicating the actual situation, & the data on which it relies?
see also Tufte's essay about the quality & credibility of informational Powerpoint presentations.
[link: nytimes.com & commondreams.org]
a visual animation showing the 'hub and spoke' logistics system of FedEx over a period of 1-2 days.
see also flight pattern map & live airport monitor & celestial mechanics.
[link: youtube.com|via atlassian.com]