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  • SDSL 全双工通信 VDSL 高容量
  • Sns

    1. 1. SNS RELATIONSHIP RELATIONSHIP RELATIONSHIP RELATIONSHIP RELATIONSHIP S ocial N etwork S ervice S ocial N etwork S ite S ocial N etwork S oftware
    2. 2. <ul><li>RANDOM NETWORKS </li></ul>HOW DO YOUR FRIENDS NETWORK FORM ? Paul Erdős(1950S) The relationships among people are random. People:nodes Relationship:line
    3. 3. RANDOM NETWORKS? OR? <ul><li>Paul Erdős THINKS : </li></ul><ul><li>◆ The processes of setting relationship among people are random. </li></ul><ul><li>◆ The probabilities of people getting associations with any people are the same. </li></ul>DOES THE RANDOM NETWORK TRULY REPRESENT THE REAL WORLD RELATIONSHIP NET?
    4. 4. SIX DEGREES OF SEPARATION Six Degrees of Separation is a famous theory in the domain of MATH which founded by Stanley Milgram in 1967. ▲ You can make an association with any people through 6 people at most. METHODS 6 ASSOCIATION KNOW ACQUAINTANCE …… .. inevitability
    5. 5. RANDOM NETWORKS & SIX DEGREES OF SEPARATION ? Consider our real world’s relationship nets is random networks. Make a modle, with mathematical simulative calculation, you will find that 6 people is not enough. RANDOM NETWORKS SIX DEGREES OF SEPARATION collision WHAT’S THE PROBLEM? ------------------THE RANDOM NETWORKS CAN NOT TRULY REPRESENTS THE REAL RELATION NETWORK.
    6. 6. SMALL WORLD THEORY <ul><li>In a random network, add several associations, the lowest distances between two nodes can be decreased much. </li></ul><ul><li>In the real world, the nodes with more associations represent several people who are good at intercourse . </li></ul>Duncan Watts:
    7. 7. SMALL WORLD THEORY More researches show that, in our social network,20% people with 80% associations ensure the six degrees of separation. AN APPLIANCE OF 2/8 PRINCIPLE
    8. 8. <ul><li>RANDOM NETWORK: ■ be up to Poisson Distribution </li></ul><ul><li>■ most nodes are average linked, the averaged node degree can be seen as the scale of the network </li></ul><ul><li>SCALE-FREE NETWORK: ■ be up to Power Law </li></ul><ul><li>■ most nodes are lowly linked, few nodes are highly linked, it’s scale-free </li></ul>RANDOM NETWORK & SCALE-FREE NETWORK Barabási
    9. 9. <ul><li>▲ SCALE-FREE NETWORK grows in active. </li></ul><ul><li>▲ With new nodes added in continually , </li></ul><ul><li>unlike RANDOM NETWORK, whose nodes has been there in advance ,add associations in random. </li></ul><ul><li>▲ SCALE-FREE NETWORK, when set a new association, leans to make an association with the nodes highly linked. </li></ul><ul><li>▲ Unlike RANDOM NETWORK, whose setting association is random. </li></ul>RANDOM NETWORK & SCALE-FREE NETWORK
    10. 10. <ul><li>■ Social network site 、 Social network software supplies Social network service . </li></ul><ul><li>■ SNS help people set up his/her own social network via the Internet , via the WEB . </li></ul><ul><li>■ According to the six degrees of separation , depend on your own relationship net and your friends’ relationship net, you can extend your network unlimited . </li></ul><ul><li>■ Like search engine , SNS helps to get information in another way, but it’s more active . It’s more humanization. </li></ul>SNS----social network service
    11. 11. <ul><li>▲ It use distributed technology(P2P) to set up a platform depend on one’s calculation and bandwidth resources. </li></ul><ul><li>FOR CUSTOMS: </li></ul><ul><li>Compared with the common sites like SINA or YAHOO, common people can be a part in the SNS, not just look, and get the information. </li></ul><ul><li>For common people, SNS also give them chances to show their own things to affect others. They just need to install a SNS software or even just through the web pages. </li></ul>SNS----SNS technology IT’S A MODEL OF SHARING,NOT GETTING.
    12. 12. <ul><li>FOR Internet Content Provider: </li></ul><ul><li>They need not to possess Server cluster with Strong ability of calculation and storage. </li></ul>SNS----SNS technology 30000 servers? RIDICULOUS SNS TECHNOLOGY IS AN INIERNET CRUSH. IT’S A REVOLUTION. IT CHANGES THE OPENRATING MODE OF THE INTERNET.
    13. 13. <ul><li>Myspace 、 Cyworld </li></ul>SNS----SOCIAL NETWORK SITES Facebook 、 Kaixin FORMER LATER Real name system
    14. 14. <ul><li>From the first generation to the second generation, the social network sites import the real name system. </li></ul><ul><li>The social network sites depend much on one’s reality relation networks. The circle of trust get spraeded. It’s much reliable. </li></ul><ul><li>Although the spreading of one’s social network is invisible, but it’s really exist. </li></ul>SNS----SOCIAL NETWORK SITES
    15. 15. SNS BUSINESS----MYSPACE/FACEBOOK network networking Networking (myspace): Set a platform, let people show themselves, and make friends with people who they are interested in .It’s a process to make a new social Network. Network (facebook): Set a platform, let people show themselves, and find Friends in real life who are all the same in the platform,it depend on the real life, it spraeded the existing social network.
    16. 16. <ul><li>DONBAN(1ST) </li></ul><ul><li>XIAONEI(2ND) </li></ul><ul><li>SAME: Specific groups </li></ul><ul><li>( Fixed users ) </li></ul><ul><li>BASIC PROFITS </li></ul>SNS BUSINESS----XIAONEI/DOUBAN
    17. 17. Thank You! Thank You !