P 2P(peer to peer)网络已经得到日益广泛的使用。但是如何建立Peer之间的信任关系,却一直没有很好的解决方案。该文使用两种表——局部信任表和全局名誉表,提出了一种方案——P 2P trust:每个节点保存与其交易过的一些服务质量好的节...P 2P(peer to peer)网络已经得到日益广泛的使用。但是如何建立Peer之间的信任关系,却一直没有很好的解决方案。该文使用两种表——局部信任表和全局名誉表,提出了一种方案——P 2P trust:每个节点保存与其交易过的一些服务质量好的节点的局部信任值,组成局部信任表,同时每个节点保存另外几个节点的全局名誉表,并且引入朋友机制,这样就结合了局部名誉表和全局名誉表各自的优点。P 2P trust可以解决冒名、协同作弊等问题,模拟结果表明该方案有很强安全性和较好可扩展性,并且运行开销相对比较小。展开更多
Recent years have witnessed the tremendous development of social media, which attracts a vast number of Internet users. The tweets these users posted provide an effective way of understanding user behaviors. A large a...Recent years have witnessed the tremendous development of social media, which attracts a vast number of Internet users. The tweets these users posted provide an effective way of understanding user behaviors. A large amount of previous work benefits from mining user interest to make friend recommendation. However, the potentially strong but inconspicuous relation between location and interest interaction among social media users is overlooked in these studies. Different from the previous researches, we propose a new concept named neighbor-based friend recommendation （NBFR） to improve the friend recommendation results. By recommending surrounding users who have similar interest to each other, social media users are provided a unique opportunity to interact with surrounding people they may want to know. Based on this concept, we first mine users＇ interest from short tweets, and then propose to model the user interest with multiple topics under the hypercube structure for friend recommendation. At the same time, we also offer a topic matching shortcut algorithm for more extensive recommendation. The evaluations using the data gathered from the real users demonstrate the advantage of NBFR compared with the traditional recommendation approaches.展开更多
1 When I was about to go to China,I was so fasci⁃nated that I completely forgot about the food I would be eating during my stay.It wasnt until my Chinese friend brought out chopsticks and told me to practise using the...1 When I was about to go to China,I was so fasci⁃nated that I completely forgot about the food I would be eating during my stay.It wasnt until my Chinese friend brought out chopsticks and told me to practise using them that I realized how difficult it was.My friend laughed,but I had so many questions in my mind.Why dont the Chinese have proper cutlery(餐具)?I had never seen Chinese people using spoons in movies,only chopsticks.I mentally prepared myself for the chopstick journey ahead.展开更多
Founded in 1893,Ecole Hoteliere de Lausanne is widely recognized as the best hospitality school in the world.It was here that Bastien Ciocca met Andrew Ho.Graduating from a prestigious Swiss hospitality school is how ...Founded in 1893,Ecole Hoteliere de Lausanne is widely recognized as the best hospitality school in the world.It was here that Bastien Ciocca met Andrew Ho.Graduating from a prestigious Swiss hospitality school is how one gets the chance to enter the world of premium hotels.Shangri-La Group drafted Ciocca while his Hongkongnese friend Ho was picked to play for Grand Hyatt.展开更多
FROM May 5 to 10,Chinese President Xi Jinping paid state visits to France,Serbia,and Hungary.Being his first European trip in about five years,it consolidated China’s relationships with the three countries and Europe...FROM May 5 to 10,Chinese President Xi Jinping paid state visits to France,Serbia,and Hungary.Being his first European trip in about five years,it consolidated China’s relationships with the three countries and Europe as a whole.The four states looked back on the history of their friendships,signed multiple cooperation agreements,and reached a consensus on promoting stable and sound development of China-Europe relations.Great Minds Think Alike Upon his arrival in Paris on May 5,President Xi Jinping received a warm welcome in Chinese from Gabriel Attal,France’s youngest ever modern prime minister.展开更多
Felixand Jasper aregood friends.They are always happy to help eachother.What makes you a good Fiona Tsang friend?In a small town,Felix and Jasper have a vegetable garden.Felix is growing tomatoes.Jasper is taking care...Felixand Jasper aregood friends.They are always happy to help eachother.What makes you a good Fiona Tsang friend?In a small town,Felix and Jasper have a vegetable garden.Felix is growing tomatoes.Jasper is taking care of potatoes.They want to grow fresh vegetables for their neighbors.展开更多
My name is Li Lu.I have a good friend.Her name is Kitty.Kitty likes sports very much.She has a football and a basketball,two shuttlecocks and five pingpong balls.But she doesn't have volleyballs or baseballs.Kitty...My name is Li Lu.I have a good friend.Her name is Kitty.Kitty likes sports very much.She has a football and a basketball,two shuttlecocks and five pingpong balls.But she doesn't have volleyballs or baseballs.Kitty often plays ping-pong with her classmates at school.展开更多
Patricia Muller asked the tattoo artisttoinktwo Chinesecharacters,mulan(沐兰),on her left wrist.Initially,the German tourist entered the Beijing tattoo parlor on March 3 intending to get it done on her heel.But her Ch...Patricia Muller asked the tattoo artisttoinktwo Chinesecharacters,mulan(沐兰),on her left wrist.Initially,the German tourist entered the Beijing tattoo parlor on March 3 intending to get it done on her heel.But her Chinese friend Jieyi and the tattoo artist advised against it.展开更多
基金This work was supported by the National Natural Science Foundation of China under Grant Nos. 61103227, 61172185, 61272526, 61472068, and 61173171, the China Postdoctoral Science Foundation under Grant No. 2014M550466, the Introduced Research Funds for Tianjin Normal University under Grant No. 5RL133, and the Tianjin Research Program of Application Foundation and Advanced Technology under Grant No. 15JCQNJC01400.
文摘Recent years have witnessed the tremendous development of social media, which attracts a vast number of Internet users. The tweets these users posted provide an effective way of understanding user behaviors. A large amount of previous work benefits from mining user interest to make friend recommendation. However, the potentially strong but inconspicuous relation between location and interest interaction among social media users is overlooked in these studies. Different from the previous researches, we propose a new concept named neighbor-based friend recommendation （NBFR） to improve the friend recommendation results. By recommending surrounding users who have similar interest to each other, social media users are provided a unique opportunity to interact with surrounding people they may want to know. Based on this concept, we first mine users＇ interest from short tweets, and then propose to model the user interest with multiple topics under the hypercube structure for friend recommendation. At the same time, we also offer a topic matching shortcut algorithm for more extensive recommendation. The evaluations using the data gathered from the real users demonstrate the advantage of NBFR compared with the traditional recommendation approaches.
文摘1 When I was about to go to China,I was so fasci⁃nated that I completely forgot about the food I would be eating during my stay.It wasnt until my Chinese friend brought out chopsticks and told me to practise using them that I realized how difficult it was.My friend laughed,but I had so many questions in my mind.Why dont the Chinese have proper cutlery(餐具)?I had never seen Chinese people using spoons in movies,only chopsticks.I mentally prepared myself for the chopstick journey ahead.
文摘Founded in 1893,Ecole Hoteliere de Lausanne is widely recognized as the best hospitality school in the world.It was here that Bastien Ciocca met Andrew Ho.Graduating from a prestigious Swiss hospitality school is how one gets the chance to enter the world of premium hotels.Shangri-La Group drafted Ciocca while his Hongkongnese friend Ho was picked to play for Grand Hyatt.
文摘FROM May 5 to 10,Chinese President Xi Jinping paid state visits to France,Serbia,and Hungary.Being his first European trip in about five years,it consolidated China’s relationships with the three countries and Europe as a whole.The four states looked back on the history of their friendships,signed multiple cooperation agreements,and reached a consensus on promoting stable and sound development of China-Europe relations.Great Minds Think Alike Upon his arrival in Paris on May 5,President Xi Jinping received a warm welcome in Chinese from Gabriel Attal,France’s youngest ever modern prime minister.
文摘Felixand Jasper aregood friends.They are always happy to help eachother.What makes you a good Fiona Tsang friend?In a small town,Felix and Jasper have a vegetable garden.Felix is growing tomatoes.Jasper is taking care of potatoes.They want to grow fresh vegetables for their neighbors.
文摘My name is Li Lu.I have a good friend.Her name is Kitty.Kitty likes sports very much.She has a football and a basketball,two shuttlecocks and five pingpong balls.But she doesn't have volleyballs or baseballs.Kitty often plays ping-pong with her classmates at school.
文摘Patricia Muller asked the tattoo artisttoinktwo Chinesecharacters,mulan(沐兰),on her left wrist.Initially,the German tourist entered the Beijing tattoo parlor on March 3 intending to get it done on her heel.But her Chinese friend Jieyi and the tattoo artist advised against it.
