机构

• 地理科学与资源研究所 [1]
• 长春光学精密机械与物... [1]
• 自动化研究所 [1]
• 文献情报中心 [1]

采集方式

• OAI收割 [4]

内容类型

• 期刊论文 [3]
• 会议论文 [1]

发表日期

• 2024 [1]
• 2020 [1]
• 2012 [2]

学科主题

• 编辑出版 [1]

筛选

浏览/检索结果: 共4条，第1-4条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 MFM: A Multiple-Features Model for Leisure Event Recommendation in Geotagged Social Networks 期刊论文  OAI收割 ELECTRONICS, 2024, 卷号: 13, 期号: 1, 页码: 112 作者:  Wu, Yazhao;  Peng, Xia;  Niu, Yueyan;  Gui, Zhiming   |  收藏  |  浏览/下载：34/0  |  提交时间：2024/02/05 event recommendation system  EBSN  cold start  user activity  social relations   Classifying user connections through social media avatars and users social activities: a case study in identifying sellers on social media 期刊论文  OAI收割 ENTERPRISE INFORMATION SYSTEMS, 2020, 页码: 20 作者:  Mao, Yu;  Zhu, Yifan;  Liu, Yiping;  Lin, Qika;  Lu, Hao   |  收藏  |  浏览/下载：47/0  |  提交时间：2021/03/02 User profiling  avatars in social media  user activity  suspicious user detection   An index model for measuring microblog users 期刊论文  OAI收割 chinese journal of library and information science, 2012, 卷号: 5, 期号: 4, 页码: 67-76 YUAN Fuyong; FENG Jing; FU Qianqian 收藏  |  浏览/下载：43/0  |  提交时间：2012/12/11 User influence  Audience  User activity  Microblog influence   Physical layer design for free space optical communication (EI CONFERENCE) 会议论文  OAI收割 2012 International Conference on Control Engineering and Communication Technology, ICCECT 2012, December 7, 2012 - December 9, 2012, Shenyang, Liaoning, China 作者:  Wang H.;  Zhang Q.;  Guo J.;  Guo J.;  Wang H. 收藏  |  浏览/下载：31/0  |  提交时间：2013/03/25 A small size Free Space Optical Communication System is introduced  including the hardware and the hardware specified physical layer protocol. In detail  the rapid synchronization method to reduce the handshake bandwidth requirement is demonstrated. The hardware of the system includes the laser driver system  the signal amplifying and shaping system  the data interface system. The hardware specified physical layer protocol is used to interface the outer data  serialize and deserialize the data stream  check transmission errors and schedule the data transmission. The overall system is a FIFO-like system and the user can use it as if he's operating a FIFO. The system is designed mainly for terrestrial FSO link whose signal channel is the atmosphere. Due to the complex composition and activity of the atmosphere  this signal channel brings in great influence on the transmitting laser in it  for example  the absorption and scattering of the atmosphere molecules and aerosols  the scintillation of received laser power caused by the turbulence of the atmosphere  all of which results in a much higher Bit Error Rate (BER) of the communication system than wired communication systems leading to frequent resynchronization. In our system  the sampling clock is generated locally using multi-phase sampling technique rather than PLLbased clock recovery  which helps to rapid synchronization. 2012 IEEE.