With the development of Intemet technology, various kinds of network link show up, from common links to deep links, from the web to mobile client. Many platforms named the deep links banner aggregation service emerged...With the development of Intemet technology, various kinds of network link show up, from common links to deep links, from the web to mobile client. Many platforms named the deep links banner aggregation service emerged gradually. The deep linking has brought convenience to the public and also caused a lot of copyright infringement problems. This paper expounds the identification of infringement of the deep linking information transmission on internet and the identification of infringement of the right of reproduction, furthermore analyzing three kinds of applicable standards to determine interact information transmission behavior. Finally, we should gradually get rid of the dependence on server standard applicable, auxiliary for the substantive alternative standard, and gradually complete the substantive alternative standard.展开更多
There is growing global interest in establishing free-space optical(FSO)communication links,such as groundsatellite links(GSLs)of at least hundreds of kilometers,intersatellite links of thousands of kilometers,and fut...There is growing global interest in establishing free-space optical(FSO)communication links,such as groundsatellite links(GSLs)of at least hundreds of kilometers,intersatellite links of thousands of kilometers,and future deep space links of much greater dimensions.Enabling outdoor wireless FSO communication systems to be utilized during daylight hours can increase their availability in space-air-ground networks;however,this is usually accompanied by incoherent background radiation that impairs the signal-to-noise ratio(SNR)and bit error rate(BER).Therefore,a preliminary review of the background noise is required before constructing ground terminals with a suitable SNR in a harsh environment with high levels of solar noise.Herein,we evaluated the background noise that sunlight provides to ground terminals and quantitatively examined its impact on the SNR,communication performance,and beacon detection accuracy of the developed all-free-space ground terminal.Furthermore,we present the results of a daytime demonstration of a 7-km terrestrial free-space optical communication link by employing our ground terminal that was designed based on these analyses.The results verified that 2.5-Gbps data transmission up to 7 km is feasible,even in expected daytime satellite tracking scenarios with high background noise,by the developed system with spectral and spatial filtering to achieve an acceptable SNR.The background noise results of our research are anticipated to further the research on quantum communication networks,light detection and ranging(LiDAR),and green energy technologies.展开更多
文摘With the development of Intemet technology, various kinds of network link show up, from common links to deep links, from the web to mobile client. Many platforms named the deep links banner aggregation service emerged gradually. The deep linking has brought convenience to the public and also caused a lot of copyright infringement problems. This paper expounds the identification of infringement of the deep linking information transmission on internet and the identification of infringement of the right of reproduction, furthermore analyzing three kinds of applicable standards to determine interact information transmission behavior. Finally, we should gradually get rid of the dependence on server standard applicable, auxiliary for the substantive alternative standard, and gradually complete the substantive alternative standard.
文摘There is growing global interest in establishing free-space optical(FSO)communication links,such as groundsatellite links(GSLs)of at least hundreds of kilometers,intersatellite links of thousands of kilometers,and future deep space links of much greater dimensions.Enabling outdoor wireless FSO communication systems to be utilized during daylight hours can increase their availability in space-air-ground networks;however,this is usually accompanied by incoherent background radiation that impairs the signal-to-noise ratio(SNR)and bit error rate(BER).Therefore,a preliminary review of the background noise is required before constructing ground terminals with a suitable SNR in a harsh environment with high levels of solar noise.Herein,we evaluated the background noise that sunlight provides to ground terminals and quantitatively examined its impact on the SNR,communication performance,and beacon detection accuracy of the developed all-free-space ground terminal.Furthermore,we present the results of a daytime demonstration of a 7-km terrestrial free-space optical communication link by employing our ground terminal that was designed based on these analyses.The results verified that 2.5-Gbps data transmission up to 7 km is feasible,even in expected daytime satellite tracking scenarios with high background noise,by the developed system with spectral and spatial filtering to achieve an acceptable SNR.The background noise results of our research are anticipated to further the research on quantum communication networks,light detection and ranging(LiDAR),and green energy technologies.
