Showing 1,441 - 1,460 results of 29,875 for search '"communications"', query time: 0.08s Refine Results
  1. 1441

    The key technologies of millimeter wave MIMO communication system in space information network by Xin-ying MA, Zhi CHEN, Si MA, Jun FANG

    Published 2017-10-01
    “…With the rapid development of space information network and the increasing expansion of mankind activity,the requirements of communication quality become higher between mobile satellites and earth stations.In order to meet the demands of high data rate,large capacity and broadband real-time communication,applying millimeter wave frequency band to mobile satellite communication system has attracted great attention.Beamforming,tracking and channel estimation were introduced in millimeter wave MIMO system to fully understand the challenges of space information network which will face in the future.…”
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  2. 1442

    An Evolutionary Game Analysis on Public Information Communication between the Government and the Public in China by Hongsen Luo, Ying Gao, Fulei Shi

    Published 2021-01-01
    “…Based on the perspective of communication, we divide the government into two ways to release public information, that is, mass communication and personalized recommendation. …”
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  3. 1443

    A Survey of Open Source Products for Building a SIP Communication Platform by Pavel Segec, Tatiana Kovacikova

    Published 2011-01-01
    “…The Session Initiation Protocol (SIP) is a multimedia signalling protocol that has evolved into a widely adopted communication standard. The integration of SIP into existing IP networks has fostered IP networks becoming a convergence platform for both real-time and non-real-time multimedia communications. …”
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  4. 1444

    Communication in Neglected Tropical Diseases' elimination: A scoping review and call for action. by Claudia Nieto-Sanchez, David M Hatley, Mario J Grijalva, Koen Peeters Grietens, Benjamin R Bates

    Published 2022-10-01
    “…<h4>Background</h4>Although the practice of communication is often called upon when intervening and involving communities affected by NTDs, the disciplinary framework of health communication research has been largely absent from NTD strategies. …”
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  5. 1445

    Interactive Multimodal Television Media Adaptive Visual Communication Based on Clustering Algorithm by Huayuan Yang, Xin Zhang

    Published 2020-01-01
    “…Experimental results show that the proposed method can efficiently and accurately recognize unknown visual communication. This article proposes that, in the interactive multimodal visual information transmission, human visual perception experience has changed, the diversity of visual information content expression makes the aesthetic subject more personalized and stylized.…”
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    Physiotherapy and Nutrition: Two Unavoidable Therapies in the Treatment of Chronic non-communicable Diseases by Ismaray Sacerio González, Lourdes Elena Duany Badell, Lenia Marín Medina

    Published 2023-06-01
    “…The role of the physiotherapist is decisive, to promote adherence to nutritional treatment of patients with non-communicable diseases.…”
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  9. 1449
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    Secure-Network-Coding-Based File Sharing via Device-to-Device Communication by Lei Wang, Qing Wang

    Published 2017-01-01
    “…In order to increase the efficiency and security of file sharing in the next-generation networks, this paper proposes a large scale file sharing scheme based on secure network coding via device-to-device (D2D) communication. In our scheme, when a user needs to share data with others in the same area, the source node and all the intermediate nodes need to perform secure network coding operation before forwarding the received data. …”
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  11. 1451
  12. 1452

    Time-varying channel estimation in reconfigurable intelligent surface assisted communication system by Kai SHAO, Ben LU, Guangyu WANG

    Published 2024-01-01
    “…Aiming at the key problems need to be solved, such as cascade channel sparse representation, time-varying channel parameter tracking and signal reconstruction, for time-varying cascade channels estimation of reconfigurable intelligent surface (RIS) assisted communication system, a Khatri-Rao and hierarchical Bayesian Kalman filter (KR-HBKF) algorithm was proposed.Firstly, the Khatri-Rao product and Kronecker product transformations were used to obtain the sparse representation of RIS cascaded channels based on the sparse characteristics of channels, thus the RIS cascaded channel estimation problem was transformed into a low-dimensional sparse signal recovery problem.Then, according to the state evolution model of RIS cascaded channel, the time correlation parameter was introduced into the prediction model of HBKF algorithm, and the improved HBKF was applied to solve the problem of time-varying channel parameter tracking and signal reconstruction for completing the time-varying cascaded channels estimation.The sparsity and time correlation of the channel were comprehensively considered in the KR-HBKF algorithm, thus better estimation accuracy could be obtained with small pilot overhead.Compared with the traditional compressed sensing algorithm, the simulation results show that the proposed algorithm has about 5 dB estimated performance improvement, and better robustness performance under different time-varying channel conditions.…”
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  16. 1456

    Airworthiness analysis of low earth orbit satellite communication technology for UAV application by Yaoyu HE, Chao ZHANG

    Published 2023-06-01
    “…With the rapid development of unmanned aerial vehicle (UAV) and low earth orbit (LEO) satellite technology, the integrated network consisted of the space, air, ground and sea has promoted the wide development of Internet of remote things (IoRT) on the UAV platform.Confronting the application demand of UAV with LEO satellite, the corresponding flight safety of UAV needs to be considered firstly, and the airworthiness of UAV has become the top priority of the technical application.The significance of the airworthiness of the UAV system was introduced and the technology of LEO satellite with UAV was summarized.Moreover, the related airworthiness programs of UAV equipped with LEO communications system were proposed.Meanwhile, based on the comprehensive analysis of UAV oriented LEO satellite technology, the means of compliance (MOC) on the airworthiness theory has been carried out.…”
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    THE NES WRITING AND COMMUNICATION CENTER: THE CASE FOR STUDENT-ORIENTED WRITING CENTERS IN RUSSIA by Laura Ashley Squires

    Published 2016-12-01
    “…The Writing and Communication Center (WCC) at the New Economic School (NES) turned five years old in 2016 and remains the oldest writing center in Russia. …”
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