Propagation Measurement on Earth-Sky Signal Effects for High Speed Train Satellite Channel in Tropical Region at Ku-Band by Abdulmajeed H. J. Al-Jumaily, A. Sali, J. S. Mandeep, Alyani Ismail

“…The underlying analytical tool is validated by measurements specific at tropical region, for dynamic model of mobile satellite links operating at higher than 10 GHz.…”
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A Novel Execution Mode Selection Scheme for Wireless Computing by Jiadi Chen, Wenbo Wang

“…Therefore, an offloading decision scheme is in demand for mobile devices to decide whether to offload a computation task to the server or to execute it in a local processor. …”
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Type Synthesis of Hybrid Robot Mechanism with 3T2R based on Single Opened Chain Unit by Sheng Weifeng, Chen Hai, Qin Youlei, Cao Yi

“…By analyzing the structures characteristics of the lower- mobility serial kinematic mechanism（SKM） and parallel kinematic mechanism（ PKM）,based on the linear independence theory of kinematic screws and taking of the lower- mobility SKM with single opened chain as unit,a systematic and effective type synthesis method is proposed for hybrid mechanism including the definition and symbol denotation method of both hybrid robots with a parallel mechanism and multi- parallel mechanisms. …”
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Automatic extraction and geographization of urban traffic event based on natural Chinese text data by Chenyu Hu, Hangbin Wu, Chaoxu Wei, Qianqian Chen, Han Yue, Wei Huang, Chun Liu, Ting Fu, Junhua Wang

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Proof of Concept of an IoT-Based Public Vehicle Tracking System, Using LoRa (Long Range) and Intelligent Transportation System (ITS) Services by Ricardo Salazar-Cabrera, Álvaro Pachón de la Cruz, Juan Manuel Madrid Molina

“…Systems trying to solve mobility issues in cities, such as high levels of accidents and traffic congestion, have been developed worldwide. …”
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Study of Electrical Transport Properties of Thin Films Used as HTL and as Active Layer in Organic Solar Cells, through Impedance Spectroscopy Measurements by Camilo A. Otalora, Andres F. Loaiza, Gerardo Gordillo

“…The study allowed determining the influence of the type of solvent used for the preparation of the active layer as well as the speed at which the solvents are removed on the carriers mobility. The effect of exposing the layer of P3HT to the air on its mobility was also studied. …”
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A data-driven semi-parametric model of SARS-CoV-2 transmission in the United States. by John M Drake, Andreas Handel, Éric Marty, Eamon B O'Dea, Tierney O'Sullivan, Giovanni Righi, Andrew T Tredennick

“…The model accounts for the effects on transmission of human mobility using anonymized mobility data collected from cellular devices, and of difficult to quantify environmental and behavioral factors using a latent process. …”
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Investigation of a New Handover Approach in LTE and WiMAX by Mohammad Nour Hindia, Ahmed Wasif Reza, Kamarul Ariffin Noordin

“…Nowadays, one of the most important challenges in heterogeneous networks is the connection consistency between the mobile station and the base stations. Furthermore, along the roaming process between the mobile station and the base station, the system performance degrades significantly due to the interferences from neighboring base stations, handovers to inaccurate base station and inappropriate technology selection. …”
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A Novel Two-Terminal Reliability Analysis for MANET by Xibin Zhao, Zhiyang You, Hai Wan

“…Mobile ad hoc network (MANET) is a dynamic wireless communication network. …”
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Research on Key Strategies of 3G/4G Convergence Network by Fei Zhou

“…Techniques of both WCDMA and LTE network were analyzed in detail, and LTE construction thoughts of China Unicom were elaborated from the viewpoints of brand convergence, network convergence and mobile terminal convergence, which aimed to promote combination of 3G and 4G to fulfill the best mobile broadband network.…”
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Research status and development trend of NB-IoT enhancement technology by Furong XU, Weiwen WENG, Chao ZHANG, Tingting BIAN, Xinli MA, Xiangdong GAO, Xin LI, Lei CAO

“…NB-IoT,which is the key technology of the Internet of things,has received widespread attention from global operators.Firstly,the commercial technologies of NB-IoT was outlined,then the research status of NB-IoT enhancement technology was introduced in detail from the aspects of mobile IoT enhancement technology,positioning enhancement technology,mobility enhancement technology and intelligent network optimization technology,and finally,future evolution of NB-IoT technology was introduced.…”
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Singularity Analysis For 3-PPR Parallel Spherical Mechanism based on Screw Theory by Zhao Ruijie, Song Shengtao, Li Ruiqin, Li Dahai, Zhao Jianwen

“…A new type of 3-PPR spherical parallel mechanism is proposed.Due to the mobile pair special trajectory in each branch chain,the mobile pair can be equivalent conversion for revolute pair.Based on screw theory,each branched chain motion screw system is given.The mobility of this mechanism is analyzed firstly with the amendment G-K formula,The numbers of degrees of freedom is obtained.Secondly,by using the solution method of inverse spiral system and matrix theory knowledge,under the premise of Jacobian matrix of the 3-PPR spherical parallel mechanism is solved,the rank of matrix is analyzed,the singular configuration conditions and the type of singular configuration of the mechanism are obtained.In the end,according to the forward kinematics solution and interference condition,the Matlab software is used to draw up the stable working space.Research shows that a 3-PPR parallel spherical mechanism singularity is less,and easy to avoid,has good application prospect.…”
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Modeling and Performance Analyses of Hybrid Cellular and Broadcasting Networks by Peter Unger, Thomas Kürner

“…Mobile TV is one of the most demanded candidates. …”
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Secure and efficient batch authentication scheme based on dynamic revocation mechanism in space information network by Yinghui ZHANG, Lingyun HU, Yixin LI, Jianting NING, Dong ZHENG

“…A secure and efficient batch authentication scheme based on dynamic revocation mechanism was proposed for the problem of cross-domain authentication of a large number of mobile users in space information networks.Early key negotiation was achieved by predicting the satellite trajectory and updating the session key in real time.Algorithms were designed for a single as well as a large number of mobile terminals to perform signing and verification, which effectively reduce the computational burden of satellites.Cuckoo filters were adopted by the new scheme to achieve dynamic revocation and malicious access control of mobile terminals.Finally, under the Diffie-Hellman assumption, the proposed scheme was proved to be resistant to replay and man-in-the-middle attacks based on a random oracle model and automated validation of internet security protocols and applications.Security goals such as traceability and revocability were achieved by the scheme, thus improving the efficiency of transmission and computation by more than 80% and 20%, respectively, compared with the existing optimal scheme.…”
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Analysis of UAV wireless network coverage and handover performance by Bonan YIN, Mugen PENG, Chenxi LIU

“…For the characteristics of unmanned aerial vehicle (UAV),such as high mobility,adjustable height,and high probability of line-of-sight channels,which introduced multiple challenges to the design and deployment of current and future wireless network,and the networking performance of UAV was the focus and difficult issues in the industry,the network coverage and handoff performance of heterogeneous UAV wireless network was analyzed,which provided insights into UAV wireless networking.Specifically,considering the outdated channel state information introduced by the UAV’s mobility,analytical expressions of handover probability,handover error probability,and coverage probability for heterogeneous UAV wireless network were derived by utilizing the tools from stochastic geometry.In addition,the impacts of the UAV’s mobility,height,as well as the density of terrestrial base stations on the aforementioned performance metrics were investigated.It shows that the outdated channel state information caused handover error,which increases first and then decreases with the increase of UAV’s moving speed and density of base stations.Meanwhile,the impact of UAV’s flight height on coverage probability is more significant than that of moving speed.…”
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Type Synthesis of 3R2T Hybrid Robot Mechanisms based on Serial-opened-chain Unit by Chen Hai, Qin Youlei, Cao Yi

“…By analyzing the characteristics of structures for the lower- mobility serial robot mechanism and parallel robot mechanism,a systematic and effective type synthesis including the definition and symbol denotation method of both hybrid robot with a parallel mechanism and multi- parallel mechanisms method is proposed for hybrid robot mechanisms based on the principle of movement spiral linear independence and units of the lower- mobility serial mechanism with single- opened- chain limb. …”
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Hop count limitation analysis in wireless multi-hop networks by Liao Wenxing, Wu Muqing, Zhao Min, Li Peizhe, Li Tianze

“…A mass of models and algorithms about network connectivity, path reliability, and node mobility have been proposed to improve network performance. …”
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Campos de dunas em Jericoacoara: intervenções humanas como possível indicador de mudança na dinâmica morfológica by Antonio Jeovah Meireles, Adryane Gorayeb, Narcélio de Sá Pereira Filho

“…The morphology of the Jericoacoara National Park in the northeastern Brazilian state of Ceará consists of a headland covered by a mobile dune field consisting of large mobile barchans dune fields that migrate from east to west. …”
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RIS-assisted multi-user beam tracking system and hardware experiment by DING Chenlong, XU Wenjun, ZHANG Hongtao

“…A prototype of a RIS-assisted multi-user beam tracking system was developed, enabling fast beam alignment during multi-user mobility. Experimental results show that millisecond-level beam switching can achieve real-time information transmission for mobile multi-users.…”
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A computation offloading scheme for energy consumption optimization in Internet of vehicles by Wenxuan GAO, Xinjie YANG

“…In Internet of vehicles (IoV), vehicle-oriented applications are generally computation-intensive and latency-sensitive.Introducing idle computing resources from mobile vehicles as a supplement to network computing power can effectively alleviate the load pressure on edge servers.The problem of task allocation for edge computation offloading in the context of IoV environment were researched.By fully leveraging the combined computing resources of roadside units (RSU), user vehicles, and mobile vehicles within the RSU service range, a computation offloading strategy based on the sparrow search algorithm was proposed and referred to as sparrow search based computation offloading scheme (S²COS), aiming to optimize the overall system energy consumption.In addition, this strategy fully taked into account practical network issues such as service time constraints caused by vehicle mobility and the potential occurrence of computation node failures.The simulation results demonstrate that S²COS can meet the latency requirements for computation-intensive and latency-sensitive tasks, while significantly reducing system energy consumption.…”
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