Cooperative MAC protocol based on network coding and space-time coding by Qian-bin CHEN, Jian LIU, Yong FENG, Lun TANG

“…Aiming at the problems in wireless ad hoc networks,such as relays’ low efficiency caused by cooperation and difficult to meet the different QoS requirements,a co e MAC protocol was proposed based on the combination of network coding and space-time coding(NSTCMAC).Based on NSTCMAC protocol with the combination of Network coding and space-time coding techniques,a kind of cooperative MAC transmission mechanism that could distinguish the type of DATA packet was designed in order to meet the QoS requirements of different types of transm Further more,cooperative transmission mechanism and its performance were analyzed through Markov chain model.When transmitting the non-real-time(NR) packets,network coding was adopted to improve the efficiency of relay nodes; when transmitting the real-time(R) packets,randomized distributed space-time coding(R-DSTC)was used to enhance the reliability of transmission.Simulation results show that NSTCMAC protocol can meet different QoS requirements better,and solve the problem of relays’ low efficiency more effectively,when compared with legacy DCF、COOPMAC and CD-MAC protocol.…”
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Magnetic and Thermal Characterization of Fe2.9wt.%Si for Magnetic Shielding Applications by Michele Quercio, Luca Santoro, Emir Poskovic, Raffaella Sesana, Aldo Canova

“…The study compares these materials’ performance with conventional counterparts, particularly in the context of their application in magnetic shielding of a relay switch. The research integrates experimental findings from thermal imaging techniques to evaluate the efficiency of these materials under operational conditions, offering valuable insights into the future of additive manufacturing in high-performance magnetic shielding.…”
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Downlink and Uplink Cooperative Transmission for Primary Secrecy Based Cognitive Radio Sensor Networks by Dawei Wang, Pinyi Ren, Qinghe Du, Li Sun, Yichen Wang

“…Aiming at allocating more licensed spectrum to wireless sensor nodes (SNs) under the constraint of the information security requirement of the primary system, in this paper, we propose a cooperative relaying and jamming secure transmission (CRJS) scheme in which SNs will relay primary message and jam primary eavesdrop concurrently with SN's downlink and uplink information transmission in cognitive radio sensor networks (CRSNs). …”
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Automatic Recognition and Detection System Based on Machine Vision by Lu Wang, Lihong Cui

“…This paper combines machine vision with motion control theory and uses pulse coupled neural network (PCNN) edge detection and recognition algorithms to preliminarily design a set of machine vision automatic recognition and detection systems and carry out detection and recognition experiments on small parts such as relay covers. The experimental results show that the whole process of part size detection and recognition, including part feeding, image acquisition, size recognition, part screening, and reset of the experimental platform, can be completed within 5 s and can carry out high-precision dynamic recognition and detection when the part moves at a speed of 1 m/s. …”
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Food for thought: Family Entrepreneurship in four questions by Kathleen Randerson

“…The purpose of this essay is to relay the momentum to academics, practitioners, and society. …”
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Optimizing Cooperative Cognitive Radio Networks with Opportunistic Access by Ammar Zafar, Mohamed-Slim Alouini, Yunfei Chen, Redha M. Radaydeh

“…Both the cases of all-participate relaying and selective relaying are considered. The objective function is derived and the constraints are detailed for both scenarios. …”
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SDFMUCR: Software-defined and fuzzy-based multi-hop unequal cluster routing by Lu Sixu, Wu Muqing, Zhao Min

“…In these protocols, nodes closer to base station have the smaller cluster size than other sensor nodes. It will reduce the relay pressure of the node which is near to the base station. …”
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Distributed data storage and transmission for space Internet of things by Qinyu ZHANG, Shushi GU, Ye WANG, Jiayin XUE

“…Based on the concepts and related techniques of Internet of things (IoT),tracking the development tendency of the satellite IoT and LEO constellation communication system abroad,and the deployment of the integrated satellite-terrestrial information network in China,the concept of space Internet of things (Space IoT) with its framework and main characteristics was proposed.Space IoT has the different concept compared to the traditional IoT,not just using the relay satellite to implement remote machine-to-machine communication.Space IoT is a ubiquitous IoT system under the integrated satellite-terrestrial information network architecture,and an expansion of the terrestrial IoT in the global three-dimensional world,and a service and application platform of multiple information technologies.With the recently era of big data,the space IoT has to face some data storage and transmission problems,such as excessive system load,data loss,frequent link interruption,high energy consumption,etc.Establishing a space-oriented IoT integrated distributed storage and transmission system was to meet the requirements of security guarantee and cross-domain interconnection with massive information businesses.Development status of related technologies were illustrated.At last,the prospect and thought of the future research of space Internet of things were presented.…”
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Distributed IOS-SM transmission scheme with joint antenna and IOS unit selection for high-speed railway scenario by Qingfeng DING, Song WANG

“…A distributed intelligent omni-surface (IOS) -assisted spatial modulation (SM) transmission scheme was proposed to address the problem of transmission rate degradation caused by the high signal penetration loss in closed carriages in the high-speed railway scenarios.Firstly, SM technology was utilized to ensure that the indexed information section was not affected by penetration loss.Then, to reduce the high path loss and power loss of the long-range IOS windows, the distributed IOS was selected by traversal algorithm according to the principle of maximizing the received signal-to-noise ratio, and the best IOS window was activated to transmit the SM modulated information.Finally, to reduce the impact of the missing direct view path gain on the overall system performance, the antenna removal principle and the sequential selection method were used to dynamically and selectively activate the receiving antenna and IOS unit under the power consumption model.The simulation results show that the proposed scheme is more suitable for the high-speed railway wireless communication scenario than the conventional relay-forwarding and reconfigurable intelligence surface -SM (RIS-SM) schemes.And with the power loss model, the distributed IOS-SM scheme chosen by the combined antenna and IOS unit is still able to guarantee high performance transmission of the system.…”
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A Survey of Secure Communications for Satellite Internet Based on Cryptography and Physical Layer Security by Yu Zhang, Shuangrui Zhao, Ji He, Yuanyu Zhang, Yulong Shen, Xiaohong Jiang

“…The former includes classical encryption-based and quantum encryption-based secure communication, and the latter is further divided into precoding-based, cooperative jamming-based, relay selection-based, and physical-layer authentication-based secure communication depending on the applied techniques. …”
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Pech Piélat (Séniergues, Lot) : un relais routier antique en pays cadurque by Laurent Grimbert, Vivien Mathé, Marion Druez

“…A comparison of the archaeological data and the results of the tomography has enabled the identification and description of a small relay station along the Divona-Augustoritum route. …”
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Optimal linear quadratic control for wireless sensor and actuator networks with random delays and packet dropouts by Zhuwei Wang, Lihan Liu, Chao Fang, Xiaodong Wang, Pengbo Si, Hong Wu

“…Considering the event-driven relay nodes, the optimal solution is obtained, which is a function of the current plant state and all past control signals. …”
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Emergence of Prediction by Reinforcement Learning Using a Recurrent Neural Network by Kenta Goto, Katsunari Shibata

“…In a task where an agent gets a reward when it catches a moving object that can possibly become invisible, it was observed that the agent learned to detect the necessary factors of the object velocity before it disappeared, to relay the information among some hidden neurons, and finally to catch the object at an appropriate position and timing, considering the effects of bounces off a wall after the object became invisible.…”
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A Frequency-Tracking and Impedance-Matching Combined System for Robust Wireless Power Transfer by Yanting Luo, Yongmin Yang, Suiyu Chen, Xisen Wen

“…Previous adaptive impedance-matching (IM) technologies have drawbacks because adding IM networks, relay coils, or other compensating components in the receiver-side will significantly increase the receiver size. …”
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Generating Solar Sail Trajectories in the Earth-Moon System Using Augmented Finite-Difference Methods by Geoffrey G. Wawrzyniak, Kathleen C. Howell

“…Such a trajectory might be desirable for a single-spacecraft relay to support communications with an outpost at the lunar south pole. …”
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Outage Analysis of Train-to-Train Communication Model over Nakagami-m Channel in High-Speed Railway by Pengyu Liu, Xiaojuan Zhou, Zhangdui Zhong

“…Source train uses trains on other rail tracks as relays to transmit signals to destination train on the same track. …”
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3D WSN clustering routing algorithm based on IHBA optimized fuzzy C-means by Jing YANG, Biyang XU, Weizheng LI, Wei LI, Zhaoqiang ZHU, Tao QIN

“…Aiming at the problem that clustering routing algorithm in a three-dimensional (3D) scene has high energy consumption and short network lifetime, a clustering routing algorithm IFCRA for 3D wireless sensor networks based on improved honey badger algorithm optimized fuzzy C-means was proposed.The network clustering, cluster head election, and data transmission stages were optimized respectively.Firstly, the improved honey badger algorithm was used to optimize the fuzzy C-means algorithm, solving the problem of fuzzy C-means easily falling into local optima, and the topological structure was divided based on the distance and energy characteristics of nodes.Secondly, the optimal cluster head function was constructed by combining the energy and relative distance of nodes within the cluster to balance the cluster head load.Finally, an adaptive transmission mechanism was used to search for relay nodes, and the optimal transmission path function was constructed by combining node distance and energy.The improved honey badger algorithm was used to optimize the data transmission energy consumption.Simulation results show that IFCRA has reasonable clustering, balanced energy consumption, and long lifespan in a 3D heterogeneous scene.…”
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Energy-Balanced Density Control to Avoid Energy Hole for Wireless Sensor Networks by Jie Jia, Jian Chen, Xingwei Wang, Linliang Zhao

“…Density control is of great relevance for wireless sensor networks monitoring hazardous applications where sensors are deployed with high density. Due to the multihop relay communication and many-to-one traffic characters in wireless sensor networks, the nodes closer to the sink tend to die faster, causing a bottleneck for improving the network lifetime. …”
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Motorcycle Engine Start System Using Fingerprint and Voice Command by Wabdillah, Akbar Iskandar, Syahriandi

“…This engine start system is designed using Arduino Uno as the main part which is then assembled with devices such as the HC-05 Bluetooth module to connect the Android application with the microcontroller on the motorbike, the FP10MA fingerprint, relay and speaker which are installed on the motorbike's electrical parts. …”
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Cli-fi Young Adult et imaginaire urbain : (re)configurations génériques by Natacha Levet

“…Young Adult Cli‑Fi benefits from young readers appetite for science fiction and dystopia and the attention they give to environment, climate crisis and ecology. These novels often relay media cliché about some kind of fiction talking about present time or near future (Langlet, 2020). …”
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