Results 41 to 50 of about 2,280 (244)
Delay-Sensitive NOMA-HARQ for Short Packet Communications
Entropy, 2021 This paper investigates the two-user uplink non-orthogonal multiple access (NOMA) paired with the hybrid automatic repeat request (HARQ) in the finite blocklength regime, where the target latency of each user is the priority. To limit the packet delivery
Faisal Nadeem +3 more
doaj +1 more source
Influence of Geometric Design on Mechanical Performance of Auxetic Metastructure
Advanced Engineering Materials, EarlyView.Strategic geometric reinforcement transforms auxetic performance. This study evaluates 3D‐printed arrowhead metastructures, revealing that a modified design with local ring reinforcement suppresses premature failure to achieve superior energy absorption and structural efficiency.
Muhammad Gulzari +3 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.This study applies machine learning regression to predict chromium layer thickness in decorative trivalent chromium electroplating, using 441 experiments from laboratory‐scale (1L) and pilot‐scale (14L) setups. Tree‐based models, particularly CatBoost, outperformed linear regression by capturing nonlinear parameter interactions (R2$R^2$ up to 0.77 ...
Christoph Baumer +4 more
wiley +1 more source
Performance of Cognitive Radio Sensor Networks Using Hybrid Automatic Repeat ReQuest: Stop-and-Wait [PDF]
Mobile Networks and Applications, 2018 The enormous developments in the field of wireless communication technologies have made the unlicensed spectrum bands crowded, resulting uncontrolled interference to the traditional wireless network applications. On the other hand, licensed spectrum bands are almost completely allocated to the licensed users also known as Primary users (PUs).
Fazlullah Khan +4 more
openaire +2 more sources
Active Corrosion Protection of Sintered AA7075 Aluminum Alloy via Mn Powder Addition
Advanced Engineering Materials, EarlyView.AA7075 containing Mn‐rich particles is fabricated via spark plasma sintering using AA7075 and Mn powders. Corrosion resistance is evaluated through dip‐and‐dry tests using 0.1 M NaCl (pH 6.0), and mass loss decreases with increasing Mn addition. Mn‐rich particles function as a source of Mn ions, and formation of Mn‐accumulation films on Cu‐containing ...
Ko Ebina, Masashi Nishimoto, Izumi Muto
wiley +1 more source
Comparison of error control schemes in wireless sensor networks
Tongxin xuebao, 2008 Energy efficiency analyses of automatic repeat request （ARQ） and forward error correction （FEC） techniques were presented. Chase combining hybrid ARQ （HARQ） was proposed to achieve adaptive error control in wireless sensor networks.
TIAN Zhen +2 more
doaj +2 more sources
A Network Coding Based Hybrid ARQ Protocol for Underwater Acoustic Sensor Networks
Sensors, 2016 Underwater Acoustic Sensor Networks (UASNs) have attracted increasing interest in recent years due to their extensive commercial and military applications. However, the harsh underwater channel causes many challenges for the design of reliable underwater
Hao Wang +3 more
doaj +1 more source
Additive Manufacturing of Alumina‐Reinforced Elastomers
Advanced Engineering Materials, EarlyView.Vat‐photopolymerized elastomers reinforced with platelet‐shaped alumina exhibited preferential orientation, reduced porosity, and significantly enhanced mechanical performance. A 3 wt% platelet loading increased tensile strength from 12.4 to 45.7 MPa, highlighting the critical role of filler morphology in elastomeric VPP composites.
Majid Barzegar Keyvani +6 more
wiley +1 more source
Performance Analysis of Multihop CC-HARQ over Lognormal Shadowed Nakagami-m Fading Channels
ITM Web of Conferences, 2017 The performance of truncated Chase Combining based Hybrid Automatic Repeat reQuest (CC-HARQ) in multihop relay network is analysed. Different from prior works, composite lognormal shadowed Nakagami fading channels are considered.
Han Jun-Mei, Xi Yong, Wei Ji-Bo
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An Efficient Rateless Scheme Based on the Extendibility of Systematic Polar Codes
IEEE Access, 2017 In this paper, a new rateless scheme based on the extendibility of systematic polar codes is proposed, which is applicable for the scenario without channel state information (CSI).
Bowen Feng, Qinyu Zhang, Jian Jiao
doaj +1 more source