Research on Random Access Technology of Inter-Frame Interference Cancellation for 6G Satellite Internet of Things by Yu XU, Qing GUO

“…In 6G, one of the important application scenarios is ultra-massive machinetype communications, which is mainly oriented to the application scenarios of concurrent access of massive terminals such as the satellite Internet of Things.How to design an access mechanism that can meet the concurrent access service requirements of large-scale users in machine communication scenarios for the future 6G satellite communication network is an important problem to be solved.A random access protocol based on intra-frame interference cancellation was proposed.In this protocol, each access user who needs to transmit data sends multiple packet copies in one frame, and the receiver can successfully receive packets from multiple users in confl icting time slots by using interference cancellation algorithms in the frame.Compared with the traditional random access mechanism, this mechanism can greatly improve the throughput performance in the scenario of multi-user concurrent access.…”
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The Role of New Orleans Parish Prison in Joyce Carol Oates’s “Aiding and Abetting” by Tanya TROMBLE

“…This article explores the role played in the story by the New Orleans Parish Prison and examines the implications of the use of this ultra-marginal space in the fiction of a traditionally northern writer.…”
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Primary Omental Torsion in an Old Woman: Imaging Techniques Can Prevent Unnecessary Surgical Interventions by Mohhamad-Hadi Saeed Modaghegh, Reza Jafarzadeh

“…Since the first report on primary torsion by Eitel in 1899, a few hundred more have been reported and some collective reviews published to date. Recently, ultra sonography and computed tomography have proved to provide sufficiently typical, consistent, and well-recognizable features to avoid unnecessary surgery. …”
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Reconfigurable intelligent surface assisted resource optimization method for heterogeneous network by Xianhao SHEN, Ziling ZENG, Shaohua NIU

“…For reconfigurable intelligent surface (RIS)-assisted heterogeneous network slicing, a resource optimization method with joint resource allocation and phase shift optimization was proposed.A joint optimization problem with different objectives was constructed for different services in heterogeneous networks.For enhanced mobile broadband (eMBB) services, the resource block allocation, power allocation and RIS phase shift matrix were jointly optimized based on the alternating optimization algorithm to maximize the total traversal capacity of eMBB users.For ultra-reliable low-latency communication (URLLC) services, a pre-configured RIS-based heuristic URLLC allocation algorithm was proposed with the objectives of maximizing the URLLC packet reception rate and minimizing the amount of eMBB rate loss.Simulation results demonstrate that the proposed algorithm achieves about 99.99% URLLC packet reception rate using only 80 RISs compared to 95.95% URLLC packet reception rate when no RISs are deployed, while the total eMBB rate is increased by 86.24%.…”
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Wirelessly Pattern Reconfigurable Yagi Antenna Based on Radio Frequency Identification by Chuankui Shen, Zhengxing Wang, Liekun Yang, Fengcheng Mei, Terry Tao Ye

“…The entire system operates with an ultra-low power consumption of 12 μW.…”
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The Development of a New Kinetic Spectrophotometric Method for the Determination of Vanadium(V) Based on its Catalytic Effect on the Oxidation of Malachite Green Oxalate by Bromate... by M. Keyvanfard, N. Abedi

“…A new, simple, sensitive and selective kinetic spectrophotometric method was developed for the determination of ultra trace amounts of vanadium(V). The method is based on the catalytic effect of vanadium(V) on the oxidation of malachite green oxalate (MG) by bromate in acidic and micellar medium. …”
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Size effect-based improved antioxidant activity of selenium nanoparticles regulating Anti-PI3K-mTOR and Ras-MEK pathways for treating spinal cord injury to avoid hormone shock-indu... by Peixin Liu, Xiaodong Liu, Zihao Wu, Kui Shen, Zhaofeng Li, Xiaowei Li, Qifeng Wu, Leung Chan, Zhong Zhang, Yutong Wu, Liwen Liu, Tianfeng Chen, Yi Qin

“…This study proposed a synthesis method for ultra-small-diameter lentinan Se nanoparticles (LNT-UsSeNPs) with significantly superior reactive oxygen species (ROS) scavenging capabilities compared to conventional lentinan Se nanoparticles (LNT-SeNPs). …”
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A New Transformation Method of the T₂ Spectrum Based on Ordered Clustering—A Case Study on the Pore-Throat Utilization Rule of Supercritical CO₂ Flooding in L... by Yanchun Su, Chunhua Zhao, Xianjie Li, Xiujun Wang, Jian Zhang, Bo Huang, Xiaofeng Tian, Mingxi Liu, Kaoping Song

“…For the three kinds of cores with ordinary-low permeability (K > 1 mD), ultra-low permeability (0.1 mD < K < 1 mD), and super-low permeability (K < 0.1 mD), the pore-throat distribution curves of the cores were obtained by using the improved T₂ conversion method. …”
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Advanced VO2-Graphene based compact THz absorber for EM shielding and biosensing applications by Patri Upender, P. Sandeep, S.Prasanna Bharathi, Krishna Kumba, Amarjit Kumar

“…This paper presents a compact, metal-free THz absorber utilizing VO2 and graphene, offering ultra-wideband absorption (1.0702–13.3 THz) in the conducting state of VO2 and narrow absorption at 6.81 THz in the insulating state. …”
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Predictive channel scheduling algorithm between macro base station and micro base station group by Yinghai XIE, Ruohe YAO, Bin WU

“…A novel predictive channel scheduling algorithm was proposed for non-real-time traffic transmission between macro-base stations and micro-base stations in 5G ultra-cellular networks.First,based on the stochastic stationary process characteristics of wireless channels between stationary communication agents,a discrete channel state probability space was established for the scheduling process from the perspective of classical probability theory,and the event domain was segmented.Then,the efficient scheduling of multi-user,multi-non-real-time services was realized by probability numerical calculation of each event domain.The theoretical analysis and simulation results show that the algorithm has low computational complexity.Compared with other classical scheduling algorithms,the new algorithm can optimize traffic transmission in a longer time dimension,approximate the maximum signal-to-noise ratio algorithm in throughput performance,and increase system throughput by about 14% under heavy load.At the same time,the new algorithm is accurate.Quantitative computation achieves a self-adaption match between the expected traffic rate and the actual scheduling rate.…”
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Efficient implementation for BFV fully homomorphic encryption algorithm based on Zynq platform by YANG Yatao, CAO Jingpei, CHEN Liangyu, WANG Wei

“…Test results on the Zynq UltraScale+MPSoC ZCU102 platform show that the system performs a homomorphic addition in just 0.024 ms and a homomorphic multiplication in 5.779 ms at a 200 MHz clock frequency, which includes 0.874 ms for ciphertext transmission. …”
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On-Demand Beam Scheduling Technology of Low-Orbit High-Throughput Satellite by Shuai HAN, Yihang WU, Jixi LI, Zuting CHEN, Siyue SUN, Guang LIANG

“…Low-orbit high-throughput satellite internet can satisfy the increasing speed and connection density requirements of end users and provide users with all-weather low-latency ultra-broadband communication services.At the same time, how to adapt to the fl exible and unevenly distributed terrestrial service requirements in low-orbit downlink scenarios and improve system throughput is an urgent problem to be solved.Based on the modeling of the beamforming architecture of the low-orbit highthroughput satellite downlink system and the satellite-to-earth fading of the low-orbit satellite and the inter-beam interference of the high-throughput satellite, the low-orbit high-throughput satellite downlink channel model was established.Based on the research of the high-throughput satellite on-demand beam scheduling scheme, the beam scheduling optimization problem model was established to ensured the utilization of resources, and the on-demand beam scheduling technology for high-throughput satellite internet was proposed, the method of using a small amount of beams to cover multiple cells by using on-demand time division multiplexing improved the utilization rate of resources, effectively suppressed the interference between beams, and improved the throughput of the system.…”
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Design of UWB Monopole Antenna with Dual Notched Bands Using One Modified Electromagnetic-Bandgap Structure by Hao Liu, Ziqiang Xu

“…A modified electromagnetic-bandgap (M-EBG) structure and its application to planar monopole ultra-wideband (UWB) antenna are presented. The proposed M-EBG which comprises two strip patch and an edge-located via can perform dual notched bands. …”
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High-Performance Digital Devices Design by the ASMD-FSMD Technique for Implementation in FPGA by Valery Salauyou, Adam Klimowicz, Tomasz Grzes

“…The experiments were conducted using the QuartusPrime tool and Cyclone 10 LP devices, as well as Vivado tools and the Kintex UltraScale family device. The bit size of multiplicands varied from 4 to 128. …”
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Research on optimization of indoor positioning batch ranging system based on DS-TWR algorithm by Hongwei SUN, Xuehong CAO, Liangbao JIAO, Lin MENG, Ziheng LIU, Feng YUAN

“…Aiming at the current problems of the ultra wide band (UWB) indoor positioning system based on the double sided two-way ranging (DS-TWR) algorithm, there are more communication times and a higher conflict rate in a multi-tag environment, an improved algorithm was proposed.The Hash algorithm to hash and distribute the communication content between the tag and the anchor was used, so that the anchor could reply to multiple tags in a regular and unified manner during each ranging process, which greatly reduced the number of times the anchor sends RES (responds) data.Experimental results show that the improved algorithms’ communication times between a tag and the anchor were reduced by 15% compared with the traditional DS-TWR algorithm, which increases the time proportion of the anchor receiving state in ranging, thereby reducing the anchor receiving RNG (range) data.The collision rate of packets, the success rate of ranging has increased by 43.6%.Due to the reduction in the number of communications required in each positioning cycle and the reduction in the collision rate between data packets, a smaller channel capacity would be required, thereby increasing the label capacity of the positioning system, which has strong engineering significance.…”
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Effect of cast part size on the microstructure and mechanical properties of a bainitic High-Carbon and High-Silicon Cast Steel by N. E. Tenaglia, D. O. Fernandino, A. D. Basso

“…The presence of very fine microstructures results in ultra-high strength with low ductility cast steel.…”
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Fatigue Performance of Steel–UHPC Composite Bridge Deck System with Large Longitudinal Rib by Yi Zhou, Chuan Wei, Guoxi Liang, Dequan Zhou

“…An effective method for improving the fatigue life of OSDs is the introduction of an ultra high performance concrete (UHPC) layer to enhance OSD’s stiffness. …”
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Artificial intelligence techniques for stability analysis in modern power systems by Jiashu Fang, Chongru Liu

“…As smart grids evolve with increased interconnection, renewable energy integration, and electrification, the large-scale deployment of ultra-high voltage AC/DC networks introduces various operational modes and potential fault points, posing significant challenges to maintaining stability. …”
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Structure Identification and Risk Assurance of Unknown Impurities in Pramipexole Oral Drug Formulation by Raymond R. Tjandrawinata, Antonius H. Cahyana, Ajeng O. Nugroho, Indra K. Adi, Joseph S. R. Talpaneni

“…These impurities were identified and characterized using ultra-performance liquid chromatography coupled with high-resolution mass spectroscopy (UPLC-HRMS). …”
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Muscle Biopsy Sample Preparation and Proteomics Analysis Based on UHPLC-MS/MS by Jiawei Du, Jinghua Hou, Hezhang Yun, Yafeng Song

“…This protocol details the preparation of muscle samples for proteomics analysis using ultra-high-performance liquid chromatography (UHPLC). …”
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