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Deep Learning Approach for Hand Gesture Recognition:Applications in Deaf Communication and Healthcare

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Computers, Materials & Continua 2024年第1期78卷 127-144页

作者： khursheed Aurangzeb khalid Javeed Musaed Alhussein Imad rida Syed Irtaza Haider Anubha parashar Department of Computer Engineering College of Computer and Information SciencesKing Saud UniversityP.O.Box 51178Riyadh11543Kingdom of Saudi Arabia Department of Computer Engineering College of Computing and InformaticsUniversity of SharjahSharjah27272United Arab Emirates Laboratory Biomechanics and Bioengineering University of Technology of CompiegneCompiegne60200France Department of Computer Science and Engineering Manipal University JaipurJaipur303007India

Hand gestures have been used as a significant mode of communication since the advent of human *** facilitating human-computer interaction(HCI),hand gesture recognition(HGRoc)technology is crucial for seamless and error-free *** technology is pivotal in healthcare and communication for the deaf *** significant advancements in computer vision-based gesture recognition for language understanding,two considerable challenges persist in this field:(a)limited and common gestures are considered,(b)processing multiple channels of information across a network takes huge computational time during discriminative feature ***,a novel hand vision-based convolutional neural network(CNN)model named(HVCNNM)offers several benefits,notably enhanced accuracy,robustness to variations,real-time performance,reduced channels,and ***,these models can be optimized for real-time performance,learn from large amounts of data,and are scalable to handle complex recognition tasks for efficient human-computer *** proposed model was evaluated on two challenging datasets,namely the Massey University Dataset(MUD)and the American Sign Language(ASL)Alphabet Dataset(ASLAD).On the MUD and ASLAD datasets,HVCNNM achieved a score of 99.23% and 99.00%,*** results demonstrate the effectiveness of CNN as a promising HGRoc *** findings suggest that the proposed model have potential roles in applications such as sign language recognition,human-computer interaction,and robotics.

关键词： Computer vision deep learning gait recognition sign language recognition machine learning

Facile preparation of a SiC@SiO_(2)nanowire-toughened ZrB_(2)-SiC/SiC bilayer coating with good interfacial bonding,high toughness,and excellent cyclic ablation resistance on C/CA composites

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Journal of Advanced Ceramics 2024年第4期13卷 486-495页

作者： Meng Yan Chenglong Hu Jian Li Shengyang pang Bohui Sun rida Zhao Bin Liang Rui Luo Sufang Tang Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China

preparing antioxidant coatings to address the inherent oxidation sensitivity of carbon fiber-reinforced carbon aerogel(C/CA)composites is a feasible way to promote their application in oxidizing environments as thermal insulation ***,preparing the coatings with excellent oxidation and ablation resistance while avoiding evident damage to the C/CA substrate still remains a ***,a SiC@SiO_(2)nanowire-toughened ZrB2–SiC/SiC bilayer coating with a large thickness of 500μm was prepared on C/CA using a one-step low-temperature reaction sintering method,which simultaneously formed a sintered outer layer with even-distributed nanowires and a siliconized gradient inner *** courtesy of the synergic thermal response of the layers and the crack deflection induced by the nanowires,the resulting coating has moderate residual compressive stress of 0.08–1.22 Gpa in the interface,high interfacial bonding strength of 6.02 Mpa,and good fracture toughness of 4.36 Mpa·m^(1/2).Benefited from the optimum components and improved structure,the coating shows excellent cyclic ablation resistance with linear ablation rates of 0.1μm/s at 1650℃for 1500 s(300 s×5 cycles)and 0.4μm/s at 1850℃for 900 s(300 s×3 cycles).The one-step preparation strategy contributes to little damage to the substrate,thus showing the well-preserved mechanical and thermal insulation properties.

关键词： coating carbon fiber reinforced carbon aerogel(C/CA)composites toughness interface residual stress

Intra-articular interventions in osteoarthritis:Navigating the landscape of hyaluronic acid,mesenchymal stem cells,and plateletrich plasma

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World Journal of Orthopedics 2024年第8期15卷 704-712页

作者： Somar Soufan Joenne Al khoury Zahi Hamdan Mohamad Ali rida Department of Medicine University of BalamandBeirut 00000Lebanon Department of Internal Medicine Clemenceau Medical CenterBeirut 12345Lebanon

Osteoarthritis(OA)poses a substantial burden on patients,leading to pain,functional decline,and reduced quality of *** conventional treatments focus on symptom management,disease-modifying interventions are yet to be *** review explores the efficacy of intra-articular interventions,particularly hyaluronic acid(HA),mesenchymal stem cells(MSCs),and platelet-rich plasma(pRp),in the context of OA *** injections,with diverse formulations like Hylan G-F20,sodium hyaluronate,and hyaluronan,present varying outcomes,necessitating a nuanced understanding of their effectiveness and *** therapy,derived from adipose tissue,umbilical cord,or bone marrow,shows promising results in clinical improvement,with adipose-derived MSCs demonstrating efficacy in maintaining benefits over 6 ***,bone-marrow-derived MSCs show limited effectiveness,highlighting the need for sourcespecific *** has emerged as a superior option for long-term pain reduction and quality of life improvement,with leukocyte-poor formulations and a critical platelet count of 10 billion demonstrating optimal *** comprehensive analysis underscores the potential of intra-articular interventions in OA management,emphasizing the need for personalized and evidence-based approaches to enhance treatment efficacy and patient outcomes.

关键词： Osteoarthritis,Viscosupplementation platelets Hyaluronic acid Stem cell

多孔碳陶瓷化改进反应熔渗法制备陶瓷基复合材料研究进展

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无机材料学报 2024年第6期39卷 623-633页

作者：赵日达汤素芳中国科学院金属研究所前沿材料研究部沈阳110016

连续纤维增强陶瓷基复合材料具有高强韧、耐氧化的特性,现已成为航空航天领域重要的高温结构候选材料。反应熔渗法可实现陶瓷基复合材料的大规模、短周期和低成本制备,是目前最具有商业化前景的技术之一。然而,传统反应熔渗法制得陶瓷... 详细信息

连续纤维增强陶瓷基复合材料具有高强韧、耐氧化的特性,现已成为航空航天领域重要的高温结构候选材料。反应熔渗法可实现陶瓷基复合材料的大规模、短周期和低成本制备,是目前最具有商业化前景的技术之一。然而,传统反应熔渗法制得陶瓷基复合材料存在着基体碳残留、纤维刻蚀等问题,导致材料力学与氧化-烧蚀性能不佳。为突破传统碳基体陶瓷化程度低的局限性,相关研究人员采用碳基体孔结构构筑方法,通过多孔碳基体取代传统熔渗预制体中致密碳基体,以促进碳基体的陶瓷化转变及反应熔体的消耗,进而实现陶瓷基复合材料的性能优化。本综述介绍了采用多孔碳陶瓷化策略制备SiC陶瓷、SiC/SiC复合材料、C/SiC复合材料及超高温陶瓷基复合材料的相关研究进展,并且通过与传统反应熔渗法对比,验证了多孔碳陶瓷化策略的优势,同时总结了相关多孔碳基体制备方法的发展演变过程,最后针对先进陶瓷基复合材料的基础理论与工艺技术需求,对多孔碳陶瓷化改进反应熔渗法的未来发展方向进行了展望。

关键词：陶瓷基复合材料反应熔渗法多孔碳陶瓷化综述

Enhancing cotton resilience to challenging climates through genetic modifications

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Journal of Cotton Research 2024年第2期7卷 196-206页

作者： AHMED Ali Ijaz kHAN Azeem Iqbal NEGM Mohamed A.M. IQBAL rida AZHAR Muhammad Tehseen kHAN Sultan Habibullah RANA Iqrar Ahmad Department of plant Breeding and Genetics University of AgricultureFaisalabadFaisalabad 38000Pakistan Cotton Research Institute-Giza GizaEgypt Centre for Advanced Studies in Agriculture and Food Security University of AgricultureFaisalabadFaisalabad 38000Pakistan Centre of Agricultural Biochemistry and Biotechnology University of AgricultureFaisalabadFaisalabad 38000Pakistan School of Agriculture Sciences Zhengzhou UniversityZhengzhou 450000China

Cotton is one of the most important fiber crops that plays a vital role in the textile *** production has been unstable over the years due to climate change induced biotic stresses such as insects,diseases,and weeds,as well as abiotic stresses including drought,salinity,heat,and *** breeding methods have been used to breed climate resilient cotton,but it requires a considerable amount of time to enhance crop tolerance to insect pests and changing climatic conditions.A promising strategy for improving tolerance against these stresses is genetic *** review article discusses the role of genetic engineering in cotton *** essential concepts and techniques include genome editing via clustered regularly interspaced short palindromic repeats(CRISpR)/CRISpR-associated protein 9(CRISpR-Cas9),overexpression of target genes,downregulation using RNA interference(RNAi),and virus-induced gene silencing(VIGS).Notably,the Agrobacterium-mediated transformation has made significant contributions to using these techniques for obtaining stable transgenic plants.

关键词： Cotton Genome editing Drought Salinity Heat

Rebirth of CuInS_(2) as hole transport material for perovskite solar cells

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SmartMat 2023年第6期4卷 6-10页

作者： rida Ahmed Institute of Solid State physics Hefei Institutes of Physical SciencesChinese Academy of SciencesHefeiAnhuiChina

Copper indium sulfide,CuInS_(2)(CIS),has entered the field of photovoltaic cells for about three decades but somehow,they have not met their theoretically predicted efficiency as an absorber ***,it is being employed as a hole transport layer in conjunction with organic–inorganic perovskite solar cells,which offer improved environmental stability at a reduced production *** commentary piece aims to draw researchers'attention to the use of CIS as hole transport layers in organic-inorganic perovskite solar cells,with the expectation that further study and efficiency improvements will propel perovskite solar cells into the commercialization race.

关键词： material perovskite inorganic

Capillary infiltration of liquid silicon in carbon nanotubes:A molecular dynamics simulation

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Journal of Materials Science & Technology 2023年第13期144卷 219-223页

作者： kangyu Zhang rida Zhao Yongqiang Yang Lichang Yin Sufang Tang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Department of physics and Electronic Information Huaibei Normal UniversityAnhuiHuaibei 235000China

In this work,by simplifying the nanopores of porous C/C preform with single-walled carbon nanotubes(SWCNT)or double-walled carbon nanotubes(DWCNTs),the infiltration of liquid Si in the SWCNTs and DWCNTs was studied by molecular dynamics(MD)*** a result,a quantitative relationship between tube diameter and liquid Si infiltration rate was established,which has been successfully ap-plied to reproduce the available experiment *** obtained relationship indicates that the capillary infiltration of liquid Si at the nanoscale still conforms to the classic Lucas-Washburn law,however,the liquid Si infiltration quickly stops in small tubes with a diameter of less than 3 nm due to an obvious contraction of the tube *** work may provide theoretical guidance for pore structure optimization of porous C/C preform to fabricate high-density C/SiC composites.

关键词： Silicon carbide Molecular dynamics Capillary infiltration,Liquid silicon,Carbon nanotube

Deposition kinetics and mechanism of pyrocarbon for electromagnetic-coupling chemical vapor infiltration process

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Journal of Materials Science & Technology 2022年第6期101卷 118-127页

作者： Chenglong Hu rida Zhao Sajjad Ali Yuanhong Wang Shengyang pang Jian Li Sufang Tang Institute of Metal Research Chinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China Department of physics Southern University of Science and TechnologyShenzhen 518055China The 31st Research Institute of China Aerospace Science and Industry Corp Beijing 100074China

Although the electromagnetic-coupling chemical vapor infiltration(E-CVI)has been proven of a highefficiency technique for producing carbon fiber reinforced pyrocarbon(py C)matrix(C/C)composites,a deep understanding of the deposition kinetics and mechanism of py C matrix is still *** this work,a deposition model with uniform electric field but gradient magnetic field was set up by using unidirectional carbon fiber bundles as the substrates to investigate the deposition kinetics and ***,the polarizability,and the chemical adsorption and dehydrogenation barriers of hydrocarbon were simulated based on the density functional theory(DFT)and the Climb-image nudged elastic band method,*** E-CVI process exhibited extremely high py C deposition rates of 8.7,11.5,16.5 and 22.7 nm/s at 700,750,800 and 850℃,respectively,together with a significantly low apparent activation energy of 57.9 k J/mol within the first 5 *** py C deposited at different temperatures with different time shows a smooth laminar structure with low coherent length and graphitization *** theoretical calculation and simulation results indicated that the electrons existing on the carbon fibers and the accelerated motion of radicals with preferred orientation forced by the derived magnetic field have reduced the energy barrier for the deposition process,thereby resulting in low apparent activation energy and high py C deposition *** results of this work may shed a light on how to better direct the preparation of C/C composites by E-CVI process with high quality and efficiency.

关键词： Electromagnetic-coupling chemical vapor infiltration CVI C/C composites Deposition mechanism

Mechanical properties and Oxidation Behaviors of Self-Healing SiCf/SiC-SiBCN Composites Exposed to H_(2)O/O_(2)/Na_(2)SO_(4)Environments

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Acta Metallurgica Sinica(English Letters) 2023年第11期36卷 1909-1923页

作者： Suya Ji Bin Liang Chenglong Hu Shengyang pang rida Zhao Jian Li Sufang Tang Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China

The oxidation behaviors and their influence on the mechanical properties of self-healing SiCf/SiC-SiBCN composites were investigated in H_(2)O/O_(2)and H_(2)O/O_(2)/Na_(2)SO_(4)environments at 1200‒1350℃for 100 *** the temperatures increase from 1200 to 1350℃,the oxidation rate constants increase from 0.45×10^(–7)to 1.58×10^(–7)mg^(2)/(mm^(4) h)in H_(2)O/O_(2),and from 1.02×10^(–7)to 3.42×10^(–7)mg^(2)/(mm^(4) h)in H_(2)O/O_(2)/Na_(2)SO_(4).The involvement of Na_(2)SO_(4)leads to the formation of a loose lamellar oxide layer,the breakage of the SiBCN/CVI-SiC interface and the decrease in the oxide viscosity,thus accelerating the oxidation of the *** composites show the maximum retention rate of strength(102%,535.71 Mpa)after oxidation in H_(2)O/O_(2)at 1200℃due to the good self-healing capacity of the produced glass,while the minimum(82%,430.56 Mpa)in H_(2)O/O_(2)/Na_(2)SO_(4)at 1350℃caused by the severe microstructural corrosion derived from Na_(2)SO_(4).

关键词： SiCf/SiC-SiBCN composite Mechanical property Oxidation Chemical vapor infiltration and polymer infiltration and pyrolysis(CVI-pIp) Self-healing