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MXene@c-MWCNT Adhesive Silica Nanofiber Membranes Enhancing Electromagnetic Interference Shielding and Thermal Insulation Performance in Extreme Environments

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Nano-Micro Letters 2024年第10期16卷 82-98页

作者： Ziyuan Han Yutao Niu Xuetao Shi Duo Pan Hu Liu Hua Qiu Weihua Chen Ben Bin Xu Zeinhom MEl-Bahy Hua Hou Eman Ramadan Elsharkawy Mohammed Aamin Chuntai Liu Zhanhu Guo Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationNational Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002People's Republic of China School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026People's Republic of China Key Laboratory of Multifunctional Nanomaterials and Smart Systems Advanced Materials DivisionSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123People's Republic of China Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi'an 710072People's Republic of China College of Chemistry&Green Catalysis Center Zhengzhou UniversityZhengzhou 450001People's Republic of China Mechanical and Construction Engineering Faculty of Engineering and EnvironmentNorthumbria UniversityNewcastle Upon Tyne NE18UK Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr City 11884CairoEgypt Department of Chemistry Faculty of ScienceNorthern Border UniversityArarSaudi Arabia Department of Chemistry College of ScienceTaif UniversityP.O.Box 1109921944 TaifSaudi Arabia

A lightweight flexible thermally stable composite is fabricated by com-bining silica nanofiber membranes(SNM)with MXene@c-MWCNT hybrid *** flexible SNM with outstanding thermal insulation are prepared from tetraethyl orthosilicate hydrolysis and condensation by electrospinning and high-temperature calcination;the MXene@c-MWCNT_(x:y)films are prepared by vacuum filtration *** particular,the SNM and MXene@c-MWCNT_(6:4)as one unit layer(SMC_(1))are bonded together with 5 wt%polyvinyl alcohol(PVA)solution,which exhibits low thermal conductivity(0.066 W m^(-1)K^(-1))and good electromagnetic interference(EMI)shielding performance(average EMI SE_(T),37.8 dB).With the increase in func-tional unit layer,the overall thermal insulation performance of the whole composite film(SMC_(x))remains stable,and EMI shielding performance is greatly improved,especially for SMC_(3)with three unit layers,the average EMI SET is as high as 55.4 *** addition,the organic combination of rigid SNM and tough MXene@c-MWCNT_(6:4)makes SMC_(x)exhibit good mechanical tensile ***,SMC_(x)exhibit stable EMI shielding and excellent thermal insulation even in extreme heat and cold ***,this work provides a novel design idea and important reference value for EMI shielding and thermal insulation components used in extreme environmental protection equipment in the future.

关键词： SiO_(2)nanofiber membranes MXene@c-MWCNT Composite film Thermal insulation Electromagnetic interference shielding

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Big Data Analytics Using Graph Signal Processing

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Computers, Materials & Continua 2023年第1期74卷 489-502页

作者： Farhan amin Omar M.Barukab Gyu Sang Choi Department of Information and Communication Engineering Yeungnam UniversityGyeongsan38541Korea Faculty of Computing and Information Technology-Rabigh King Abdulaziz UniversityJeddahSaudi Arabia

The networks are fundamental to our modern world and they appear throughout science and *** to a massive amount of data presents a unique opportunity to the researcher’s *** networks grow in size the complexity increases and our ability to analyze them using the current state of the art is at severe risk of failing to keep ***,this paper initiates a discussion on graph signal processing for large-scale data *** first provide a comprehensive overview of core ideas in Graph signal processing(GSP)and their connection to conventional digital signal processing(DSP).We then summarize recent developments in developing basic GSP tools,including methods for graph filtering or graph learning,graph signal,graph Fourier transform(GFT),spectrum,graph frequency,*** filtering is a basic task that allows for isolating the contribution of individual frequencies and therefore enables the removal of *** then consider a graph filter as a model that helps to extend the application of GSP methods to large *** show the suitability and the effeteness,we first created a noisy graph signal and then applied it to the *** several rounds of simulation *** see that the filtered signal appears to be smoother and is closer to the original noise-free distance-based *** using this example application,we thoroughly demonstrated that graph filtration is efficient for big data analytics.

关键词： Big data data science big data processing graph signal processing social networks

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Intermittent swelling and shrinkage of a highly expansive soil treated with polyacrylamide

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Journal of Rock Mechanics and Geotechnical Engineering 2022年第1期14卷 252-261页

作者： amin Soltani An Deng Abbas Taheri Brendan C.O’Kelly School of Engineering Information Technology and Physical SciencesFederation UniversityChurchillVIC3842Australia School of Civil Environmental and Mining EngineeringThe University of AdelaideAdelaideSA5005Australia Department of Civil Structural and Environmental EngineeringTrinity College DublinDublinD02 PN40Ireland

This laboratory study examines the potential use of an anionic polyacrylamide(PAM)-based material as an environmentally sustainable additive for the stabilization of an expansive soil from South *** experimental program consisted of consistency limits,sediment volume,compaction and oedometer cyclic swell-shrink tests,performed using distilled water and four different PAM-to-water solutions of P_(D)=0.1 g/L,0.2 g/L,0.4 g/L and 0.6 g/L as the mixing ***,the relative swelling and shrinkage strains were found to decrease with increasing number of applied swell-shrink cycles,with an‘elastic equilibrium’condition achieved on the conclusion of four *** propensity for swelling/shrinkage potential reduction(for any given cycle)was found to be in favor of increasing the PAM dosage up to P_(D)=0.2 g/L,beyond which the excess PAM molecules self-associate as aggregates,thereby functioning as a lubricant instead of a flocculant;this critical dosage was termed‘maximum flocculation dosage’(MFD).The MFD assertion was discussed and validated using the consistency limits and sediment volume properties,both exhibiting only marginal variations beyond the identified MFD of P_(D)=0.2 g/*** accumulated axial strain progressively transitioned from‘expansive’for the unamended soil to an ideal‘neutral’state at the MFD,while higher dosages demonstrated undesirable‘contractive’states.

关键词： Expansive soil Polyacrylamide(PAM) Consistency limits Sediment volume Swell-shrink cycles Swelling and shrinkage strains Accumulated axial strain

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Bayesian Multidimensional Scaling for Location Awareness in Hybrid-Internet of Underwater Things

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IEEE/CAA Journal of Automatica Sinica 2022年第3期9卷 496-509页

作者： Ruhul amin Khalil Nasir Saeed Mohammad Inayatullah Babar Tariqullah Jan Sadia Din IEEE Department of Electrical Engineering Faculty of Electrical and Computer EngineeringUniversity of Engineering and TechnologyPeshawar 25120Pakistan the Department of Electrical Engineering Northern Border UniversityArar 73222Saudi Arabia College of Science and Engineering Hamad Bin Khalifa UniversityDoha 34110Qatar

Localization of sensor nodes in the internet of underwater things(IoUT)is of considerable significance due to its various applications,such as navigation,data tagging,and detection of underwater ***,in this paper,we propose a hybrid Bayesian multidimensional scaling(BMDS)based localization technique that can work on a fully hybrid IoUT network where the nodes can communicate using either optical,magnetic induction,and acoustic *** communication technologies are already used for communication in the underwater environment;however,lacking localization *** and magnetic induction communication achieves higher data rates for short *** the contrary,acoustic waves provide a low data rate for long-range underwater *** proposed method collectively uses optical,magnetic induction,and acoustic communication-based ranging to estimate the underwater sensor nodes’final ***,we also analyze the proposed scheme by deriving the hybrid Cramer-Rao lower bound(H-CRLB).Simulation results provide a complete comparative analysis of the proposed method with the literature.

关键词： Bayesian multidimensional scaling(BMDS) hybrid Cramer-Rao lower bound(H-CRLB) internet of underwater things(IoUT) signals of opportunity(SOA)approach

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Emerging roles of 3D-culture systems in tackling tumor drug resistance

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Cancer Drug Resistance 2023年第4期6卷 788-804页

作者： amin Nikdouz Francesca Orsoi Department of Translational Medicine University of Eastern PiedmontNovara 28100Italy

Drug resistance that affects patients universally is a major challenge in cancer *** development of drug resistance in cancer cells is a multifactor event,and its process involves numerous mechanisms that allow these cells to evade the effect of *** a result,the need to understand the molecular mechanisms underlying cancer drug sensitivity is *** 2D cell culture systems have been utilized to study drug resistance,but they often fail to mimic the 3D milieu and the architecture of real tissues and cell-cell *** a result of this,3D cell culture systems are now considered a comprehensive model to study drug resistance in *** cells exhibit an in vivo behavior when grown in a three-dimensional environment and react to therapy more *** this review,we discuss the relevance of main 3D culture systems in the study of potential approaches to overcome drug resistance and in the identification of personalized drug targets with the aim of developing patient-specific treatment strategies that can be put in place when resistance emerges.

关键词： Drug resistance 3D culture system extracellular matrix tumor microenvironment personalized medicine

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Optimal Synthesis of the Stephenson-Ⅱ Linkage for Finger Exoskeleton Using Swarm-based Optimization Algorithms

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Journal of Bionic Engineering 2023年第4期20卷 1569-1584页

作者： Seyyed Mojtaba Varedi-Koulaei Masoud Mohammadi Mohammad amin Malek Mohammadi Mahdi Bamdad Corrective Exercise and Rehabilitation Laboratory Department of Mechanical EngineeringShahrood University of TechnologyShahrood***Iran Department of Health Science and Technology Aalborg University9220AalborgDenmark

Active exoskeletons have been widely investigated to supplement and restore human hand movements,but a significant limitation is that they have a complicated design requiring multi *** Degree-Of-Freedom(DOF)planar linkage mechanisms could be used with simple *** research represents the design and optimization of a mechanism proposed for a finger exoskeleton bionic *** DOF six-bar linkage Stephenson-II is selected,and a motion-generation mechanism synthesis problem is *** design is based on the data obtained from the flexion/extension motion of the index finger through 16 precision points and 16 angles for each phalange associated with the fingertip *** explaining the kinematic analysis of the Stephenson-II,an evaluation of swarm intelligence techniques,including PSO,GWO,and ARO algorithms for solving optimization problems,is *** algorithm demonstrates the best performance among ***,the optimized mechanism in this study has a 50% error reduction compared to the one previously designed(Bataller et *** Mech Mach Theory 105:31-43,2016).

关键词： Mechanism synthesis Bionic Finger exoskeleton PSO GWO ARO

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Modeling the effect of uniform and nonuniform dispersion of nanofillers on electrical tree propagation in polyethylene dielectric

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Journal of Advanced Dielectrics 2022年第3期12卷 48-57页

作者： Khola Azhar Salman amin Electrical Engineering Department University of Engineering and TechnologyTaxilaPunjab 47080Pakistan

A phase-field model is developed in this paper based on the similarity between mechanical fracture and dielectric *** treeing is associated with the dielectric breakdown in solid dielectrics by the application of high *** of explicitly tracing the propagation of conductive channel,this model initializes a continuous phase field to characterize the extent of *** far,limited research has been conducted for simulating the effect of nanofiller dispersion on electrical *** study has modeled the effect of uniform and nonuniform dispersion of nanofillers with varying filler concentration on *** electrical treeing tends to decrease the breakdown strength of solid dielectrics therefore,nanofillers are widely used to distract the tree from a straight channel to distribute its energy in multiple *** a straight treeing channel into mul-tiple paths reduces the chances of its propagation from live to dead-end hence,improving the breakdown *** physical and chemical nature of nanofillers has a crucial impact on increasing the resistance to *** this paper,phase-field model is developed and used to simulate electrical treeing in polyethylene for varying concentrations of alumina nanofiller using COM-SOL *** inception time,tree-growth patterns,and corresponding changes in dielectric strength is studied for both *** treeing under different concentrations of alumina nanofillers with uniform and nonuniform dispersion is investigated in polyethylene as a base *** is observed that fillers with uniform dispersion increases the resistance to tree-ing and tree inception *** resistance to treeing is observed by adding 1%nanoalumina uniformly in raw ***,in uniform dispersion the tree deflects into multiple branches earlier than nonuniform dispersion impeding the damage speed as well.

关键词： Phase-field model dielectric breakdown resistance to treeing uniform and nonuniform filler dispersion

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目标责任制的强化护理在心肌梗死急救中的应用

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国际护理学杂志 2024年第11期43卷 1939-1943页

作者：陈颖徐华杨昆刘阿敏徐州医科大学附属医院急救中心徐州221000

目的观察在急诊心肌梗死护理中实施目标责任制的强化护理对患者预后康复效果的改善作用。方法将2020年1月至2023年1月期间在徐州医科大学附属医院收治的90例急性心肌梗死患者作为研究对象,根据随机数字法分为观察组和对照组,各45例。对... 详细信息

目的观察在急诊心肌梗死护理中实施目标责任制的强化护理对患者预后康复效果的改善作用。方法将2020年1月至2023年1月期间在徐州医科大学附属医院收治的90例急性心肌梗死患者作为研究对象,根据随机数字法分为观察组和对照组,各45例。对照组实施常规护理,观察组实施目标责任制的强化护理,对比两组干预前后心功能指标、抢救效率以及两组护理人员工作质量评分。结果干预前,两组心功能对比,差异无统计学意义(P>0.05);干预后,观察组患者各项心功能指标及抢救效率均高于对照组(P<0.05),且观察组护理人员工作质量评分高于对照组(P<0.05)。结论实施目标责任制的强化护理能够有效改善急诊心肌梗死患者心功能指标,提高抢救效率。

关键词：目标责任制强化护理急性心肌梗死心功能抢救效率

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Composition of carbohydrates, surfactants, major elements and anions in PM2.5 during the 2013 Southeast Asia high pollution episode in Malaysia

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Particuology 2018年第2期16卷 119-126页

作者： Shoffian amin Jaafar Mohd Talib Latif Intan Suraya Razak Nurul Bahiyah abd Wahid Md Firoz Khan Thunwadee Srithawirat School of Environmental and Natural Resource Sciences Faculty of Science and Technology Universiti Kebangsaan Malaysia 43600 Bangi Selangor Malaysia Institute for Environment and Development (Lestari) Universiti Kebangsaan Malaysia 43600 Bangi Selangor Malaysia Department of Biology Faculty of Science and Mathematics Universiti Pendidikan Sultan ldris 35900 Tanjung Malim Perak Malaysia Centre for Tropical Climate Change System (IKLIM) Institute of Climate Change Universiti Kebangsaan Malaysia 43600 Bangi Selangor Malaysia Department of Environmental Science Faculty of Science and Technology Pibulsongkram Rajabhat University Phitsanulok Thailand

Haze episodes have become a major concern in Malaysia over the past few decades and have an increasingly important impact on the country each and every year. During haze episodes from biomass burning in Southeast Asia, particularly from Sumatra, Indonesia, particulate matter PM2.5 is found to be one of the dangerous sources of airborne pollution and is known to seriously affect human health. This study determines the composition of carbohydrates （as levoglucosan）, surfactants, major elements, and anions in PM2.5 during a 2013 haze episode. PM2.5 samples were collected from Universiti Kebangsaan Malaysia, Bangi, using a high volume sampler during a seven-day monitoring campaign during the peak of that year＇s haze episode. PM2.5 concentrations ranged between 14.52 and 160.93 μg/m3, exceeding the 2005 WHO air quality guidelines for PM2.5 （25 μg/m3 for 24-h mean）. The patterns for levoglucosan, surfactants, major elements, and anionic compositions were proportional to the PM2.5 concentrations. Changes in PM2.5 observed on days 3 and 4 were influenced by a combination of meteorological factors, which substantiate the theory that such factors play a pivotal role in haze episodes.

关键词： Aerosol Biomass burning Levoglucosan Surfactant Haze Inorganic composition

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A machine vision-intelligent modelling based technique for in-line bell pepper sorting

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Information Processing in Agriculture 2023年第4期10卷 491-503页

作者： Khaled Mohi-Alden Mahmoud Omid Mahmoud Soltani Firouz amin Nasiri Department of Agricultural Machinery Engineering Faculty of Agricultural Engineering and TechnologyUniversity of TehranIran Department of Biosystems Engineering and Soil Science University of TennesseeKnoxvilleTN 37996USA

The uniformity of appearance attributes of bell peppers is significant for consumers and food *** automate the sorting process of bell peppers and improve the packaging quality of this crop by detecting and separating the not likable low-color bell peppers,developing an appropriate sorting system would be of high importance and *** to standards and export needs,the bell pepper should be graded based on maturity levels and size to five *** research has been aimed to develop a machine vision-based system equipped with an intelligent modelling approach for in-line sorting bell peppers into desirable and undesirable samples,with the ability to predict the maturity level and the size of the desirable bell *** perceptron(MLP)artificial neural networks(ANNs)as the nonlinear modelswere designed for that *** modelswere trained and evaluated through five-fold cross-validation *** optimum MLP classifier was compared with a linear discriminant analysis(LDA)*** results showed that the MLP outperforms the LDA *** processing time to classify each captured image was estimated as 0.2 s/sample,which is fast enough for in-line ***,the optimum MLP model was integrated with a machine vision-based sorting machine,and the developed system was evaluated in the in-line *** performance parameters,including accuracy,precision,sensitivity,and specificity,were 93.2%,86.4%,84%,and 95.7%,*** total sorting rate of the bell pepper was also measured as approximately 3000 samples/h.

关键词： Bell pepper Sorting Image processing Machine vision Multilayer perceptron Linear discriminant analysis

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