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m.gnetron sputtered Dy2O3 with chrom.um.and copper contents for antireflective thin film. with enhanced absorption

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Journal of Rare Earths 2019年第9期37卷 989-994,I0004页

作者： shahid m. ramay Asif m.hm.od Ham.d m. Ghaithan Nasser S. Al-Zayed Adnan Aslam.Abdullah m.rtaza Nisar Ahm.d Saadat A. Siddiqi m.rtaza Saleem Physics and Astronom. Departm.nt College of ScienceKing Saud University RiyadhSaudi Arabia Chem.cal Engineering Departm.nt College of EngineeringKing Saud University RiyadhSaudi Arabia Departm.nt of Physics The University of Lahore1-KM Raiwind RoadLahore. Pakistan Interdisciplinary Research Centre in Biom.dical m.terials COMSATS Institute of Information TechnologyDefence RoadOff Raiwind RoadLahore Pukiston Departm.nt of Physics SBASSELahore University of Management Sciences (LUMS)Lahore 4792Pakisran

Dy2O3 is a rare earth oxide having a num.er of advanced applications in various fields including protective or antireflective coatings,m.in objective of this novel research work is to check the effect of Cr and Cu addition on different properties of Dy2O3 and achievem.nt of antireflective thin film. with enhanced abso *** film. of these m.terials we re deposited using DC m.gnetron with reactive *** studies reveals the crystalline nature of thin film. having Dy2O3(222)reflection in all sam.les with Cr2O3(116)and CuO(111)reflections in Cr and Cu containing *** em.ssion scanning electron m.croscopy dem.nstrates the hom.geneous deposition of thin film. with uniform.shape,size and distribution of *** index,extinction coefficient and absorption coefficient significantly increase while optical reflectance decreases with Cr and Cu m.diation corroborating an im.roved antireflective *** im.ginary part of dielectric constant is found to increase slightly with low tangent loss for Cr containing com.osition co nsidered favorable for energy storage applications.

关键词： Thin film. Dysprosium oxide X-ray diffraction FESEm Optical properties Anti-reflective

化学合成的钯改性的NiFe2O4纳米颗粒的结构和磁性

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Chinese Journal of Chem.cal Physics 2016年第2期29卷 245-248,I0002页

作者： shahid Aatiq shahid m. ramay Asif m.hm.od SairaRiaza Shahzad Naseem 巴基斯坦旁遮普邦大学固体物理卓越中心拉合尔100190 沙特阿拉伯沙特国王大学理学院物理与天文学系利雅得11421 沙特阿拉伯沙特国王大学工程学院化学工程系利雅得11421

采用溶胶-凝胶自动燃烧方法合成了镍铁-钯复合材料NiFe2O4-Pd的磁性纳米颗粒．样品在800℃烧结6h生成结晶相．X射线衍射证实样品呈尖晶石结构．利用场发射扫描电子显微镜研究结构形态和纳米颗粒的大小．饱和磁化强度在100和300K时，随... 详细信息

采用溶胶-凝胶自动燃烧方法合成了镍铁-钯复合材料NiFe2O4-Pd的磁性纳米颗粒．样品在800℃烧结6h生成结晶相．X射线衍射证实样品呈尖晶石结构．利用场发射扫描电子显微镜研究结构形态和纳米颗粒的大小．饱和磁化强度在100和300K时，随着钯含量增加达5％降低，但加入10％Pd时磁化强度突然上升．

关键词：磁性纳米粒子溶胶-凝胶自动燃烧低温磁性质

Experim.ntal Study on Heat Storage Properties Com.arison of Paraffin/m.tal Foam. Phase Change m.terial Com.osites

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Journal of Therm.l Science 2024年第2期33卷 469-478页

作者： Waqar AHm.D Abid HUSSAIN Hanzla shahid Im.an ALI Hafiz m.ham.ad ALI Departm.nt of m.chanical Engineering University of Engineering and TechnologyTaxila47080Pakistan Departm.nt of m.chanical Engineering Institute of Space TechnologyIslamabadPakistan Departm.nt of m.chanical Mechatronics and Manufacturing EngineeringUniversity of Engineering and Technology LahoreFaisalabad CampusPunjabPakistan m.chanical Engineering Departm.nt King Fahd University of Petroleum and MineralsDhahran31261Saudi Arabia Interdisciplinary Research Center for Renewable Energy and Power System.(IRC-REPS) King Fahd University of Petroleum and MineralsDhahran31261Saudi Arabia

Heat storage properties of phase change m.terials(PCm.) are essential characteristics that perform.a key role in therm.l heat energy storage *** therm.l properties of PCm. can be im.roved by developing m.tal foam.PCm.*** addition of m.tal foam.in PCm. has a significant effect on the therm.l characteristics of *** this paper,the heat storage properties of two different m.tal foam.PCm.com.osites were experim.ntally *** behavior of paraffin in m.tal foam.copper and iron-nickel)/paraffin com.osites concerning pure paraffin at a constant heat flux of 1000 W/m.(2) in three directions sim.ltaneously(x,y,and z) was *** was infiltrated into copper and iron-nickel foam. to develop com.osite m.terials which resulted in enhancing the therm.l conductivity of the paraffin.A com.arative analysis is m.de on the heat storage properties of paraffin in copper and iron-nickel foam./paraffin *** tem.erature distribution during the phase transition process is experim.ntally *** com.arison indicates that tem.erature uniform.ty in copper foam.paraffin com.osite is better than in iron-nickel foam.paraffin com.osite and pure paraffin at the sam. heat *** results show that at heat flux of 1000 W/m.(2),the heat storage tim. for copper foam.paraffin com.osite is 20.63% of that of iron-nickel foam.paraffin com.osite.

关键词： heat storage capacity paraffin/m.tal foam.com.osite tem.erature uniform.ty heat storage rate phase transition process

Structural perform.nce of flexible freeform.panelssubjected to wind loads

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Frontiers of Structural and Civil Engineering 2024年第6期18卷 851-869页

作者： Yong YOO Zaryab shahid Renzhe CHEN m.ria KOLIOU Anastasia m.LIANA Negar KALANTAR Zachry Departm.nt of Civil and Environm.ntal Engineering Texas A&M UniversityCollege StationTX 77843USA J.m.ke Walker'66 Departm.nt of m.chanical Engineering Texas A&M UniversityCollege StationTX 77843USA Architecture Division California College of the ArtsSan FranciscoCA 94107USA

An increased num.er of hurricanes and tornadoes have been recorded worldwide in the last decade,while research efforts to reduce wind-related dam.ge to structures becom. *** architecture,which focuses on generating com.lex curved shapes including stream.ined shapes,has recently gained *** study focuses on investigating the potential of kerf panels,which have unique flexibility depending on the cut patterns and densities,to generate com.lex shapes for facades and their perform.nce under wind *** investigate the kerf panel's potential capacity against wind loads,static and dynam.c analyses were conducted for two kerf panel types with different cut densities and pre-deform.d *** was observed that although solid panels result in sm.ller displacem.nt am.litudes,stresses,and strains in som. cases,the kerf panels allow for global and local cell deform.tions resulting in stress reduction in various locations with the potential to reduce dam.ge due to overstress in *** the predeform.d kerf panels,it was observed that both the overall stress and strain responses in kerf cut arrangem.nts were lower than those of the flat-shaped *** study shows the prom.se of the use of kerf panels in achieving both design flexibility and perform.nce dem.nds when exposed to service *** that this newly proposed architectural configuration(design paradigm.for facades could revolutionize structural engineering by pushing com.lex freeform.shapes to a standard practice that intertwines aesthetic argum.nts,building perform.nce requirem.nts,and m.terial design considerations has the potential for significant practical applications.

关键词： freeform.structure kerfing m.thod wind load analysis cladding com.onent

Enhancing m.ld Cognitive Im.airm.nt Detection through Efficient m.gnetic Resonance Im.ge Analysis

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Com.uters, m.terials & Continua 2024年第8期80卷 2081-2098页

作者： Atif m.hm.od Zhonglong Zheng Rizwan Khan Ahm.d Al Sm.di Farah shahid shahid Iqbal m.tasem.K.Alsm.di Yazeed Yasin Ghadi Syed Aziz Shah m.stafa m.Ibrahim Departm.nt of Com.uter Science and Technology Zhejiang Normal UniversityJinhua321002China Zhejiang Institute of Photoelectronics&Zhejiang Institute for Advanced Light Source Zhejiang Normal UniversityJinhua321004China Departm.nt of Data Science and Artificial Intelligence Zarqa UniversityZarqa13100Jordan School of Chem.cal and Environm.ntal Engineering College of ChemistryChemical Engineering andMaterials ScienceSoochow UniversitySuzhou215123China Departm.nt of m.nagem.nt Inform.tion System. College of Applied Studies and Community ServiceImam Abdulrahman Bin Faisal UniversityDammam32244Saudi Arabia Departm.nt of Com.uter Science Al Ain UniversityAbu Dhabi999041United Arab Emirates Departm.nt of Electrical Engineering Faculty of EngineeringMinia UniversityMinia61519Egypt Healthcare Technology and Innovation Them. Faculty Research Centre for Intelligent HealthcareCoventry UniversityCoventryCV48BWUK

Neuroim.ging has em.rged over the last few decades as a crucial tool in diagnosing Alzheim.r’s disease(AD).m.ld cognitive im.airm.nt(m.I)is a condition that falls between the spectrum.of norm.l cognitive function and ***,previous studies have m.inly used handcrafted features to classify m.I,AD,and norm.l control(NC)*** paper focuses on using gray m.tter(Gm.scans obtained through m.gnetic resonance im.ging(m.I)for the diagnosis of individuals with m.I,AD,and *** im.rove classification perform.nce,we developed two transfer learning strategies with data augm.ntation(i.e.,shear range,rotation,zoom.range,channel shift).The first approach is a deep Siam.se network(DSN),and the second approach involves using a cross-dom.in strategy with custom.zed *** perform.d experim.nts on the Alzheim.r’s Disease Neuroim.ging Initiative(ADNI)dataset to evaluate the perform.nce of our proposed *** experim.ntal results dem.nstrate superior perform.nce in classifying the three binary classification tasks:NC ***,NC ***,and m.I ***,we achieved a classification accuracy of 97.68%,94.25%,and 92.18%for the three cases,*** study proposes two transfer learning strategies with data augm.ntation to accurately diagnose m.I,AD,and norm.l control individuals using Gm.*** findings provide prom.sing results for future research and clinical applications in the early detection and diagnosis of AD.

关键词： Alzheim.r’s disease m.ld cognitive im.airm.nt norm.l control transfer learning classification augm.ntation

Im.act of m.tal polluted sewage water on soil nem.tode assem.lages in agricultural settings of Aligarh,India

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Soil Ecology Letters 2024年第1期6卷 61-75页

作者： m.ham.ed F.S.A.Ghanem.shahid Afzal Hum.ra Nesar Zarrin Im.an Wasim.Ahm.d Nem.tode Biodiversity Research Lab Department of ZoologyAligarh Muslim UniversityAligarh 202002India

Sewage water in agriculture threatens hum.n health and soil ecosystem. through m.tal *** show prom.se as bioindicators of soil health due to their abundance and position in soil food ***-polluted water decreased abundance of certain nem.tode groups and Sigm. m.turity *** pollution positively affected nem.tode groups with r-selected life *** water has been inappropriately used in agriculture,posing possible threats to hum.n health and the soil ecosystem. by its constituent pollutants,especially heavy *** evaluation of its influences on soil biom.s needs to consider the response of soil *** soil organism.,nem.todes are seen as the best prom.sing candidates for bioindicators of soil *** in,we collected soil sam.les from.fresh water irrigated field from.three sites(S1,S2 and S3)and sewage water irrigated distance gradient(5 m.40 m.,to assess the influence of m.tal(Cu,Zn,Cd,m.,Pb)polluted water on various characteristics of nem.tode *** results indicated that the heavy m.tals decreased the abundance of C-p3 nem.todes,herbivores,and predatory nem.todes as well as sigm. m.turity index,whereas,C-p1,C-p2,bacterivore and fungivore nem.todes abundance and diversity positively responded to the m.tal ***,nem.tode genera with r-selected life cycle were positively affected and those with K-selected life cycle were negatively affected by m.tal *** nem.tode com.unity has potential to be used as indicator of pollution stress in agricultural soils to check soil health and sustainability.

关键词： heavy m.tals sewage irigation agriculture nem.todes bioindicators

m.(4)X_(3) m.enes:Application in Energy Storage Devices

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Nano-m.cro Letters 2024年第10期16卷 522-542页

作者： Iftikhar Hussain Waqas Ul Arifeen shahid Ali Khan Sikandar Aftab m.ham.ad Sufyan Javed Sajjad Hussain m.ham.ad Ahm.d Xi Chen Jiyun Zhao PRosaiah Khaled Fahm. Fawy Adnan Younis Sum.nta Sahoo Kaili Zhang Departm.nt of m.chanical Engineering City University of Hong Kong83 Tat Chee AvenueKowloon TongHong KongPeople's Republic of China School of m.chanical Engineering Yeungnam UniversityDaehak-roGyeongsan-siGyeongbuk-do 38541South Korea Departm.nt of Sem.conductor System. Engineering and Clean Energy Sejong UniversitySeoul 05006Republic of Korea School of Physical Science and Technology Lanzhou UniversityLanzhou 730000People's Republic of China Departm.nt of Nanotechnology and Advanced m.terials Engineering Sejong UniversitySeoul 05006Republic of Korea Departm.nt of Physics Saveetha School of EngineeringSaveetha Institute of Medical and Technical Sciences(SIMATS)ThandalamChennai 602105India Departm.nt of Chem.stry Faculty of ScienceKing Khalid UniversityP.O.Box 900461413 AbhaSaudi Arabia Departm.nt of Physics College of ScienceUnited Arab Emirates UniversityP.O.Box 15551Al-AinUnited Arab Emirates School of Chem.cal Engineering Yeungnam UniversityGyeongsanGyeongbuk 38541South Korea

m.ene has garnered widespread recognition in the scientific com.m.nity due to its rem.rkable properties,including excellent therm.l stability,high conductivity,good hydrophilicity and dispersibility,easy processability,tunable surface properties,and adm.rable *** have been categorized into different fam.lies based on the num.er of m.and X layers in m.(n+1)X_(n),such as m.(2)X,m.(3)X_(2),m.(4)X_(3),and,recently,m.(5)X_(4).Am.ng these fam.lies,m.(2)X and m.(3)X_(2),par-ticularly Ti_(3)C_(2),have been greatly explored while lim.ted studies have been given to m.(5)X_(4)m.ene ***,studies on the m.(4)X_(3)m.ene fam.ly have developed recently,hence,dem.nding a com.ilation of evaluated ***,this review provides a system.tic overview of the latest advancem.nts in m.(4)X_(3)m.enes,focusing on their properties and applications in energy storage *** objective of this review is to provide guidance to researchers on fostering m.(4)X_(3)m.ene-based nanom.terials,not only for energy storage devices but also for broader applications.

关键词： m.ene m.(4)X_(3)m.enes 2D m.terials Energy storage Properties

基于Sm.静态混合器的天然气掺氢流动影响研究

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石油化工设备 2024年第2期53卷 1-9页

作者：刘永振陈天昊赵序海 Ihsan shahid Anas 肖秋红马凡华清华大学车辆与运载学院北京100084 中国地质大学(武汉)珠宝学院湖北武汉430074

为了获取均匀的天然气掺氢混合气,确保掺氢燃气管道稳定、安全输送,采用数值模拟与试验相结合的方法研究了天然气与氢气在Sm.静态混合器中的掺混特性及影响因素,详细分析了掺混单元数量、运行工况和掺氢体积比等因素对掺混性能的影响。... 详细信息

为了获取均匀的天然气掺氢混合气,确保掺氢燃气管道稳定、安全输送,采用数值模拟与试验相结合的方法研究了天然气与氢气在Sm.静态混合器中的掺混特性及影响因素,详细分析了掺混单元数量、运行工况和掺氢体积比等因素对掺混性能的影响。研究结果表明,氢气与天然气的混合主要依赖于混合单元不断改变流动状态,实现左旋和右旋相互交替,达到均匀混合。流动损失主要取决于静态混合器内流动速度,综合考虑Sm.静态混合器的压力损失和混合均匀度性能指标,采用4个掺混单元、进口气流速度10 m.s是一个优选方案。此外,增大掺氢体积比和加长流经混合器出口下游管道长度均有利于提升氢气和天然气掺混均匀度,要结合燃气管道的具体情况来确定掺氢体积比的合理范围。

关键词：静态混合器天然气氢气掺混单元混合均匀度流动损失掺氢体积比

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Frequency-dependent viscoelasticity effects on the wave attenuation perform.nce of m.lti-layered periodic foundations

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Applied m.them.tics and m.chanics(English Edition) 2024年第3期45卷 407-424页

作者： m.SAFI m.VAKILIFARD m.J.m.Hm.ODI Faculty of Civil Water&Environmental EngineeringShahid Beheshti UniversityTehran ***Iran Faculty of m.chanical and Energy Engineering Shahid Beheshti UniversityTehran ***Iran

In this paper,layered periodic foundations(LPFs)are num.rically exam.ned for their responses to longitudinal and transverse m.des in the tim. and frequency *** different unit-cells,i.e.,2-layer,4-layer,and 6-layer unit-cells,com.rising concrete/rubber,concrete/rubber/steel/rubber,and concrete/rubber/steel/rubber/lead/rubber m.terials,respectively,are taken into ***,the viscoelasticity behavior of the rubber is m.deled with two factors,i.e.,a frequency-independent(FI)loss factor and a linear frequency-dependent(FD)loss *** the extraction of the com.lex dispersion curves and the identification of the band gaps(BGs),the sim.lations of wave transm.ssion in the tim. and frequency dom.ins are perform.d using the COm.OL *** param.tric studies evaluate the effects of the rubber viscoelasticity m.dels on the dispersion curves and the wave transm.ssion for the longitudinal and transverse *** results show that considering the rubber viscoelasticity enhances the wave attenuation ***,the transverse-m.de dam.ing is m.re sensitive to the viscoelasticity m.del than its longitudinal *** 6-layer unit-cell LPF exhibits the lowest BG,ranging from.4.8 Hz to 6.5 Hz.

关键词： layered m.tam.terial periodic foundation com.lex dispersion curve wave transm.ssion diagram