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Comparison of the reaction of polar mesosphere winter echoes and polar mesosphere summer echoes to high-frequency heating in terms of modulated characteristics

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Earth and Planetary Physics 2023年第2期7卷 247-256页

作者： Safi ullah HaiLong Li Abdur Rauf Shahid ullah khan sufyan ullah khan ShuCan Ge Bin Wang MaoYan Wang Lin Meng School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 610054China Department of Physics Riphah International University Islamabad CampusIslamabad 45210Pakistan Department of Physics University of Science and Technology BannuBannu 28101Pakistan National Key Laboratory of Electromagnetic Environment China Research Institute of Radiowave PropagationQingdao 266107China School of Physics University of Electronic Science and Technology of ChinaChengdu 610054China

In this work,for the first time,we have analyzed and compared the responses of polar mesosphere winter echoes(PMWE)and their summer counterpart,polar mesosphere summer echoes(PMSE),to high-frequency(HF)heating in terms of modulated characteristics(i.e.,backscatter intensity reduction,recovery,and overshoot).Both PMWE and PMSE observations were from the same site(Tromsφ,Norway;69.6°N,19.2°E)and radar(EISCAT[European Incoherent Scatter Scientific Association]very high frequency,224 MHz).The heating patterns of both PMWE and PMSE were found to be similar;however,PMSE was more greatly affected by HF *** mesosphere summer echoes showed recovery and overshoot more frequently than did *** addition,the mean recovery and overshoot of PMSE were greater than those of *** associated electron temperature enhancement was estimated for both PMWE and PMSE and showed that,compared with PMWE,the electron temperature enhancement was more significant in *** strong heating effects on PMSE may be due to the considerable increase in electron temperature.

关键词： polar mesosphere winter echo polar mesosphere summer echo electromagnetic wave heating experiment dusty plasma ionosphere

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Technical efficiency of hybrid maize growers: A stochastic frontier model approach

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Journal of Integrative Agriculture 2019年第10期18卷 2408-2421页

作者： Imad Ali HUO Xue-xi Imran khan Hashmat Ali khan Baz sufyan ullah khan College of Economics and Management Northwest A&F UniversityYangling 712100P.R.China School of Economics Dongbei University of Finance and EconomicsDalian 116025P.R.China School of Economics and Management China University of GeosciencesWuhan 430074P.R. China

This study investigated the effect of credit constraints and credit unconstraints on the technical efficiency of hybrid maize growers in the Khyber Pakhtunkhwa Province(KPK) of Pakistan. The primary data were collected by a direct elicitation method from 510 maize growers of KPK Province. Stochastic frontier model techniques were used for technical efficiency analyses. The results revealed that the mean technical efficiency difference between the two groups was 10.2%. The results of technical inefficiency effect modeling demonstrated that education of the household head, family size, number of married family members, off-farm income, farming experience, tractor drill, water irrigation through a lined course, certified seed, extension services, household saving variables, and a credit size variable had positive effects on technical efficiency for both credit constrained farmers(CCFs) and credit unconstrained farmers(UCCFs). In addition, age of household head and fragmented land values had negative effects on technical efficiency for both groups. However, the interest rate had positive and negative impacts on the technical efficiency of CCFs and UCCFs, respectively. Our results have significant implications for policies related to land use, interest rate, and banking sector expansion in the rural areas of Pakistan.

关键词： stochastic frontier analysis maize growers technical efficiency credit rationing and credit markets in Pakistan

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M_(4)X_(3) MXenes:Application in Energy Storage Devices

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Nano-Micro Letters 2024年第10期16卷 522-542页

作者： Iftikhar Hussain Waqas Ul Arifeen Shahid Ali khan Sikandar Aftab Muhammad sufyan Javed Sajjad Hussain Muhammad Ahmad Xi Chen Jiyun Zhao PRosaiah Khaled Fahmi Fawy Adnan Younis Sumanta Sahoo Kaili Zhang Department of Mechanical Engineering City University of Hong Kong83 Tat Chee AvenueKowloon TongHong KongPeople's Republic of China School of Mechanical Engineering Yeungnam UniversityDaehak-roGyeongsan-siGyeongbuk-do 38541South Korea Department of Semiconductor Systems Engineering and Clean Energy Sejong UniversitySeoul 05006Republic of Korea School of Physical Science and Technology Lanzhou UniversityLanzhou 730000People's Republic of China Department of Nanotechnology and Advanced Materials Engineering Sejong UniversitySeoul 05006Republic of Korea Department of Physics Saveetha School of EngineeringSaveetha Institute of Medical and Technical Sciences(SIMATS)ThandalamChennai 602105India Department of Chemistry Faculty of ScienceKing Khalid UniversityP.O.Box 900461413 AbhaSaudi Arabia Department of Physics College of ScienceUnited Arab Emirates UniversityP.O.Box 15551Al-AinUnited Arab Emirates School of Chemical Engineering Yeungnam UniversityGyeongsanGyeongbuk 38541South Korea

MXene has garnered widespread recognition in the scientific com-munity due to its remarkable properties,including excellent thermal stability,high conductivity,good hydrophilicity and dispersibility,easy processability,tunable surface properties,and admirable *** have been categorized into different families based on the number 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).Among these families,M_(2)X and M_(3)X_(2),par-ticularly Ti_(3)C_(2),have been greatly explored while limited studies have been given to M_(5)X_(4)MXene ***,studies on the M_(4)X_(3)MXene family have developed recently,hence,demanding a compilation of evaluated ***,this review provides a systematic overview of the latest advancements in M_(4)X_(3)MXenes,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)MXene-based nanomaterials,not only for energy storage devices but also for broader applications.

关键词： MXene M_(4)X_(3)MXenes 2D materials Energy storage Properties

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MXene异质结Ti-O-H-O电子快速通道促进高效率储钾

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无机材料学报 2024年

作者：晁少飞薛艳辉吴琼伍复发 Muhammad sufyan Javed 张伟辽宁工业大学材料科学与工程学院兰州大学物理科学与技术学院吉林大学材料科学与工程学院汽车材料教育部重点实验室吉林省高效清洁能源材料国际合作重点实验室电子显微镜中心未来科学国际合作联合实验室

二维层状结构MXenes因其优异的电学性能、可调控的表面官能团而被广泛应用于钾离子超级电容器领域，但其有限的双电容存储容量严重限制了MXenes材料在电极材料的应用。本工作采用“路易斯酸熔盐预刻蚀-液相刻蚀-原位水热复合”策略，制... 详细信息

二维层状结构MXenes因其优异的电学性能、可调控的表面官能团而被广泛应用于钾离子超级电容器领域，但其有限的双电容存储容量严重限制了MXenes材料在电极材料的应用。本工作采用“路易斯酸熔盐预刻蚀-液相刻蚀-原位水热复合”策略，制备出以Ti3C2为基体，表面包覆MnO2的Ti3C2基异质结构，以提高电极材料对钾离子的储存。采用基于密度泛函的第一性原理计算方法，研究了Ti3C2基异质结界面之间的连接方式、电学性质以及钾离子吸附规律的变化。结果表明构建的Ti3C2基异质结对钾离子的最大吸附量扩大3倍左右，且Ti-O-H-O连接通道使MnO2内部的自由电子数目增多，导致Ti3C2基异质结表现出优异的电学性能。三电极体系下的电化学测试结果表明Ti3C2基异质结在1 A·g–1的电流密度下能够提供431 F·g–1的比电容，远远高于Ti3C2(128F·g–1)。并通过的动力学分析阐述Ti3C2基异质结的赝电容储能机理，在100 mV·s–1的电压扫描速率下，其赝电容贡献度高达89%，此外Ti3C2基异质结表现出较小的电化学阻抗，从而提高钾离子传输速率、电子转移速率。本研究通过构筑Ti3C2基异质结，提高了基体Ti3C2的电化学性能，并阐述相应的储能机理，这为其他MXenes基电极材料的设计提供了理论基础。

关键词： Ti C 基异质结离子吸附动力学分析钾离子存储超级电容器

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Design and Implementation of a State-feedback Controller Using LQR Technique

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Computers, Materials & Continua 2022年第11期73卷 2897-2911页

作者： Aamir Shahzad Shadi Munshi sufyan Azam Muhammad Nasir khan Mechanical Engineering Department The University of LahoreLahorePakistan Mechanical Engineering Department Umm Al-Qura UniversityMakkahSaudi Arabia Electrical Engineering Department The University of LahoreLahorePakistan

The main objective of this research is to design a state-feedback controller for the rotary inverted pendulum module utilizing the linear quadratic regulator(LQR)*** controller maintains the pendulum in the inverted(upright)position and is robust enough to reject external disturbance to maintain its *** research work involves three major contributions:mathematical modeling,simulation,and real-time *** design a controller,mathematical modeling has been done by employing the NewtonEuler,Lagrange *** resulting model was nonlinear so linearization was required,which has been done around a working *** the estimation of the controller parameters,MATLAB LQR function has been *** has been performed for the designed controller and it also has been implemented and tested over the real inverted *** the results,it is vivid that the designed controller keeps the inverted pendulum in an upright position and rejects the disturbances and falling under gravitational force by adjusting the rotation of the horizontal link.

关键词： Mathematical modeling linearization linear quadratic regulator(LQR) nonlinear system rotary inverted pendulum

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A split target detection and tracking algorithm for ballistic missile tracking during the re-entry phase

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Defence Technology（防务技术） 2020年第6期16卷 1142-1150页

作者： Muhammad Asad Sumair khan Ihsanullah Zahid Mehmood Yifang Shi sufyan Ali Memon Uzair khan Department of Electrical and Computer Engineering COMSATS University IslamabadAbbottabad CampusPakistan Department of Computer Science COMSATS University IslamabadAbbottabad CampusPakistan Electrical Engineering Department Indus UniversityKarachiPakistan Department of Automation Hangzhou Dianzi UniversityXiasha Higher Education Zone2nd StreetHangzhou310018China

In the re-entry phase of a ballistic missile,decoys can be deployed as a mean to overburden enemy *** results in a single track being split into multiple *** of these track-lets is a critical task as any miss in the tracking procedure can become a cause of a major *** tracking process becomes more complicated in the presence of *** low detection rate is one of the factors that may contribute to increasing the difficulty level in terms of tracking in the cluttered *** work introduces a new algorithm for the split event detection and target tracking under the framework of the joint integrated probabilistic data association(JIPDA)*** proposed algorithm is termed as split event-JIPDA(SE-JIPDA).This work establishes the mathematical foundation for the split target detection and tracking *** performance analysis is made under different simulation conditions to provide a clear insight into the merits of the proposed *** performance parameters in these simulations are the root mean square error(RMSE),confirmed true track rate(CTTR)and confirmed split true track rate(CSTTR).

关键词： Split event probability JIPDA Data association Ballistic missile Estimation

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Moiré-superlattice MXenes enabled ultra-stable K-ion storage in neutral electrolyte

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Nano Research 2023年第4期16卷 5006-5017页

作者： Qiong Wu Yanhui Xue Shaofei Chao Fufa Wu Muhammad sufyan Javed Lu Li Wei Zhang School of Materials Science and Engineering Liaoning University of TechnologyJinzhou 121001China School of Physical Science and Technology Lanzhou UniversityLanzhou 730000China Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of EducationSchool of Physics and Electronic EngineeringHarbin Normal UniversityHarbin 150025China Key Laboratory of Automobile Materials MOE School of Materials Science&EngineeringJilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy MaterialsElectron Microscopy Centerand International Center of Future ScienceJilin UniversityChangchun 130012China

Ti_(3)C_(2)MXene is an auspicious energy storage material due to its metallic conductivity and layered ***,in the real working condition of electrochemical energy storage with long cycle charging-discharging,a structural collapse is usually caused by the stacking of its layers creating a large attenuation of specific *** by the superlattice effect of magic angle graphene,we conducted microscopical regulation of rotation mismatch on the Ti_(3)C_(2)lattice;consequently,a hexagonal fewlayered Ti_(3)C_(2)free-standing film constructed with Moiré-*** finding not only solves the problem of Ti_(3)C_(2)structural collapse but also dramatically improves the specific capacitance of Ti_(3)C_(2)as a supercapacitor electrode under long cycle charging and *** ultra-stable energy storage of this electrode material in a neutral aqueous electrolyte was ***,the formation mechanism of rotating Moirépattern is revealed through microscopy and microanalysis of the produced Moirépattern,assisted with modeling and analyzing the underlying mechanism between the Moirépattern and the rotation *** work provides experimental and theoretical support for future construction of Moiré-superlattice structure for a wide range of MXene phases and is undoubtedly promoting the development of MXene materials in the field of energy storage.

关键词： Ti_(3)C_(2)MXene Moiré-superlattice microwave-assisted etching specific capacitance

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Coordination and interface engineering to boost catalytic property of two-dimensional ZIFs for wearable Zn-air batteries

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Journal of Energy Chemistry 2022年第5期31卷 78-86页

作者： Hang Lei Shangjing Yang Qixiang Wan Liang Ma Muhammad sufyan Javed Shaozao Tan Zilong Wang Wenjie Mai Guangdong Engineering&Technology Research Centre of Graphene-Like Materials and Products Department of ChemistryCollege of Chemistry and Materials ScienceJinan UniversityGuangzhou 510632GuangdongChina Siyuan Laboratory Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy MaterialsDepartment of PhysicsJinan UniversityGuangzhou 510632GuangdongChina School of Physical Science and Technology Lanzhou UniversityLanzhou 730000GansuChina

Metal organic frameworks(MOFs) have been considered as compelling precursor for miscellaneous applications. However, their unsatisfied electrocatalytic performance limits their direct application as electrocatalyst. Herein, by incorporating the cobalt-oxide bonds and polyaniline(PANI) with two-dimension zeolitic imidazolate frameworks(ZIFs), a novel bifunctional catalyst(Co-O-ZIF/PANI) for Zn-air battery was designed based on a facile and eco-friendly method. This Co-O-ZIF/PANI with optimized surface adsorption effect and suitable Co^(3+)/Co^(2+)ratio, exhibits eminent electrocatalytic activity toward both oxygen reduction and evolution reaction. The as-assembled liquid ZABs based on Co-O-ZIF/PANI achieves a remarkable maximum power density of 123.1 m W cm^(-2) and low discharge-charge voltage gap of 0.81 V at 5 m A cm^(-2) for over 300 cycles. Operando Raman spectroscopy reveals that the excellent performance origins from the optimized surface chemisorption property of O_(2) and H_(2)O brought by Co–O bonds and PANI. This work provides a novel prospect to develop efficient MOF derived bifunctional electrocatalysts by optimizing surface chemisorption properties.

关键词： Zn-air batteries Wearable batteries Bifunctional electrocatalyst Operando Raman Zeolitic imidazolate frameworks

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Recent progress in flexible Zn-ion hybrid supercapacitors: Fundamentals, fabrication designs, and applications

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Carbon Energy 2023年第1期5卷 82-122页

作者： Muhammad sufyan Javed Sumreen Asim Tayyaba Najam Muhammad Khalid Iftikhar Hussain Awais Ahmad Mohammed A.Assiri Weihua Han School of Physical Science and Technology Lanzhou UniversityLanzhouGansuChina Institute of Chemistry Khwaja Fareed University of Engineering and Information TechnologyPunjabPakistan College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhenGuangdongChina Department of Mechanical Engineering City University of Hong KongKowloonHong KongChina Departamento de Quimica Organica Universidad de CordobaCordobaSpain Department of Chemistry Faculty of ScienceKing Khalid UniversityAbhaSaudi Arabia

One of the most exciting new developments in energy storage technology is flexible Zn-ion hybrid supercapacitors(f-ZIHSCs),which combine the high energy of Zn-ion batteries with high-power supercapacitors to satisfy the needs of portable flexible ***,the development of f-ZHSCs is still in its infancy,and there are numerous barriers to overcome before they can be widely implemented for practical *** review gives an up-to-date description of recent achievements and underlying concepts in energy storage mechanisms of f-ZIHSCs and emphasizes the critical role of cathode,anode,and electrolyte materials systems in speeding the prosperity of *** innovative nanostructured-based cathode materials for f-ZIHSCs include carbon(e.g.,porous carbon,heteroatom-doped carbon,biomass-derived porous carbon,graphene,etc.),metal-oxides,MXenes,and metal/covalentorganic frameworks,and other materials(e.g.,activated carbon,phosphorene,etc.)are mainly ***,the latest developments in flexible anode and electrolyte frameworks and impacts of electrolyte compositions on the electrochemical properties of f-ZIHSC are ***,the advancements based on fabrication designs,including quasi-solid-state,micro,fiber-shaped,and all climate-changed f-ZIHSCs,are discussed in ***,a summary of current challenges and recommendations for the future progress of advanced f-ZIHSC are *** review article is anticipated to further understand the viable strategies and achievable approaches for assembling high-performance f-ZIHSCs and boost the technical revolutions on cathode,anode,and electrolytes for f-ZIHSC devices.

关键词： electrode electrolyte flexible MOFs MXenes Zn-ion hybrid supercapacitor

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Animal- and Human-Inspired Nanostructures as Supercapacitor Electrode Materials: A Review

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Nano-Micro Letters 2022年第12期14卷 151-175页

作者： Iftikhar Hussain Charmaine Lamiel Sumanta Sahoo Muhammad sufyan Javed Muhammad Ahmad Xi Chen Shuai Gu Ning Qin Mohammed AAssiri Kaili Zhang Department of Mechanical Engineering City University of Hong Kong83 Tat Chee AvenueKowloonHong KongPeople’s Republic of China Department of Chemical Engineering University of WyomingLaramieWY 82071USA Department of Chemistry Madanapalle Institute of Technology and ScienceMadanapalleAndhra Pradesh 517325India School of Physical Science and Technology Lanzhou UniversityLanzhou 730000People’s Republic of China Department of Chemistry Faculty of ScienceKing Khalid UniversityAbha 61413Saudi Arabia

Human civilization has been relentlessly inspired by the nurturing lessons;nature is teaching *** birds to airplanes and bullet trains,nature gave us a lot of perspective in aiding the progress and development of countless industries,inventions,transportation,and many *** only that nature inspired us in such technological advances but also,nature stimulated the advancement of micro-and ***-inspired nanoarchitectures have been consid-ered a favorable structure in electrode materials for a wide range of *** offers various positive attributes,especially in energy storage applications,such as the formation of hierarchical two-dimen-sional and three-dimensional interconnected networked structures that benefit the electrodes in terms of high surface area,high porosity and rich surface textural features,and eventually,delivering high capacity and outstanding overall material *** this review,we compre-hensively assessed and compiled the recent advances in various nature-inspired based on animal-and human-inspired nanostructures used for *** comprehensive review will help researchers to accommodate nature-inspired nanostructures in industrializing energy storage and many other applications.

关键词： Nature-inspired nanostructure Supercapacitors Energy storage Animal-inspired and human-inspired nanostructures

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