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Thermal Radiation Effects on 2D Stagnation Point Flow of a Heated Stretchable Sheet with Variable Viscosity and MHD in a Porous Medium

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Frontiers in Heat and Mass Transfer 2024年第1期22卷 263-286页

作者： muhammad Abaid Ur Rehman muhammad asif farooq Ahmed M.Hassan Department of Mathematics School of Natural Sciences(SNS)National University of Sciences and Technology(NUST)Sector H-12Islamabad44000Pakistan Faculty of Engineering Future University in EgyptNewCarioEgypt

This paper proposes a mathematical modeling approach to examine the two-dimensional flow stagnates at x=0 over a heated stretchable sheet in a porous medium influenced by nonlinear thermal radiation,variable viscosity,and *** study’s main purpose is to examine how thermal radiation and varying viscosity affect fluid flow ***,we consider the convective boundary conditions and incorporate the gyrotactic microorganisms equation,which describes microorganism behavior in response to fluid *** partial differential equations(PDEs)that represent the conservation equations for mass,momentum,energy,and microorganisms are then converted into a system of coupled ordinary differential equations(ODEs)through the inclusion of nonsimilarity *** MATLAB’s built-in solver bvp4c,the resulting ODEs are numerically *** model’s complexity is assessed by plotting two-dimensional graphics of the solution profiles at various physical parameter *** physical parameters considered in this study include skin friction coefficient,local Nusselt number,local Sherwood number,and density of motile *** parameters measure,respectively,the roughness of the sheet,the transformation rate of heat,the rate at which mass is transferred to it,and the rate at which microorganisms are transferred to *** study shows that,depending on the magnetic parameter M,the presence of a porous medium causes a significant increase in fluid velocity,ranging from about 25%to 45%.Furthermore,with an increase in the Prandtl number Pr,we have seen a notable improvement of about 6%in fluid thermal ***,our latest findings are in good agreement with published research for particular *** study provides valuable insights into the behavior of fluid flow under various physical conditions and can be useful in designing and optimizing industrial processes.

关键词： Stagnation point flow variable viscosity variable thermal properties heat source/sink nanofluid

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Understanding the low temperature electrochemistry of magnesium-lithium hybrid ion battery in all-phenyl-complex solutions

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Journal of Energy Chemistry 2021年第5期30卷 383-390页

作者： muhammad Rashad muhammad asif School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003JiangsuChina Bernal Institute Department of Chemical SciencesUniversity of LimerickLimerick V94 T9PXIreland

Magnesium-lithium hybrid ion batteries have emerged as a new class of energy storage systems owing to dendrite free cycling of magnesium anode and possibility of practice of numerous conventional lithium *** present work,we used hybrid ion strategy to analyze the performance of lithium titanate based lithium cathode,magnesium metal anode,and all-phenyl complex(APC)electrolytes at different temperatures(25℃,10℃,0℃,-10℃,and-20℃).The hybrid ion battery exhibited excellent rate performance(228 m Ah g^(-1)/20 m A g^(-1) and 163 mAh g^(-1)/1000 mA g^(-1))with stable voltage plateaus at 0.90 and 0.75 V,which corresponds to specific energy of 178 Wh kg^(-1) at room temperature(25℃).Experimental results revealed that APC-THF solutions have strong potential to suppress the freezing of electrolyte solutions owing to low boiling point of *** low temperature electrochemical testing revealed the reversible capacities of 213.4,165.5,143.8,133.2 and 78.56 mAh g^(-1) at 25,10,0,-10,and-20℃,***,ex-situ XRD,SEM,and EIS tests were carried out to understand the reaction kinetics of both Mg2+and Li+ions inside the lithium titanate *** hope this work will shed light on low temperature prospective of electrochemical devices for use in cold environments.

关键词： Mg ion battery Mg-Li hybrid ion batteries Electrochemical properties Low temperature Energy storage

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Progress in electrocatalytic nitrate reduction for green energy:Catalyst engineering,mechanisms,and techno-economic feasibility

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Journal of Energy Chemistry 2024年第8期95卷 380-406,I0009页

作者： Hafiz muhammad Adeel Sharif Hafiz muhammad farooq Khan Sadeeq Ullah Yuwei Wang muhammad Ahmad Bo Yang Changping Li muhammad Bilal asif Research Center for Eco-Environmental Engineering Dongguan University of TechnologyDongguan 523808GuangdongChina College of Chemistry and Engineering Shenzhen UniversityShenzhen 518060GuangdongChina FMH College of Medicine and Dentistry LahorePakistan School of Environment and Civil Engineering Research Center for Eco-Environment EngineeringDongguan University of TechnologyDongguan 523106GuangdongChina Advanced Membranes and Porous Materials Center(AMPMC) Physical Sciences and Engineering(PSE)King Abdullah University of Science and Technology(KAUST)Thuwal 23955Saudi Arabia

Ammonia(NH_(3))is an irreplaceable chemical that has been widely demanded to keep the sustainable development of modern ***,its industrial production consumes a huge amount of energy and releases extraordinary greenhouse gases(GHGs),leading to various environmental *** the green production of ammonia is a great challenge,which has been extensively pursued in the last *** this review,the most promising strategy,electrochemical nitrate reduction reaction(e-NO_(3)RR),is comprehensively investigated to give a complete understanding of its development and mechanism and provide guidance for future ***,owing to the complex reactions and limited selectivity,a comprehensive understanding of the mechanisms is crucial to further development and ***,NO_(3)^(-)RR is a promising strategy for simultaneous water treatment and NH_(3)production.A detailed overview of the recent progress in NO_(3)^(-)RR for NH_(3)production with nontransition and transition metal based electrocatalysts is *** addition,critical advanced techniques,future challenges,and prospects are discussed to guide future research on transition metal-based catalysts for commercial NH_(3)synthesis by NO_(3)^(-)reduction.

关键词： Nitrate reduction Electrolysis Pollution to solution Transition metal catalysts Ammonia synthesis Green energy

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Unsupervised neural networks for solving Troesch＇s problem

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Chinese Physics B 2014年第1期23卷 546-556页

作者： muhammad asif Zahoor Raja Department of Electrical Engineering COMSATS Institute of Information Technology Attock Campus Attock Pakistan

In this study, stochastic computational intelligence techniques are presented for the solution of Troesch's boundary value problem. The proposed stochastic solvers use the competency of a feed-forward artificial neural network for mathematical modeling of the problem in an unsupervised manner, whereas the learning of unknown parameters is made with local and global optimization methods as well as their combinations. Genetic algorithm (GA) and pattern search (PS) techniques are used as the global search methods and the interior point method (IPM) is used for an efficient local search. The combination of techniques like GA hybridized with IPM (GA-IPM) and PS hybridized with IPM (PS-IPM) are also applied to solve different forms of the equation. A comparison of the proposed results obtained from GA, PS, IPM, PS-IPM and GA-IPM has been made with the standard solutions including well known analytic techniques of the Adomian decomposition method, the variational iterational method and the homotopy perturbation method. The reliability and effectiveness of the proposed schemes, in term of accuracy and convergence, are evaluated from the results of statistical analysis based on sufficiently large independent runs.

关键词： Troesch’s problem artificial neural network genetic algorithm hybrid methods

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Identification of Anomalous Behavioral Patterns in Crowd Scenes

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Computers, Materials & Continua 2022年第4期71卷 925-939页

作者： muhammad asif Nauman muhammad Shoaib Department of Computer Engineering University of Engineering and TechnologyLahorePakistan

Real time crowd anomaly detection and analyses has become an active and challenging area of research in computer vision since the last *** emerging need of crowd management and crowd monitoring for public safety has widen the countless paths of deep learning methodologies and ***,researchers have developed many sophisticated algorithms but still it is a challenging and tedious task to manage and monitor crowd in real *** proposed research work focuses on detection of local and global anomaly detection of *** of spatial-temporal features assist in differentiation of feature trained using Mask R-CNN with Resnet101 as a backbone architecture for feature *** data from,BIWI Walking Pedestrian dataset and the Crowds-By-Examples(CBE)dataset and Self-Generated dataset has been used for *** data deals with different situations like one set of data deals with normal situations like people walking and acting individually,in a group or in a dense *** other set of data contains images four unique anomalies like fight,accident,explosion and people behaving *** simulated results show that in terms of precision and recall,our system performs well with Self-Generated ***,our system uses an early stopping mechanism,which allows our system to outperform to make our model *** is why,on 89th epoch our system starts generating finest results.

关键词： Mask R-CNN crowd management and monitoring precision and recall

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Non-Associative Algebra Redesigning Block Cipher with Color Image Encryption

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Computers, Materials & Continua 2021年第4期67卷 1-21页

作者： Nazli Sanam asif Ali Tariq Shah Ghazanfar farooq Department of Mathematics Quaid-i-Azam UniversityIslamabad44000Pakistan Department of Computer Science Quaid-i-Azam UniversityIslamabad44000Pakistan

The substitution box(S-box)is a fundamentally important component of symmetric key *** S-box is a primary source of non-linearity in modern block ciphers,and it resists the linear *** approaches have been adopted to construct S-boxes.S-boxes are commonly constructed over commutative and associative algebraic structures including Galois fields,unitary commutative rings and cyclic and non-cyclic finite *** this paper,first a non-associative ring of order 512 is obtained by using computational techniques,and then by this ring a triplet of 8×8 S-boxes is *** motivation behind the designing of these S-boxes is to upsurge the robustness and broaden the key space due to non-associative and noncommutative behavior of the algebraic structure under consideration.A novel color image encryption application is anticipated in which initially these 3 S-boxes are being used to produce confusion in three layers of a standard RGB ***,for the sake of diffusion 3D Arnold chaotic map is used in the proposed encryption scheme.A comparison with some of existing chaos and S-box dependent color image encryption schemes specs the performance results of the anticipated RGB image encryption and observed as approaching the standard prime level.

关键词： Block cipher s-box nonlinearity color image encryption 3D chaotic map

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Debating the magnesium-selenium battery technology

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Journal of Magnesium and Alloys 2020年第4期8卷 980-988页

作者： muhammad Rashada Syed Danish Ali Zaidi muhammad asif School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003JiangsuChina Advanced Rechargeable Batteries Laboratory Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Department of Chemical Sciences School of Natural SciencesUniversity of LimerickLimerick V94 T9PXIreland

Magnesium ion batteries(MIBs)have received tremendous research attention owing to their low cost,dendrite free electroplating,and high theoretical capacities compared with lithium ion batteries(LIBs).Despite these advantages,the launching of MIBs is hindered by sluggish kinetics of the magnesium ions inside the host ***,several magnesium-selenium batteries have been developed to achieve the fast kinetics of magnesium ions inside the selenium-based ***,we have critically reviewed the five-year advancements made in the field of selenium cathode design,selenium loadings,compatible organic and inorganic electrolytes,their resultant reversible capacities,working voltages,cycle life,and specific *** selenium-based cathodes were critically debated in terms of their electrochemical performance and *** the end of this review article,several irmovative directions are proposed to shed light on future research.c 2020 Published by Elsevier *** behalf of Chongqing University.

关键词： Magnesium-selenium batteries Energy storage Selenium cathodes Electrolytes Electrochemical properties

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Enhanced ductility of Mg–3Al–1Zn alloy reinforced with short length multiwalled carbon nanotubes using a powder metallurgy method

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Progress in Natural Science:Materials International 2015年第4期25卷 276-281页

作者： muhammad Rashad Fusheng Pan muhammad asif Li Li College of Materials Science and Engineering Chongqing University National Engineering Research Center for Magnesium Alloys Chongqing University Chongqing Academy of Science and Technology School of Materials Science and Engineering Dalian University of Technology

Mg–3Al–1Zn–CNTs composites, with different weight fractions(0.25–1.0 wt%) of carbon nanotubes(CNTs) were successfully fabricated via a powder metallurgy method. The processing parameters were adopted in such a way to have uniform dispersion of short length CNTs without any damage, as well as re fi ned and dissolved β phases structures throughout the composite matrix. The composite exhibited impressive increase in microhardness(about+23%) and tensile failure strain value(about+98%) without signi fi cant compromise in tensile strength, compared to the un-reinforced Mg–3Al–1Zn alloy. The synthesized composites can be used in automotive and aerospace industries due to their low density and high speci fic strength.

关键词： Metal matrix composites Mechanical properties Powder processing

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Genetic variability predicting breeding potential of upland cotton(Gossypium hirsutum L.)for high temperature tolerance

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Journal of Cotton Research 2023年第2期6卷 81-97页

作者： farooq Amjad SHAKEEL Amir SAEED asif farooq Jehanzeb RIZWAN muhammad CHATTHA Waqas Shafqat SARWAR Ghulam RAMZAN Yasir Cotton Research Station Ayub Agricultural Research InstituteFaisalabad 38000Pakistan Department of Plant Breeding and Genetics University of AgricultureFaisalabad 38040Pakistan

Background High temperature stress at peak flowering stage of cotton is a major hindrance for crop *** study aimed to increase genetic divergence regarding heat tolerance in newly developed cultivars and *** cotton genotypes and 40 F1(hybrids)were tested under field conditions following the treatments,viz.,high temperature stress and control at peak flowering stage in August and October under April and June sowing,*** The mean squares revealed significant differences among genotypes,treatments,genotype×treatment for relative cell injury,chlorophyll contents,canopy temperature,boll retention and seed cotton yield per *** genetic diversity among 50 genotypes was analyzed through cluster analysis and heat susceptibility index(HSI).The heat tolerant genotypes including FH-Noor,NIAB-545,FH-466,FH-Lalazar,FH-458,NIAB-878,IR-NIBGE-8,Weal-AGShahkar,and heat sensitive,i.e.,CIM-602,Silky-3,FH-326,SLH-12 and FH-442 were hybridized in line×tester fashion to produce F1 *** breeding materials’populations(40 F1)revealed higher specific combining ability variances along with dominance variances,decided the non-additive type gene action for all the *** best general combining ability effects for most of the traits were displayed by the lines,i.e.,FH-Lalazar,NIAB-878 along with testers FH-326 and *** combining ability effects and better-parent heterosis were showed by the crosses,viz.,FH-Lalazar×Silky-3,FH-Lalazar×FH-326,NIAB-878×Silky-3,and NIAB-878×FH-326 for seed cotton yield and yield contributing traits under high temperature *** Heterosis breeding should be carried out in the presence of non-additive type gene action for all the studied *** best combiner parents with better-parent heterosis may be used in crossing program to develop high yielding cultivars,and hybrids for high temperature stress tolerance.

关键词： High temperature Upland cotton Peak flowering Heterosis Gene action Combining ability

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NewBee: Context-Free Grammar (CFG) of a New Programming Language for Novice Programmers

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Intelligent Automation & Soft Computing 2023年第7期37卷 439-453页

作者： muhammad Aasim Qureshi muhammad asif Saira Anwar Department of Computer Science Bahria University Lahore54000Pakistan Department of Law Science and TechnologyUniversity of Bologna40126Italy Department of Multidisciplinary Engineering Texas A&M UniversityCollege Station77843USA

Learning programming and using programming languages are the essential aspects of computer science *** use programming languages to write their *** computer programs(students or practitioners written)make computers artificially intelligent and perform the tasks needed by the *** these programs,the computer may be visioned as a pointless *** the premise of writing programs is situated with specific programming languages,enormous efforts have been made to develop and create programming ***,each program-ming language is domain-specific and has its nuances,syntax and seman-tics,with specific pros and *** language-specific details,including syntax and semantics,are significant hurdles for novice ***,the instructors of introductory programming courses find these language specificities as the biggest hurdle in students learning,where more focus is on syntax than logic development and actual implementation of the *** the conceptual difficulty of programming languages and novice students’struggles with the language syntax,this paper describes the design and development of a Context-Free Grammar(CFG)of a programming language for the novice,newcomers and students who do not have computer science as their *** to its syntax proximity to daily conversations,this paper hypothesizes that this language will be easy to use and understand by novice *** paper systematically designed the language by identifying themes from various existing programming languages(e.g.,C,Python).Additionally,this paper surveyed computer science experts from industry and academia,where experts self-reported their satisfaction with the newly designed *** results indicate that 93%of the experts reported satisfaction with the NewBee for novice,newcomer and non-Computer Sci-ence(CS)major students.

关键词： Programming language formal language computer language language grammar simple syntax programming language novice programmer

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