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Chinese Journal of Aeronautics 2013年第6期26卷 1389-1397页

作者： Noreen sher Akbar s.Nadeem Rizwan Ul Haq Z.H.khan DBs&H CEMENational University of Sciences and TechnologyIslamabad 44000Pakistan Department of Mathematics Quaid-i-Azam UniversityIslamabad 44000Pakistan school of Mathematical sciences Peking University

The aim of the present paper is to study the numerical solutions of the steady MHD two dimensional stagnation point flow of an incompressible nano fluid towards a stretching *** effects of radiation and convective boundary condition are also taken into *** model used for the nanofluid incorporates the effects of Brownian motion and *** resulting nonlinear momentum,energy and nano particle equations are simplifed using similarity *** solutions have been obtained for the velocity,temperature and nanoparticle fraction *** influence of physical parameters on the velocity,temperature,nanoparticle fraction,rates of heat transfer and nanoparticle fraction are shown graphically.

关键词： Convective boundary condition Nanoparticles Numerical solutions Radiation effects stagnation point stretching surface

synthesis of ZrsiN composite films using a plasma focus device

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Chinese Physics B 2014年第6期23卷 381-386页

作者： R.Ahmad T.Hussain I.A.khan R.s.Rawat Center for Advanced studies in Physics GC University Physics Department GC Universit National Institute of Education Nanyang Technological University

ZrsiN thin films are synthesized by using plasma focus through various numbers of focus shots （10, 20, and 30）, with samples placed at 9 cm away from the tip of the anode. Crystal structures, surface morphologies, and elemental compositions of ZrsiN films are characterized by an X-ray diffractometer （XRD） and scanning electron microscope （sEM） attached with energy dispersive X-ray spectroscopy （EDs）. XRD patterns confirm the formations of polycrystalline ZrsiN films. Crystallinity of nitride increases with the increase of focus shot number. The average crystallite size of zirconium nitride increases from 27 ± 3 nm to 73±8 nm and microstrain decreases from 2.28 to 1.0 with the increase of the focus shot number. sEM results exhibit the formations of granular and oval-shaped microstructures, depending on the number of focus shots. EDs results confirm the presences of silicon, zirconium, nitrogen, and oxygen in the composite films. The content values of Zr and N in the composite films increase with the increase of the focus shot number.

关键词： DPF ZrsiN thin films XRD sEM

Rare earth element(REE) geochemistry of phosphorites of the sonrai area of Paleoproterozoic Bijawar basin,Uttar Pradesh,India

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Journal of Rare Earths 2012年第5期30卷 507-514页

作者： K.F.khan shamim A.Dar saif A.khan Department of Geology Aligarh Muslim UniversityAligarh-202002Uttar PradeshIndia

The rare earth element（REE） data from the Paleoproterozoic Bijawar basin,sonrai phosphorites were used to interpret the depositional conditions of the *** post archean Australian shales（PAAs） normalized REE patterns of the sonrai phosphorites were characterized by negative Ce and positive Eu *** rare earth elements（MREE）-enrichment was a characteristic *** showing the diagenetic effects on the REE patterns were *** observed Eu anomaly was indicative of an anoxic（or sulphate reducing） diagenetic environment of phosphate *** of sea water and upwelling during the Paleoproterozoic was responsible for the recording of positive Eu and negative Ce anomalies in the sonrai phosphorites.

关键词： rare earth elements geochemistry phosphorites sonrai Bijawar basin Ce anomaly Eu anomaly

Multiuser Detection for MIMO-OFDM system in Underwater Communication Using a Hybrid Bionic Binary spotted Hyena Optimizer

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Journal of Bionic Engineering 2021年第2期18卷 462-472页

作者： Md Rizwan khan Bikramaditya Das Department of Electronics&Telecommunication Engineering VSS University of TechnologyBurla-768018OdishaIndia

Multi Access Interference (MAI) is the main source limiting the capacity and quality of the Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) system which fulfills the demand of high-speed transmission rate and high quality of service for future underwater acoustic (UWA) communication. Multi User Detection (MUD) is needed to overcome the performance degradation caused by MAI. In this research, both local and global optimal solutions are obtained in Bionic Binary spotted Hyena Optimizer (BBsHO) algorithm using the Position Coordinate Vectors (PCVs) of the social behavior of spotted hyenas to achieve MUD. Further, Extremal Optimization (EO) is introduced in BBsHO algorithm to improve the local search ability within the search space. Hence, a hybrid BBsHO algorithm is proposed for achieving MUD at the receiver of the MIMO-OFDM system whose transceiver model in underwater is implemented using BELLHOP simulation system. By MATLAB simulation, it is shown that the Bit Error Rate (BER) performance of the proposed hybrid algorithm outperforms with best optimal solution within the search space towards MUD for Interference to Noise Ratio (INR) at 10 dB, 20 dB, and 40 dB over conventional detectors and metaheuristic approaches such as Binary spotted Hyena Optimizer (BsHO), Binary Particle swarm Optimization (BPsO) in the UWA network.

关键词： Underwater Acoustic(UWA) Orthogonal Frequency Division Multiplexing(OFDM) Multiuser Detection(MUD) Multi-Access Interference(MAI) Bionic Binary spotted Hyena Optimizer(BBsHO) Extremal Optimization(EO)

Time stepping in discontinuous Galerkin method

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Journal of Hydrodynamics 2013年第3期25卷 321-329页

作者： LAI Wencong khan Abdul A Glenn Department of Civil Engineering Clemson University Clemson S.C. USA

The time discretization in the Discontinuous Galerkin （DG） scheme has been traditionally based on the Total Variation Diminishing （TVD） second-order Runge-Kutta （RK2） scheme. Computational efficiency and accuracy with the Euler Forward （EF） and the TVD second-order RK2 time stepping schemes in the DG method are investigated in this work. Numerical tests are condu- cted with the scalar Burgers equation, 1-D and 2-D shallow water flow equations. The maximum Courant number or time step size required for stability for the EF scheme and RK2 scheme with different slope limiters are compared. Numerical results show that the slope limiters affect the stability requirement in the DG method. The RK2 scheme is generally more diffusive than the EF scheme, and the RK2 scheme allows larger time step sizes. The EF scheme is found to be more efficient and accurate than the RK2 scheme in the DG method in computation.

关键词： Discontinuous Galerkin (DG) method Euler Forward (EF) scheme second-order Runge-Kutta scheme

skeletal muscle stiffness as measured by magnetic resonance elastography after chronic spinal cord injury:a cross-sectional pilot study

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Neural Regeneration Research 2021年第12期16卷 2486-2493页

作者： Mina P.Ghatas M.Rehan khan Ashraf s.Gorgey Department of spinal Cord Injury and Disorders Hunter Holmes McGuire VA Medical CenterRichmondVAUSA Department of Radiology Hunter Holmes McGuire VA Medical CenterRichmondVAUSA Department of Physical Medicine and Rehabilitation Virginia Commonwealth UniversityRichmondVAUSA

skeletal muscle stiffness is altered after spinal cord injury(sCI).Assessing muscle stiffness is essential for rehabilitation and pharmaceutical interventions design after *** study used magnetic resonance elastography to assess the changes in stiffness after chronic sCI compared to matched able-bodied controls and determine its association with muscle size,spasticity,and peak torque in persons with *** studies examined the association between muscle stiffness and spasticity,however,we are unaware of other studies that examined the effects of muscle composition on stiffness after *** participants(one female)with chronic sCI and eight(one female)matched able-bodied controls participated in this cross-sectional *** resonance elastography was utilized to monitor stiffness derived from shear waves *** Ashworth scale was used to evaluate spasticity scores in a blinded *** isometric and isokinetic torques were measured using a biodex *** values were non-significantly lower(12.5%;P=0.3)in the sCI group compared to able-bodied ***,stiffness was positively related to vastus lateralis whole muscle cross-sectional area(CsA)(r2=0.64,Pstus lateralis absolute muscle CsA after accounting for intramuscular fat(r2=0.78,Pstiffness was also positively correlated to both isometric(r2=0.55-0.57,Psokinetic peak(r2=0.46-0.48,Psults suggest that larger clinical trial is warranted to confirm the preliminary findings that muscle stiffness is altered after sCI compared to healthy *** appeared to be influenced by infiltration of intramuscular fat and modestly by the spasticity of the paralyzed *** preliminary data indicated that the relationship between muscle stiffness and peak torque is not altered with changing the frequency of pulses or angular *** study procedures were approved by the Institutional Review Board at the

关键词： chronic spinal cord injury isometric and isokinetic torques magnetic resonance elastography muscle size rehabilitation shear modulus spasticity stiffness

Olfactory receptors in neural regeneration in the central nervous system

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Neural Regeneration Research 2025年第9期20卷 2480-2494页

作者： Rafael Franco Claudia Garrigós Toni Capó Joan serrano-Marín Rafael Rivas-santisteban Jaume Lillo Molecular Neurobiology Laboratory Department of Biochemistry and Molecular BiomedicineFacultat de BiologiaUniversitat de BarcelonaBarcelonaSpain CiberNed Network Center for Biomedical Research in Neurodegenerative Diseases Spanish National Health Institute Carlos ⅢMadridSpain school of Chemistry Universitat de BarcelonaBarcelonaSpain Department of Biochemistry and Physiology School of Pharmacy and Food SciencesUniversitat de BarcelonaBarcelonaSpain Laboratory of Computational Medicine Biostatistics UnitFaculty of MedicineAutonomous University of BarcelonaCampus BellaterraBarcelonaSpain

Olfactory receptors are crucial for detecting odors and play a vital role in our sense of smell,influencing behaviors from food choices to emotional *** receptors also contribute to our perception of flavor and have potential applications in medical diagnostics and environmental *** ability of the olfactory system to regenerate its sensory neurons provides a unique model to study neural regeneration,a phenomenon largely absent in the central nervous *** gained from how olfactory neurons continuously replace themselves and reestablish functional connections can provide strategies to promote similar regenerative processes in the central nervous system,where damage often results in permanent *** the molecular and cellular mechanisms underpinning olfactory neuron regeneration could pave the way for developing therapeutic approaches to treat spinal co rd injuries and neurodegenerative diseases like Alzheimer's *** ctory receptors are found in almost any cell of eve ry orga n/tissue of the mammalian *** ectopic expression provides insights into the chemical structures that can activate olfactory *** addition to odors,olfactory receptors in ectopic expression may respond to endogenous compounds and molecules produced by mucosal colonizing *** analysis of the function of olfactory receptors in ectopic expression provides valuable information on the signaling pathway engaged upon receptor activation and the receptor's role in proliferation and cell differentiation *** review explo res the ectopic expression of olfa ctory receptors and the role they may play in neural regeneration within the central nervous system,with particular attention to compounds that can activate these receptors to initiate regenerative *** suggests that olfactory receptors could serve as potential therapeutic targets for enhancing neural repair and recovery following central nervous syste

关键词： adenosine receptors adrenergic receptors ectopic expression G proteincoupled receptors glia neurons

A novel fractional case study of nonlinear dynamics via analytical approach

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Applied Mathematics(A Journal of Chinese Universities) 2024年第2期39卷 276-290页

作者： Hassan khan Adnan khan Rasool shah Dumitru Baleanu Department of Mathematics Abdul Wali khan UniversityMardan 23200Pakistan Department of Mathematics Faculty of Arts and SciencesCankaya UniversityAnkara 06530Turkey Institute of space sciences Magurele-BucharestRomania

The present work describes the fractional view analysis of Newell-Whitehead-segal equations,using an innovative *** work is carried with the help of the Caputo operator of fractional *** analytical solutions of some numerical examples are presented to confirm the reliability of the proposed *** derived results are very consistent with the actual solutions to the problems.A graphical representation has been done for the solution of the problems at various fractional-order ***,the solution in series form has the desired rate of convergence and provides the closed-form *** is noted that the procedure can be modified in other directions for fractional order problems.

关键词： Homotopy Perturbation method shehu transform Newell-Whitehead-segel Equation Caputo operator

Recent progress in MXenes incorporated into electrospun nanofibers for biomedical application: study focusing from 2017 to 2022

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Chinese Chemical Letters 2023年第7期34卷 38-44页

作者： Muheeb Rafiq sami-ullah Rather Taha Umair Wani Anjum Hamid Rather Rumysa saleem khan Anees Ellahi khan Ibtisam Hamid Haseeb A.khan Abdullah s.Alhomida Faheem A.sheikh Nanostructured and Biomimetic Lab Department of NanotechnologyUniversity of Kashmir Hazratbal.Jammu and KashmirSrinagar 190006India Department of Chemical and Materials Engineering King Abdulaziz University.Jeddah 21589Saudi Arabia Research Chair for Biomedical Applications of Nanomaterials Department of BiochemistryCollege of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia

After discovering a new class of two-dimensional(2D) material, i.e., MXene, a further new scope, came into existence for researchers. Due to their remarkable physical, chemical, and biological properties, MXenes find their role in almost every research discipline. They have been used in biosensors, bioimaging,tissue engineering, drug delivery systems, and other areas. The MXenes can be functionalized with a wide range of atoms/molecules, making them diverse materials. Therefore, the potential of using MXenes in nanofibers can be much more than expected. In this review, we will understand the structure, synthesis,and general properties of MXenes. We will explain using MXenes while encasing them into nanofibers,providing their specific properties. For instance, MXenes-incorporated nanofibers are used in biomedical applications, including soft and hard-tissue engineering and delivery of antimicrobials. Furthermore, MXenes, when incorporated into nanofibers, are used in promoting cellular differentiation, wound healing,and neural tissue restoration, which are briefly discussed in this communication.

关键词： MXenes Nanofibers Tissue engineering Antimicrobial Electrospinning

some new generalized difference sequence spaces defined by a sequence of moduli

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Applied Mathematics(A Journal of Chinese Universities) 2011年第1期26卷 104-108页

作者： Vakeel A khan Department of Mathematics A. M. U. Aligarh-202002 India

The idea of difference sequence sets X（△） = {x = （xk）： △x ∈ X} with X = l∞, c and co was introduced by Kizmaz [12]. In this paper, using a sequence of moduli we define some generalized difference sequence sp... 详细信息

关键词： Difference sequence space sequence of moduli inclusion relation.