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Optimal Rotor Poles and Structure for Design of Consequent Pole Permanent Magnet Flux Switching Machine

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Chinese Journal of Electrical Engineering 2021年第1期7卷 118-127页

作者： Wasiq Ullah faisal Khan Muhammad Umair Department of Electrical and Computer Engineering COMSATS University Islamabad(Abbottabad Campus)Abbottabad 22040Pakistan

Permanent magnet flux switching machines(PMFSM)have attracted significant research interest and are considered as competent candidates when higher torque density is primary ***,conventional PMFSMs uses excessive rare earth PM volumes which ultimately increases machine the machine weight and PM ***,the PMs extended at the stator yoke results in stator leakage flux which degrades the *** suppress the leakage flux and diminish the PM volume,the consequent pole PMFSM(CPPMFSM)with flux bridges and barriers encompassing partitioned circumferential and radial magnetized PMs is proposed,thereby ensuring an alternate magnetic path for the working harmonics which improves the modulation effect and flux ***,the influence of the rotor pole number on seven different rotor structures namely,curved rotor,trapezoidal rotor,wide rotor tooth tip,wide rotor base width,rectangular segmented and eccentric rotors are investigated based on the electromagnetic performance and stress *** element analysis(FEA)reveals that the 12S-13P CPPMFSM with a wider rotor base offers comparatively better electromagnetic *** to the conventional PMFSM,the proposed CPPMFSM reduces the PM volume which minimizes the overall machine cost and weight,suppresses the torque ripples by 16.49%,diminishes total harmonic distortion(THD)by 35.24%and decreases cogging torque by 32.88%.Furthermore,the torque and power density are enhanced by 7.028%and 7.025%respectively.

关键词： AC Machine consequent pole flux bridge flux switching machine permanent magnet rotor pole number rotor structure stress analysis

Does financial depth impact economic growth in North Cyprus?

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Financial Innovation 2018年第1期4卷 192-204页

作者： Turgut Türsoy faisal faisal Near East University NicosiaNorth CyprusMersin 10Turkey Institute of Business studies and leadership Faculty of Business and EconomicsAbdul Wali Khan UniversityMardanKPPakistan

This study purpose is to connect the proxy of financial development which is total banking sector’s deposits with the economic growth in North *** reason for using the total deposit differently with the existing literature is because North Cyprus is bank-based financial ***,this study provides an analysis of the connection between finance-growth nexus in North Cyprus from 1978 through 2015,using the autoregressive distributed lag(ARDL)model and combined cointegration to evaluate and verify the *** addition,this research added the inflation rate to the model specification to investigate the inflation-growth *** results revealed that both methods of cointegration provided robust evidence for a long-run relationship between financial debt and *** ARDL long-run and short-run coefficients showed the positive impact of depth and the negative impact of inflation on economic growth,thereby confirming the strength of the financegrowth and inflation-growth ***,financial depth had a larger coefficient than the inflation ***,the VECM Granger causality test provided evidence for unidirectional causality from the total deposits and inflation rate to economic growth in North *** results are significant for the policymakers of North Cyprus because the findings show that economic growth can be improved by enhancing the deposit rates in the financial system.

关键词： Financial depth Inflation rate Economic growth ARDL Granger causality

Superplastic deformation behavior of Mg alloys: A-review

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Journal of Magnesium and Alloys 2022年第1期10卷 107-121页

作者： faisal Nazeer Jianyu Long Zhe Yang Chuan Li School of Mechanical Engineering Dong guan University of TechnologyDongguan 523808China

The magnesium alloys are the next-generation lightweight metal materials;however, the production of the complex shape components of thermo-mechanical processed magnesium alloys is very limited in comparison to their die-casted counterparts. Both high strain rate and low-temperature processing are required to save time and cost for the project. Uniaxial tensile testing has been vastly used for determining the plasticity of magnesium alloys at elevated temperatures. Therefore, this review article sheds light on superplastic behaviors under the uniaxial tensile loading of different magnesium alloys. This review also emphasizes low and high-temperature superplasticity, high strain rate superplasticity, deformation mechanism, thermal stability, texture evaluation, and fracture mechanism of extruded/rolled and severe plastic deformed magnesium alloys. At the end of the review, some technical issues have been addressed which can be beneficial for further enhancement in the superplasticity of magnesium alloys.

关键词： Superplasticity LTSP HSRSP Thermal stability Texture Fracture

Laminar and Turbulent Characteristics of the Acoustic/Fluid Dynamics Interactions in a Slender Simulated Solid Rocket Motor Chamber

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Computer Modeling in Engineering & Sciences 2021年第5期127卷 437-467页

作者： Abdelkarim Hegab faisal Albatati Mohammed Algarni Department of Mechanical Engineering Faculty of Engineering at RabighKing Abdulaziz UniversityRabigh21911Saudi Arabia

In this paper,analytical,computational,and experimental studies are integrated to examine unsteady acoustic/vorticity transport phenomena in a solid rocket motor chamber with end-wall disturbance and side-wall ***-fluid dynamic interactions across the chamber may generate intense unsteady vorticity with associated shear *** stresses may cause scouring and,in turn,enhance the heat rate and erosional burning of solid propellant in a real rocket *** this modelling,the unsteady propellant gasification is mimicked by steady-state flow disturbed by end-wall *** analytical approach is formulated using an asymptotic technique to reduce the full governing *** equations that arise from the analysis possess wave properties are solved in an initial-boundary value *** numerical study is performed by solving the parabolized Navier–Stokes equations for the DNS simulation and unsteady Reynolds-averaged Navier–Stokes equations along with the energy equation using the control volume approach based on a staggered grid system with the turbulence *** v2-f turbulence model has been *** results show that an unexpectedly large amplitude of unsteady vorticity is generated at the injection side-wall of the chamber and is then penetrated downstream by the bulk motion of the internal *** stresses may cause a scouring effect and large transient heat transfer on the combustion surface.A comparison between the analytical,computational,and experimental results is performed.

关键词： Acoustic waves solid rocket motor chamber sidewall injection perturbation analysis acoustic instability turbulence models manuscript

Quantification of relationship between annual daily maximum temperature and annual daily maximum rainfall in South Australia

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Atmospheric and Oceanic Science Letters 2020年第4期13卷 286-293页

作者： YE Qianping AHAMMED faisal School of Natural and Built Environments University of South AustraliaAdelaideAustralia

The empirical relationship between annual daily maximum temperature(ADMT)and annual daily maximum rainfall(ADMR)was *** data were collected from four weather stations located in Adelaide,South Australia,from 1988 to *** to the influence of sea surface temperature on rainfall and temperature,the distance from the weather station to the sea was considered in the selection of weather *** weather stations near the sea and two inland weather stations were *** non-parametric statistical tests(Kruskal–Wallis,Mann–Whitney,and correlation)were applied to perform statistical analysis on the ADMT and ADMR *** was revealed that the temperature and rainfall in South Australia varies according to weather station *** distance from the sea to the weather station was found to have limited influence on temperature and ***,with the 0.05 level of significance,the association between ADMT and ADMR near sea stations is not as significant as the association between the two inland weather *** is relatively unrealistic to use ADMR to predict ADMT,or vice versa,since their correlation is not statistically significant(Spearman’s rank correlation coefficient:−0.106).

关键词： Annual daily maximum rainfall annual daily maximum temperature kruskal–Wallis Mann–Whitney correlation

Development of multi-physics numerical simulation model to investigate thermo-mechanical fatigue crack propagation in an autofrettaged gun barrel

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Defence Technology（防务技术） 2021年第5期17卷 1579-1591页

作者： Naveed Hussain faisal Qayyum Riffat Asim Pasha Masood Shah Department of Mechanical Engineering University of Engineering and TechnologyTaxilaPakistan Institut für Metallformung Technische Universitat BeragakademieFreibergGermany

In this research,a detailed multi-physics study has been carried out by numerically simulating a solid fractured gun barrel for 20 thermo-mechanical *** numerical model is based on thermal effects,mechanical stress fields and fatigue crack ***-plastic material data of modified AISI 4340 at temperatures ranging from 25 to 1200℃and at strain rates of 4,16,32 and 48 s^(-1) was acquired from high-temperature compression *** was used as material property data in the simulation *** boundary conditions applied are kept similar to the working gun barrel during continuous firing.A methodology has been provided to define thermo-mechanically active surface-to-surface type interface between the crack faces for a better approximation of stresses at the crack *** of results from non-autofrettaged and autofrettaged simulation models provide useful information about the evolution of strains and stresses in the barrel at different points under combined thermo-mechanical loading cycles in both *** effect of thermal fatigue under already induced compressive yield due to autofrettage and the progressive degradation of the accumulated stresses due to thermo-mechanical cyclic loads on the internal surface of the gun barrel(mimicking the continuous firing scenario)has been *** between energy release rate at tips of varying crack lengths due to cyclic thermo-mechanical loading in the non-autofrettaged and autofrettaged gun has been carried out.

关键词： Steel Autofrettage Gun barrel Crack propagation Thermo-mechanical fatigue Numerical simulation Residual stress dissipation

Peptides-based vaccine against SARS-nCoV-2 antigenic fragmented synthetic epitopes recognized by T cell and β-cell initiation of specific antibodies tofightthe infection

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Bio-Design and Manufacturing 2021年第3期4卷 490-505页

作者： Zainularifeen Abduljaleel faisal A.Al-Allaf Syed A.Aziz Department of Medical Genetics Faculty of MedicineUmm Al-Qura UniversityP.O.Box715Mecca21955Kingdom of Saudi Arabia Science and Technology Unit UmmAl-Qura UniversityP.O.Box 715Mecca21955Kingdom of SaudiArabia The Regional Laboratory Molecular Diagnostics UnitDepartment of Molecular BiologyMinistry of Health(MOH)P.O.Box 6251MeccaKingdom of SaudiArabia Department of Pathology and Lab Medicine University of Ottawa451Smyth RoadOttawaONK1H8M5Canada

The World Health Organization has declared the rapidly spreading coronavirus to be a global *** FDA is yet to approve a vaccine for human novel ***,we developed a peptide-based vaccine and used high-throughput screening by molecular dynamics simulation to identify T-cell-and p-cell-recognized epitopes for producing specific antibod-ies against *** construct~12 P'antigenic epitope peptides to develop a more effective vaccine and identify specific *** epitope peptides selectively presented the best antigen presentation scores for both human pMHC class I and II alleles to develop a strong binding *** antigens identified of SARS-nCoV-2 different proteins by each attached specific~1-7 L linker adaptor were used to construct a broad single peripheral peptide *** is expected to be highly antigenic with a minimum allergic *** a result of these exciting outcomes,expressing a vaccine using the intimated peptide was highly promising and positive to be highly proposed as epitope-based peptide vaccine of specific antibody against SARS-nCoV-2 by initiating T cells and β-*** in vitro study for the proposed peptide-based vaccine *** *** clinical trials are required to check the efficacy of this vaccine.

关键词： COVID-19 SARS-nCoV-2 Peptide-based vaccine Cell-penetrating peptides Lipid membrane Vaccine efficacy

COLONIZATION OF VIGNA RADIATA ROOTS BY CHROMIUM RESISTANT BACTERIAL STRAINS OF OCHROBACTRUM INTERMEDIUM,BACILLUS CEREUS AND BREVIBACTERIUM SP.

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应用与环境生物学报 2005年第5期11卷 528-530页

作者： MUHAMMAD faisal SHAHIDA Hasnain Department of Botany University of the Punjab Quaid-e-Azam Campus Lahore-54590PakistanDepartment of BotanyUniversity of the Punjab Quaid-e-Azam Campus Lahore-54590Pakistan

The present study deals with colonization potential of plant growth promoting bacterial strains (Ochrobactrum intermedium, Bacillus cereus and Brevibacterium sp.) on Vigna radiata roots. The roots were heavily colonized with O. intermedium and B. cereus as compared to Brevibacterium sp. O. intermedium mainly colonized rhizoplane while B. cereus occurred both on the rhizoplane and near root zone. O. intermedium and B. cereus were found to be present both on the rhizoplane and near root zone, while Brevibacterium only in the rhizosphere in the form of groups. The cells of B. cereus were found more in the sites where root exudates were existed. From the above results it was observed that the number of O. intermedium cells were large at root exudate site. Fig 2, Tab 1, Ref

关键词：豇豆辐射动物铬元素细菌感染仙人掌环境生物学

Mesoporous WO_3-graphene photocatalyst for photocatalytic degradation of Methylene Blue dye under visible light illumination

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Journal of Environmental Sciences 2018年第4期30卷 328-337页

作者： Adel A.Ismail M.faisal Adel Al-Haddad Wastewater Treatment and Reclamation Technologies (WTRT) Water Research Center Kuwait Institute for Scientific Research Advanced Materials and Nano-Research Centre Najran University

Advanced oxidation technologies are a friendly environmental approach for the remediation of industrial wastewaters. Here, one pot synthesis of mesoporous WO3 and WO3-graphene oxide（GO） nanocomposites has been performed through the sol–gel method. Then, platinum（Pt） nanoparticles were deposited onto the WO3 and WO3-GO nanocomposite through photochemical reduction to produce mesoporous Pt/WO3 and Pt/WO3-GO nanocomposites. X-ray diffraction（XRD） findings exhibit a formation of monoclinic and triclinic WO3 phases. Transmission Electron Microscope（TEM） images of Pt/WO3-GO nanocomposites exhibited that WO3 nanoparticles are obviously agglomerated and the particle sizes of Pt and WO3 are ~ 10 nm and 20–50 nm, respectively. The mesoporous Pt/WO3 and Pt/WO3-GO nanocomposites were assessed for photocatalytic degradation of Methylene Blue（MB） as a probe molecule under visible light *** findings showed that mesoporous Pt/WO3, WO3-GO and Pt/WO3-GO nanocomposites exhibited much higher photocatalytic efficiencies than the pure WO3. The photodegradation rates by mesoporous Pt/WO3-GO nanocomposites are 3, 2 and 1.15 times greater than those by mesoporous WO3, WO3-GO, and Pt/WO3, respectively. The key factors of the enhanced photocatalytic performance of Pt/WO3-GO nanocomposites could be explained by the highly freedom electron transfer through the synergetic effect between WO3 and GO sheets, in addition to the Pt nanoparticles that act as active sites for O2 reduction, which suppresses the electron hole pair recombination in the Pt/WO3-GO nanocomposites.

关键词： Mesoporous Pt/WO3 nanocomposites Graphene oxide Methylene Blue photodegradation Visible light