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Nanofluid Flows Within Porous Enclosures Using Non-Linear Boussinesq Approximation

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Computers, Materials & Continua 2021年第3期66卷 3195-3213页

作者： Sameh E.Ahmed dalal alrowaili Ehab Mahmoud Mohamed Abdelraheem M.Aly Department of Mathematics College of ScienceKing Khalid UniversityAbha62529Saudi Arabia Department of Mathematics South Valley UniversityQena83523Egypt Mathematics Department College of ScienceJouf UniversitySakakaSaudi Arabia Electrical Engineering Department College of EngineeringPrince Sattam Bin Abdulaziz UniversityWadi Addwasir11991Saudi Arabia Electrical Engineering Department Aswan UniversityAswan81542Egypt

In this paper,the Galerkin finite element method(FEM)together with the characteristic-based split(CBS)scheme are applied to study the case of the non-linear Boussinesq approximation within sinusoidal heating inclined enclosures filled with a non-Darcy porous media and *** enclosure has an inclination angle and its side-walls have varying sinusoidal temperature *** working fluid is a nanofluid that is consisting of water as a based nanofluid and Al2O3 as *** porous medium is modeled using the Brinkman Forchheimer extended Darcy *** obtained results are analyzed over wide ranges of the non-linear Boussinesq parameter 0≤ζ≤1,the phase deviation 00≤Φ≤1800,the inclination angle 00≤γ≤900,the nanoparticles volume fraction 0%≤φ≤4%,the amplitude ratio 0≤a≤1 and the Rayleigh number 104≤Ra≤*** results revealed that the average Nusselt number is enhanced by 0.73%,26.46%and 35.42%at Ra=104,105 and 106,respectively,when the non-linearBoussinesq parameter is varied from 0 to *** addition,rate of heat transfer in the case of a non-uniformly heating is higher than that of a uniformly ***-linear Boussinesq parameter rises the flow speed and heat transfer in an *** deviation makes clear changes on the isotherms and heat transfer rate on the right wall of an *** inclination angle varies the flow speed and it has a slight effect on heat transfer in an enclosure.

关键词： CBS scheme non-linear Boussinesq approximation nonuniformly heating non-darcy flow nanofluid

Design of Computer Methods for the Solution of Cervical Cancer Epidemic Model

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Computers, Materials & Continua 2022年第1期70卷 1649-1666页

作者： Ali Raza Muhammad Rafiq dalal alrowaili Nauman Ahmed Ilyas Khan Kottakkaran Sooppy Nisar Muhammad Mohsin Department of Mathematics National College of Business Administration and Economics LahorePakistan Department of Mathematics Faculty of SciencesUniversity of Central PunjabLahore54500Pakistan Mathematics Department College of ScienceJouf UniversityP.O.Box:2014SakakaSaudi Arabia Department of Mathematics and Statistics The University of LahoreLahorePakistan Department of Mathematics College of Science Al-ZulfiMajmaah UniversityAl-Majmaah11952Saudi Arabia Department of Mathematics College of Arts and Science at Wadi AldawaserPrince Sattam bin Abdulaziz UniversityAlkharj11991Kingdom of Saudi Arabia Department of Mathematics Technische Universitat ChemnitzGermany

Nonlinear modelling has a significant role in different disciplines of sciences such as behavioral,social,physical and biological *** structural properties are also needed for such types of disciplines,as dynamical consistency,positivity and boundedness are the major requirements of the models in these *** more thing,this type of nonlinear model has no explicit *** the sake of comparison its computation will be done by using different computational ***,the aforementioned structural properties have not been restored in the existing computational techniques in ***,the construction of structural preserving computational techniques are *** nonlinearmodel for cervical cancer is constructed by parametric perturbation ***-known computer methods are considered for the computation of cervical cancer *** well-known existing methods in literature are Euler Maruyama,Euler and Runge *** finite difference method or Implicitly driven explicit method is first time considered for aforesaid model under the assumptions given byMickens in a stochastic ***,the aforementioned existing methods did not reinstate structural properties of cervical cancer dynamics in the human *** plannedmethod is structural preserving and a powerful tool for all nonlinear models of biomedical engineering *** have verified that existing computational methods do not preserve dynamical ***,the implicitly driven explicit method is a good device for dynamical *** the support of assertions,convergence analysis of implicitly driven explicit method is presented.

关键词： Cervical cancer model differential equations computer methods convergence analysis

BHGSO:Binary Hunger Games Search Optimization Algorithm for Feature Selection Problem

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Computers, Materials & Continua 2022年第1期70卷 557-579页

作者： R.Manjula Devi M.Premkumar Pradeep Jangir B.Santhosh Kumar dalal alrowaili Kottakkaran Sooppy Nisar Department of Computer Science and Engineering Kongu Engineering CollegePerundurai638060Tamil NaduIndia Department of Electrical and Electronics Engineering Dayananda Sagar College of EngineeringBengaluru560078KarnatakaIndia Rajasthan Rajya Vidyut Prasaran Nigam Sikar332025RajasthanIndia Department of Computer Science and Engineering Guru Nanak Institute of TechnologyHyderabad501506TelanganaIndia Mathematics Department College of ScienceJouf UniversitySakakaP.O.Box:2014Saudi Arabia Department of Mathematics College of Arts and SciencesPrince Sattam bin Abdulaziz UniversityWadi Aldawaser11991Saudi Arabia

In machine learning and data mining,feature selection(FS)is a traditional and complicated optimization *** the run time increases exponentially,FS is treated as an NP-hard *** researcher’s effort to build a new FS solution was inspired by the ongoing need for an efficient FS framework and the success rates of swarming outcomes in different optimization *** paper presents two binary variants of a Hunger Games Search Optimization(HGSO)algorithm based on V-and S-shaped transfer functions within a wrapper FS model for choosing the best features from a large *** proposed technique transforms the continuous HGSO into a binary variant using V-and S-shaped transfer functions(BHGSO-V and BHGSO-S).To validate the accuracy,16 famous UCI datasets are considered and compared with different state-of-the-art metaheuristic binary *** findings demonstrate that BHGSO-V achieves better performance in terms of the selected number of features,classification accuracy,run time,and fitness values than other state-of-the-art *** results demonstrate that the BHGSO-V algorithm can reduce dimensionality and choose the most helpful features for classification *** proposed BHGSO-V achieves 95%average classification accuracy for most of the datasets,and run time is less than 5 *** low and medium dimensional datasets and less than 10 sec for high dimensional datasets.

关键词： Binary optimization feature selection machine learning hunger games search optimization

Implementation and Evaluation of Dynamically Weighted Low Complexity Fair Queuing(DWLC-FQ) Algorithm for Packet Scheduling in WiMAX Networks

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China Communications 2016年第5期13卷 128-140页

作者： Zuber Patel Upena dalal Department of Electronics Engineering S V National Institute of Technology

Services provided by internet need guaranteed network performance. Efficient packet queuing and scheduling schemes play key role in achieving this. Internet engineering task force(IETF) has proposed Differentiated Services(Diff Serv) architecture for IP network which is based on classifying packets in to different service classes and scheduling them. Scheduling schemes of today's wireless broadband networks work on service differentiation. In this paper, we present a novel packet queue scheduling algorithm called dynamically weighted low complexity fair queuing(DWLC-FQ) which is an improvement over weighted fair queuing(WFQ) and worstcase fair weighted fair queuing+(WF2Q+). The proposed algorithm incorporates dynamic weight adjustment mechanism to cope with dynamics of data traffic such as burst and overload. It also reduces complexity associated with virtual time update and hence makes it suitable for high speed networks. Simulation results of proposed packet scheduling scheme demonstrate improvement in delay and drop rate performance for constant bit rate and video applications with very little or negligible impact on fairness.

关键词： fair queuing packet scheduling QoS virtual time WF2Q+ WFQ

Co-seismic surface displacement of the June 21, 2022 M_(W)6 Khōst,Afghanistan earthquake from InSAR observations

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Geodesy and Geodynamics 2024年第3期15卷 201-208页

作者： Prohelika dalal Batakrushna Senapati Bhaskar Kundu Department of Earth and Atmospheric Sciences National Institute of TechnologyRourkelaOdisha 769008India

A robust estimation of the earthquake location, seismic moment, and fault geometry is essential for objective seismic hazard assessment. Seismic events in a remote location, specifically in the absence of seismic and GNSS networks, can be investigated effectively using the In SAR-based technique. This study adopts the Differential Interferometric SAR(DIn SAR) technique to quantify the co-seismic surface displacement caused by the June 21, 2022, Khōst M_(W)6 earthquake that occurred along the western plate boundary between the Indian and Eurasian plate. The interferograms show that the maximum surface deformation occurred on the northwest and southwest of the fault line. From coherence, the Line of Sight(LOS) displacement, and the co-seismic surface displacement analysis, it has been observed that surface deformation was most pronounced in the southwest region of the fault line, and the surface has moved to the opposite direction along the fault line, which indicates a sinistral slightly oblique strike-slip movement. This In SAR-based observation appears consistent with the seismic waveforms derived from co-seismic surface displacements. Further, it has been argued that the slip deficit accumulated during the period of the last about 48 years along the frontal region of the northward extension of the Suleiman range and associated fault zone is qualitatively estimated at about 1.5 m, which is consistent with the seismic waveforms derived finite slip model.

关键词： Seismic hazard Khōst earthquake DInSAR Slip deficit LOS displacement Finite slip model

Non-static plane symmetric perfect fluid solutions and Killing symmetries in f(R,T)gravity

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Communications in Theoretical Physics 2024年第2期76卷 145-150页

作者： Preeti dalal Karanjeet Singh Sachin Kumar Department of Mathematics and Statistics Central University of PunjabBathinda151401PunjabIndia Department of Mathematics Jaypee University of Information TechnologySolan173234Himachal PradeshIndia

In this paper,the non-static solutions for perfect fluid distribution with plane symmetry in f(R,T)gravitational theory are ***,using the Lie symmetries,symmetry reductions are performed for considered vector fields to reduce the number of independent ***,corresponding to each reduction,exact solutions are *** vectors lead to different conserved ***,we figure out the Killing vector fields corresponding to all derived *** derived solutions are further studied and it is observed that all of the obtained spacetimes,at least admit to the minimal symmetry group which consists of δ_(y),δ_(z) and -zδ_(y)+yδ_(z).The obtained metrics,admit to 3,4,6,and 10,Killing vector *** of linear momentum in the direction of y and z,and angular momentum along the x axis is provided by all derived solutions.

关键词： Einstein field equations perfect fluid solutions f(R T)gravity killing symmetries

Mitigation of the impacts of electric vehicle charging on energy-star ratings for residential buildings in India

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Clean Energy 2023年第5期7卷 981-993页

作者： Rakesh dalal Devender Kumar Saini Electrical Cluster School of EngineeringUniversity of Petroleum and Energy Studies(UPES)DehradunIndia

The star-labelling programme for residential buildings was introduced by India in 2020 and applies to all residential buildings with no lower limit on the built-up area or electrical *** energy-star label for a residential building is awarded against the notified standard by the regulatory body and electric vehicles(EVs)have not been accommodated as a load for residential *** en-ergy consumption of an existing residential building is taken from a study already carried out and compared with the requirement of the Indian residential star-labelling programme with an EV as a plugged-in *** annual energy gap of 6060 kWh for the existing residential buildings considered in this study for five-star building energy labels increases to 7784 kWh if the EV load is added to the building *** residential building will lose two energy stars if it caters to the EV load and,to bridge this energy gap,the replace-ment of existing electrical appliances with five-star-rated energy appliances,employing grid-connected rooftop solar photovoltaics(PV)and retrofit of the building envelope are *** techno-economic potential of rooftop solar PV and building envelope retrofitting for existing residential buildings is explored using RETScreen®and eQUEST software,*** study establishes that the installation of rooftop solar PV can accommodate the additional load of EVs and can bridge half and three-quarters of the energy gap to achieve five energy stars for an existing building with and without EVs,*** is the most economical option among the options explored in this *** target Energy Performance Index is achievable by high-end energy consumers(12000 kWh/year)by additional measures,the replacement of inefficient electrical appliances and building envelope retrofitting in addition to the installation of rooftop solar PV.

关键词： energy conservation building code energy-star building envelope retrofit EV load

Treatment modalities in Duane’s Retraction Syndrome

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International Journal of Ophthalmology(English edition) 2020年第2期13卷 278-283页

作者： Karim A Gaballah dalal Shawky Department of Ophthalmology Helwan UniversityCairo 11731Egypt Department of Ophthalmology Alexandria UniversityAlexandria 21568Egypt

●AIM:To study the different treatment modalities needed in cases of Duane’s Retraction Syndrome(DRS).●METHODS:This prospective study undergone in more than four years,in Alexandria,included 238 patients of DRS,including type I,162 patients(68%),type II 12 patients(5%)and type III 64 patients(27%).Surgery was indicated in 98(41%)of them,to eliminate abnormal head posture,deviation of the eye in primary position,severe retraction of the globe or cosmetically unacceptable upshoot with attempted adduction.●RESULTS:Type I was the most common and type II was the *** were predominant in this study,constituting 125 patients(52.5%),and males 113 patients(47.5%).Left eye was more affected,in 110 patients(46.2%),right eye in 91 patients(38.2%)and bilateral in 37 patients(15.6%).Amblyopia was found in 27 patients(11.3%)and treated in 13 patients under 10 years of age,by patching the normal ***-eight patients(41%)were operated,the results were most satisfactory and a nomogram is followed in the surgical plan.●CONCLUSION:The surgical management is needed in less than half of the cases and should be planned for every case individually according to the clinical findings,planned nomogram and modified intraoperatively according to the anatomical findings during surgery.

关键词： Duane’s Retraction Syndrome globe retraction globe upshoot medial rectus lateral rectus forced duction test

Bridging the energy gap of India’s residential buildings by using rooftop solar PV systems for higher energy stars

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Clean Energy 2021年第3期5卷 423-432页

作者： Rakesh dalal Kamal Bansal Sapan Thapar Department of Energy University of Petroleum and Energy StudiesDehradunIndia Department of Energy and Environment TERI UniversityIndia

The residential-building sector in India consumes>25%of the total electricity and is the third-largest consumer of electricity;consumption increased by 26%between 2014 and *** has introduced a star-labelling programme for residential buildings that is applicable for all single-and multiple-dwelling units in the country for residential *** Energy Performance Index(EPI)of a building(annual energy consumption in kilowatt-hours per square metre of the building)is taken as an indicator for awarding the star label for residential *** gauging the EPI status of existing buildings,the electricity consumption of residential buildings(in kWh/m2/year)is established through a case study of the residential *** years of electricity bills are collected for an Indian residential society located in Palam,Delhi,analysed and benchmarked with the Indian residential star-labelling programme.A wide EPI gap is observed for existing buildings for five-star energy *** on existing electricity tariffs,the energy consumption of residential consumers and the Bureau of Energy Efficiency(BEE)’s proposed building ENERGY STAR labelling,a grid-integrated rooftop solar photovoltaic(PV)system is considered for achieving a higher star *** research study establishes the potential of grid-connected rooftop solar PV systems for residential buildings in Indian cities through a case study of ***-economic analysis of a grid-integrated 3-kWp rooftop solar PV plant is analysed by using RETScreen *** study establishes that an additional two stars can be achieved by existing buildings by using a grid-integrated rooftop solar PV *** for retrofit of a 3-kWp rooftop solar PV plant for Indian cites varies from 3 to 7 years.

关键词： ECBC residential star building rooftop solar PV RETScreen