检索结果-南通市图书馆

Journal of modern Power Systems and Clean Energy 2022年第5期10卷 1337-1348页

作者： Haiam Shahin mostafa F.Shaaban mahmoud H.Ismail hebat-allah m.mourad Ahmed Khattab Department of Electronics and Communications Engineering Facultyof EngineeringCairo UniversityGiza 12613Egypt IEEE Department of Electrical Engineering American University of SharjahPOBox 26666SharjahThe United Arab Emirates

The use of unmanned aerial vehicles(UAVs) in the collection of data from wireless devices, sensor nodes, and the Internet of Things(IoT) devices has recently received significant attention. In this paper, we investigate the data collection process from a set of smart meters in advanced metering infrastructure(AmI) enabled by UAVs. The objective is to minimize the total annual cost of the electric utility by jointly optimizing the number of UAVs, their power source sizing, the charging locations as well as the data collection trip planning. This is achieved while considering the energy budgets of batteries of UAVs and the required amount of collected data. The problem is formulated as a mixed-integer nonlinear programming(mINLP), which is decoupled into two sub-problems where a candidate UAV and a number of buildings are first grouped into trips via genetic algorithms(GAs), and then the optimum trip path is found using a traveling salesman problem(TSP) branch and bound algorithm. Simulation results show that the battery capacity or the number of UAVs increases as the coverage area or the density increases.

关键词： Advanced metering infrastructure unmanned aerial vehicle power source sizing trip planning genetic algorithm

Development of magnetite/Graphene Oxide Hydrogels from Agricultural Wastes for Water Treatment

在线全文

学校读者我要写书评

暂无评论

Journal of Renewable materials 2022年第7期10卷 1889-1909页

作者： hebat-allah STohamy mohamed El-Sakhawy Samir Kamel Cellulose and Paper Department National Research CentreCairo12622Egypt

A novel magnetic hydrogel loaded with graphene oxide(GO)was developed in this ***,GO was prepared from bagasse through a single step via oxidation in the presence of ferrocene under muffled atmospheric conditions,followed by the loading of different amounts of magnetite onto GO via co-precipitation reaction of iron onto GO ***,the 2-acrylamido-2-methyl-1-propane sulfonic acid was grafted onto carboxymethyl cellulose in the presence of magnetite GO and N,N′-methylenebisacrylamide as crosslinker yielded *** structure,morphological,and thermal behavior of the prepared hydrogels were *** addition,the adsorption performance of Ni(Ⅱ)ions from aqueous media by the prepared hydrogels was investigated as a function of temperature,time,and concentration of adsorbate in a batch *** results demonstrated a remarkable enhancement in the adsorption process of Ni(Ⅱ)(Removal efficiency=98.82%).All isotherms were found to fit the Langmuir model *** adsorption properties of both magnetic GO and magnetic hydrogel showed promising properties as green and cheap adsorbents.

关键词： magnetite graphene oxide hydrogel Ni(Ⅱ)adsorption kinetic models thermodynamics

Locomotion-based Hybrid Salp Swarm Algorithm for Parameter Estimation of Fuzzy Representation-based Photovoltaic modules

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of modern Power Systems and Clean Energy 2021年第2期9卷 384-394页

作者： Rizk m.Rizk-allah Aboul Ella Hassanien the Faculty of Engineering Menoufia UniversityShebin El-KomEgypt Scientific Research Group in Egypt CarioEgypt the Faculty of Computers and Artificial Intelligence Cairo UniversityCairoEgypt

Identifying the parameters of photovoltaic(PV)modules is significant for their design and *** of the instabilities in the weather action and land surface of the earth,which cause errors in measuring,a novel fuzzy representation-based PV module is formulated and *** this paper,a novel locomotion-based hybrid salp swarm algorithm(LHSSA)is presented to identify the parameters of PV modules accurately and *** the LHSSA,better leader salps based on particle swarm optimization(PSO)are incorporated to the traditional salp swarm algorithm(SSA)in a serialized scheme with the aim of providing more valuable information for the leader salps of the *** this integration,the proposed LHSSA can escape the local optima as well as guide the seeking process to attain the promising *** proposed LHSSA is investigated on different PV models,i.e.,single-diode(SD),double-diode(DD),and PV module in crisp and fuzzy *** comparing with different algorithms,the comprehensive results affirm that the LHSSA can achieve a highly competitive performance,especially on quality and reliability.

关键词： Salp swarm algorithm(SSA) particle swarm optimization(PSO) photovoltaic(PV)model hybridization

Exact solutions of stochastic fractional Korteweg de–Vries equation with conformable derivatives

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第3期29卷 62-69页

作者： Hossam A.Ghany Abd-allah Hyder m Zakarya King Khalid University College of ScienceDepartment of MathematicsP.O.Box 900461413AbhaSaudi Arabia Department of Engineering mathematics and Physics Faculty of EngineeringAl-Azhar University11371CairoEgypt Department of mathematics Helwan UniversitySawah Street(11282)CairoEgypt Department of mathematics Faculty of ScienceAl-Azhar University71524AssiutEgypt

We deal with the Wick-type stochastic fractional Korteweg de–Vries(KdV) equation with conformable *** the aid of the Exp-function method, white noise theory, and Hermite transform, we produce a novel set of exact soliton and periodic wave solutions to the fractional KdV equation with conformable derivatives. With the help of inverse Hermite transform, we get stochastic soliton and periodic wave solutions of the Wick-type stochastic fractional KdV equation with conformable derivatives. Eventually, by an application example, we show how the stochastic solutions can be given as Brownian motion functional solutions.

关键词： Korteweg de–Vries(KdV)equation conformable derivative stochastic Brownian motion Expfunction method

Fractional Optimal Control of Navier-Stokes Equations

在线全文

学校读者我要写书评

暂无评论

Computers, materials & Continua 2020年第8期64卷 859-870页

作者： Abd-allah Hyder m.El-Badawy King Khalid University College of ScienceDepartment of MathematicsP.O.Box 900461413AbhaSaudi Arabia Department of Engineering mathematics and Physics Faculty of EngineeringAl-Azhar UniversityCairo11371Egypt mathematics Department Al-Azhar UniversityCairoEgypt

In this paper,the non-stationary incompressible fluid flows governed by the Navier-Stokes equations are studied in a bounded *** study focuses on the time-fractional Navier-Stokes equations in the optimal control subject,where the control is distributed within the domain and the time-fractional derivative is proposed as Riemann-Liouville *** addition,the control object is to minimize the quadratic cost *** using the Lax-milgram lemma with the assistance of the fixed-point theorem,we demonstrate the existence and uniqueness of the weak solution to this ***,for a quadratic cost functional subject to the time-fractional Navier-Stokes equations,we prove the existence and uniqueness of optimal ***,via the variational inequality upon introducing the adjoint linearized system,some inequalities and identities are given to guarantee the first-order necessary optimality conditions.A direct consequence of the results obtained here is that when a→1,the obtained results are valid for the classical optimal control of systems governed by the Navier-Stokes equations.

关键词： Optimal control lax-milgram lemma fixed point theorem navier-stokes equations

multiple Primary malignancies: metastatic Renal with Early Breast and Endometrial Cancers: A Case Report

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Cancer Therapy 2018年第11期9卷 907-913页

作者： Amal Rayan Abbas Ahmed m. Ashraf hebat allah m. Bakri Clinical Oncology Department Faculty of Medicine Assiut University Assiut Egypt

Double primary malignancies could be divided into two categories, depending on the interval between tumor diagnoses. A secondary malignancy could be defined as a new cancer that has occurred as a result of previous treatment with radiation or chemotherapy. Second primary malignancy can occur at any age but it’s commonly at old age. A 46 premenopausal female patient presented to our outpatient clinic complaining from a mass in her right breast, routine metastatic work-up for distant metastasis declared multiple hepatic metastases, RT renal mass, and bone metastases. Palliative radiotherapy to tender and weight bearing sites followed by 4 cycles of systemic chemotherapy FEC regimen were received. Tru-cut needle biopsy from renal mass detected renal cell carcinoma of clear cell type, the patient started sunitinib and tamoxifen with bisphosphonate (Zoledronic acid), assessment of the response revealed reduction of the size and number of HFLs, and the size of renal mass, so the patient was decided to do cytoreductive nephrectomy and then continued on TAm and sunitinib. Collectively, due to the rising incidence of multiple primary malignancies, further studies should be done not only for better clinical evaluation and treatments but also for accurate determination of possible causes, pathogenesis, effective managements and screening programs.

关键词： Renal Cell Carcinoma Breast Cancer PET/CT Double malignancies

Physical aspects of anisotropic compact stars in f(T,T) gravity with off diagonal tetrad

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics C 2021年第8期45卷 190-205页

作者： m.Zubair allah Ditta G.Abbas Rabia Saleem Department of mathematics COMSATS University IslamabadLahore CampusLahorePakistan Department of mathematics The Islamia University of BahawalpurBahawalpurPakistan

This study addresses the formation of anisotropic compact star models in the background of f(T,T)gravity(where T and T represent the torsion and trace of the energy momentum tensor,respectively).f(T,T)gravity is an extension of the f(T)theory,and it allows a general non-minimal coupling between T and *** this setup,we apply Krori and Barua's solution to the static spacetime with the components ξ=Br^(2)+c and ψ=Ar^(2).To develop viable solutions,we select a well-known model f(T,T)=αT^(m)+βT+Ф(where α and β are coupling parameters,and Ф indicates the cosmological constant).We adopt the conventional matching of interior and exterior space time to evaluate the unknowns,which are employed in the stellar *** present a comprehensive discussion on the stellar properties to elaborate the anisotropic nature of compact stars corresponding to well-known models:PSRJ1416-2230,4U1608-52,CenX-3,EXO1785-248,and *** physical analysis,it is observed that the solution of compact spheres satisfy the acceptability criteria,and its models behave optimally and depict stability and consistency,in accordance with f(T,T)gravity.

关键词： f(T,T)gravity compact stars stellar models

Expression levels ofβcatenin and galectin-3 in meningioma and their effect on brain invasion and recurrence:a tissue microarray study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cancer Biology & medicine 2017年第3期14卷 319-326页

作者： Rehab allah Ahmed Abdelhadi m Shebl Hany Onsy Habashy Department of Pathology Mansoura UniversityFaculty of MedicineMansoura DK 35516Egypt

Objective:meningiomas are neoplasms that arise from the meninges of the central nervous system(CNS).They constitute about25.6%of CNS tumors diagnosed in *** morphological variants of meningiomas display aggressive behavior,leading to brain-invasive growth *** meningiomas are usually treated by complete surgical excision,the risk of postoperative recurrence ***,additional biomarkers for predicting aggressive behavior must be *** study aims to explore the clinical and biological relevance of the protein expression levels ofβ-catenin and galectine-3 in meningioma and to understand the pathobiology of this ***:This retrospective study was carried out on 153 cases of meningioma by using tissue microarrays and immunohistochemistry forβ-catenin and ***:Highβ-catenin expression was significantly associated with transitional and meningiotheliomatous meningiomas,low tumor grade,low recurrence rate,and low incidence of brain ***,high galectin-3 expression was associated with brain invasion,recurrence,high tumor grade,and tumor *** regression analysis indicated that among all variables included in the model,β-catenin and galactin-3 expression levels were significant predictors of tumor recurrence(Pmeningioma recurrence but not in brain *** molecules could be important potential therapeutic targets and predictors for meningiomas.

关键词： Immunohistochemistry meningioma recurrence brain invasion galectin-3 and β-catenin

Investigating tight oil reservoir production performance:Influence of geomechanical parameters and their distribution

在线全文

学校读者我要写书评

暂无评论

Petroleum Research 2023年第4期8卷 490-498页

作者： Sameera m.Hamd-allah Nagham Jasim Al-Ameri Petroleum Engineering Department College of EngineeringUniversity of BaghdadIraq

Geomechanical properties have a prominent influence on reservoir stresses,which consequently reduce permeability and porosity with pressure *** properties significantly affect the accuracy of reservoir modeling and recovery calculation,but have not been fully studied;therefore,more work is *** field data and laboratory measurements are included in the *** work involves deriving an equation by combining experimental data for permeability and porosity reduction during a change in stress with the poroelastic stress equation to investigate the impact of Poisson's ratio and Young's modulus on the reduction of permeability and porosity with pressure *** simulation studies assume constant geomechanical properties across the entire reservoir or for each individual reservoir *** this study,three approaches were considered for the Poisson's ratio and Young's modulus in the reservoir model:1)constant average values assigned to the entire reservoir,2)constant average values assigned to each layer,and 3)constant values assigned to each grid *** validity of the model results was checked by history matching with production and pressure *** the studied tight reservoir,the Poisson's ratio and Young's modulus significantly affected the permeability and porosity reduction with pressure *** impact of Young's modulus was more pronounced than Poisson's *** simulation results for oil rate,cumulative oil production,and water cut for the reservoir and a selected well showed that applying the three suggested geomechanical approaches resulted in a substantial discrepancy in the model *** general,the coupled model with the mapped geomechanical properties resulted in lower oil and water *** is attributed to the large values of mapped Young's modulus in parts of the reservoir which resulted in large permeability reduction and subsequently lower oil and water production is *** contrast lower Young's mo

关键词： Tightreservoir Simulation Geomechanicsproperties Heterogeneity Compactioneffect mechanical earth model

CeO_2掺杂的mn/Al催化剂的物化、表面及催化性能(英文)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

催化学报 2008年第8期29卷 687-695页

作者： Nasr-allah m.DERAZ Physical Chemistry Department Laboratory of Surface Chemistry and CatalysisNational Research Center

Pure and CeO2-doped mn/Al mixed oxides were prepared by the wet impregnation method using finely powdered alumina,manganese,and cerium *** physicochemical,surface,and catalytic properties of the thermally treated solids(at 500,800,and 900 ℃) were investigated using XRD,nitrogen adsorption at-196 ℃,and hydrogen peroxide decomposition in an aqueous solution at 30 -50 ℃.The mn oxidation state changed from mn4+ to mn2+ on increasing the calcination *** were two unique features associated with CeO2 that are of *** first was that it favored the dispersion of manganese oxides deposited on the γ-Al2O3 catalyst calcined at 500 ℃.The second was that it enhanced the formation of mn3O4 species from mn2O3 deposited initially on the alumina support calcined at 800 and 900 ℃.Consequently,the specific surface area of the mn/Al mixed oxides calcined at 500 ℃ was increased by increasing the amount of dopant *** opposite effect was observed by increasing the calcination temperature from 500 to 900 ℃.The doping followed by calcination at different temperatures brought about an increase in the catalytic activity of mixed *** did not modify the mechanism of the catalyzed reaction but changed the number of catalytically active sites without changing the nature of these sites.

关键词：二氧化铈物理化学性质催化性氧化铝