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The new types of wave solutions of the Burger’s equation and the Benjamin-Bona-Mahony equation

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Journal of Ocean Engineering and Science 2018年第1期3卷 1-10页

作者： md.Azmol Huda M.ali Akbar Shewli Shamim Shanta Mathematics Discipline Khulna UniversityBangladesh Department of Applied Mathematics University of RajshahiBangladesh Department of Mathematics University of RajshahiBangladesh

In this article,we suggest the two variable(G/G,1/G)-expansion method for extracting further general closed form wave solutions of two important nonlinear evolution equations(NLEEs)that model one-dimensional internal waves in deep water and the long surface gravity waves of small amplitude propagating *** method can be regarded as an extension of the(G/G)-expansion *** ansatz of this extension method to obtain the solution is based on homogeneous balance between the highest order dispersion terms and nonlinearity which is similar to the(G/G)method whereas the auxiliary linear ordinary differential equation(LODE)and polynomial solution *** applied this method to find explicit form solutions to the Burger’s and Benjamin-Bona-Mahony(BBM)equations to examine the effectiveness of the method and tested through mathematical computational software *** new exact travelling wave solutions in more general form of these two nonlinear equations are derived by this extended *** method introduced here appears to be easier and faster comparatively by means of symbolic computation system.

关键词： Travelling wave solution Soliton Burger’s equation Benjamin-Bona-Mahony equation.

Low Profile UHF Antenna Design for Low Earth-Observation CubeSats

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Computers, Materials & Continua 2022年第5期71卷 2533-2542页

作者： md.Amanath Ullah Touhidul Alam ali F.Almutairi Mohammad Tariqul Islam School of Electrical and Data Engineering Faculty of Engineering and Information TechnologyUniversity of Technology SydneyUltimo NSW2007Australia Space Science Centre(ANGKASA) Institute of Climate Change(IPI)Universiti Kebangsaan MalaysiaBangi43600SelangorMalaysia Department of CSE International Islamic University Chittagong(IIUC)Chattogram4318Bangladesh Electrical Engineering Department Kuwait University13060KuwaitCityKuwait Department of Electrical Electronic and Systems EngineeringFaculty of Engineering and Built EnvironmentUniversiti Kebangsaan MalaysiaBangi43600SelangorMalaysia

This paper reveals a new design of UHF CubeSat antenna based on a modified Planar Inverted F Antenna(PIFA)for CubeSat *** design utilizes a CubeSat face as the ground *** is a gap of 5 mm beneath the radiating element that facilitates the design providing with space for solar *** prototype is fabricated using Aluminum metal sheet and *** antenna achieved resonance at 419 *** of the antenna has been investigated after placing a solar *** properties of solar panels made the resonance shift about 20 *** design addresses the frequency shifting issue after placing the antenna with the CubeSat *** phenomenon has been analyzed considering a typical 1U and 2U CubeSat body with the *** antenna achieved a positive realized gain of 0.7 dB and approximately 78%of efficiency at the resonant frequency with providing 85%of open space for solar irradiance onto the solar panel.

关键词： CubeSat antenna UHF antenna small satellite satellite communication

A study on the compatibility of the generalized Kudryashov method to determine wave solutions

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Propulsion and Power Research 2021年第1期10卷 95-105页

作者： Hemonta Kumar Barman md.Ekramul Islam M.ali Akbar Department of Applied Mathematics University of RajshahiRajshahi6205Bangladesh Department of Mathematics Pabna University of Science and TechnologyPabna6600Bangladesh

In this article,we establish solitary wave solutions to the Estevez-MansfieldClarkson(EMC)equation and the coupled sine-Gordon equations which are model equations to analyze the formation of shapes in liquid drops,surfaces of negative constant curvature,*** contriving the generalized Kudryashov *** extracted results introduce several types’solitary waves,such as the kink soliton,bell-shape soliton,compacton,singular soliton,peakon and other sort of soliton for distinct valuation of the unknown *** achieved analytic solutions are interpreted in details and their 2D and 3D graphs are *** obtained solutions and the physical structures explain the soliton phenomenon and reproduce the dynamic properties of the front of the travelling wave deformation generated in the dispersive *** shows that the generalized Kudryashov method is powerful,compatible and might be used in further works to found novel solutions for other types of nonlinear evolution equations ascending in physical science and engineering.

关键词： The nonlinear evolution equations(NLEEs) The Estevez-MansfieldClarkson(EMC)equation The coupled sineGordon equations The generalized Kudryashov method Solitons Analytic solutions

Abundant general solitary wave solutions to the family of KdV type equations

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Journal of Ocean Engineering and Science 2017年第1期2卷 47-54页

作者： md.Azmol Huda M.ali Akbar Shewli Shamim Shanta Mathematics Discipline Khulna UniversityKhulnaBangladesh Department of Applied Mathematics University of RajshahiRajshahiBangladesh Department of Mathematics University of RajshahiRajshahiBangladesh

This work explores the construction of more general exact traveling wave solutions of some nonlinear evolution equations(NLEEs)through the application of the(G/G,1/G)-expansion *** method is allied to the widely used(G/G)-method initiated by Wang et *** can be considered as an extension of the(G/G)-expansion *** effectiveness,the method is applied to the family of KdV type *** general form solitary wave solutions as well as periodic solutions are successfully obtained through this ***,in the obtained wider set of solutions,if we set special values of the parameters,some previously known solutions are *** approach of this method is simple and elegantly *** been computerized it is also powerful,reliable and effective.

关键词： Nonlinear evolution equation Solitary wave solution Potential KdV equation Complex modified KdV equation

Integration of 1D and 3D modeling schemes to establish the Farewell Formation as a self-sourced reservoir in Kupe Field,Taranaki Basin, New Zealand

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Frontiers of Earth Science 2021年第3期15卷 631-648页

作者： S.M.Talha QADRI md Aminul ISLAM Mohamad Ragab SHALABY Syed Haroon ali Department of Earth Sciences University of Toronto Geosciences Program Faculty of Science Universiti Brunei Darussalam Geology Department Faculty of Science Tanta University Department of Earth Sciences University of Sargodha

Along with conventional methods, this paper proposed a method in which 1 D and 3 D models are integrated to identify the self-sourced reservoir potential of the Farewell Formation in the Kupe Gas Field within the Taranaki Basin, New Zealand. Source rock characteristics were evaluated at both field and basin scales by investigating source rock maturity, type of organic matter,and hydrocarbon generation potential by rock pyrolysis,using Rock-Eval 2 and 6. The 1 D thermal and burial history model established the rate of sedimentation and thermal history of the Kupe 4 well. Reservoir characterization at field-scale was determined by seismic interpretation, well log analysis, and 3 D structural and petrophysical models. The sediments of the Farewell Formation contain types II-III（oil/gas prone） and type III（gas prone） and have fair-to-excellent generation potential. The oxygen and hydrogen indices ranged from 3 to 476 mg CO2/g TOC and 26 to 356 mg HC/g TOC, respectively, whereas the thermal maturity determined by vitrinite reflectance values ranged between 0.3% and 0.72%, indicating that the Farewell Formation is in immature-to-mature hydrocarbon generation stage. Thus, Farewell Formation was verified to be a good source rock. Additionally, structural interpretations demonstrated the structural complexity of an extensional and contractional regime within the reservoir package. Multiple faults indicated a good reservoir property there with a trapping mechanism as well as migration paths. A well-log-based petrophysical analysis established the presence of up to 70% hydrocarbon saturation within the pore spaces of Farewell *** 3 D models confirmed that the Farewell Formation has significant sand zones and hydrocarbon-saturated zones,thereby proving its very good reservoir characteristics. It has been proved that the 1 D and 3 D structural schemes,integrated with geological techniques, was vital in identifying the Kupe Field as a self-sourced reservoir.

关键词： self-sourced reservoir Kupe Field Farewell Formation Taranaki Basin

Comparative phytochemical,thin layer chromatographic profiling and antioxidant activity of extracts from some Indian herbal drugs

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Journal of Bioresources and Bioproducts 2022年第2期7卷 46-52页

作者： md Sohail Akhtar Mohamed Rafiullah Wegdan Aly Shehata Amzad Hossain Mohammed ali School of Pharmacy College of Pharmacy and NursingUniversity of NizwaNizwaOman Phytochemistry Research Laboratory Department of Pharmacognosy and PhytochemistryFaculty of PharmacyJamia HamdardNew DelhiIndia Strategic Center for Diabetes Research College of MedicineKing Saud UniversityRiyadhSaudi Arabia

Natural antioxidants play a significant role to prevent cell breaking and regenerate *** plants native to India named dwarf morning-glory(Evolvulus alsinoides),Indian banyan(Ficus bengalensis)and chicory(Chicorium intybus)are used as medicine in India traditionally to treat *** aim of this study is to evaluate and compare the antioxidant activity as well as to compare phytochemical profiles of the aqueous extracts of the selected three *** dried plant powder was extracted with ethanol individually by using the Soxhlet method for eight hours and the solvent was evaporated under reduced ***,the air-dried powder was ex-tracted with water,and the water was *** thin layer chromatography(TLC)profile of the extracts was determined by using TLC densitometer and the antioxidant activity was deter-mined by the conventional 2,2-diphenyl-1-picrylhydrazyl(DPPH)*** TLC profile shows that there are no similarities of retention factor(R f)values among the plant extracts which means all three plants contain different chemical *** antioxidant activities of the aqueous extracts at different concentrations show different antioxidant *** inhibition is dose dependent,as doses are increasing then percentage inhibition is also increasing for all three plant *** the selected plants,the highest activity was found in *** and the lowest was in *** order of the antioxidant activity among the selected plants was ***<***<*** on the TLC profile and antioxidant activities,the highest activity of the selected plant species was evaluated.

关键词： Indian drug Thin layer chromatography(TLC)profile Plant extract Antioxidant activity

Eff ect of polystyrene microplastics and temperature on growth,intestinal histology and immune responses of brine shrimp Artemia franciscana

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Journal of Oceanology and Limnology 2021年第3期39卷 979-988页

作者： Xuekai HAN Yuyu ZHENG Chaoling DAI Hu DUAN Meirong GAO md Rayhan ali Liying SUI Asian Regional Artemia Reference Center Tianjin Key Laboratory of Marine Resources and ChemistryCollege of Marine and Environmental SciencesTianjin University of Science and TechnologyTianjin 300457China

Microplastics pollution and seawater temperature rise have been the major environmental issues,threatening the survival and biodiversity of marine *** study evaluated the combined effect of temperature and polystyrene microplastics(MP)on Artemia,a filter-feeding crustacean that is widely used for environmental toxicology *** shrimp Artemia franciscana were exposed to three MP concentrations(0,0.2,and 2.0 mg/L)and three temperatures(22,26,and 30℃)for 14 *** general,higher MP concentration and temperature led to a decreased survival rate and ***-way ANOVA analysis indicated that the survival rate of Artemia was significantly impacted by both MP concentration and temperature(P0.05).Growth of Artemia was significantly impacted by temperature(Paling that higher MP concentration could induce oxidative and immunological stress on Artemia at 30℃.Overall,our study suggests that MP and temperature have combined adverse effect on Artemia,especially at relatively high temperature and polystyrene MP *** findings are important to understand the potential ecological risks posed by these two factors on the organisms in marine environment.

关键词： Artemia franciscana combined effect microplastics temperature

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Unsteady Transonic Flow Control around an Airfoil in a Channel

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Journal of Thermal Science 2016年第2期25卷 117-122页

作者： md.Abdul Hamid A.B.M.Toufique Hasan Mohammad ali Yuichi Mitsutake Toshiaki Setoguchi Shen Yu Department of Mechanical Engineering Bangladesh University of Engineering and Technology (BUET) Institute of Ocean Energy Saga University Institute of Engineering Thermophysics Chinese Academy of Science

Transonic internal flow around an airfoil is associated with self-excited unsteady shock wave oscillation. This unsteady phenomenon generates buffet, high speed impulsive noise, non-synchronous vibration, high cycle fatigue failure and so on. Present study investigates the effectiveness of perforated cavity to control this unsteady flow field. The cavity has been incorporated on the airfoil surface. The degree of perforation of the cavity is kept constant as 30%. However, the number of openings(perforation) at the cavity upper wall has been varied. Results showed that this passive control reduces the strength of shock wave compared to that of baseline airfoil. As a result, the intensity of shock wave/boundary layer interaction and the root mean square(RMS) of pressure oscillation around the airfoil have been reduced with the control method.

关键词： transonic flow passive control shock wave oscillation

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Optimal control strategies for preventing hepatitis B infection and reducing chronic liver cirrhosis incidence

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Infectious Disease Modelling 2020年第1期5卷 91-110页

作者： Mst.Shanta Khatun md.Haider ali Biswas Mathematics Discipline Science Engineering and Technology SchoolKhulna UniversityKhulna9208Bangladesh

Advanced liver cirrhosis has become life-threatening among non-communicable diseases ***,the terminal stage of liver diseases in which the liver develops scarring as a result of various long-term continuous *** liver diseases,viral hepatitis is the major risk factor for chronic cirrhosis *** present paper demonstrates a compartmental model of chronic disease liver cirrhosis describing the transmission dynamics of this *** the Pontryagin’s maximum principle,the optimal control policies such as vaccination for hepatitis B virus and treatment of other causes of cirrhosis are adopted as control *** target of this study is to minimize the number of infected and liver cirrhotic individuals as well as the associated cost of the *** this purpose,the optimal control strategies are employed according to the underlying causes behind this *** goal is to find the strategy of preventing hepatitis B infection which is considered one of the leading causes of cirrhosis and consequently,reduction of the chronic cirrhosis *** analysis is also performed to observe the effective control among the two control *** model is investigated both analytically and numerically and the numerical simulations are carried out to illustrate the analytical *** analysis reveals that both the vaccination and treatment could be the most fruitful way to reduce the incidence of chronic liver cirrhosis.

关键词： Liver cirrhosis Hepatitis B infection Vaccination and treatment Optimal control Maximum principle Efficiency analysis