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Propulsion and Power Research 2018年第4期7卷 320-328页

作者： H.m.Shahadat Ali m.mamun miah m.Ali Akbar Department of Applied mathematics Noakhali Science and Technology UniversityNoakhali 3814Bangladesh Department of mathematics Khulna University of Engineering&Technology.Khulna 9203Bangladesh Department of Applied mathematics University of Rajshahi.Rajshahi 6205Bangladesh

In this article,the two variable(G'G,1/G)-expansion method is suggested to investigate new and further general multiple exact wave solutions to the Drinfeld-Sokolov-Satsuma-Hirota(DSSH)equation and the shallow water wave equation which arise in mathematical physics with the aid of computer algebra software,like *** functions and the rational functions solution are *** method demonstrates power,reliability and ***,the method is the generalization of the well-known(G/G)-expansion method established by Wang et *** the method also presents a wider applicability for conducting nonlinear wave equations.

关键词： Explicit wave solutions Computer algebra software Drinfeld-Sokolov-Satsuma-Hirota(DSSH)equation Shallow water wave equation Soliton

Abundant closed form wave solutions to some nonlinear evolution equations in mathematical physics

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Journal of Ocean Engineering and Science 2020年第3期5卷 269-278页

作者： m.mamun miah Aly R.Seadawy H.m.Shahadat Ali m.Ali Akbar Department of mathematics Khulna University of Engineering&TechnologyBangladesh mathematics Department Taibah UniversityAl-Madinah Al-MunawarahSaudi Arabia Department of mathematics Beni-Suef UniversityEgypt Department of Applied mathematics Noakhali Science and Technology UniversityBangladesh Department of Applied mathematics University of RajshahiRajshahi 6205Bangladesh

The propagation of waves in dispersive media,liquid flow containing gas bubbles,fluid flow in elastic tubes,oceans and gravity waves in a smaller domain,spatio-temporal rescaling of the nonlinear wave motion are delineated by the compound Korteweg-de Vries(KdV)-Burgers equation,the(2+1)-dimensional maccari system and the generalized shallow water wave *** this work,we effectively derive abundant closed form wave solutions of these equations by using the double(G′/G,1/G)-expansion *** obtained solutions include singular kink shaped soliton solutions,periodic solution,singular periodic solution,single soliton and other solutions as *** show that the double(G′/G,1/G)-expansion method is an efficient and powerful method to examine nonlinear evolution equations(NLEEs)in mathematical physics and scientific application.

关键词： Close form solutions KdV-Burgers equation The(2+1)-dimensional maccari system The generalized shallow water wave equation

Further investigations to extract abundant new exact traveling wave solutions of some NLEEs

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Journal of Ocean Engineering and Science 2019年第4期4卷 387-394页

作者： m.mamun miah Aly R.Seadawy H.m.Shahadat Ali m.Ali Akbar Department of mathematics Khulna University of Engineering and TechnologyBangladesh mathematics Department Taibah UniversityAl-Madinah Al-MunawarahSaudi Arabia Department of mathematics Beni-Suef UniversityEgypt Department of Applied mathematics Noakhali Science and Technology UniversityBangladesh Department of Applied mathematics University of RajshahiRajshahi-6205Bangladesh

In this study,we implement the generalized(G/G)-expansion method established by Wang et *** examine wave solutions to some nonlinear evolution *** method,known as the double(G/G,1/G)-expansion method is used to establish abundant new and further general exact wave solutions to the(3+1)-dimensional Jimbo-miwa equation,the(3+1)-dimensional Kadomtsev-Petviashvili equation and symmetric regularized long wave *** solutions are extracted in terms of hyperbolic function,trigonometric function and rational *** solitary wave solutions are constructed from the obtained traveling wave solutions if the parameters received some definite *** of the solutions are also depicted to describe the phenomena apparently and the shapes of the obtained solutions are singular periodic,anti-kink,singular soliton,singular anti-bell shape,compaction *** method is straightforward,compact and reliable and gives huge new closed form traveling wave solutions of nonlinear evolution equations in ocean engineering.

关键词： Exact traveling wave solutions (G/G,1/G)-expansion method (3+1)-dimensional Jimbo-miwa equation (3+1)-dimensional Kadomtsev-Petviashvili equation Symmetric regularized long wave equation

New applications of the two variable (G ′/ G,1/ G)-expansion method for closed form traveling wave solutions of integro-differential equations

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Journal of Ocean Engineering and Science 2019年第2期4卷 132-143页

作者： m.mamun miah H.m.Shahadat Ali m.Ali Akbar Aly R.Seadawy Department of mathematics Khulna University of Engineering and TechnologyBangladesh Department of Applied mathematics Noakhali Science and Technology UniversityBangladesh Department of Applied mathematics University of RajshahiBangladesh mathematics Department Faculty of ScienceTaibah UniversityAl-Madinah Al-MunawarahSaudi Arabia Department of mathematics Faculty of ScienceBeni-Suef UniversityEgypt

most fundamental themes in mathematical physics and modern engineering are investigated by the closed form traveling wave solutions of nonlinear evolution *** our research,we ascertain abundant new closed form traveling wave solution of the nonlinear integro-differential equations via Ito equation,integro-differential Sawada-Kotera equation,first integro-differential KP hierarchy equation and second integro-differential KP hierarchy equation by two variable(G/G,1/G)-expansion method with the help of computer package like *** shape of solutions like,bell profile solution,anti-king profile solution,soliton profile solution,periodic profile solution *** obtain in this *** function solution,hyperbolic function solution and rational function solution are established by using our eminent method and comparing with our results to all of the well-known results which are given in the *** means of free parameters,plentiful solitary solutions are derived from the exact traveling wave *** method can be easier and more applicable to investigate such type of nonlinear evolution models.

关键词： The two variable(G/G,1/G)-expansion method Travelling wave solutions Integro-differential ito equation Integro-differential Sawada-Kotera equation First integro-differential KP hierarchy equation Second integro-differential KP hierarchy equation.

Virtual Keyboard:A Real-Time Hand Gesture Recognition-Based Character Input System Using LSTm and mediapipe Holistic

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Computer Systems Science & Engineering 2024年第2期48卷 555-570页

作者： Bijon mallik md Abdur Rahim Abu Saleh musa miah Keun Soo Yun Jungpil Shin Department of Computer Science and Engineering Pabna University of Science and TechnologyPabna6600Bangladesh School of Computer Science and Engineering The University of AizuAizuwakamatsuFukushima965-8580Japan School of Computer and Information Technology Ulsan CollegeDong-guUlsan44610South Korea

In the digital age,non-touch communication technologies are reshaping human-device interactions and raising security concerns.A major challenge in current technology is the misinterpretation of gestures by sensors and cameras,often caused by environmental *** issue has spurred the need for advanced data processing methods to achieve more accurate gesture recognition and *** study presents a novel virtual keyboard allowing character input via distinct hand gestures,focusing on two key aspects:hand gesture recognition and character input *** developed a novel model with LSTm and fully connected layers for enhanced sequential data processing and hand gesture *** also integrated CNN,max-pooling,and dropout layers for improved spatial feature *** model architecture processes both temporal and spatial aspects of hand gestures,using LSTm to extract complex patterns from frame sequences for a comprehensive understanding of input *** unique dataset,essential for training the model,includes 1,662 landmarks from dynamic hand gestures,33 postures,and 468 face landmarks,all captured in real-time using advanced pose *** model demonstrated high accuracy,achieving 98.52%in hand gesture recognition and over 97%in character input across different *** excellent performance in real-time testing underlines its practicality and effectiveness,marking a significant advancement in enhancing human-device interactions in the digital age.

关键词： Hand gesture recognition m.P.holistic open CV virtual keyboard LSTm human-computer interaction

Stock appraisal for Atlantic tripletail(Lobotes surinamensis;Bloch, 1790) in the Bay of Bengal, Bangladesh

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Journal of Oceanology and Limnology 2024年第05期 1683-1694页

作者： Suman BARUA Qun LIU Ahmed Fazley RABBY md.Abdullah AL-mamun Xu CHEN Rokeya SULTANA Aidah BALOCH College of Fisheries Ocean University of China Department of Fisheries Ministry of Fisheries and Livestock Bangladesh Fisheries Research Institute Directorate of Secondary and Higher Education Ministry of Education Gwadar Development Authority

The Atlantic tripletail (Lobotes surinamensis) is a high revenue-generating fish species predominantly caught by mechanized artisanal fishers community and the most available member of its family in *** is a ground work of fish stock assessment study in the Bay of Bengal region to explore the life history parameters and associated biomass of this species,using three length-based approaches of TropFishR,the length-based Bayesian biomass estimation (LBB),and Froese’s lengthbased indicators (LBIs).An almost homogenous body growth pattern (b=3.07;R2=0.98) was observed in the length-weight relationship of *** life history parameters for tripletail,as determined by the von Bertalanffy Growth Function (VBGF) model,were L∞=113.36 cm and k=0.51/*** length converted catch curve (LCCC) yielded an estimation of the total mortality (Z=1.77/a),with the natural mortality estimated at (m=0.53/a) and the fishing mortality estimated at (F=1.24/a).But,the ratio of mortality(F/m=0.15) by LBB captured the non-fully exploited status of biomass (B/BmSY=2.1).LBI analysis indicated that the tripletail fishery’s spawning stock biomass is greater than the target and limit reference points,indicating a healthy state of biomass.

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Integrated Approaches of mechanical Barrier, Insecticide and Botanicals against mango mealybug (Drosicha mangiferae)

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Advances in Entomology 2024年第3期12卷 195-202页

作者： N. Akhter m. Z. Alam m. A. Rahaman m. R. U. miah I. H. mian m. A. Latif Department of Entomology Faculty of Agriculture Sher-e-Bangla Agricultural University Dhaka Bangladesh Department of Entomology Faculty of Agriculture Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur Bangladesh Department of Plant Pathology Faculty of Agriculture Sher-e-Bangla Agricultural University Dhaka Bangladesh Department of Plant Pathology Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur Bangladesh

An experiment was conducted to test the efficacy of a mechanical barrier around the tree trunk with one spray of Cypermethrin @ 1 ml/l and turmeric powder extract @ 15 g/500ml of water applied in integrated approaches against mango mealybug on mango tree. There were 7 treatments including a control. The treatments were mechanical barrier, Cypermethrin spray @ 1 ml/l, Turmeric powder spray @ 15 g/500ml of water, Cypermethrin spray + Turmeric spray, Cypermethrin spray + mechanical barrier, Turmeric + mechanical barrier and untreated control. Three-year-old mango plants grafted from a 5-year-old mango tree (Variety Amropali) and planted in pots were used in the experiment. The treatment, Cypermethrin spray + mechanical barrier gave the highest reduction of mango mealybug population 87.06% to 93.90% followed by Turmeric spray + mechanical barrier and showed 81.13% to 86.04% and mechanical barrier alone showed 81.13% to 84.59% population reduction. Turmeric powder extract showed only (8.42% to 23.77%) population reduction of mango mealybug which was lowest compared to other treatments.

关键词： mango mealybug Integrated management

Effect of Bohm quantum potential in the propagation of ion–acoustic waves in degenerate plasmas

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Chinese Physics B 2016年第10期25卷 222-229页

作者： m m Hasan m A Hossen A Rafat A A mamun Department of Physics Jahangirnagar University

A theoretical investigation has been carried out on the propagation of the ion–acoustic(IA) waves in a relativistic degenerate plasma containing relativistic degenerate electron and positron fluids in the presence of inertial non-relativistic light ion fluid. The Korteweg-de Vries(K-dV), modified K-dV(m K-dV), and mixed m K-dV(mm K-dV) equations are derived by adopting the reductive perturbation method. In order to analyze the basic features(phase speed, amplitude, width,etc.) of the IA solitary waves(SWs), the SWs solutions of the K-dV, m K-dV, and mm K-d V are numerically analyzed. It is found that the degenerate pressure, inclusion of the new phenomena like the Fermi temperatures and quantum mechanical effects(arising due to the quantum diffraction) of both electrons and positrons, number densities, etc., of the plasma species remarkably change the basic characteristics of the IA SWs which are found to be formed either with positive or negative potential. The implication of our results in explaining different nonlinear phenomena in astrophysical compact objects, e.g.,white dwarfs, neutron stars, etc., and laboratory plasmas like intense laser–solid matter interaction experiments, etc., are mentioned.

关键词： Bohm quantum potential degenerate relativistic plasma electron and positron quantum effect

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Influence of cerium ions on structure-dependent magnetic properties of Ba-Sr m-type hexaferrite nanocrystals

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Journal of Rare Earths 2024年第2期42卷 364-372,I0005页

作者： Ram A.Pawar Sunil m.Patange P.m.Dighe Sher Singh meena Abdullah GAl-Sehemi mehboobali Pannipara Santosh S.Jadhav Department of Physics ArtsCommerce and Science CollegeAhmednagar413711MaharashtraIndia Department of Physics Shri Krishna MahavidyalayaGunjotiDistOsmanabad413606MaharashtraIndia Padmashri Vikhe Patil College of Arts Science and CommercePravaranagarA/P.Loni(Kd)Tal.RahataDistAhmednagar413713MaharashtraIndia Solid State Physics Division Bhabha Atomic Research CentreMumbai400085MaharashtraIndia Department of Chemistry King Khalid UniversityAbha61413Saudi Arabia Department of Physics D.S.M's ArtsCommerce and Science CollegeJintur431509MaharashtraIndia

The present study is a systematic effort to investigate the structure-sensitive magnetic parameters of Ce^(3+) substituted Ba-Sr hexaferrite nanocrystals chemically formulated as Ba_(0.5)Sr_(0.5)Ce_(x)Fe_(12-x)O_(19) where x=0.0-0.2 with Δx=*** hexaferrite powders were prepared using the sol-gel self-ignition route and structurally characterized by means of powder X-ray diffraction and Fourier transform infrared *** creation of the m-type hexaferrite phase within the synthesized samples was revealed from the Rietveld refinement of the X-ray *** occurrence of a secondary phase of CeO_(2) was revealed within the hexaferrites for the substitution,x> *** refined X-ray diffraction data were utilized to compute the lattice parameters,X-ray density,and lattice parameter *** crystal structure plotted from the refined XRD data reveals the occupancy of the ions at different lattice *** XPS data of the hexaferrite were analyzed to confirm the oxidation states of the constituent *** nanocrystalline nature of the hexaferrites was revealed from the crystallite sizes calculated using Scherer's *** analysis of FTIR spectra confirms that only a fraction of Ce^(3+)accommodated in the lattice and the remaining Ce content reside in the form of the CeO_(2) *** morphology of the hexaferrites was analyzed from the FESEm profiles of the ferrite *** magnetic behavior study was performed by analyzing the Curie temperature,hysteresis loops,and hyperfine interactions by means of susceptibility,V.S.m,and mossbauer spectroscopy,*** hexaferrites with increasing coercivity,decreasing saturation magnetization,and decreasing Curie temperature are reported in the *** substituted Ce^(3+)ions inhibit the grain growth and create lattice imperfections giving rise to hexaferrites with tuned magnetic parameters suitable for different applications.

关键词： Ba-Sr hexaferrite Ce^(3+)substitution XPS Saturation magnetization Coercivity m?ssbauer spectroscopy

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Nonplanar Shock Excitations in a Four Component Degenerate Quantum Plasma:the Effects of Various Charge States of Heavy Ions

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Plasma Science and Technology 2015年第3期17卷 177-182页

作者： m.R.HOSSEN A.A.mamun Department of Natural Sciences Daffodil International University Department of Physics Jahangirnagar University

A theoretical study on the nonlinear propagation of nonplanar （cylindrical and spherical） electrostatic modified ion-acoustic （mIA） shock structures has been carried out in an unmagnetized, collisionless four component degenerate plasma system （containing degenerate electron fluids, inertial positively as well as negatively charged light ions, and positively charged static heavy ions）. This investigation is valid for both non-relativistic and ultra-relativistic limits. The modified Burgers （mB） equation has been derived by employing the reductive perturbation method, and used to numerically analyze the basic features of shock structures. It has been found that the effects of degenerate pressure and number density of electron and inertial positively as well as negatively charged light ion fluids, and various charging state of positively charged static heavy ions significantly modify the basic features of mIA shock structures. The implications of our results to dense plasmas in astrophysical compact objects （e.g., non-rotating white dwarfs, neutron stars, etc.） are briefly discussed.

关键词： modified ion-acoustic waves shock waves nonplanar geometry relativistic effect degenerate pressure

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