检索结果-南通市图书馆

A new analysis of fractional fish farm model associated with Mittag-Leffler-type kernel

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Biomathematics 2020年第2期13卷 35-51页

作者： Jagdev Singh devendra kumar Dumitru Baleanu Departmert of Maternatics JECRC UriversitgJaipur 303905RajasthanIrdia Departrruent of Matherratics Uriversitgy of Rajasthan Jaipur 302004RajzsthanIndia Department of Matheratics Facultg of Arts and Scierces arkaya UriwersitxEskischir Yolu 29.Km Yukarxgyurtcax Mahallesi Mimar Siran Caddesi No:406790 EtimesgutTurkey Institute of Space Sciences Migurele-BxucharestHowranria

In this paper,we analyze the dynamical behavior of fish farm model related to Atangana-Baleanu derivative of arbitrary *** rnodel is constituted with the group of non-linear differential equations having nutrients,fish and *** have included discrete kind gestational delay of *** solution of fish farm model is determined by employing homotopy analysis transforms method(HATM).Existence of and uniqueness of solution are studied through Picard-Lindelof *** influence of order of new non-integer order derivative on nutrients,fish and mussel is *** complete study reveals that the outer food supplies manage the behavior of the ***,to show the outcomes of the study,some numerical results are demonstrated through graphs.

关键词： Fish farm dynamical model Atangana-Baleanu fractional derivative Picard-Lindelof approach fixed point theorem stability analysis

FDTD based transition time dependent crosstalk analysis for coupled RLC interconnects

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 Semiconductors 2014年第5期35卷 69-73页

作者： devendra kumar Sharma Brajesh kumar Kaushik R.K.Sharma Department of ECE Meerut Institute of Engineering and TechnologyMeerut India Department of Electronics & Computer Engineering Indian Institute of TechnologyRoorkee India Department of ECE National Institute of TechnologyKurukshetra Haryana India

The performance of high density chips operating in the GHz range is mostly affected by on-chip interconnects. The interconnect delay depends on many factors, a few of them are inputs toggling patterns, line ＆ coupling parasitics, input rise/fall time and source/load characteristics. The transition time of the input is of prime importance in high speed circuits. This paper addresses the FDTD based analysis of transition time effects on functional and dynamic crosstalk. The analysis is carried out for equal and unequal transition times of coupled inputs. The analysis of the effects of unequal rise time is equally important because practically, it is quite common to have mismatching in the rise time of the signals transmitting through different length wires. To demonstrate the effects, two distributed RLC lines coupled inductively and capacitively are taken into consideration. The FDTD technique is used because it gives accurate results and carries time domain analysis of coupled lines. The number of lumps in SPICE simulations is considered the same as those of spatial segments. To validate the FDTD computed results, SPICE simulations are run and results are compared. A good agreement of the computed results has been observed with respect to SPICE simulated results. An average error of less than 3.2% is observed in the computation of the performance parameters using the proposed method.

关键词： FDTD transition time crosstalk noise delay coupled interconnects

维普期刊数据库

Fractal dynamics and computational analysis of local fractional Poisson equations arising in electrostatics

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2023年第12期75卷 12-18页

作者： Jagdev Singh Hassan Kamil Jassim devendra kumar Ved Prakash Dubey Department of Mathematics JECRC UniversityJaipurRajasthanIndia Department of Mathematics Kyung Hee University26 Kyungheedae-roDongdaemun-guSeoul02447Republic of Korea Department of Computer Science and Mathematics Lebanese American UniversityBeirutLebanon Department of Mathematics Faculty of Education for Pure SciencesUniversity of Thi-QarNasiriyahIraq Department of Mathematics University of RajasthanJaipur-302004RajasthanIndia Faculty of Mathematical and Statistical Sciences Shri Ramswaroop Memorial UniversityBarabanki-225003Uttar PradeshIndia

In this paper,the local fractional natural decomposition method(LFNDM)is used for solving a local fractional Poisson *** local fractional Poisson equation plays a significant role in the study of a potential field due to a fixed electric charge or mass density *** examples with computer simulations are presented in this *** obtained results show that LFNDM is effective and convenient for application.

关键词： poisson equation local fractional natural transform adomian decomposition method local fractional derivative electrostatics fractal media

维普期刊数据库

Numerical study of fractional model of multi-dimensional dispersive partial differential equation

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean Engineering and Science 2019年第4期4卷 338-351页

作者： Vijay Verma Amit Prakash devendra kumar Jagdev Singh Department of Mathematics Pt.C.L.S.Govt.(PG)CollegeKarnalHaryanaIndia Department of Mathematics National Institute of TechnologyKurukshetra 136119India Department of Mathematics University of RajasthanJaipur 302004RajasthanIndia Department of Mathematics JECRC UniversityJaipur 303905RajasthanIndia

This article is devoted to a newly introduced numerical method for time-fractional dispersive partial differential equation in a multidimensional *** time-fractional dispersive partial differential equation plays a great role in solving the problems arising in ocean science and *** numerical technique comprises of Sumudu transform,homotopy perturbation scheme and He’s polynomial,namely homotopy perturbation Sumudu transform method(HPSTM)is efficiently used to examine time-fractional dispersive partial differential equation of third order in multi-dimensional *** approximate analytic solution of the time-fractional dispersive partial differential equation of third-order in multi-dimensional space obtained by HPSTM is compared with exact solution as well as the solution obtained by using Adomain decomposition *** results derived with the aid of two techniques are in a good agreement and consequently these techniques may be considered as an alternative and efficient approach for solving fractional partial differential *** test problems are experimented to confirm the accuracy and efficiency of the proposed methods.

关键词： Homotopy perturbation method Fractional trigonometric function He’s polynomials Adomian decomposition method Sumudu transform

Discussion on“Dispersion characteristics of clayey soils containing waste rubber particles”[J Rock Mech Geotech Eng 15(2023)3050-3058]

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 Rock Mechanics and Geotechnical Engineering 2024年第9期16卷 3864-3865页

作者： Prithvendra Singh devendra Narain Singh Pintu kumar Saw Department of Civil Engineering Indian Institute of Technology BombayMumbai400076India

We read with great interest the recent article by Erenson(2023)entitled“Dispersion characteristics of clayey soils containing waste rubber particles”.The author has studied the dispersion characteristics of clayey soils containing different percentages of waste rubber particles(WRPs)by performing several tests(*** limit,linear shrinkage limit,double hydrometer,crumb test and pinhole test)and scanning electron microscopy(SEM)analysis on five clayey(***-activated bentonite,refined ball clay,Ukrainian kaolin,Avanos kaolin and Afyon clay)samples containing 0%,5%,10%and 15%*** should be noted that Erenson(2023)has presented some interesting observations,but there are some serious issues that we want to share through this discussion and request the author of the original paper to address them to avoid their persistence in the scientific literature.

关键词： Waste rubber particles Dispersion characteristics Clay Bentonite Scientific literature Discussion

An efficient analytical technique for fractional partial differential equations occurring in ion acoustic waves in plasma

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 Ocean Engineering and Science 2019年第2期4卷 85-99页

作者： Amit Goswami Jagdev Singh devendra kumar Sumit Gupta Sushila Department of Physics Jagan Nath UniversityJaipur 303901RajasthanIndia Department of Mathematics JECRC UniversityJaipur 303905RajasthanIndia Department of Mathematics University of RajasthanJaipur 302004RajasthanIndia Department of Mathematics Swami Keshvanand Institute of TechnologyManagement and GramothanRamnagariaJaipur 302017RajasthanIndia Department of Physics Vivekananda Global UniversityJaipur 303012RajasthanIndia

In this work,we apply an efficient analytical algorithm namely homotopy perturbation Sumudu transform method(HPSTM)to find the exact and approximate solutions of linear and nonlinear time-fractional regularized long wave(RLW)*** RLW equations describe the nature of ion acoustic waves in plasma and shallow water waves in *** derived results are very significant and imperative for explaining various physical *** suggested method basically demonstrates how two efficient techniques,the Sumudu transform scheme and the homotopy perturbation technique can be integrated and applied to find exact and approximate solutions of linear and nonlinear time-fractional RLW *** nonlinear expressions can be simply managed by application of He’s *** result shows that the HPSTM is very powerful,efficient,and simple and it eliminates the round-off *** has been observed that the proposed technique can be widely employed to examine other real world problems.

关键词： Sumudu transform scheme Homotopy perturbation technique RLW equations Ion acoustic wave Shallow water waves in oceans.

Growth and Approximation of Generalized Bi-Axially Symmetric Potentials

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 Mathematical Research with Applications 2015年第6期35卷 613-624页

作者： devendra kumar Anindita BASU Department of Mathematics Faculty of Science Al-Baha University Department of Mathematics Dr.Bhupendra Nath Dutta Smriti MahavidyalayaBurdwan P.O Box- 713407 West Bengal India

The paper deals with growth estimates and approximation(not necessarily entire) of solutions of certain elliptic partial differential equations. These solutions are called generalized bi-axially symmetric potentials(GBASP’s). To obtain more refined measure of growth, we have defined q-proximate order and obtained the characterization of generalized q-type and generalized lower q-type with respect to q-proximate order of a GBASP in terms of approximation errors and ratio of these errors in sup norm.

关键词： generalized bi-axially symmetric potentials q-proximate order Jacobi polynomials generalized q-type generalized lower q-type approximation errors

Introduction to the Special Issue on Numerical Methods for Differential and Integral Equations

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2020年第6期123卷 913-915页

作者： Şuayip Yüzbaşı Kamel Al-Khaled Nurcan BaykuşSavaşaneril devendra kumar Department of Mathematics Faculty of ScienceAkdeniz UniversityAntalyaTr-07058Turkey Department of Mathematics and Statistics Jordan University of Science and TechnologyIrbid22110Jordan Izmir Vocational School Dokuz Eylül UniversityİzmirTurkey Department of Mathematics University of RajasthanJaipur302004India

Differential and integral equations have a major role in many applied areas of science and engineering,For example,physics,chemistry,astronomy,biology,mechanics,electronic,economics,potential theory,***,the obtaining of solutions of these equations is *** the mentioned equations are usually difficult to solve analytically,numerical methods are ***,this Special Issue contributes to new numerical methods for solving the above-mentioned equations and thus,many problems in science and engineering can be solved using new numerical methods analyzed in this special issue.

关键词： mentioned equations Issue

Effect of Surface Roughness on Laser Induced Nonlinear Optical Properties of Annealed ZnO Thin Films

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 Materials Science & Technology 2012年第6期28卷 506-511页

作者： Vinay kumari Vinod kumar devendra Mohan Purnima B.P.Malik R.M.Mehra Department of Physics BMIETSonepat 131001India Department of Physics DCRUSTMurthal 131027India Materials Science Group Inter University Accelerator CentreAruna Asaf Ali MargNew Delhi 110067India Department of Applied Physics GJUS&THisar 125001India School of Engineering and Technology Sharda UniversityGreater Noida 201306India

Variation of nonlinear optical properties with surface roughness of ZnO thin films deposited on coming glass substrates at different annealing temperature （TA） was reported. The films were characterized by X-ray diffraction （XRD）, UV-Vis-NIR transmission and single beam z-scan technique using second harmonics of Nd：YAG laser. Surface morphology of the samples was investigated by atomic force microscopy （AFM）. Surface roughness was found minimum （8.4 nm） for ZnO sample annealed at 450℃. The nonlinear optical properties （NLO） were found to be dependent on surface roughness and the highest value of third order nonlinear susceptibility （X（3）=4.3x 10-7 esu） was obtained for ZnO at TA 450℃.

关键词： ZnO films Sol-gel Annealing temperature Nonlinear optical properties Thirdorder nonlinear susceptibility z-scan

维普期刊数据库