Journal of Applied Mathematics (J Appl Math)

Publisher: Hindawi Publishing Corporation, Hindawi Publishing Corporation

Journal description

Journal of Applied Mathematics is a refereed journal devoted to the publication of original research papers and review articles in all areas of applied, computational, and industrial mathematics. Subject areas include (but are not limited to): Approximation Theory, Computing, Control and Systems, Differential Equations and Dynamical Systems, Financial Mathematics, Fluid Mechanics and Solid Mechanics, Fractional Calculus and its Applications, Linear and Nonlinear Waves, Numerical Algorithms, Numerical Analysis, Operations Research, Optimization, Partial Differential Equations, Probability and Stochastic Processes, Simulation, Statistics, Wavelets and Wavelet Transforms.

Current impact factor: 0.72

Impact Factor Rankings

2016 Impact Factor Available summer 2017
2013 Impact Factor 0.72
2012 Impact Factor 0.834
2011 Impact Factor 0.656
2010 Impact Factor 0.63

Impact factor over time

Impact factor
Year

Additional details

5-year impact 0.00
Cited half-life 1.60
Immediacy index 0.21
Eigenfactor 0.00
Article influence 0.00
Website Journal of Applied Mathematics website
Other titles Journal of applied mathematics (Online), JAM, Applied mathematics
ISSN 1110-757X
OCLC 51160736
Material type Document, Periodical, Internet resource
Document type Internet Resource, Computer File, Journal / Magazine / Newspaper

Publisher details

Hindawi Publishing Corporation

  • Pre-print
    • Author can archive a pre-print version
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • Publisher's version/PDF may be used
    • Creative Commons Attribution License
    • Eligible UK authors may deposit in OpenDepot
    • All titles are open access journals
  • Classification
    green

Publications in this journal

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    ABSTRACT: Steady flow of a couple-stress fluid in constricted tapered artery has been studied under the effects of transverse magnetic field, moving catheter, and slip velocity. With the help of Bessel’s functions, analytic expressions for axial velocity, flow rate, impedance, and wall shear stress have been obtained. It is of interest to note that these solutions can be used for different types of fluid flow in tubes and not only the case of blood. The effects of various geometric parameters, the parameters arising out of the fluid considered and the magnetic field, are discussed by considering the slip velocity, the catheter velocity, and tapering angle. The study of the above model is very important as it has direct applications in the treatment of cardiovascular diseases.
    No preview · Article · Feb 2016 · Journal of Applied Mathematics
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    ABSTRACT: Chemical entropy generation and magnetohydrodynamic effects on the unsteady heat and fluid flow through a porous medium have been numerically investigated. The entropy generation due to the use of a magnetic field and porous medium effects on heat transfer, fluid friction, and mass transfer have been analyzed numerically. Using a similarity transformation, the governing equations of continuity, momentum, and energy and concentration equations, of nonlinear system, were reduced to a set of ordinary differential equations and solved numerically. The effects of unsteadiness parameter, magnetic field parameter, porosity parameter, heat generation/absorption parameter, Lewis number, chemical reaction parameter, and Brinkman number parameter on the velocity, the temperature, the concentration, and the entropy generation rates profiles were investigated and the results were presented graphically.
    Full-text · Article · Jan 2016 · Journal of Applied Mathematics
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    ABSTRACT: Interval type 2 fuzzy numbers are a special kind of type 2 fuzzy numbers. These numbers can be described by triangular and trapezoidal shapes. In this paper, first, perfectly normal interval type 2 trapezoidal fuzzy numbers with their left-hand and right-hand spreads and their core have been introduced, which are normal and convex; then a new type of fuzzy arithmetic operations for perfectly normal interval type 2 trapezoidal fuzzy numbers has been proposed based on the extension principle of normal type 1 trapezoidal fuzzy numbers. Moreover, in this proposal, linear programming problems with resources and technology coefficients are perfectly normal interval type 2 fuzzy numbers. To solve this kind of fuzzy linear programming problems, a method based on the degree of satisfaction (or possibility degree) of the constraints has been introduced. In this method the fulfillment of the constraints can be measured with the help of ranking method of fuzzy numbers. Optimal solution is obtained at different degree of satisfaction by using Barnes algorithm with the help of MATLAB. Finally, the optimal solution procedure is illustrated with numerical example.
    Full-text · Article · Jan 2016 · Journal of Applied Mathematics
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    ABSTRACT: An epidemic model that describes the dynamics of the spread of infectious diseases is proposed. Two different types of infectious diseases that spread through both horizontal and vertical transmission in the host population are considered. The basic reproduction number R 0 is determined. The local and the global stability of all possible equilibrium points are achieved. The local bifurcation analysis and Hopf bifurcation analysis for the four-dimensional epidemic model are studied. Numerical simulations are used to confirm our obtained analytical results.
    Full-text · Article · Jan 2016 · Journal of Applied Mathematics

  • No preview · Article · Jan 2016 · Journal of Applied Mathematics
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    ABSTRACT: We determine the smallest and the largest number of ( A , B , 2 C ) -edge colourings in trees. We prove that the star is a unique tree that maximizes the number of all of the ( A , B , 2 C ) -edge colourings and that the path is a unique tree that minimizes it.
    Full-text · Article · Dec 2015 · Journal of Applied Mathematics
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    ABSTRACT: Weak convergence of semi-Markov processes in the diffusive approximation scheme is studied in the paper. This problem is not new and it is studied in many papers, using convergence of random processes. Unlike other studies, we used in this paper concept of the compensating operator. It enables getting sufficient conditions of weak convergence under the conditions on the local characteristics of output semi-Markov process.
    Full-text · Article · Dec 2015 · Journal of Applied Mathematics
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    ABSTRACT: Ionic diffusion and heat conduction in a multiple layered porous medium have many important engineering applications. One of the examples is the chloride ions from deicers penetrating into concrete structures such as bridge decks. Different overlays can be placed on top of concrete surface to slowdown the chloride penetration. In this paper, the chloride ion diffusion equations were established for concrete structures with multiple layers of protective system. By using Laplace transformation, an analytical solution was developed first for chloride concentration profiles in two-layered system and then extended to multiple layered systems with nonconstant boundary conditions, including the constant boundary and linear boundary conditions. Because ionic diffusion in saturated media and heat conduction are governed by the same form of partial differential equations with different materials parameters, the analytical solution was further extended to handle heat conduction in a multiple layered system under nonconstant boundary conditions. The numerical results were compared with available test data. The basic trends of the analytical solution and the test data agreed quite well.
    No preview · Article · Nov 2015 · Journal of Applied Mathematics
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    ABSTRACT: The main goal of this paper is to study the motion of two associated ruled surfaces in Euclidean 3-space E 3 . In particular, the motion of Bishop Frenet offsets of ruled surfaces is investigated. Additionally, the characteristic properties for such ruled surfaces are given. Finally, an application is presented and plotted using computer aided geometric design.
    Full-text · Article · Nov 2015 · Journal of Applied Mathematics
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    ABSTRACT: Given a planar system of nonautonomous ordinary differential equations, d w / d t = F ( t , w ) , conditions are given for the existence of an associative commutative unital algebra A with unit e and a function H : Ω ⊂ R 2 × R 2 → R 2 on an open set Ω such that F ( t , w ) = H ( t e , w ) and the maps H 1 ( τ ) = H ( τ , ξ ) and H 2 ( ξ ) = H ( τ , ξ ) are Lorch differentiable with respect to A for all ( τ , ξ ) ∈ Ω , where τ and ξ represent variables in A . Under these conditions the solutions ξ ( τ ) of the differential equation d ξ / d τ = H ( τ , ξ ) over A define solutions ( x ( t ) , y ( t ) ) = ξ ( t e ) of the planar system.
    Full-text · Article · Nov 2015 · Journal of Applied Mathematics
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    ABSTRACT: Dr. Wei Fang acknowledges the support from the National Nature Science Foundation of China (Grants nos. 61105128, 61170119, and 61373055), the Nature Science Foundation of Jiangsu Province, China (Grants nos. BK20131106, BK20130161, and BK20130160), the Postdoctoral Science Foundation of China (Grant no. 2014M560390), the Fundamental Research Funds for the Central Universities, China (Grant no. JUSRP51410B), and Six Talent Peaks’ Project of Jiangsu Province (Grant no. DZXX-025). As guest editors, we would like to thank the contributing authors and the reviewers for their hard work in preparing and reviewing the submissions.
    Full-text · Article · Oct 2015 · Journal of Applied Mathematics
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    ABSTRACT: Similarity of plume radiation between reduced scaling solid rocket models and full scale ones in ground conditions has been taken for investigation. Flow and radiation of plume from solid rockets with scaling ratio from 0.1 to 1 have been computed. The radiative transfer equation (RTE) is solved by the finite volume method (FVM) in infrared band 2~6 μ m. The spectral characteristics of plume gases have been calculated with the weighted-sum-of-gray-gas (WSGG) model, and those of the Al 2 O 3 particles have been solved by the Mie scattering model. Our research shows that, with the decreasing scaling ratio of the rocket engine, the radiation intensity of the plume decreases with 1.5~2.5 power of the scaling ratio. The infrared radiation of the plume gases shows a strong spectral dependency, while that of the Al 2 O 3 particles shows grey property. Spectral radiation intensity of the high temperature core of the solid rocket plume increases greatly in the peak absorption spectrum of plume gases. Al 2 O 3 particle is the major radiation composition in the rocket plume, whose scattering coefficient is much larger than its absorption coefficient. There is good similarity between spectral variations of plumes from different scaling solid rockets. The directional plume radiation rises with the increasing azimuth angle.
    Full-text · Article · Oct 2015 · Journal of Applied Mathematics
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    ABSTRACT: This paper deals with the short-term scheduling problem of hydropower systems. The objective is to meet the daily energy demand in an economic and safe way. The individuality of the generating units and the nonlinearity of their efficiency curves are taken into account. The mathematical model is formulated as a dynamic, mixed integer, nonlinear, nonconvex, combinatorial, and multiobjective optimization problem. We propose two solution methods using metaheuristic approaches. They combine Genetic Algorithm with Strength Pareto Evolutionary Algorithm and Ant Colony Optimization. Both approaches are divided into two phases. In the first one, to maximize the plant’s net generation, the problem is solved for each hour of the day (static dispatch). In the second phase, to minimize the units’ switching on-off, the day is considered as a whole (dynamic dispatch). The proposed methodology is applied to two Brazilian hydroelectric plants, in cascade, that belong to the national interconnected system. The nondominated solutions from both approaches are presented. All of them meet demand respecting the physical, electrical, and hydraulic constraints.
    Full-text · Article · Oct 2015 · Journal of Applied Mathematics
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    ABSTRACT: This study adopts a narrow band model to investigate the cooling and radiation of a vectoring nozzle and to compute the gas spectral characteristic in infrared band. The radiative heat transfer between the hot gas and the wall is considered with an enclosure model. The calculation of film cooling is performed through a cooling effectiveness method. A coupled heat balance equation of heat flux and wall temperature is established on the multilayer structure of the nozzle, including the wall, heat shield, and outer shield, and a Newton-Raphson scheme is taken for solution. Temperature on the expansion part of an experimental nozzle in NASA TN D-1988 is investigated for verification. Another vectoring nozzle with a multirow of film cooling is also investigated. This study shows that the film in the heat shield remarkably cools the convergent part of the nozzle, thereby increasing the temperature on the expansion part of the nozzle. The deflection of the nozzle can change the distribution of the wall temperature and the radiation on the expansion part, which is lower on the deflection side than on the opposite side. The radiation from the nozzle outlet is high, particularly along the deflection direction in the rear hemisphere.
    No preview · Article · Oct 2015 · Journal of Applied Mathematics
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    ABSTRACT: Network reconfiguration is an effective approach to reduce the power losses in distribution system. Recent studies have shown that the reconfiguration problem considering load profiles can give a significant improvement on the distribution network performance. This work proposes a novel method to determine the optimal daily configuration based on variable photovoltaic (PV) generation output and the load profile data. A good combination and coordination between these two varying data may give the lowest power loss in the system. Gravitational Search Algorithm (GSA) is applied to determine the optimum tie switches positions for 33-Bus distribution system. GSA based proposed method is also compared with Evolutionary Programming (EP) to examine the effectiveness of GSA algorithm. Obtained results show that the proposed optimal daily configuration method is able to improve the distribution network performance in term of its power loss reduction, number of switching minimization and voltage profile improvement.
    No preview · Article · Oct 2015 · Journal of Applied Mathematics
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    ABSTRACT: A rigorous and novel design procedure is constituted for an ultra-wideband (UWB) low noise amplifier (LNA) by exploiting the 3D electromagnetic simulator based support vector regression machine (SVRM) microstrip line model. First of all, in order to design input and output matching circuits (IMC-OMC), source ZS and load ZL termination impedance of matching circuit, which are necessary to obtain required input VSWR (Vireq), noise (Freq), and gain (GTreq), are determined using performance characterisation of employed transistor, NE3512S02, between 3 and 8 GHz frequencies. After the determination of the termination impedance, to provide this impedance with IMC and OMC, dimensions of microstrip lines are obtained with simple, derivative-free, easily implemented algorithm Particle Swarm Optimization (PSO). In the optimization of matching circuits, highly accurate and fast SVRM model of microstrip line is used instead of analytical formulations. ADCH-80a is used to provide ultra-wideband RF choking in DC bias. During the design process, it is aimed that Vireq = 1.85, Freq = Fmin, and GTreq = GTmax all over operating frequency band. Measurements taken from the realized LNA demonstrate the success of this approximation over the band.
    Full-text · Article · Oct 2015 · Journal of Applied Mathematics
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    ABSTRACT: An analytical solution for the heat transfer in hollow cylinders with time-dependent boundary condition and time-dependent heat transfer coefficient at different surfaces is developed for the first time. The methodology is an extension of the shifting function method. By dividing the Biot function into a constant plus a function and introducing two specially chosen shifting functions, the system is transformed into a partial differential equation with homogenous boundary conditions only. The transformed system is thus solved by series expansion theorem. Limiting cases of the solution are studied and numerical results are compared with those in the literature. The convergence rate of the present solution is fast and the analytical solution is simple and accurate. Also, the influence of physical parameters on the temperature distribution of a hollow cylinder along the radial direction is investigated.
    No preview · Article · Oct 2015 · Journal of Applied Mathematics
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    ABSTRACT: Natural convection heat transfer in a two-dimensional square enclosure at various angles of inclination is investigated numerically using a finite volume based computational procedure. The heat transfer is from a constant temperature heat source of finite length centred at one of the walls to the cold wall on the opposite side while the remaining walls are insulated. The effect of area ratio of the heat source A from 0.2 to 1.0, Rayleigh number Ra from 10 3 to 10 7 , and angle of inclination of the enclosure θ varying from 0° to 360° on the flow field and heat transfer characteristics are investigated. Streamline and isothermal line patterns are found to be similar at low Rayleigh numbers whereas at high Rayleigh numbers the differences are significant due to the influence of the parameters considered. Average Nusselt number decreases drastically as the position of the heat source is moved above the horizontal centre line of the enclosure. Correlation of the average Nusselt number which depends on the parameters of interest is obtained in the general form C R a m A n . The correlation coefficients are determined by multiple regression analysis for the entire range of Rayleigh numbers analysed and the values found by correlation equations are in good agreement with the numerical results.
    No preview · Article · Oct 2015 · Journal of Applied Mathematics