Open Access
ARTICLE
Sooeun Song1, Minsu Choi1, Yunyeong Goh1, Jusik Yun1, Wonsuk Yoo1, Wonsik Yang1, Jaewook Jung1, Jong-Moon Chung1, *
CMC-Computers, Materials & Continua, Vol.62, No.2, pp. 473-494, 2020, DOI:10.32604/cmc.2020.09052
Abstract As next generation communication technologies emerge, new high data rate
applications and high-definition large-screen video streaming have become very popular.
As a result, network traffic has been increasing so much that existing backhaul networks
soon will not be able to support all traffic demands. To support these needs in future 6G
mobile systems, the establishment of an additional backhaul wireless network is
considered essential. As one of the solutions, a wireless backhaul network based on an
aerial platform has been proposed. In order to explore the potential of aerial platforms as
wireless backhaul networks, in this paper, the categories for… More >
Open Access
REVIEW
Junyan Ni1, Xincun Zhuang2, 3, Magd Abdel Wahab4, 5, *
CMC-Computers, Materials & Continua, Vol.62, No.2, pp. 495-523, 2020, DOI:10.32604/cmc.2020.08448
Abstract Residual stress after welding has negative effects on the service life of welded
steel components or structures. This work reviews three most commonly used methods
for predicting residual stress, namely, empirical, semi-empirical and process simulation
methods. Basic principles adopted by these methods are introduced. The features and
limitations of each method are discussed as well. The empirical method is the most
practical but its accuracy relies heavily on experiments. Mechanical theories are
employed in the semi-empirical method, while other aspects, such as temperature
variation and phase transformation, are simply ignored. The process simulation method
has been widely used due to… More >
Open Access
ARTICLE
Mohamed Abd El-Aziz1, 2, A. M. Aly1, 3, *
CMC-Computers, Materials & Continua, Vol.62, No.2, pp. 525-549, 2020, DOI:10.32604/cmc.2020.08576
Abstract This study focusses on the numerical investigations of boundary layer flow for
magnetohydrodynamic (MHD) and a power-law nanofluid containing gyrotactic
microorganisms on an exponentially stretching surface with zero nanoparticle mass flux
and convective heating. The nonlinear system of the governing equations is transformed
and solved by Runge-Kutta-Fehlberg method. The impacts of the transverse magnetic
field, bioconvection parameters, Lewis number, nanofluid parameters, Prandtl number
and power-law index on the velocity, temperature, nanoparticle volume fraction, density
of motile microorganism profiles is explored. In addition, the impacts of these parameters
on local skin-friction coefficient, local Nusselt, local Sherwood numbers and local
density number… More >
Open Access
ARTICLE
Fatima Bayones1, Abdelmooty Abd-Alla2, *, Raghad Alfatta3, Hoda Al-Nefaie3
CMC-Computers, Materials & Continua, Vol.62, No.2, pp. 551-567, 2020, DOI:10.32604/cmc.2020.08420
Abstract The propagation of thermoelastic waves in a homogeneous, isotropic elastic
semi-infinite space is subjected to rotation and initial stress, which is at temperature T0 -
initially, and whose boundary surface is subjected to heat source and load moving with
finite velocity. Temperature and stress distribution occurring due to heating or cooling and
have been determined using certain boundary conditions. Numerical results have been
given and illustrated graphically in each case considered. Comparison is made with the
results predicted by the theory of thermoelasticity in the absence of rotation and initial
stress. The results indicate that the effect of the rotation… More >
Open Access
ARTICLE
Sang-Min Park1, Young-Gab Kim2, *
CMC-Computers, Materials & Continua, Vol.62, No.2, pp. 569-590, 2020, DOI:10.32604/cmc.2020.08666
Abstract Emotions of users do not converge in a single application but are scattered across
diverse applications. Mobile devices are the closest media for handling user data and these
devices have the advantage of integrating private user information and emotions spread
over different applications. In this paper, we first analyze user profile on a mobile device by
describing the problem of the user sentiment profile system in terms of data granularity,
media diversity, and server-side solution. Fine-grained data requires additional data and
structural analysis in mobile devices. Media diversity requires standard parameters to
integrate user data from various applications. A server-side… More >
Open Access
ARTICLE
Noor Mualla1, Essam H Houssein2, *, M. R. Hassan1
CMC-Computers, Materials & Continua, Vol.62, No.2, pp. 591-605, 2020, DOI:10.32604/cmc.2020.08580
Abstract Chronological age estimation using panoramic dental X-ray images is an
essential task in forensic sciences. Various statistical approaches have proposed by
considering the teeth and mandible. However, building automated dental age estimation
based on machine learning techniques needs more research efforts. In this paper, an
automated dental age estimation is proposed using transfer learning. In the proposed
approach, features are extracted using two deep neural networks namely, AlexNet and
ResNet. Several classifiers are proposed to perform the classification task including
decision tree, k-nearest neighbor, linear discriminant, and support vector machine. The
proposed approach is evaluated using a number of suitable… More >
Open Access
ARTICLE
Behrouz Karami1, Maziar Janghorban1, Timon Rabczuk2, *
CMC-Computers, Materials & Continua, Vol.62, No.2, pp. 607-629, 2020, DOI:10.32604/cmc.2020.08032
Abstract This study investigates the forced vibration of functionally graded hexagonal
nano-size plates for the first time. A quasi-three-dimensional (3D) plate theory including
stretching effect is used to model the anisotropic plate as a continuum one where smallscale effects are considered based on nonlocal strain gradient theory. Also, the plate is
assumed on a Pasternak foundation in which normal and transverse shear loads are taken
into account. The governing equations of motion are obtained via the Hamiltonian
principles which are solved using analytical based methods by means of Navier’s
approximation. The influences of the exponential factor, nonlocal parameter, strain gradient
parameter,… More >
Open Access
ARTICLE
Yun Wang1, Fazli Subhan2, Shahaboddin Shamshirband3, 4, *, Muhammad Zubair Asghar5, Ikram Ullah5, Ammara Habib5
CMC-Computers, Materials & Continua, Vol.62, No.2, pp. 631-655, 2020, DOI:10.32604/cmc.2020.07920
Abstract The feedback collection and analysis has remained an important subject matter
for long. The traditional techniques for student feedback analysis are based on
questionnaire-based data collection and analysis. However, the student expresses their
feedback opinions on online social media sites, which need to be analyzed. This study
aims at the development of fuzzy-based sentiment analysis system for analyzing student
feedback and satisfaction by assigning proper sentiment score to opinion words and
polarity shifters present in the input reviews. Our technique computes the sentiment score
of student feedback reviews and then applies a fuzzy-logic module to analyze and
quantify student’s satisfaction… More >
Open Access
ARTICLE
Yasir Nawaz1, Muhammad Shoaib Arif 1, Mairaj Bibi2, *, Javeria Nawaz Abbasi2, Umer Javed3, Amna Nazeer2
CMC-Computers, Materials & Continua, Vol.62, No.2, pp. 657-677, 2020, DOI:10.32604/cmc.2020.08584
Abstract Present contribution is concerned with the construction and application of a
numerical method for the fluid flow problem over a linearly stretching surface with the
modification of standard Gradient descent Algorithm to solve the resulted difference
equation. The flow problem is constructed using continuity, and Navier Stoke equations
and these PDEs are further converted into boundary value problem by applying suitable
similarity transformations. A central finite difference method is proposed that gives
third-order accuracy using three grid points. The stability conditions of the present
proposed method using a Gauss-Seidel iterative procedure is found using VonNeumann stability criteria and order of… More >
Open Access
ARTICLE
N. Shobha Rani1, *, M. Chandrajith2, B. R. Pushpa1, B. J. Bipin Nair1
CMC-Computers, Materials & Continua, Vol.62, No.2, pp. 679-694, 2020, DOI:10.32604/cmc.2020.08552
Abstract Assessing the age of an individual via bones serves as a fool proof method in
true determination of individual skills. Several attempts are reported in the past for
assessment of chronological age of an individual based on variety of discriminative
features found in wrist radiograph images. The permutation and combination of these
features realized satisfactory accuracies for a set of limited groups. In this paper,
assessment of gender for individuals of chronological age between 1-17 years is
performed using left hand wrist radiograph images. A fully automated approach is
proposed for removal of noise persisted due to non-uniform illumination during… More >
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