Open Access
ARTICLE
Soukaina Mjahed1,*, Khadija Bouzaachane1, Ahmad Taher Azar2,3, Salah El Hadaj1, Said Raghay1
CMES-Computer Modeling in Engineering & Sciences, Vol.125, No.2, pp. 459-494, 2020, DOI:10.32604/cmes.2020.010791
Abstract This paper focuses on the unsupervised detection of the Higgs boson
particle using the most informative features and variables which characterize
the “Higgs machine learning challenge 2014” data set. This unsupervised
detection goes in this paper analysis through 4 steps: (1) selection of the most
informative features from the considered data; (2) definition of the number of
clusters based on the elbow criterion. The experimental results showed that
the optimal number of clusters that group the considered data in an unsupervised manner corresponds to 2 clusters; (3) proposition of a new approach
for hybridization of both hard and fuzzy clustering… More >
Open Access
ARTICLE
Zhiyuan Liu1,2, Xin Tan2, Xiaobo Liu1,2, Pingan Chen1,2, Ke Yi1,2, Tianzhi Yang1,2, Qiao Ni3,4, Lin Wang3,4,*
CMES-Computer Modeling in Engineering & Sciences, Vol.125, No.2, pp. 495-514, 2020, DOI:10.32604/cmes.2020.012030
Abstract Cantilevered pipe conveying fluid may become unstable and flutter
instability would occur when the velocity of the fluid flow in the pipe exceeds
a critical value. In the present study, the theoretical model of a cantilevered
fluid-conveying pipe attached by an inerter-based dynamic vibration absorber
(IDVA) is proposed and the stability of this dynamical system is explored.
Based on linear governing equations of the pipe and the IDVA, the effects
of damping coefficient, weight, inerter, location and spring stiffness of the
IDVA on the critical flow velocities of the pipe system is examined. It is shown
that the stability of… More >
Open Access
ARTICLE
Yi Yang, Robert Nawrocki, Richard Voyles, Haiyan H. Zhang*
CMES-Computer Modeling in Engineering & Sciences, Vol.125, No.2, pp. 515-539, 2020, DOI:10.32604/cmes.2020.010165
Abstract Equipped with a two-dimensional topological structure, a group
of masses, springs and dampers can be demonstrated to model the internal
dynamics of a thin-film transistor (TFT). In this paper, the two-dimensional
Mass-Spring-Damper (MSD) representation of an inverted staggered TFT
is proposed to explore the TFT’s internal stress/strain distributions, and the
stress-induced effects on TFT’s electrical characteristics. The 2D MSD model
is composed of a finite but massive number of interconnected cellular units.
The parameters, such as mass, stiffness, and damping ratios, of each cellular
unit are approximated from constitutive equations of the composite materials,
while the electrical properties of the… More >
Open Access
ARTICLE
Jingfa Li1, Bo Yu1,*, Qianqian Shao2, Dongliang Sun1
CMES-Computer Modeling in Engineering & Sciences, Vol.125, No.2, pp. 541-563, 2020, DOI:10.32604/cmes.2020.011835
Abstract In this work, the drag-reducing mechanism of high-Reynoldsnumber turbulent channel flow with surfactant additives is investigated by
using large eddy simulation (LES) method. An N-parallel finitely extensible
nonlinear elastic model with Peterlin’s approximation (FENE-P) is used to
describe the rheological behaviors of non-Newtonian fluid with surfactant.
To close the filtered LES equations, a hybrid subgrid scale (SGS) model
coupling the spatial filter and temporal filter is applied to compute the subgrid
stress and other subfilter terms. The finite difference method and projection
algorithm are adopted to solve the LES governing equations. To validate
the correctness of our LES method and… More >
Open Access
ARTICLE
Anber Saleem1,2, Salman Akhtar3, Sohail Nadeem3,*, Alibek Issakhov4, Mehdi Ghalambaz5,6
CMES-Computer Modeling in Engineering & Sciences, Vol.125, No.2, pp. 565-577, 2020, DOI:10.32604/cmes.2020.011883
Abstract The blood flow through a catheterized artery having a mild stenosis at the wall together with a blood clot at the centre is studied in the
current investigation. Stenosis can occur in vessels carrying blood to brain
(i.e., Carotid arteries), Renal arteries that supply blood to kidneys etc. The
flow is refined in such vessels by application of catheter. We have used a
Newtonian viscous fluid model and also distinct shapes of stenosis, (i.e.,
symmetric and non-symmetric shapes) are considered for this study. The
entropy generation together with viscous dissipation is also taken into account
for a complete description of… More >
Open Access
ARTICLE
Xing Deng1,2, Haijian Shao1,2,*, Liang Shi3, Xia Wang4,5, Tongling Xie6
CMES-Computer Modeling in Engineering & Sciences, Vol.125, No.2, pp. 579-596, 2020, DOI:10.32604/cmes.2020.011920
Abstract The Coronavirus Disease 2019 (COVID-19) is wreaking havoc
around the world, bring out that the enormous pressure on national health
and medical staff systems. One of the most effective and critical steps in
the fight against COVID-19, is to examine the patient’s lungs based on the
Chest X-ray and CT generated by radiation imaging. In this paper, five
keras-related deep learning models: ResNet50, InceptionResNetV2, Xception, transfer learning and pre-trained VGGNet16 is applied to formulate an
classification–detection approaches of COVID-19. Two benchmark methods
SVM (Support Vector Machine), CNN (Convolutional Neural Networks) are
provided to compare with the classification–detection approaches based on… More >
Open Access
ARTICLE
Ting Zang1, Dongbin Zhu2,*, Guowang Mu1
CMES-Computer Modeling in Engineering & Sciences, Vol.125, No.2, pp. 597-610, 2020, DOI:10.32604/cmes.2020.09965
（This article belongs to this Special Issue: Design & simulation in Additive Manufacturing)
Abstract According to the requirement of heterogeneous object modeling
in additive manufacturing (AM), the Non-Uniform Rational B-Spline
(NURBS) method has been applied to the digital representation of heterogeneous object in this paper. By putting forward the NURBS material
data structure and establishing heterogeneous NURBS object model, the
accurate mathematical unified representation of analytical and free heterogeneous objects have been realized. With the inverse modeling of heterogeneous
NURBS objects, the geometry and material distribution can be better
designed to meet the actual needs. Radical Basis Function (RBF) method
based on global surface reconstruction and the tensor product surface
interpolation method are combined… More >
Open Access
ARTICLE
Jiachen Guo1,2, Yunfei Xu2, Zhenyu Jiang1,*, Xiaoyi Liu2, Yang Cai2,*
CMES-Computer Modeling in Engineering & Sciences, Vol.125, No.2, pp. 611-623, 2020, DOI:10.32604/cmes.2020.011148
Abstract Both of Buckling and post-buckling are fundamental problems of
geometric nonlinearity in solid mechanics. With the rapid development of
nanotechnology in recent years, buckling behaviors in nanobeams receive
more attention due to its applications in sensors, actuators, transistors, probes,
and resonators in nanoelectromechanical systems (NEMS) and biotechnology. In this work, buckling and post-buckling of copper nanobeam under
uniaxial compression are investigated with theoretical analysis and atomistic
simulations. Different cross sections are explored for the consideration of
surface effects. To avoid complicated high order buckling modes, a stressbased simplified model is proposed to analyze the critical strain for buckling,
maximum deflection,… More >
Open Access
ARTICLE
S. Velliangiri1,*, J. Premalatha2
CMES-Computer Modeling in Engineering & Sciences, Vol.125, No.2, pp. 625-645, 2020, DOI:10.32604/cmes.2020.010869
（This article belongs to this Special Issue: Security Enhancement of Image Recognition System in IoT based Smart Cities)
Abstract Different devices in the recent era generated a vast amount of
digital video. Generally, it has been seen in recent years that people are
forging the video to use it as proof of evidence in the court of justice.
Many kinds of researches on forensic detection have been presented, and
it provides less accuracy. This paper proposed a novel forgery detection
technique in image frames of the videos using enhanced Convolutional Neural Network (CNN). In the initial stage, the input video is taken as of
the dataset and then converts the videos into image frames. Next, perform
pre-sampling using the… More >
Open Access
ARTICLE
Yongping Yu1, Lihui Chen1, Juanjuan Wang1, Guoji Liu2,*
CMES-Computer Modeling in Engineering & Sciences, Vol.125, No.2, pp. 647-670, 2020, DOI:10.32604/cmes.2020.011067
Abstract The tower line system will be in an unsafe status due to uniform or
uneven fall of ice coating which is attached to the surface of tower and lines.
The fall of ice could be caused by wind action or thermal force. In order to
study the dynamic characteristics of the self-failure of the transmission line
under the action of dynamic wind load, a finite element model of the two-span
transmission tower line system was established. The birth and death element
methods are used to simulate the icing and shedding of the line. Tensile failure
strength is the shedding criterion… More >
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