Open Access
EDITORIAL
Xiaodan Ren1,*, Tiancan Huang2
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 411-413, 2020, DOI:10.32604/cmes.2020.012603
（This article belongs to this Special Issue: Numerical Modeling and Simulation for Structural Safety and Disaster Mitigation)
Abstract This article has no abstract. More >
Open Access
ARTICLE
Yafei Zhang1,2, Ping Tan1,2,*, Haitao Ma1,2, Marco Donà1,2
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 415-431, 2020, DOI:10.32604/cmes.2020.09054
（This article belongs to this Special Issue: Numerical Modeling and Simulation for Structural Safety and Disaster Mitigation)
Abstract A staircase provides the main escape way from a building in an emergency. Unfortunately, it may suffer severe damages or even collapse during an
earthquake. For improving the seismic performance of staircases, this paper
proposes an innovative staircase isolator with the features of lightweight, costeffective and ease of construction and replacement, which is formed by suitable
engineering plastic shims between rubber layers. A connection construction
scheme is also proposed for the isolated staircase. Systematic performance tests
have been carried out to characterize the isolator in terms of mechanic behavior
and ultimate states. The test results show that mechanical properties of… More >
Open Access
ARTICLE
Dongyue Tang1, Ming Zhao1, *
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 433-457, 2020, DOI:10.32604/cmes.2020.09268
（This article belongs to this Special Issue: Numerical Modeling and Simulation for Structural Safety and Disaster Mitigation)
Abstract The monopile foundation is the main form of offshore wind turbine foundation,
and its surrounding scouring pit will reduce the constraints of the soil on the piles, which
makes wind turbine foundation instability a key issue affecting the structural safety of
offshore wind turbines. In previous studies, the rotating rotor and control system are
neglected when studying the influence of scour on the offshore wind turbine structure.
In this paper, the numerical model of the blade-tower-monopile integrated offshore wind
turbine is established, and the influence of scour on the dynamic characteristics of wind
turbine is obtained considering parameters, such as… More >
Open Access
ARTICLE
N. Ganesh1, R. K. Ghadai2, A. K. Bhoi3, K. Kalita4,*, Xiao-Zhi Gao5
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 459-476, 2020, DOI:10.32604/cmes.2020.09645
Abstract Electrical Discharge Machining (EDM) is a popular non-traditional
machining process that is widely used due to its ability to machine hard and brittle
materials. It does not require a cutting tool and can machine complex geometries
easily. However, it suffers from drawbacks like a poor rate of machining and
excessive tool wear. In this research, an attempt is made to address these issues
by using an intelligent predictive model coupled global optimization approach
to predict suitable combinations of input parameters (current, pulse on-time and
pulse off-time) that would effectively increase the material removal rate and minimize the tool wear. The… More >
Open Access
ARTICLE
Muhammad Shoaib Arif1,*, Ali Raza1,2, Kamaleldin Abodayeh3, Muhammad Rafiq4, Mairaj Bibi5, Amna Nazeer5
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 477-491, 2020, DOI:10.32604/cmes.2020.011121
Abstract The essential features of the nonlinear stochastic models are positivity,
dynamical consistency and boundedness. These features have a significant role in
different fields of computational biology and many more. The aim of our paper, to
achieve the comparison analysis of the stochastic susceptible, infected recovered
epidemic model. The stochastic modelling is a realistic way to study the dynamics
of compartmental modelling as compared to deterministic modelling. The effect
of reproduction number has also observed in the stochastic susceptible, infected
recovered epidemic model. For comparison analysis, we developed some explicit
stochastic techniques, but they are the time-dependent techniques. The implicitly
driven… More >
Open Access
ARTICLE
Rafael Company1, Vera N. Egorova2, Lucas Jódar1,*, Ferran Fuster Valls3
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 493-508, 2020, DOI:10.32604/cmes.2020.010208
Abstract A numerical method for American options pricing on assets under the
Heston stochastic volatility model is developed. A preliminary transformation is
applied to remove the mixed derivative term avoiding known numerical drawbacks and reducing computational costs. Free boundary is treated by the penalty
method. Transformed nonlinear partial differential equation is solved numerically
by using the method of lines. For full discretization the exponential time differencing method is used. Numerical analysis establishes the stability and positivity of
the proposed method. The numerical convergence behaviour and effectiveness are
investigated in extensive numerical experiments. More >
Open Access
ARTICLE
Lijian Xu1, Tianyang Yang2, Lekang Yin3, Ye Kong2, Yuri Vassilevski4,5, Fuyou Liang1,5,6,*
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 509-526, 2020, DOI:10.32604/cmes.2020.010719
Abstract Computational modeling methods have been increasingly employed to
quantify aortic hemodynamic parameters that are challenging to in vivo measurements but important for the diagnosis/treatment of aortic disease. Although the
presence of turbulence-like behaviors of blood flow in normal or diseased aorta
has long been confirmed, the majority of existing computational model studies
adopted the laminar flow assumption (LFA) in the treatment of sub-grid flow variables. So far, it remains unclear whether LFA would significantly compromise the
reliability of hemodynamic simulation. In the present study, we addressed the
issue in the context of a specific aortopathy, namely aortic dilation, which is… More >
Open Access
ARTICLE
Zhenghao Yang, Erkan Oterkus*, Selda Oterkus
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 527-544, 2020, DOI:10.32604/cmes.2020.010804
Abstract In this study, a new state-based peridynamic formulation is developed
for functionally graded Euler-Bernoulli beams. The equation of motion is
developed by using Lagrange’s equation and Taylor series. Both axial and transverse displacements are taken into account as degrees of freedom. Four different
boundary conditions are considered including pinned support-roller support,
pinned support-pinned support, clamped-clamped and clamped-free. Peridynamic results are compared against finite element analysis results for transverse
and axial deformations and a very good agreement is observed for all different
types of boundary conditions. More >
Open Access
ARTICLE
Tao Zhang, Jinglan Deng*, Jihui Wang
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 545-559, 2020, DOI:10.32604/cmes.2020.09536
Abstract The out-of-plane fold is a common defect of composite materials during
the manufacturing process and will greatly affect the compressive strength as well
as the service life. Making it of great importance to investigate the influence of
out-of-plane defects to the compressive strength of laminate plates of composite
materials, and to understand the patterns of defect evolution. Therefore, the strip
method is applied in this article to create out-of-plane defects with different aspect
ratios in laminated plates of composite materials, and a compressive performance
test is conducted to quantify the influence of out-of-plane defects. The result
shows that the compressive… More >
Open Access
ARTICLE
Chengwen Liu1,*, Lin Zhu1, Xingru Wu2,*, Jian Liang1, Zhaomin Li1
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 561-572, 2020, DOI:10.32604/cmes.2020.010699
Abstract In drilling a deepwater well, the mud density window is narrow, which
needs a precise pressure control to drill the well to its designed depth. Therefore,
an accurate characterization of annular flow between the drilling riser and drilling
string is critical in well control and drilling safety. Many other factors influencing
the change of drilling pressure that should be but have not been studied suffi-
ciently. We used numerical method to simulate the process of drill string rotation
and vibration in the riser to show that the rotation and transverse vibration of drill
string can increase the axial velocity in… More >
Open Access
ARTICLE
Tao Zheng, Yan Chang, Shibin Zhang*
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 573-584, 2020, DOI:10.32604/cmes.2020.010445
Abstract With the acceleration of the construction of quantum communication
networks, scholars have proposed different quantum communication protocols
for different application scenarios. However, few scholars pay attention to the risk
assessment process before communication. In this paper, we propose a novel
quantum risk assessment model based on quantum teleportation technology with
two three-qubit GHZ states. Only by using Bell states measurements (BSMs) and
two-qubit projective measurements (PJMs), the communicators can recovery any
arbitrary two-qubit state. This protocol can transmit two-dimension risk assessment factors with better security performance. On the one hand, more sufficient
evaluation factors allow the two communicating parties to… More >
Open Access
ARTICLE
Shige Wang1, Zhongwang Wang1, Leilei Chen1, Haojie Lian2,3,*, Xuan Peng4, Haibo Chen5
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 585-604, 2020, DOI:10.32604/cmes.2020.09904
（This article belongs to this Special Issue: Recent Developments of Isogeometric Analysis and its Applications in Structural Optimization)
Abstract The paper applied the isogeometric boundary element method (IGABEM) to thermoelastic problems. The Non-Uniform Rational B-splines (NURBS)
used to construct geometric models are employed to discretize the boundary integral formulation of the governing equation. Due to the existence of thermal stress,
the domain integral term appears in the boundary integral equation. We resolve
this problem by incorporating radial integration method into IGABEM which
converts the domain integral to the boundary integral. In this way, IGABEM
can maintain its advantages in dimensionality reduction and more importantly,
seamless integration of CAD and numerical analysis based on boundary representation. The algorithm is verified… More >
Open Access
ARTICLE
Yang Xia*, Luting Deng, Jian Zhao
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 605-626, 2020, DOI:10.32604/cmes.2020.010204
（This article belongs to this Special Issue: Recent Developments of Isogeometric Analysis and its Applications in Structural Optimization)
Abstract Geometric fitting based on discrete points to establish curve structures
is an important problem in numerical modeling. The purpose of this paper is to
investigate the geometric fitting method for curved beam structure from points,
and to get high-quality parametric model for isogeometric analysis. A Timoshenko
beam element is established for an initially curved spacial beam with arbitrary
curvature. The approximation and interpolation methods to get parametric models
of curves from given points are examined, and three strategies of parameterization, meaning the equally spaced method, the chord length method and the centripetal method are considered. The influences of the different… More >
Open Access
ARTICLE
Jinlan Xu*, Ningning Sun, Gang Xu
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 627-642, 2020, DOI:10.32604/cmes.2020.010341
（This article belongs to this Special Issue: Recent Developments of Isogeometric Analysis and its Applications in Structural Optimization)
Abstract This paper presents a novel approximating method to construct highprecision single-patch representation of B-spline surface from a multi-patch representation for isogeometric applications. In isogeometric analysis, multi-patch structure
is not easy to achieve high continuity between neighboring patches which will reduce
the advantage of isogeometric analysis in a sense. The proposed method can achieve
high continuity at surface stitching region with low geometric error, and this technique exploits constructing the approximate surface with several control points are
from original surfaces, which guarantees the local feature of the surface can be
well-preserved with high precision. With the proposed approximating method,
isogeometric analysis… More >
Open Access
ARTICLE
Yalei Wang1, Jinming Xu1,2,*, Mostafa Asadizadeh3, Chuanjiang Zhong4, Xuejie Tao1
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 643-664, 2020, DOI:10.32604/cmes.2020.09866
（This article belongs to this Special Issue: Machine Learning based Methods for Mechanics)
Abstract Granite is generally composed of quartz, biotite, feldspar, and cracks.
The changes in digital parameters of these compositions reflect the detail of the
deformation process of the rock. Therefore, the estimation of the changes in digital parameters of the compositions is much helpful to understand the deformation
and failure stages of the rock. In the current study, after dividing the frames in the
video images photographed during the axial compression test into four parts (or,
the upper left, upper right, lower left, and lower right ones), the digital parameters
of various compositions in each part were then extracted. Using these… More >
Open Access
ARTICLE
M. F. Elettreby1, 2, *, Ali S. Alqahtani1, E. Ahmed2
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 665-682, 2020, DOI:10.32604/cmes.2020.09194
（This article belongs to this Special Issue: Data Science and Modeling in Biology, Health, and Medicine)
Abstract Drug resistance is one of the most serious phenomena in financial, economic and
medical terms. The present paper proposes and investigates a simple mathematical
fractional-order model for the phenomenon of multi-drug antimicrobial resistance. The
model describes the dynamics of the susceptible and three kinds of infected populations.
The first class of the infected society responds to the first antimicrobial drug but resists
to the second one. The second infected individuals react to the second antimicrobial drug
but resist to the first one. The third class shows resistance to both of the two drugs. We
formulate the model and associate it… More >
Open Access
ARTICLE
Mohamed Abbas1,3,*, Ali Algahtani2,6, Amir Kessentini2,4,7, Hassen Loukil1,5, Muneer Parayangat1, Thafasal Ijyas1, Abdul Wase Mohammed1
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 683-701, 2020, DOI:10.32604/cmes.2020.010304
（This article belongs to this Special Issue: Data Science and Modeling in Biology, Health, and Medicine)
Abstract Every new generation of antennas is characterized by increased accuracy and faster transmission speeds. However, patch antennas have been known
to damage human health. This type of antenna sends out electromagnetic waves
that increase the temperature of the human head and prevent nerve strands from
functioning properly. This paper examines the effect of the communication
between the patch antenna and the brain on the head’s temperature by developing
a hypothetical multi-input model that achieves more accurate results. These inputs
are an individual’s blood and tissue, and the emission power of the antenna. These
forces depend on the permeability and conductivity… More >
Open Access
ARTICLE
Zhaohui Xia1,2, Zhihao He2, Qifu Wang1, Yingjun Wang2,*
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 703-720, 2020, DOI:10.32604/cmes.2020.010368
（This article belongs to this Special Issue: Design & simulation in Additive Manufacturing)
Abstract Additive manufacturing (AM), adding materials layer by layer, can be
used to produce objects of almost any shape or geometry. However, AM techniques cannot accurately build parts with large overhangs, especially for the large
features close to horizontal, hanging over the void. The overhangs will make
the manufactured model deviate from the design model, which will result in
the performance of the manufactured model that cannot satisfy the design requirements. In this paper, we will propose a new finite element (FE) analysis model
that includes the manufacturing errors by mimicking the AM layer by layer construction process. In such FE… More >
Open Access
ARTICLE
Xintao Duan1, *, Daidou Guo1, Chuan Qin2
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 721-745, 2020, DOI:10.32604/cmes.2020.09463
（This article belongs to this Special Issue: Information Hiding and Multimedia Security)
Abstract Image steganography is a technique that hides secret information into the cover
image to protect information security. The current image steganography is mainly to embed
a smaller secret image in an area such as a texture of a larger-sized cover image, which will
cause the size of the secret image to be much smaller than the cover image. Therefore, the
problem of small steganographic capacity needs to be solved urgently. This paper proposes
a steganography framework that combines image compression. In this framework, the Vector Quantized Variational AutoEncoder (VQ-VAE) is used to achieve the compression of
the secret image. The… More >
Open Access
ARTICLE
Fulian Yin, Yanyan Wang, Jianbo Liu*, Meiqi Ji
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 747-764, 2020, DOI:10.32604/cmes.2020.010579
（This article belongs to this Special Issue: Information Hiding and Multimedia Security)
Abstract Word similarity (WS) is a fundamental and critical task in natural language processing. Existing approaches to WS are mainly to calculate the similarity or relatedness of word pairs based on word embedding obtained by massive
and high-quality corpus. However, it may suffer from poor performance for insuf-
ficient corpus in some specific fields, and cannot capture rich semantic and sentimental information. To address these above problems, we propose an enhancing
embedding-based word similarity evaluation with character-word concepts and
synonyms knowledge, namely EWS-CS model, which can provide extra semantic
information to enhance word similarity evaluation. The core of our approach contains… More >
Open Access
ARTICLE
Hao Li1,2, Zhixia Wang1,2, Wei Wang1,2,*
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 765-782, 2020, DOI:10.32604/cmes.2020.010061
（This article belongs to this Special Issue: Novel Methods for Reliability Evaluation and Optimization of Complex Mechanical Structures)
Abstract Extracting nonlinear governing equations from noisy data is a central
challenge in the analysis of complicated nonlinear behaviors. Despite researchers
follow the sparse identification nonlinear dynamics algorithm (SINDy) rule to
restore nonlinear equations, there also exist obstacles. One is the excessive dependence on empirical parameters, which increases the difficulty of data pre-processing. Another one is the coexistence of multiple coefficient vectors, which causes
the optimal solution to be drowned in multiple solutions. The third one is the composition of basic function, which is exclusively applicable to specific equations. In
this article, a local sparse screening identification algorithm (LSSI) is proposed… More >
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