Open Access
ARTICLE
Mustafa Turkyilmazoglu1,2,*
CMES-Computer Modeling in Engineering & Sciences, Vol.127, No.1, pp. 1-22, 2021, DOI:10.32604/cmes.2021.012595
Abstract The present paper is devoted to the convergence control and accelerating the traditional Decomposition Method
of Adomian (ADM). By means of perturbing the initial or early terms of the Adomian iterates by adding a
parameterized term, containing an embedded parameter, new modified ADM is constructed. The optimal value of
this parameter is later determined via squared residual minimizing the error. The failure of the classical ADM is also
prevented by a suitable value of the embedded parameter, particularly beneficial for the Duan–Rach modification of
the ADM incorporating all the boundaries into the formulation. With the presented squared residual error analysis,… More >
Open Access
ARTICLE
Piyatida Phanthuna, Yupaporn Areepong*, Saowanit Sukparungsee
CMES-Computer Modeling in Engineering & Sciences, Vol.127, No.1, pp. 23-41, 2021, DOI:10.32604/cmes.2021.013810
Abstract A modified exponentially weighted moving average (EWMA) scheme is one of the quality control charts such that this control chart can quickly detect a small shift. The average run length (ARL) is frequently used for the performance evaluation on control charts. This paper proposes the explicit formula for evaluating the average run length on a two-sided modified exponentially weighted moving average chart under the observations of a first-order autoregressive process, referred to as AR(1) process, with an exponential white noise. The performance comparison of the explicit formula and the numerical integral technique is carried out using the absolute relative change… More >
Open Access
ARTICLE
Fusheng Qiu1,*, Hongliang Liu1,*, Hongjuan Zhao2
CMES-Computer Modeling in Engineering & Sciences, Vol.127, No.1, pp. 43-57, 2021, DOI:10.32604/cmes.2021.014530
Abstract This paper presents a feature modeling approach to address the 3D structural topology design optimization with feature constraints. In the proposed algorithm, various features are formed into searchable shape features by the feature modeling technology, and the models of feature elements are established. The feature elements that meet the design requirements are found by employing a feature matching technology, and the constraint factors combined with the pseudo density of elements are initialized according to the optimized feature elements. Then, through controlling the constraint factors and utilizing the optimization criterion method along with the filtering technology of independent mesh, the structural… More >
Open Access
ARTICLE
Hichem Guedri1,*, Abdullah Bajahzar2, Hafedh Belmabrouk3
CMES-Computer Modeling in Engineering & Sciences, Vol.127, No.1, pp. 59-77, 2021, DOI:10.32604/cmes.2021.013632
Abstract In recent years, the three dimensional reconstruction of vascular structures in the field of medical research has been extensively developed. Several studies describe the various numerical methods to numerical modeling of vascular structures in near-reality. However, the current approaches remain too expensive in terms of storage capacity. Therefore, it is necessary to find the right balance between the relevance of information and storage space. This article adopts two sets of human retinal blood vessel data in 3D to proceed with data reduction in the first part and then via 3D fractal reconstruction, recreate them in a second part. The results… More >
Open Access
ARTICLE
Tantan Zhu1, Da Huang2,3,*, Jianxun Chen1, Yanbin Luo1, Longfei Xu1
CMES-Computer Modeling in Engineering & Sciences, Vol.127, No.1, pp. 79-97, 2021, DOI:10.32604/cmes.2021.014808
Abstract Excavation and earth surface processes (e.g., river incision) always induce the unloading of stress, which can
cause the failure of rocks. To study the shear mechanical behavior of a rock sample under unloading normal
stress conditions, a new stress path for direct shear tests was proposed to model the unloading of stress caused
by excavation and other processes. The effects of the initial stresses (i.e., the normal stress and shear stress before
unloading) on the shear behavior and energy conversion were investigated using laboratory tests and numerical
simulations. The shear strength of a rock under constant stress or under unloading… More >
Open Access
ARTICLE
Mohammed Lafi1,*, Bilal Hawashin2, Shadi AlZu’ bi3
CMES-Computer Modeling in Engineering & Sciences, Vol.127, No.1, pp. 99-116, 2021, DOI:10.32604/cmes.2021.013026
Abstract Most software systems have different stakeholders with a variety of concerns. The process of collecting requirements
from a large number of stakeholders is vital but challenging. We propose an efficient, automatic approach to
collecting requirements from different stakeholders’ responses to a specific question. We use natural language
processing techniques to get the stakeholder response that represents most other stakeholders’ responses. This study
improves existing practices in three ways: Firstly, it reduces the human effort needed to collect the requirements;
secondly, it reduces the time required to carry out this task with a large number of stakeholders; thirdly, it underlines
the… More >
Open Access
ARTICLE
Xiaorui Zhang1,2,*, Jiali Duan1, Wei Sun2, Tong Xu1, Sunil Kumar Jha3
CMES-Computer Modeling in Engineering & Sciences, Vol.127, No.1, pp. 117-133, 2021, DOI:10.32604/cmes.2021.012034
Abstract The cutting simulation of soft tissue is important in virtual surgery. It includes three major challenges in computation: Soft tissue simulation, collision detection, and handling, as well as soft tissue models. In order to address
the earlier challenges, we propose a virtual cutting system based on the mass-spring model. In this system, MSM
is utilized to simulate the soft tissue model. Residual stress is introduced to the model for simulating the shrinking
effect of soft tissue in cutting. Second, a cylinder-based collision detection method is used to supervise the collision
between surgical tools and soft tissue. Third, we simulate the… More >
Open Access
ARTICLE
Chunlei Zhang1,2,3,*, Y. P. Chugh2, Ruimin Feng4, Yong Zhang5, Wei Shen1, Jingke Wu1, Yushun Yang1
CMES-Computer Modeling in Engineering & Sciences, Vol.127, No.1, pp. 135-157, 2021, DOI:10.32604/cmes.2021.014665
Abstract Extraction of a protective coal seam (PVCS)-below or above a coal seam to be mined with the potential of coal and
gas outburst risk-plays an important role not only in decreasing the stress field in the surrounding rock mass but also
in increasing the gas desorption capacity and gas flow permeability in the protected coal seam (PTCS). The PVCS
is mined to guarantee the safe mining of the PTCS. This study has numerically evaluated the stress redistribution
effects using FLAC3D model for a longwall face in Shanxi Province. The effects of mining depth, mining height and
inter-burden rock mass properties… More >
Open Access
ARTICLE
Caili Li1, Dalin Tang2,*,3, Jing Yao4,*, Christopher Baird5, Haoliang Sun6, Chanjuan Gong7, Luyao Ma6, Yanjuan Zhang4, Liang Wang2, Han Yu2, Chun Yang8, Yongfeng Shao6
CMES-Computer Modeling in Engineering & Sciences, Vol.127, No.1, pp. 159-174, 2021, DOI:10.32604/cmes.2021.014580
（This article belongs to this Special Issue: Computer Methods in Bio-mechanics and Biomedical Engineering)
Abstract Aortic valve replacement (AVR) remains a major treatment option for patients with severe aortic valve disease.
Clinical outcome of AVR is strongly dependent on implanted prosthetic valve size. Fluid-structure interaction
(FSI) aortic root models were constructed to investigate the effect of valve size on hemodynamics of the implanted
bioprosthetic valve and optimize the outcome of AVR surgery. FSI models with 4 sizes of bioprosthetic valves
(19 (No. 19), 21 (No. 21), 23 (No. 23) and 25 mm (No. 25)) were constructed. Left ventricle outflow track flow
data from one patient was collected and used as model flow conditions. Anisotropic Mooney–Rivlin… More >
Open Access
ARTICLE
Jilong Bian1,*, Jinfeng Li2
CMES-Computer Modeling in Engineering & Sciences, Vol.127, No.1, pp. 175-189, 2021, DOI:10.32604/cmes.2021.014635
（This article belongs to this Special Issue: Blockchain Security)
Abstract The stereo matching method based on a space-aware network is proposed, which divides the network into three sections: Basic layer, scale layer, and decision layer. This division is beneficial to integrate residue network and dense network into the space-aware network model. The vertical splitting method for computing matching cost by using the space-aware network is proposed for solving the limitation of GPU RAM. Moreover, a hybrid loss is brought forward to boost the performance of the proposed deep network. In the proposed stereo matching method, the space-aware network is used to calculate the matching cost and then cross-based cost aggregation… More >
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