Ischemic mitral regurgitation (IMR) is manifested by the inability of the mitral valve (MV) to form a completed sealed shape, which is induced by rapidly impairing contractile function of acute myocardial infarction (...
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Attributing to multiple advantages such as lightweight and excellent impact resistance, plain-woven composite self-healing U-shaped canal material has been extensively applied in various fields. As it is used as the m...
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Attributing to multiple advantages such as lightweight and excellent impact resistance, plain-woven composite self-healing U-shaped canal material has been extensively applied in various fields. As it is used as the main bearing part, the existence of cracks can significantly reduce the service performance and safety factor of the material. During the usage, the internal cracks continue to expand and accelerate the material failure. In this paper, the features of four-step weaving technology are analyzed, and the yarn trajectory is simulated by the relevant computer software based on the simulation characteristics. The computer graphics technology is used to present the 3D weaving structure. The design and implementation process of composite self-healing U-shaped canal material based on the 3D modeling technology is simulated by the computer. Based on the relationship of the weaving process parameters, simulation parameters are set in the computer software to facilitate the generation of 3D weaving models for various sizes and simulation corners. This computersimulation method allows the model to approach the real structure of woven fabric infinitely, which has implemented the characterization for the damage evolution of plain woven glass fiber composite self-healing U-shaped canal material in the in-situ shear test. The geometric information of the yarn section is obtained by scanning the image, including the long and short axis in the elliptical section of the yarn and the yarn path. Spatial positioning is performed on the defects to obtain the material defect rate by statistical analysis of its volume fraction. Statistics on the geometric parameters of the yarn are performed to establish a finite element model. Given the impact of hole defects, the finite element model with defects is established. The corresponding numerical simulation of the shear test is conducted, and the impact of defects on material failure is analyzed and revealed from the aspects of modul
In actual network, the network is expected to have strong invulnerability based on the fixed physical topology structure. In the paper, based on the preferential attachment algorithms, we propose four different networ...
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ISBN:
(纸本)9781665406932
In actual network, the network is expected to have strong invulnerability based on the fixed physical topology structure. In the paper, based on the preferential attachment algorithms, we propose four different network model algorithms, and analyze their static topology index. Through simulations, we analyze the invulnerability of different networks using residual- connected component. The experimental results show that the modified network is smaller world than preferential attachment network with the equal network size. It is an efficient approach to improve the network invulnerability ability by optimizing the procedures of network modeling.
The analysis of quantitative hemodynamics and luminal pressure may add valuable information to aid treatment strategies and prognosis for aortic dissections. This work directly compared in vitro 4D-flow magnetic reson...
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3D rendering is a heavy task for virtual reality models in order to reduce the amount of work in this part. The paper describes the process of rendering using Twinmotion after modeling with 3Dmax modeling software, wh...
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作者：
Shorokhov, S.G.
6 Miklukho-Maklaya St Moscow117198 Russia
We study modeling of wireless channel with fading and shadowing effects using K distribution with modified Bessel function of the second kind with half integer order. This allows us to obtain probability density funct...
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Navigation science and technology has experienced the development process of mechanization, electrification, automation and informatization. The realization of intelligence and autonomy is also the goal of the shippin...
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ISBN:
(纸本)9781665435253
Navigation science and technology has experienced the development process of mechanization, electrification, automation and informatization. The realization of intelligence and autonomy is also the goal of the shipping industry. In recent years, with the rapid development of autonomous system, the application of autonomous technology in the field of transportation has aroused great interest in the industry. According to the working principle of cargo ship and relevant design specifications, this paper summarizes the modeling structure and requirements of the propulsion system, and establishes a simulation platform for the maneuverability of the propulsion system with three degrees of freedom motion based on MATLAB / Simulink simulation software.
The development of information technologies requires improvement of simulation methods and mathematical apparatus. The mathematical apparatus of Petri nets is used for simulation of parallel asynchronous systems and h...
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Aiming at the impact of social herd effect on the spread of network rumors, this paper starts from the user's local environment and uses Multi-Agent modeling technology in Anylogic simulation platform to model and...
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Validating and debugging conceptual models is a very time-consuming task. Though separate software tools for model validation and machine learning are available, their integration for an automated support of the debug...
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ISBN:
(纸本)9783030658472;9783030658465
Validating and debugging conceptual models is a very time-consuming task. Though separate software tools for model validation and machine learning are available, their integration for an automated support of the debugging-validation process still needs to be explored. The synergy between model validation for finding intended/unintended conceptual models instances and machine learning for suggesting repairs promises to be a fruitful relationship. This paper provides a preliminary description of a framework for an adequate automatic support to engineers and domain experts in the proper design of a conceptual model. By means of a running example, the analysis will focus on two main aspects: i) the process by which formal, tool-supported methods can be effectively used to generate negative and positive examples, given an input conceptual model;ii) the key role of a learning system in uncovering error-prone structures and suggesting conceptual modeling repairs.
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