scholarly journals 3-D Simulation of Double-Bar Plush Fabrics with Jacquard Patterns

2018 ◽  
Vol 18 (3) ◽  
pp. 243-250
Author(s):  
Aijun Zhang ◽  
Xinxin Li ◽  
Gaoming Jiang ◽  
Zhijia Dong ◽  
Honglian Cong
Keyword(s):  
Development Process ◽  
Model Simulation ◽  
Simulation Method ◽  
Simulation Approach ◽  
High Quality ◽  
Time Saving ◽  
Perlin Noise ◽  
Geometry Shader ◽  
Simulation Results ◽  
Computerized Simulation

Abstract A realistic computerized simulation of double-bar plush fabrics can result in a time-saving development process with high quality. Based on basic analysis of jacquard principles, a fast 3-D simulation method of warp-knitted plush fabrics is proposed by using a geometry shader on GPU. Firstly, pile areas and non-pile areas are identified according to the jacquard design graphs and chain notations. According to the directions of observation and raised pile, two layered chips are formed in the geometry shader with an approach of multi-layered textures. To ensure that the simulated piles resemble the real ones, the directions of the piles are randomized with the Perlin noise method. One pile is generated along its length with numerous layers in the plush fabric model. Simulation results of piles on both the technical face and technical back are obtained via the model built above, which is confirmed with practicability and efficiency. This 3D simulation approach improves the visualization appearance of piles just as they are actually raised.

A Simulation Method for Memristor Based Dopant Drift Model

2012 ◽  
Vol 239-240 ◽  
pp. 915-920
Author(s):  
Jie Tao Diao ◽  
Xiao Bo Tian
Keyword(s):  
Numerical Simulation ◽  
Physical Model ◽  
Model Simulation ◽  
Simulation Method ◽  
Circuit Element ◽  
Nano Scale ◽  
Drift Model ◽  
Numerical Simulation Method ◽  
Simulation Results

Memristor is a kind of circuit element with nano scale, its appearance may radically change the traditional circuit. Recently, dopant drift model is a hot issue in research works connected to memristor. However, because of lack of transparency in the process of simulation, simulation method on dopant drift model of memristor needs to be strengthened. Dopant drift model was analyzed, circuit characteristics and relations between different circuit variables were studied. Based on those works above, a kind of numerical simulation method was designed to simulate and validate the memristor model. Simulation results show that the method designed accurately expresses conducting behaviour of memristor physical model, which provides a new feasible way for simulations of memristor model.

Permanent Magnet Biased Bearing of Suspension System

2011 ◽  
Vol 383-390 ◽  
pp. 5529-5535
Author(s):  
Ming Zong ◽  
Xiao Kang Wang ◽  
Yang Cao
Keyword(s):  
Magnetic Field ◽  
Mathematical Model ◽  
Permanent Magnet ◽  
Power Amplifier ◽  
Model Simulation ◽  
Simulation Method ◽  
Magnetic Bearing ◽  
Magnetic Bearings ◽  
Active Magnetic Bearing ◽  
Simulation Results

PM (Permanent Magnet) biased magnetic bearing with PM to replace the magnetic field produced by electromagnet an Active Magnetic Bearing generated static bias magnetic field, it can reduce the power consumption of power amplifier to reduce the number of turns of magnet safety, reduce the volume of magnetic bearings, reducing electromagnetic coil operating current, thereby reducing the power amplifier power control system and heat sink size, magnetic bearings significantly reduce power loss, and fundamentally reduce the cost of bearing. In this paper, a kind of PM biased magnetic bearings, describes its structure and working principle, derived a mathematical model of magnetic bearing and magnetic circuit of PM biased magnetic bearings are calculated, given the specific PM biased magnetic bearing size and accordingly calculate the parameters of magnetic bearings. A magnetic model constructed using Simulink simulation method, and constructed using this method, magnetic bearing specific mathematical model simulation results show that the rotor position in the balance, X and Y decoupling between the control winding, while the deviation from equilibrium position time, X and Y control coupling between the windings, the simulation results and the calculation results.

Acoustical Investigations in Virtual Environments for a Car Passing Application

2014 ◽  
Author(s):  
Stephan Husung ◽  
Antje Siegel ◽  
Christian Weber
Keyword(s):  
Product Development ◽  
Virtual Environments ◽  
Development Process ◽  
Product Development Process ◽  
High Quality ◽  
Simulation Tools ◽  
Visual Models ◽  
State Dependent ◽  
Simulation Results

Product development is dominated by reducing time and costs, which is often contradictory to the required high quality of product properties. Therefore, the demand for efficient tools, which support the product development process, is rising. Virtual Reality (VR) can be used as such a tool. The interactive presentation of simulation results using (extended) VR technologies is very helpful — especially if both the simulation tools and the VR presentation are multimodal. Due to the increasing importance of acoustics and the expectation of an improving presence in VR environments the sense of perception should be extended. For this a special audio-visual VR-system and audio-visual models are necessary. For the current investigations a spatial, interactive auralisation-system is used. The main focus of the paper lies on the state dependent reproduction of the acoustical behavior using a real-time capable, network-based sound-server. The developed methods are explained in the paper by an automotive example.

scholarly journals Multi-Disciplinary Simulation of Piezoelectric Driven Microfluidic Inkjet

2009 ◽  
Author(s):  
Jun Zeng ◽  
Charles G. Schmidt ◽  
Hui Liu ◽  
Adel Jilani
Keyword(s):  
Simulation Method ◽  
High Fidelity ◽  
Simulation Approach ◽  
Graphic Arts ◽  
Reduced Order ◽  
Simulation Methodology ◽  
Detailed Simulation ◽  
Multi Level ◽  
Simulation Results ◽  
Manufacturing Applications

Piezoelectric inkjet technology is critical to documentation, graphic arts and manufacturing applications. Physical modeling plays an essential role in the development of this technology. In this paper, we present a comprehensive, multi-level, inter-disciplinary simulation approach for piezoelectric inkjet design. This includes a high-fidelity, inter-disciplinary detailed simulation method for architecture investigation, and a much faster reduced-order modeling approach that enables interactive design of voltage waveforms. Simulation results are compared with experimental data. The multi-level inter-disciplinary simulation methodology presented here can be applied to designing MEMS and microfluidic devices and systems [1].

Computerized simulation of shortened ingots with a controlled crystallization for manufacturing of high-quality forgings

2019 ◽  
Vol 103 (5-8) ◽  
pp. 3057-3065 ◽  
Author(s):  
Oleg E. Markov ◽  
Oleksiy V. Gerasimenko ◽  
Alexander A. Shapoval ◽  
Oleksandr R. Abdulov ◽  
Roman U. Zhytnikov
Keyword(s):  
High Quality ◽  
Controlled Crystallization ◽  
Computerized Simulation

Stochastic simulation for determining the design flood of cascade reservoir systems

2012 ◽  
Vol 43 (1-2) ◽  
pp. 54-63 ◽  
Author(s):  
Baohong Lu ◽  
Huanghe Gu ◽  
Ziyin Xie ◽  
Jiufu Liu ◽  
Lejun Ma ◽  
...  
Keyword(s):  
Simulation Model ◽  
Stochastic Simulation ◽  
Southern China ◽  
Flow Simulation ◽  
Simulation Method ◽  
Simulation Approach ◽  
Design Flood ◽  
Design Values ◽  
Stochastic Simulation Model ◽  
The Impact

Stochastic simulation is widely applied for estimating the design flood of various hydrosystems. The design flood at a reservoir site should consider the impact of upstream reservoirs, along with any development of hydropower. This paper investigates and applies a stochastic simulation approach for determining the design flood of a complex cascade of reservoirs in the Longtan watershed, southern China. The magnitude of the design flood when the impact of the upstream reservoirs is considered is less than that without considering them. In particular, the stochastic simulation model takes into account both systematic and historical flood records. As the reliability of the frequency analysis increases with more representative samples, it is desirable to incorporate historical flood records, if available, into the stochastic simulation model. This study shows that the design values from the stochastic simulation method with historical flood records are higher than those without historical flood records. The paper demonstrates the advantages of adopting a stochastic flow simulation approach to address design-flood-related issues for a complex cascade reservoir system.

Study of HVDC System and Subsynchronous Oscillation

2015 ◽  
Vol 1092-1093 ◽  
pp. 356-361
Author(s):  
Peng Fei Zhang ◽  
Lian Guang Liu
Keyword(s):  
Power Plant ◽  
Time Domain ◽  
Simulation Method ◽  
Time Domain Simulation ◽  
Stable Convergence ◽  
Turbine Generator ◽  
Plant Model ◽  
Subsynchronous Oscillation ◽  
Hvdc System ◽  
Simulation Results

With the application and development of Power Electronics, HVDC is applied more widely China. However, HVDC system has the possibilities to cause subsynchronous torsional vibration interaction with turbine generator shaft mechanical system. This paper simply introduces the mechanism, analytical methods and suppression measures of subsynchronous oscillation. Then it establishes a power plant model in islanding model using PSCAD, and analyzes the effects of the number and output of generators to SSO, and verifies the effect of SEDC and SSDC using time-domain simulation method. Simulation results show that the more number and output of generators is detrimental to the stable convergence of subsynchronous oscillation, and SEDC、SSDC can restrain unstable SSO, avoid divergence of SSO, ensure the generators and system operate safely and stably

Regression Testing-Based Requirement Prioritization of Mobile Applications

2012 ◽  
Vol 3 (4) ◽  
pp. 20-39 ◽  
Author(s):  
Varun Gupta ◽  
D. S. Chauhan ◽  
Kamlesh Dutta
Keyword(s):  
Mobile Applications ◽  
Development Process ◽  
Regression Testing ◽  
Test Cases ◽  
Application Development ◽  
High Quality ◽  
Ripple Effects ◽  
Software Application ◽  
Mobile Software ◽  
Requirement Prioritization

Mobile software application development process must be matured enough to handle the challenges (especially market related) associated with the development of high quality mobile software development. Ever increasing number of both mobile users and mobile applications had presented software engineers with the challenge of satisfying billions of users with high quality software applications to be delivered within deadline and budgets. Always there had been a lot of pressure to develop complex software categorized by thousands of requirements, under resource constrained environment. Requirement prioritization is one of the activities undertaken by software engineer to deliver partial software product to its customers such that most important requirements are implemented in the earliest releases. During next releases some changed and pending requirements are implemented, an activity that generates ripple effects. Such ripple effects need to be tested by executing modified source code against test cases of previous releases (regression testing). Regression testing is a very effortful activity that requires a software tester to select test cases that have high fault detection capability, execute the modified code against selected test cases and performing debugging. This regression testing activity can be lowered to the maximum extend by considering dependencies between requirements during the time of requirement prioritization. Thus requirement prioritization will be carried out not only against aspects like cost, time, risks, business values etc but against dependencies also. The aim is to implement almost all dependent highest priority requirements in current release so that implementation of new requirements is unlikely to have ripple effects. Changes in requirements might not be related to variable usage and definition and might not involve a change in functionality. In such cases there is no need to select already executed test cases of previous versions. Module dependencies can lead to test case selections of previous versions if changes of requirement lead to ripple effects. This paper aims to implement highest priority requirements such that regression testing is performed to minimum thereby improving development process of mobile applications. The proposed technique had been successfully evaluated on Android based notification software application that meets the specification of Aakash tablets.

Investigation on penetration model of shaped charge jet in water

2016 ◽  
Vol 30 (02) ◽  
pp. 1550268 ◽  
Author(s):  
Jinwei Shi ◽  
Xingbai Luo ◽  
Jinming Li ◽  
Jianwei Jiang
Keyword(s):  
Numerical Simulation ◽  
Theoretical Model ◽  
Model Simulation ◽  
Theoretical Models ◽  
Theoretical Research ◽  
Water Medium ◽  
Simulation Results ◽  
Jet Penetration ◽  
The Impact ◽  
Penetration Velocity

To analyze the process of jet penetration in water medium quantitatively, the properties of jet penetration spaced target with water interlayer were studied through test and numerical simulation. Two theoretical models of jet penetration in water were proposed. The theoretical model 1 was established considering the impact of the shock wave, combined with the shock equation Rankine–Hugoniot and the virtual origin calculation method. The theoretical model 2 was obtained by fitting theoretical analysis and numerical simulation results. The effectiveness and universality of the two theoretical models were compared through the numerical simulation results. Both the models can reflect the relationship between the penetration velocity and the penetration distance in water well, and both the deviation and stability of theoretical model 1 are better than 2, the lower penetration velocity, and the larger deviation of the theoretical model 2. Therefore, the theoretical model 1 can reflect the properties of jet penetration in water effectively, and provide the reference of model simulation and theoretical research.

scholarly journals Eden Model Simulation of Re-Epithelialization and Angiogenesis of an Epidermal Wound

Processes ◽  
2018 ◽  
Vol 6 (11) ◽  
pp. 207
Author(s):  
Ephraim Agyingi ◽  
Luke Wakabayashi ◽  
Tamas Wiandt ◽  
Sophia Maggelakis
Keyword(s):  
Model Simulation ◽  
Cutaneous Wound Healing ◽  
Epidermal Stem Cells ◽  
Wound Edge ◽  
Wound Area ◽  
Cutaneous Wound ◽  
Simulation Results ◽  
Eden Model ◽  
And Migration ◽  
Proliferation And Migration

Among the vital processes of cutaneous wound healing are epithelialization and angiogenesis. The former leads to the successful closure of the wound while the latter ensures that nutrients are delivered to the wound region during and after healing is completed. These processes are regulated by various cytokines and growth factors that subtend their proliferation and migration into the wound region until full healing is attained. Wound epithelialization can be enhanced by the administration of epidermal stem cells (ESC) or impaired by the presence of an infection. This paper uses the Eden model of a growing cluster to independently simulate the processes of epithelialization and angiogenesis in a cutaneous wound for different geometries. Further, simulations illustrating bacterial infection are provided. Our simulation results demonstrate contraction and closure for any wound geometry due to a collective migration of epidermal cells from the wound edge in fractal form and the diffusion of capillary sprouts with the laying down of capillary blocks behind moving tips into the wound area.

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