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3rd International Conference on Manufacturing Science and Engineering (ICMSE 2012)

作者： Li, Ping Hefei Univ Technol Sch Mat Sci & Engn Hefei 230009 Peoples R China

ISBN: (纸本)9783037853719

In this study, a simulation model of deformed microstructure has been proposed on the basis of the initial microstructure obtained from normal grain growth simulation with Monte Carlo method. And simulation models of recrystallization microstructure of heterogeneous and simultaneous nucleation and random growth of nuclei have been developed in terms of the mechanism of microstructure evolution. On the basis of the simulated microstructure parameters distribution obtained by incorporating the neural network model into FEM Code, simulation and visualization of the microstructure of Ti-15-3 alloy during hot compression deformation and solution treatment have been realized. Comparison of the simulated results with the corresponding experimental ones indicates that the size and distribution of the simulated grains agree well with the actual ones. These studies lay scientific foundation for determining reasonable hot forming process.

关键词： nucleation and growth of grains microstructure simulation and visualization Monte Carlo

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vFirelib: A GPU-based fire simulation and visualization tool✩

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SOFTWAREX 2023年 23卷

作者： Wu, Rui Allison, Connor Scully Carthen, Chase Garcia, Andy Hoang, Roger Lewis, Christopher Quijada, Ronn Siedrik Smith, Jessica Dascalu, Sergiu M. Harris, Frederick C., Jr. East Carolina Univ Dept Comp Sci Greenville NC 27858 USA Univ Utah Sci Comp & Imaging Inst Salt Lake City UT USA Univ Nevada Dept Comp Sci & Engn Reno NV USA

Wildfires are a common and devastating event that impacts ecosystems and communities yearly. Fire experts rely on simulations to better understand how to mitigate the damage they cause and respond to live threats. Many available fire simulation tools and libraries do not produce simulation results fast enough to be used with multiple parameter sets during an active fire and are difficult to integrate with other applications. To address this gap, we propose a GPU-based fire simulation and visualization tool: vFirelib. Using a GPGPU (General Purpose Graphics Processing Unit) framework, we can parallelize the fire spread computations and achieve a 20X computation speedup over a sequential implementation of a fire spread using a widely used fire spread model. To facilitate the integration with other applications, we implemented a wrapper including RESTful APIs to provide fire simulation as a service. In this paper, two examples are illustrated how to simulate wildfire scenarios and visualize results: a web-based application, and a 3D virtual reality application. & COPY;2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://***/licenses/by/4.0/).

关键词： Wildfire GPU simulation and visualization

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From computer edit geometric design education to virtual worlds: Advantages and pitfalls of Computer-Based Education

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COMPUTER APPLICATIONS IN ENGINEERING EDUCATION 2018年第5期26卷 1614-1625页

作者： Kolmanic, Simon Kohek, Stefan Zalik, Borut Univ Maribor Fac Elect Engn & Comp Sci Koroska Cesta 46 SLO-2000 Maribor Slovenia

Nowadays, computers are an integral part of the education process in many fields and levels. Although numerous research has been done on Computer-Based Education (CBE), there are still open questions that have to be answered. Authors have faced some of those important questions over the years while developing the teaching applications from various areas. In this paper, those questions are presented, while the authors' approaches and obtained results offer some answers to those questions. The paper identifies the areas where special attention is needed in order to preserve the effectiveness of the applications in the teaching process. Practical examples of their work are used to demonstrate how the integration level of computers in the teaching process and teaching goals, along with other factors, can affect the effectiveness of teaching applications. With the comparison of the findings with other authors, some crude guidelines are given on how to achieve the best teaching results.

关键词： Computer-Based Education simulation and visualization teaching application development teaching effects

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A layer-based virtual prototyping system for product development

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COMPUTERS IN INDUSTRY 2003年第3期51卷 237-256页

作者： Choi, SH Chan, AMM Univ Hong Kong Dept Ind & Mfg Syst Engn Hong Kong Hong Kong Peoples R China

This paper proposes a layer-based virtual prototyping (VP) system, which builds virtual or digital prototypes to facilitate product development. The approach resembles the physical fabrication process of laminated sheet-based rapid prototyping (RP) systems. It simulates such an RP process to create a virtual prototype of a product design. Thus, the designer can perform design validation and accuracy analysis easily in a virtual environment as if using a physical prototype. In addition to numeric quantification of the RP process, the system provides vivid visualizations of the prototype for studying its characteristics. The prototype may also be superimposed on the original model, and the areas with dimensional errors beyond the design limits may be clearly highlighted for subsequent improvement. Hence, the designer can analyze and compare the surface texture point-by-point of the prototype with the product design. Furthermore, the virtual prototypes can also be transmitted via the Internet to customers to facilitate global manufacturing. As a result, both the lead-time and product development cost can be significantly reduced. (C) 2003 Elsevier Science B.V. All rights reserved.

关键词： virtual prototyping layer extrusion simulation and visualization

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Biomedical computing and visualization software environments

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COMMUNICATIONS OF THE ACM 2004年第11期47卷 64-71页

作者： Johnson, CR MacLeod, R Parker, SG Weinstein, D Univ Utah Sci Comp & Imaging Inst Natl Inst Hlth NCRR Bioelect Field Modeling Simul Salt Lake City UT 84112 USA Univ Utah Sch Comp Salt Lake City UT USA Univ Utah Cardiovasc Res & Training Inst Salt Lake City UT USA

Problem-solving environments and advanced visualization take on the complexity of biomedical computing, improving its utility to scientists and clinicians alike.

关键词： .dipole simulation and visualization scientific computing Problem-solving

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Printing out trees: Toward the design of tangible objects for education

Printing out trees: Toward the design of tangible objects fo...

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IASTED International Conference on Education and Technology

作者： Andersen, D Bennett, C Huynh, P Rassbach, L Reardon, S Eisenberg, M Univ Colorado Dept Comp Sci Boulder CO 80309 USA

ISBN: (纸本)088986487X

When educational technologists employ a term like "scientific visualization", what they usually mean is that scientific concepts or information are portrayed creatively on a two-dimensional screen. Increasingly, however, the advent of novel fabrication devices enables computers to "print out" physical objects that can themselves serve as models or representations of scientific concepts. This paper describes a working prototype of an educational application, entitled Growth, that enables users to print physical models of trees (and other botanical forms) with the aid of a 3D prototyping device. We describe the implementation of the program (and the mathematical theory of "L-systems" that underlies its biological content);and we show several examples of "printed-out trees" in plaster created with the software. The paper ends by arguing that Growth is an early instance of a style of educational software that is likely to burgeon in importance and variety during the coming decade.

关键词： computers and education three-dimensional printing simulation and visualization biological modeling L-systems

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Towards Insulin Monitoring: Infrequent Kalman Filter Estimates for Diabetes Management 21st

Towards Insulin Monitoring: Infrequent Kalman Filter Estimat...

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21st IFAC World Congress on Automatic Control - Meeting Societal Challenges

作者： Wolkowicz, Kelilah L. Deshpande, Sunil Doyle, Francis J., III Dassau, Eyal Harvard Univ Harvard John A Paulson Sch Engn & Appl Sci Cambridge MA 02138 USA

We propose a Kalman filter-based observer utilizing noisy remote compartment insulin measurements to estimate plasma insulin concentration. The design considers plant-model mismatch, sensor noise, as well as both uniform sampling intervals, mimicking infrequent continuous measurements, and non-uniform sampling intervals, mimicking infrequent on-demand measurements. The performance of the observer is demonstrated on ten in-silico subjects from the UVA/Padova simulator using real-life scenarios, including variability in sensor noise and variability in insulin pharmacokinetics. The proposed observer provides insight into the future use of insulin measurements for diabetes management. Copyright (C) 2020 The Authors.

关键词： Chronic care and/or diabetes Kalman filters State estimation Measurement noise Sampling intervals Biomedical system modeling simulation and visualization

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EcBot: Data-Driven Energy Consumption Open-Source MATLAB Library for Manipulators 21

EcBot: Data-Driven Energy Consumption Open-Source MATLAB Lib...

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21st International Conference on Advanced Robotics (ICAR)

作者： Heredia, Juan Schlette, Christian Kjaergaard, Mikkel Baun Univ Southern Denmark Maersk McKinney Moller Inst Odense Denmark

ISBN: (纸本)9798350342291

Existing literature proposes models for estimating the electrical power of manipulators, yet two primary limitations prevail. First, most models are predominantly tested using traditional industrial robots. Second, these models often lack accuracy. To address these issues, we introduce an open source Matlab-based library designed to automatically generate Energy Consumption (EC) models for manipulators. The necessary inputs for the library are Denavit-Hartenberg parameters, link masses, and centers of mass. Additionally, our model is data-driven and requires real operational data, including joint positions, velocities, accelerations, electrical power, and corresponding timestamps. We validated our methodology by testing on four lightweight robots sourced from three distinct manufacturers: Universal Robots, Franka Emika, and Kinova. The model underwent testing, and the results demonstrated an RMSE ranging from 1.42 W to 2.80 W for the training dataset and from 1.45 W to 5.25 W for the testing dataset.

关键词： simulation and visualization Industrial Robotics Energy Consumption Modeling.

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Real-time Bayesian Control of Reactive Brain Computer Interfaces 22

Real-time Bayesian Control of Reactive Brain Computer Interf...

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22nd World Congress of the International Federation of Automatic Control (IFAC)

作者： Tufvesson, Pex Nilsson, Martin Gemborn Soltesz, Kristian Bernhardsson, Bo Dept Automat Control Lund Sweden Ericsson Res Lund Sweden Lund Univ ELLIIT Excellence Ctr Lund Sweden

ISBN: (纸本)9781713872344

This paper introduces an improved method for real-time brain computer interface control. We demonstrate how Bayesian optimization and feedback can be used to achieve faster statistical convergence by controlling the sequence of stimuli shown in a brain computer interface based on a visual oddball paradigm. Copyright (c) 2023 The Authors.

关键词： Control in neuroscience Biomedical system modeling simulation and visualization Bayesian methods Parameter and state estimation Input and excitation design

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Multivariable Fuzzy Logic Controlled Photothermal Therapy 11th

Multivariable Fuzzy Logic Controlled Photothermal Therapy

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11th IFAC Symposium on Biological and Medical Systems (BMS)

作者： Tenorio, Mauricio Cespedes Dumani, Diego S. Univ Costa Rica Biomed Engn Res Lab Sch Elect Engn San Jose Costa Rica

Photothermal therapy has emerged as a potential modality to generate hyperthermia as cancer treatment due to its low invasiveness and its capacity to complement other cancer therapies. Undesired side effects can occur such as damage to surrounding healthy tissue and temperature increase to values that cause tissue carbonization and evaporation. For this reason, this research aims to develop a multivariable fuzzy logic controller that maximizes tumor thermal damage while keeping temperature within the recommended ranges and minimizing neighboring healthy tissue damage. Three inputs were contemplated for the control system: tumor thermal damage, future maximum temperature error and future healthy tissue temperature error;thirteen logic rules were used to determine the controller output, which was established to be the change in laser power. Results showed that the control algorithm successfully accomplished the proposed goals. Copyright (C) 2021 The Authors.

关键词： Decision support systems and feedback control intensive and chronic therapy biomedical system modelling hyperthermia photothermal therapy biomedical imaging systems simulation and visualization

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