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Distribution-free learning theory for approximating submanifolds from reptile motion capture data

computational MECHANICS 2021年第2期68卷 337-356页

作者： Powell, Nathan Kurdila, Andrew J. Virginia Tech Dept Mech Engn Blacksburg VA 24060 USA

This paper describes the formulation and experimental testing of an estimation of submanifold models of animal motion. It is assumed that the animal motion is supported on a configuration manifold, Q, and that the manifold is homeomorphic to a known smooth, Riemannian manifold, S. Estimation of the configuration submanifold is achieved by finding an unknown mapping, gamma, from S to Q. The overall problem is cast as a distribution-free learning problem over the manifold of measurements. This paper defines sufficient conditions that show that the rates of convergence in L-mu(2)(S) of approximations of gamma correspond to those known for classical distribution-free learning theory over Euclidean space. This paper concludes with a study and discussion of the performance of the proposed method using samples from recent reptile motion studies.

关键词： Theoretical and Applied Mechanics computational science and engineering Classical and Continuum Physics

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Compressible and nonisothermal viscoelastic flow between eccentrically rotating cylinders

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THEORETICAL AND computational FLUID DYNAMICS 2021年第5期35卷 731-756页

作者： Mackay, A. T. Phillips, T. N. Cardiff Univ Sch Math Cardiff CF24 4AG Wales

A Taylor-Galerkin finite element time marching scheme is derived to numerically simulate the flow of a compressible and nonisothermal viscoelastic liquid between eccentrically rotating cylinders. Numerical approximations to the governing flow and constitutive equations are computed over a custom refined unstructured grid of piecewise linear Galerkin finite elements. An original extension to the DEVSS formulation for compressible fluids is introduced to stabilise solutions of the discrete problem. The predictions of two models: the extended White-Metzner and FENE-P-MP are presented. Comparisons between the torque and load bearing capacity predicted by both models are made over a range of viscoelastic parameters. The results highlight the significant and interacting effects of elasticity and compressibility on journal torque and resultant load, and the stability of the journal bearing system.

关键词： engineering Fluid Dynamics Classical and Continuum Physics computational science and engineering

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Special issue on computational intelligence-based modeling, control and estimation in modern mechatronic systems

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NEURAL COMPUTING & APPLICATIONS 2022年第7期34卷 5011-5013页

作者： Wang, Hai Zheng, Jinchuan Lu, Yuqian Ding, Shihong Chaoui, Hicham Murdoch Univ Ctr Water Energy Waste Discipline Engn & Energy Harry Butler Inst Perth WA 6150 Australia Swinburne Univ Technol Fac Sci Engn & Technol Melbourne Vic 3122 Australia Univ Auckland Dept Mech Engn Auckland 1010 New Zealand Jiangsu Univ Sch Elect & Informat Engn Zhenjiang 212013 Jiangsu Peoples R China Carleton Univ Dept Elect Ottawa ON Canada

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Lift on Janus and stick spheres in laminar channel flow: a computational study

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THEORETICAL AND computational FLUID DYNAMICS 2021年第5期35卷 659-682页

作者： Dhiman, Manish Gupta, Raghvendra Reddy, K. Anki Indian Inst Technol Guwahati Dept Chem Engn Gauhati 781039 Assam India

The instantaneous motion of a spherical particle in a channel flow is governed by the forces experienced by the particle. The magnitude and direction of the forces depend on the particle to channel size ratio, particle position, nature of the sphere surface (sticky/slippery), fluid properties and relative velocity between the fluid and the particle. In this work, we report the lift, the force component directed normal to the streamwise direction, on two classes of spheres, sticky and Janus, in a channel of square cross-section. The Janus spheres considered have both sticky and slippery hemispheres with the boundary between the two hemispheres parallel to the channel midplane. The effect of particle to channel size ratio, dimensionless particle position and particle Reynolds number on the lift are studied. The Janus sphere placed at the channel centerline is observed to experience the lift directed from the sticky to the slippery hemisphere. A correlation is proposed to predict the lift on the Janus sphere placed at the centerline of the channel. A sticky sphere positioned close to the channel wall experiences a significant lift directed away from it. For the Janus sphere placed at an off-center position two possibilities arise-slippery hemisphere facing the channel centerline (case A) or sticky hemisphere facing the channel centerline (case B). For case A, the lift is always directed away from the wall. For case B, the direction of lift depends on the particle position as well as particle Reynolds number. The moment coefficients for the sticky and Janus sphere are also presented.

关键词： engineering Fluid Dynamics Classical and Continuum Physics computational science and engineering

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First experiences with group projects in CSE education

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COMPUTING IN science & engineering 2006年第4期8卷 16-25页

作者： Bernreuther, M Bungartz, HJ Univ Stuttgart IPVS SgS Stuttgart Germany Tech Univ Munich D-8000 Munich Germany

In an effort to improve the way in which computational science and engineering is taught, the authors worked on two project-based software-focused modules in two different study programs at two German universities. This article describes both their expectations and outcomes and addresses the question of whether-and how-software engineering practices should be taught in CSE courses.

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Building CLiiME via Test-Driven Development: A Case Study

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COMPUTING IN science & engineering 2014年第3期16卷 36-46页

作者： Nanthaamornphong, Aziz Carver, Jeffrey C. Morris, Karla Michelsen, Hope A. Rouson, Damian W. I. Univ Alabama Dept Comp Sci Tuscaloosa AL 35487 USA Sandia Natl Labs Livermore CA 94550 USA Sandia Natl Labs Reacting Flow Res Dept Livermore CA 94550 USA Sandia Natl Labs Combust Res Facil Livermore CA 94550 USA Stanford Univ Stanford CA 94305 USA

The Community Laser-Induced Incandescence Modeling Environment (CLiiME) project used the agile approaches of test-driven development and refactoring to implement a collaborative model infrastructure for its researchers to use, modify, and extend. As the project's results show, using agile methods can offer several benefits for software development in the CSE community.

关键词： agile methodologies computational science and engineering scientific computing software engineering test-driven development

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Temporality-based user interface design approaches for desktop and small screen environment

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INTERNATIONAL JOURNAL OF computational science and engineering 2012年第1期7卷 52-64页

作者： Swamy, M. Kumara Reddy, P. Krishna Kiran, R. Uday Reddy, M. Venugopal Int Indian Inst Technol Ctr Data Engn Hyderabad 500032 Andhra Pradesh India

User interface (UI) forms are used to enter data in information systems. The improper UI increases navigational burden, data entry errors and reduces the efficiency of the user. Further, in small screen environments, it is difficult to display full interface on a single screen due to the limitation of small screen. Research efforts are going on to investigate the improved user interface methods for desktop and small screen environments. Normally, context-based approach is followed to design user interfaces. In this approach, the input attributes are divided into several contexts based on certain criteria and UI form is designed for each context. We have exploited the fact that several attributes in the UI form may not receive values only during certain time period. We term this as 'temporality' property of an attribute. In this paper, we propose a methodology to improve UI for desktop environments by exploiting the notion of 'temporality' property of attribute. Further, we also propose an improved UI design methodology by extending notion of temporality to interface tailoring methods for small screens. The experiment results on a real dataset show that the proposed method improves the performance as compared to existing approaches.

关键词： temporality form-based user interfaces context-aware computing context-based approach CA interface tailoring mobile interface forms small screens navigational burden computational science and engineering user interfaces UIs

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Evaluating clustering quality using features salience: a promising approach

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NEURAL COMPUTING & APPLICATIONS 2021年第19期33卷 12939-12956页

作者： Dugue, Nicolas Lamirel, Jean-Charles Chen, Yue Univ Maine LIUM Lab Informat EA 4023 IC2Inst Informat Claude Chappe Ave Olivier Messiaen F-72000 Le Mans France LORIA Equipe Synalp Batiment B F-54506 Vandoeuvre Les Nancy France Dalian Univ Technol WiseLAB Dalian 116024 Liaoning Peoples R China

This paper focuses on using feature salience to evaluate the quality of a partition when dealing with hard clustering. It is based on the hypothesis that a good partition is an easy to label partition, i.e. a partition for which each cluster is made of salient features. This approach is mostly compared to usual approaches relying on distances between data, but also to more recent approaches based on entropy or stability. We show that our feature-based approach outperforms the compared indexes for optimal model selection: they are more efficient from low- to high-dimensional range as well as they are more robust to noise. To show the efficiency of our indexes on a real-life application, we consider the task of diachronic analysis on a textual dataset. We demonstrate that our approach allows to get some interesting and relevant results in that context, while other approaches mostly lead to unusable results.

关键词： Artificial Intelligence Data Mining and Knowledge Discovery Probability and Statistics in Computer science computational science and engineering Image Processing and Computer Vision computational Biology/Bioinformatics

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Announcing the New Computing in science & engineering Diversity and Inclusion Department

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COMPUTING IN science & engineering 2017年第6期19卷 79-81页

作者： Leung, Mary Ann Sustainable Horizons Inst Ames IA 50010 USA

CiSE announces the creation of a new diversity and inclusion department and the inaugural editor, Mary Ann Leung from Sustainable Horizons Institute. A brief review of the status of diversity in computing and science and engineering is presented as well as a call to the community to engage in the discussion and contribute articles and/or letters to the new department.

关键词： Diversity Inclusion computational science and engineering Scientific Computing

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Reproducible Research for Scientific Computing: Tools and Strategies for Changing the Culture

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COMPUTING IN science & engineering 2012年第4期14卷 13-17页

作者： LeVeque, Randall J. Mitchell, Ian M. Stodden, Victoria Univ Washington Seattle WA 98195 USA Univ British Columbia Vancouver BC V5Z 1M9 Canada Columbia Univ New York NY 10027 USA

This article considers the obstacles involved in creating reproducible computational research as well as some efforts and approaches to overcome them.

关键词： Natural sciences Computing Research And Development Cultural Change Reproducible computational Research Scientific Computing Hidden Markov Models Research And Development Scientific Computing computational Complexity Reproducibility Of Results Hidden Markov Models Research And Development Scientific Computing computational Complexity Reproducibility Of Results Scientific Computing Reproducible Research Data And Code Disclosure Reproducibility computational science and engineering

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