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作者： Soumalya Ghosh Umesh Kumar Gupta Uttam Ghosh Sachin Shetty School of Computing Science and Engineering Galgotias University Greater Noida Uttar Pradesh India Department of Electrical Engineering & Computer Science Vanderbilt University Nashville TN USA Virginia Modeling Analysis and Simulation Center Old Dominion University Norfolk VA USA

ISBN: (数字)9781728101378

ISBN: (纸本)9781728101385

The hand-written text is subject to inconsistency and variability. To achieve the accuracy and consistency in recognizing handwritten characters, the present work discusses an efficient approach to segment the handwritten text into individual characters. In order to achieve this, the writing space is divided into three different zones and then the zones are subdivided tiny square shape grids, which are distributed evenly. After this, we analyze to find the presence of handwritten character in a selected grid by performing horizontal scanning method. Moreover, we propose an approach of segmenting the character set of a single line text by vertical scanning and curve pattern analysis on the touching zones of the selective grids. The efficacy of the approach has proven through rigorous testing on hand-written texts of both professional as well as non-professional users. The testing set consists of 106 text samples including both single line text phrases and short sentences. The proposed approach achieves around 100% accuracy for word level text segmentation on the handwritten texts of both professional and non-professional users. In addition, the average character level segmentation accuracy on texts written by professional and non-professional users are found to be 98.4% and 96.2% respectively. Thus, the average character level segmentation accuracy is improved by 97.3%.

关键词： Writing Connectors Pattern analysis Image segmentation Computational modeling Analytical models Shape

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Conceptual model of augmented reality use for improving the perception skills of seniors 4

Conceptual model of augmented reality use for improving the ...

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4th International Conference of the Virtual and Augmented Reality in Education, VARE 2018

作者： Ginters, Egils Puspurs, Martins Griscenko, Igors Dumburs, Davis Sociotechnical Systems Engineering Group Department of Modelling and Simulation Faculty of Computer Science and Information Technology Riga Technical University 2 Daugavgrivas Street RigaLV-1048 Latvia

ISBN: (纸本)9788885741218

If we believe in statistical data, unless skilled labour resources in EC will not be updated on migration, the problems expect pension beneficiaries' and other socially protected groups that are jointly supported by workers. It is important to be aware of the challenges that are expected and to keep skilled professionals in the labour market as long as possible, compensating for loss of job capacity and enabling skills development through the use of ICTE and the global area of information. The study aims at establishing a conceptual set of requirements for augmented reality (AR) applications for the preservation and development of older communications capabilities. The human physical body is aging with time, i.e. worsening memory, perception and functionality. Virtual and augmented reality (VR/AR) applications are associated with the first two elements: memory and perception. Data search and recall functions are associated with memory, but with sensory organs - vision, hearing, touch and taste. The article looks at, above all, vision and memory related issues. Today, there is a diverse, complex and poorly adaptable, as well as functionally limited but relatively expensive VR/AR equipment, whose sustainability is debatable. The analysis of the situations covered by the article makes it possible to design a conceptual model for the logical structure of the application, which is the justification for further selection of technical equipment and the construction of the physical structure of the socio-technical system. Copyright © (2015) by CAL-TEK *** rights reserved. . All Rights Reserved.

关键词： Augmented reality

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Differential evolution based on node strength

Differential evolution based on node strength

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作者： Skanderova, Lenka Fabian, Tomas Zelinka, Ivan Department of Computer Science Faculty of Electrical Engineering and Computer Science VSB – Technical University of Ostrava Ostrava Czech Republic Modeling Evolutionary Algorithms Simulation and Artificial Intelligence Faculty of Electrical and Electronics Engineering Ton Duc Thang University Ho Chi Minh Viet Nam

In this paper, three novel algorithms for optimisation based on the differential evolution algorithm are devised. The main idea behind those algorithms stems from the observation that differential evolution dynamics can be modelled via complex networks. In our approach, the individuals of the population are modelled by the nodes and the relationships between them by the directed lines of the graph. Subsequent analysis of non-trivial topological features further influence the process of parent selection in the mutation step and replace the traditional approach which is not reflecting the complex relationships between individuals in the population during evolution. This approach represents a general framework which can be applied to various kinds of differential evolution algorithms. We have incorporated this framework with the three well-performing variants of differential evolution algorithms to demonstrate the effectiveness of our contribution with respect to the convergence rate. Two well-known benchmark sets (including 49 functions) are used to evaluate the performance of the proposed algorithms. Experimental results and statistical analysis indicate that the enhanced algorithms perform better or at least comparable to their original versions. Copyright © 2018 Inderscience Enterprises Ltd.

关键词： Complex networks

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Efficient NAS Benchmark Kernels with C++ Parallel Programming 26

Efficient NAS Benchmark Kernels with C++ Parallel Programmin...

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26th Euromicro International Conference on Parallel, Distributed, and Network-Based Processing, PDP 2018

作者： Griebler, Dalvan Loff, Junior Mencagli, Gabriele Danelutto, Marco Fernandes, Luiz Gustavo Pontifical Catholic University of Rio Grande Do sul Parallel Application Modeling Group Porto Alegre Brazil University of Pisa Computer Science Department Pisa Italy

ISBN: (纸本)9781538649756

Benchmarking is a way to study the performance of new architectures and parallel programming frameworks. Well-established benchmark suites such as the NAS Parallel Benchmarks (NPB) comprise legacy codes that still lack portability to C++ language. As a consequence, a set of high-level and easy-to-use C++ parallel programming frameworks cannot be tested in NPB. Our goal is to describe a C++ porting of the NPB kernels and to analyze the performance achieved by different parallel implementations written using the Intel TBB, OpenMP and FastFlow frameworks for Multi-Cores. The experiments show an efficient code porting from Fortran to C++ and an efficient parallelization on average. © 2018 IEEE.

关键词： Parallel programming

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Corrigendum to 'Transition in air pollution, disease burden and health cost in China: A comparative study of long-term and short-term exposure' [Environmental Pollution 277 (2021) Start page 4-End page 4/116770]

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Environmental pollution (Barking, Essex : 1987) 2023年 329卷 121714页

作者： Jun Liu Hao Yin Xiao Tang Tong Zhu Qiang Zhang Zhu Liu XiaoLong Tang HongHong Yi Department of Environmental Engineering School of Energy and Environmental Engineering University of Science and Technology Beijing Beijing 100083 PR China Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants University of Science and Technology Beijing Beijing 100083 PR China Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System Science Tsinghua University Beijing 100084 PR China. Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System Science Tsinghua University Beijing 100084 PR China School of Population and Public Health The University of British Columbia Vancouver BC Canada Energy and Resources Group University of California Berkeley CA USA. State Key Laboratory of Atmospheric Boundary Physics and Atmospheric Chemistry Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 PR China. State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing 100871 PR China. Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants University of Science and Technology Beijing Beijing 100083 PR China. Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants University of Science and Technology Beijing Beijing 100083 PR China. Electronic address: yihonghong@***.

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On the output controllability of a class of discrete nonlinear distributed systems: a fixed point theorem approach

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International Journal of Dynamics and Control 2018年第2期6卷 768-777页

作者： Lhous, Mustapha Rachik, Mostafa Bouyaghroumni, Jamal Tridane, Abdessamad Laboratory of Modeling Analysis Control and Statistics Department of Mathematics and Computer Science Faculty of Sciences Ain Chock Hassan II University of Casablanca Maarif Casablanca5366 Morocco Laboratory of Analysis Modelling and Simulation Department of Mathematics and Computer Science Faculty of Sciences Ben M’sik Hassan II University of Casablanca Sidi Othman Casablanca7955 Morocco Department of Mathematical Sciences United Arab Emirates University P.O. Box 15551 Al-Ain United Arab Emirates

Given a desired signal yd=(yid)i∈{0,…,N}, we investigate the optimal control, which applied to nonlinear discrete distributed system xi+1= Axi+ Exi+ Bui, to give a desired output yd. Techniques based on the fixed point theorems for solving this problem are presented. An example and numerical simulation is also given. © 2017, Springer-Verlag Berlin Heidelberg.

关键词： Topology

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A cellular hierarchy in melanoma uncouples growth and metastasis

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四川生理科学杂志 2022年第9期44卷 1633-1633页

作者： Panagiotis Karras Laboratory for Molecular Cancer Biology Center for Cancer Biology VIB Leuven Belgium Department of Oncology KU Leuven Leuven Belgium Department of Applied Mathematics and Theoretical Physics Centre for Mathematical Sciences University of Cambridge Cambridge UK The Wellcome Trust/CRUK Gurdon Institute University of Cambridge Cambridge UK Department of General Medical Oncology UZ Leuven Leuven Belgium BGI-Shenzhen Shenzhen China VIB BioImaging Core VIB Center for Brain and Disease Research Leuven Belgium VIB Bioimaging Core VIB Center for Inflammation Research Ghent Belgium Department of Biomedical Molecular Biology Ghent University Ghent Belgium FACS Expertise Center Center for Cancer Biology VIB Leuven Belgium Laboratory of Tumor Microenvironment and Therapeutic Resistance Center for Cancer Biology VIB Leuven Belgium Center for Brain & Disease Research VIB-KU Leuven Leuven Belgium Department of Human Genetics KU Leuven Leuven Belgium Data Mining and Modeling for Biomedicine Group VIB Center for Inflammation Research Ghent Belgium Department of Applied Mathematics Computer Science and Statistics Ghent University Ghent Belgium Laboratory for Translational Cell and Tissue Research Department of Imaging and Pathology KU Leuven Leuven Belgium Laboratory of Translational Genetics Center for Cancer Biology VIB Leuven Belgium Laboratory of Translational Genetics Center for Human Genetics KU Leuven Leuven Belgium Herbert Irving Comprehensive Center Columbia University Irving Medical Center New York USA Laboratory of Stem Cells and Cancer Université Libre de Bruxelles (ULB) Brussels Belgium Wellcome Trust-MRC Stem Cell Institute University of Cambridge Cambridge UK

Although melanoma is notorious for its high degree of heterogeneity and plasticity1,2,the origin and magnitude of cell-state diversity remains poorly ***,it is unclear whether growth and metastatic dissemination are supported by overlapping or distinct melanoma ***,by combining mouse genetics,single-cell and spatial transcriptomics,lineage tracing and quantitative modelling,we provide evidence of a hierarchical model of tumour growth that mirrors the cellular and molecular logic underlying the cell-fate specification and differentiation of the embryonic neural *** show that tumorigenic competence is associated with a spatially localized perivascular niche,a phenotype acquired through an intercellular communication pathway established by endothelial *** with a model in which only a fraction of cells are fated to fuel growth,temporal single-cell tracing of a population of melanoma cells with a mesenchymal-like state revealed that these cells do not contribute to primary tumour growth but,instead,constitute a pool of metastatic initiating cells that switch cell identity while disseminating to secondary *** data provide a spatially and temporally resolved map of the diversity and trajectories of melanoma cell states and suggest that the ability to support growth and metastasis are limited to distinct pools of *** observation that these phenotypic competencies can be dynamically acquired after exposure to specific niche signals warrant the development of therapeutic strategies that interfere with the cancer cell reprogramming activity of such microenvironmental cues.

关键词： melanoma metastasis organs

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Deep learning of preconditioners for conjugate gradient solvers in urban water related problems

arXiv

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arXiv 2019年

作者： Sappl, Johannes Seiler, Laurent Harders, Matthias Rauch, Wolfgang Unit of Environmental Engineering Faculty of Engineering Sciences Universität Innsbruck Technikerstraße 13 Innsbruck6020 Austria Interactive Graphics and Simulation Group Department of Computer Science Universität Innsbruck Technikerstraße 21 A Innsbruck6020 Austria

Solving systems of linear equations is a problem occuring frequently in water engineering applications. Usually the size of the problem is too large to be solved via direct factorization. One can resort to iterative approaches, in particular the conjugate gradients method if the matrix is symmetric positive definite. Preconditioners further enhance the rate of convergence but hitherto only handcrafted ones requiring expert knowledge have been used. We propose an innovative approach employing Machine Learning, in particular a Convolutional Neural Network, to unassistedly design preconditioning matrices specifically for the problem at hand. Based on an in-depth case study in fluid simulation we are able to show that our learned preconditioner is able to improve the convergence rate even beyond well established methods like incomplete Cholesky factorization or Algebraic MultiGrid. Copyright © 2019, The Authors. All rights reserved.

关键词： Conjugate gradient method

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Singularity structure simplification of hexahedral mesh via weighted ranking

arXiv

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arXiv 2019年

作者： Xua, Gang Ling, Ran Zhang, Yongjie Jessica Xiao, Zhoufang Ji, Zhongping Rabczuk, Timon School of Computer Science and Technology Hangzhou Dianzi University Hangzhou310018 China Key Laboratory of Complex Systems Modeling and Simulation Ministry of Education Hangzhou310018 China Department of Mechanical Engineering Carnegie Mellon University United States Institute of Structural Mechanics Bauhaus-Universitat Weimar Germany

In this paper, we propose an improved singularity structure simplification method for hexahedral (hex) meshes using a weighted ranking approach. In previous work, the selection of to-be-collapsed base complex sheets/chords is only based on their thickness, which will introduce a few closed-loops and cause an early termination of simplification and a slow convergence rate. In this paper, a new weighted ranking function is proposed by combining the valence prediction function of local singularity structure, shape quality metric of elements and the width of base complex sheets/chords together. Adaptive refinement and local optimization are also introduced to improve the uniformity and aspect ratio of mesh elements. Compared to thickness ranking methods, our weighted ranking approach can yield a simpler singularity structure with fewer base-complex components, while achieving comparable Hausdorff distance ratio and better mesh quality. Comparisons on a hex-mesh dataset are performed to demonstrate the effectiveness of the proposed method. Copyright © 2019, The Authors. All rights reserved.

关键词： Aspect ratio

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Author Correction: Perceived match between own and observed models' bodies: influence of face, viewpoints, and body size

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Scientific reports 2020年第1期10卷 17120页

作者： Lize De Coster Pablo Sánchez-Herrero Carlos Aliaga Miguel A Otaduy Jorge López-Moreno Ana Tajadura-Jiménez DEI Interactive Systems Group Department of Computer Science and Engineering Universidad Carlos III de Madrid Avenida de la Universidad 30 28911 Leganés Madrid Spain. lcoster@inf.uc3m.es. Seddi Labs Madrid Spain. Modeling and Virtual Reality Group Department of Computer Science Universidad Rey Juan Carlos Madrid Spain. Multimodal Simulation Lab Department of Computer Science and Architecture Computer Systems and Languages Statistics and Operative Investigation Universidad Rey Juan Carlos Madrid Spain. DEI Interactive Systems Group Department of Computer Science and Engineering Universidad Carlos III de Madrid Avenida de la Universidad 30 28911 Leganés Madrid Spain.

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

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