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33rd International Conference on Machine Learning, ICML 2016

作者： Wang, Yingfei Wang, Chu Powell, Warren Department of Computer Science Princeton University PrincetonNJ08540 United States Program in Applied and Computational Mathematics Princeton University PrincetonNJ08544 United States Department of Operations Research and Financial Engineering Princeton University PrincetonNJ08544 United States

ISBN: (纸本)9781510829008

We consider the problem of sequentially making decisions that are rewarded by "successes" and "failures" which can be predicted through an unknown relationship that depends on a partially controllable vector of attributes for each instance. The learner takes an active role in selecting samples from the instance pool. The goal is to maximize the probability of success, either after the offline training phase or minimizing regret in online learning. Our problem is motivated by real-world applications where observations are time consuming and/or expensive. With the adaptation of an online Bayesian linear classifier, we develop a knowledge-gradient type policy to guide the experiment by maximizing the expected value of information of labeling each alternative, in order to reduce the number of expensive physical experiments. We provide a finite-time analysis of the estimated error and demonstrate the performance of the proposed algorithm on both synthetic problems and benchmark UCI datasets.

关键词： Benchmarking

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Modular finite element parallel fluid applications simulator

American Society of Mechanical Engineers, Fluids Engineering...

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American Society of Mechanical Engineers, Fluids engineering Division (Publication) FED 1999年 250卷 251-256页

作者： Wong, K.L. Baker, A.J. Jt. Inst. for Computational Science University of Tennessee Knoxville TN 37996 United States Engineering Science Program University of Tennessee Knoxville TN 37996 United States

ISBN: (纸本)0791816613

With the rapid advances in high-performance computing technology in recent years, researchers at the University of Tennessee have initiated a collaborative project to address the theoretical, algorithmic, and numerical implementation issues of computational mechanics simulations. To meet the challenge, a Parallel Interoperable computational Mechanics Simulator System (PICMSS) has been established. Such effort entails the development of a modular finite element platform capable of admitting diverse CFD formulations, as well as closure models for physics phenomena, as required/derived by the users operating on supercomputers and networks of PC clusters. Incompressible Navier Stokes Benchmark solutions via a velocity-vorticity formulation are proposed to examine the integrity and scalability of PICMSS.

关键词： Parallel processing systems

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Predicting Potential Fires in Indonesia by Analyzing VIIRS Night Data during 2018 – 2022

Predicting Potential Fires in Indonesia by Analyzing VIIRS N...

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International Symposium on Grids and Clouds 2023 in conjunction with HEPiX Spring Workshop, ISGC and HEPiX 2023

作者： Suhardiman, Basuki Hermanto, Benni Rio Directorate of Information Technology Institut Teknologi Bandung Jl Ganesha 10 Bandung Indonesia Master’s Program in Computational Science Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Jl Ganesha 10 Bandung Indonesia Biomedical Engineering Department School of Electrical Engineering and Informatics Institut Teknologi Bandung Indonesia

Forest fires have been detected to occur in Indonesia since 1998. The forest fires mostly resulted from human activities in order to expand their land, especially oil palm lands. Once a land clearing is carried out, it covers areas of tens to hundreds of thousands of hectares. The peak of the forest fires occurred in 2015 when almost half of the world was affected especially by smoke from the fire. In 2011, VIIRS (Visible Infrared Imaging Radiometer Suite) was launched by NOAA (National Oceanic and Atmospheric Administration). In their collected data, there is data on Indonesia issued daily for areas in the islands of Java, Sumatra, Kalimantan, Sulawesi, and the general areas of Indonesia. The VIIRS night data shows the possibility of some burning at night. We need to identify burnings that potentially become fires, which are potentially producing smoke. It is important to observe areas where large-scale forest fires frequently occur, so the authority could do some prevention beforehand. Using existing data released per day per area, we utilize an ANN (Artificial Neural Network) to identify a potential fire. The processes start with data cleaning and processing, Neural Network creation, and finally ANN training and testing. By using the ANN prediction model with the MinMax Scaler, we choose variables Temperature, Radiant Heat Intensity, and Source Footprint. Simulations are made to show the ranges of these variables that predict the possibility of’flame’ status occurring. We conclude that the ANN method can give more accurate results than the existing classification. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Fires

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Simultaneous identification for synergistic transcription factors and their transcription factor binding sites

Simultaneous identification for synergistic transcription fa...

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5th International Conference on Complex, Intelligent and Software Intensive Systems, CISIS 2011

作者： Tsai, Zing Tsung-Yeh Huang, Grace Tzu-Wei Tsai, Huai-Kuang Institute of Information Science Academia Sinica Taipei 115 Taiwan Bioinformatics Program Taiwan International Graduate Program Taiwan Institute of Biomedical Informatics National Yang-Ming University Taiwan Joint CMU-Pitt PhD Program in Computational Biology University of Pittsburgh Carnegie Mellon University Pittsburgh PA United States Research Center for Information Technology Innovation Taipei 115 Taiwan Computer Science and Engineering National Taiwan Ocean University Keelung 202 Taiwan

ISBN: (纸本)9780769543734

Identifying transcription factor binding sites (TFBSs) is crucial for understanding the mechanism of transcriptional regulation. It is known that transcription factors (TFs) often cooperate to regulate genes. While traditional approaches can be used to discover binding motifs of a group of co-regulated genes, they often fail to accurately assign motifs to the corresponding TFs. Here, we consider two TFs together to infer their TFBSs and their synergistic relationship simultaneously. The basic idea is that if two TFs interact, their TFBSs, if distinct, would be conserved across species and coincided in the promoter regions of the genes they co-regulated. Applying our method to Saccharomyces cerevisiae chromatin immunoprecipitation data, we predicted 110 TF pairs with statistically significant motif assignments. A majority of these TF pairs have literature support to be synergistic, and the designated motifs to TFs match well with their known consensus. We further examined the synergism of predicted TF pairs in seven experimental conditions using ANOVA, and identified significant interactions. © 2011 IEEE.

关键词： Yeast

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Generating Activity Streams from Events occurring in company-internal IT infrastructures

Generating Activity Streams from Events occurring in company...

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2011 IEEE 13th International Conference on Communication Technology(ICCT 2011)

作者： Eng.S.M.Khaled Reza S.M.Mohsin Reza Masters Program in Computational Engineering (Distributed Systems Engineering) Faculty of Computer Science Dresden University of Technology Dresden Germany Masters Program in Information Technology (Embedded Systems Engineering) Faculty of Computer Science Electrical Engineering and Information Technology University of Stuttgart Germany

In the current era of technology,the Internet and web technologies become the center source of *** to the huge amount of contents,one of the main challenges of modern information technology is aimed at how to reduce and manage information in a structured way with mobilizing users to the similar kind of relevant ***,any intelligent system should be able to understand people's interest about a particular type of information and automatically mobilize him to the similar kind of available information *** idea of high level Activity Streams along with its standardized format can play a vital role to solve this problem in the broader *** paper introduces a novel system called CoASGen (Consolidation and Activity Streams Generator) which is able to automatically generate high level Activity Streams after aggregating and consolidating from different independent systems (*** a software company context:version management system,wikis,bug trackers etc.).It retrieves life time information as heterogeneous web feed by sensing user activities from those independent systems and then it transforms several similar types of atomic activities into high level Activity Streams using semantic technologies along with its specific standardized ***,it shows these high level Activity Streams to the user interface which is able to automatically motivate users to find relevant information easily without either missing any data or losing valuable *** system solves the problem "data silos" by reducing and managing information in a structured way.

关键词： Activity Streams,Atomic Activity,High Level Activity Stream,CoASGen System

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Effect of competing failures and load redistributions on progressive failure predictability in truss structures

Effect of competing failures and load redistributions on pro...

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11th AIAA/ISSMO Multidisciplinary Analysis and Optimaztion Conference

作者： Marhadi, Kun Venkataraman, Satchi San Diego State University San Diego CA 92182-1308 United States Computational Science Program AIAA United States Department of Aerospace Engineering and Engineering Mechanics San Diego State University Mail Code 1308 5500 Campanile Drive San Diego CA 92182-1308 United States

ISBN: (纸本)1563478234

The progressive failure of redundant truss structures was investigated. Energy absorption of the truss under progressive failure is taken as a measure of its performance. The non-deterministic energy absorption when small random design variations were introduced was calculated. Measures for robustness and predictability are proposed. Designs with different performance, robustness and predictability identified using a deterministic optimization procedure are investigated and characteristics that contribute to better energy absorption, robustness and predictable progressive failure are identified. The presence of competing failures is shown to lead to competing failure sequences. Investigating the failure sequence events and the energy absorption of competing failure sequences in non-robust designs indicate that energy absorption is a function of the stiffness of the competing member that fails first. To improve the total energy dissipated, failure sequences must be tailored so that the stiffer members whose failures do not lead to the structure becoming mechanism fails before the less loaded and less stiff members that are needed to keep the structure intact fail. To improve predictability, competing failures must be eliminated by separating the safety factors of critical members at each failure event.

关键词： Trusses

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General Nonlinear Equilibrium Equation Solution of the Straight Wire Strand

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AIP Conference Proceedings 2007年第1期936卷 174-177页

作者： C. Erdönmez C. E. İmrak aIstanbul Technical University Institute of Informatics Computational Science and Engineering Program 34469 Maslak Istanbul Turkey bIstanbul Technical University Faculty of Mechanical Engineering 34394 Gumussuyu Istanbul Turkey

The most analyses of wire ropes are based on the well known classical treatise on elasticity by Love in 1944. A general theory of thin rods are included and investigated extensively. General equilibrium equations of a thin rod on arc length are derived and presented. The analytical and numerical solutions of wire ropes are based on the equilibrium equations as the starting point for the solutions in most of the papers. Helical rod model is first introduced by Phillips and Costello based on the equilibrium equations given by Love. General nonlinear equilibrium equation solution of the straight wire strand is given in this study and showed that it is harmonious with the results presented by Costello.

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Unsteady aerodynamic effects of wing-body interactions in three-dimensional insects' flapping flight 50

Unsteady aerodynamic effects of wing-body interactions in th...

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50th AIAA Aerospace sciences Meeting Including the New Horizons Forum and Aerospace Exposition

作者： Lee, Kuen-Bae Kim, Jin-Ho Park, Jin Seok Kim, Chongam Interdisciplinary Program in Computational Science and Technology Seoul National Univ. Seoul 151-742 Korea Republic of Department of Aerospace Engineering Seoul National Univ. Seoul 151-742 Korea Republic of School of Mechanical and Aerospace Engineering Institute of Advanced Aerospace Technology Seoul National University Korea Republic of

ISBN: (数字)9781600869365

This paper investigates the unsteady aerodynamic features of wing-wing, wing-body and vortex-vortex interactions in insects' flapping motions under forward flight condition. A realistic wing trajectory, called the 'figure-of-eight' motion, is extracted from a blowfly (Phormia regina)'s tethered flight experiment under the freestream velocity of 2.75m/s. Since the flow field around the blowfly exhibits characteristics of low-Reynolds number flow, the three-dimensional unsteady incompressible Navier-Stokes equations are employed as the governing equations. In order to simulate the realistic insect flapping flight including geometric and kinematical complexity with a sufficient level of grid quality, overset grid technique is used. From the authors' previous researches on two- and three-dimensional rigid wing simulation, it has been observed that the pattern of vortical flows and the interaction of vortices play an important role in generating unsteady aerodynamic forces and determining the propulsive efficiency of flapping motion. Detailed numerical simulations of a blowfly's 'wing-body' motion are conducted to examine unsteady flow features resulted from the wing-body interaction. Copyright © 2012 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

关键词： Navier Stokes equations

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Incomplete inverse preconditioners

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ARI Bulletin of the Istanbul Technical University 2005年第3期54卷 48-64页

作者： Alvarado, Fernando Dag, Hasan Department of Electrical and Computer Engineering University of Wisconsin Madison 53706 United States Computational Science and Engineering Program Informatics Institute Istanbul Technical University 34469 Maslak Istanbul Turkey

Incomplete LU factorization is a valuable preconditioning approach for sparse iterative solvers. An "ideal" but inefficient preconditioner for the iterative solution of Ax = b is A-1 itself. This paper describes a preconditioner based on sparse approximations to partitioned representations of A-1, in addition to the results of implementation of the proposed method in a shared memory parallel environment. The partitioned inverses are normally somewhat sparse. Their sparsity can be enhanced with suitable ordering and partitioning algorithms. Sparse approximations to these partitioned inverse representations can be obtained either by discarding selected nonzero entries of these inverses or by precluding the creation of some inversion fills. Experimental results indicate that the use of these partitioned incomplete inverses as preconditioners results in excellent highly parallel preconditioners.

关键词： Conjugate gradient Iterative methods Parallel computation Partitioned inverse method Preconditioner

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Proposed framework for applying adaptive critics in real-time realm

Proposed framework for applying adaptive critics in real-tim...

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International Joint Conference on Neural Networks (IJCNN)

作者： G.G. Lendaris R.A. Santiago M.S. Carroll Systems Science and of Electrical & Computer Engineering Northwest Computational Intelligence Laboratory Portland State University Portland OR USA Systems Science Program Northwest Computational Intelligence Laboratory Portland State University Portland OR USA

Adaptive critics have shown much promise for designing optimal nonlinear controllers in an off-line context. Still, their greatest potential exists in the context Of reconfigurable control, that is, real time controller redesign in response to (substantial) changes in plant dynamics. To accomplish this, a framework is proposed for the application of adaptive critics in real-time control (for those critic methods requiring a model of the plant). The framework is presented in the context of work being done in reconfigurable flight control by the NW computational Intelligence Lab (NWCIL) at Portland State University. The proposal incorporates recent work (by others) in fast and efficient on-line plant identification, considerations for bounding the computational costs of converging neural networks, and a novel approach (by us) toward the task of assuring system stability during the adaptation process. The potential and limitations of the proposed framework are discussed. It is suggested that with the recent rapid reduction in computational barriers, only certain theoretical issues remain as the central barriers to successful on-line application of the methods.

关键词： programmable control Adaptive control Optimal control Neural networks computational intelligence Control systems Stability State-space methods Design methodology Piecewise linear approximation

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