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19th IEEE International Parallel and Distributed Processing Symposium, IPDPS 2005

作者： Bertrand, Felipe Bramley, Randall Bernholdt, David E. Kohl, James A. Sussman, Alan Larson, Jay W. Damevski, Kostadin B. Indiana University Computer Science Department Oak Ridge National Laboratory Computer Science and Mathematics Division University of Maryland UMIACS Department of Computer Science Argonne National Laboratory Mathematics and Computer Science Division University of Utah Scientific Computing and Imaging Institute

ISBN: (纸本)0769523129

With the increasing availability of high-performance massively parallel computer systems, the prevalence of sophisticated scientific simulation has grown rapidly. The complexity of the scientific models being simulated has also evolved, leading to a variety of coupled multi-physics simulation codes. Such cooperating parallel programs require fundamentally new interaction capabilities, to efficiently exchange parallel data structures and collectively invoke methods across programs. So-called "M×N" research, as part of the Common Component Architecture (CCA) effort, addresses these special and challenging needs, to provide generalized interfaces and tools that support flexible parallel data redistribution and parallel remote method invocation. Using this technology, distinct simulation codes with disparate distributed data decompositions can work together to achieve greater scientific discoveries.

关键词： Parallel processing systems

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Simple qualitative experiments with a sparse compiler 9th

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Proceedings of the 1996 9th International Workshop on Languages and Compilers for Parallel computing

作者： Bik, A.J.C. Wijshoff, H.A.G. High Performance Computing Division Department of Computer Science Leiden University Leiden 2300 RA Netherlands

ISBN: (纸本)3540630910

In this paper, we present some qualitative experiments that have been conducted with a sparse compiler. This compiler can automatically transform a program operating on two-dimensional arrays into semantically equivalent code that operates on sparse storage schemes. Automatic exploitation of sparsity to reduce the storage requirements and computational time of the original program substantially reduces the complexity of developing and maintaining the program and provides more opportunities for parallelization. The experiments indicate that, in many cases, a sparse compiler is capable of transforming a dense implementation of an algorithm into efficient sparse code.

关键词： Program compilers

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A flexible capacitive photoreceptor for the biomimetic retina

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Light(science & Applications) 2022年第1期11卷 38-49页

作者： Mani Teja Vijjapu Mohammed E.Fouda Agamyrat Agambayev Chun Hong Kang Chun-Ho Lin Boon S.Ooi Jr-Hau He Ahmed M.Eltawil Khaled N.Salama Sensors lab Advanced Membranes and Porous Materials CenterComputerElectrical and Mathematical Science and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Kingdom of Saudi Arabia Communication and Computing Systems Lab ComputerElectrical and Mathematical Science and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Kingdom of Saudi Arabia Department of Electrical Engineering and Computer Science University of California-IrvineIrvineCA 92612USA Department of Electrical Computer and Energy EngineeringArizona State UniversityTempeAZUSA Computer Electrical and Mathematical Science and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Kingdom of Saudi Arabia Department of Materials Science and Engineering City University of Hong KongHong Kong SARChina

Neuromorphic vision sensors have been extremely beneficial in developing energy-efficient intelligent systems for robotics and privacy-preserving security *** is a dire need for devices to mimic the retina's photoreceptors that encode the light illumination into a sequence of spikes to develop such ***,we develop a hybrid perovskite-based flexible photoreceptor whose capacitance changes proportionally to the light intensity mimicking the retina's rod cells,paving the way for developing an efficient artificial retina *** proposed device constitutes a hybrid nanocomposite of perovskites(methyl-ammonium lead bromide)and the ferroelectric terpolymer(polyvinylidene fluoride trifluoroethylene-chlorofluoroethylene).A metal-insulator-metal type capacitor with the prepared composite exhibits the unique and photosensitive capacitive behavior at various light intensities in the visible light *** proposed photoreceptor mimics the spectral sensitivity curve of human photopic *** hybrid nanocomposite is stable in ambient air for 129 weeks,with no observable degradation of the composite due to the encapsulation of hybrid perovskites in the hydrophobic *** functionality of the proposed photoreceptor to recognize handwritten digits(MNIST)dataset using an unsupervised trained spiking neural network with 72.05%recognition accuracy is *** demonstration proves the potential of the proposed sensor for neuromorphic vision applications.

关键词： perovskite illumination preserving

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Worm vs. Worm: Preliminary study of an active counter-attack mechanism

Worm vs. Worm: Preliminary study of an active counter-attack...

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WORM'04 - Proceedings of the 2004 ACM Workshop on Rapid Malcode

作者： Castañeda, Frank Sezer, Emre Can Xu, Jun Pervasive Computing Division IBM Software Group Department of Computer Science North Carolina State University

ISBN: (纸本)1581139705

Self-propagating computer worms have been terrorizing the Internet for the last several years. With the increasing density, inter-connectivity and bandwidth of the Internet combined with security measures that inadequately scale, worms will continue to plague the Internet community. Existing anti-virus and intrusion detection systems are clearly inadequate to defend against many recent fast-spreading worms. In this paper we explore an active counter-attack method - anti-worms. We propose a method that transforms a malicious worm into an anti-worm which disinfects its original. The method is evaluated using the CodeRed, Blaster and Slammer worms. We show through simulation the effectiveness of an anti-worm with several propagation schemes and its impact on the overall network. We also discuss important limitations of the proposed method. Copyright 2004 ACM.

关键词： computer worms

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Optimization of Interval Type-2 Fuzzy Logic System Using Grasshopper Optimization Algorithm

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computers, Materials & Continua 2022年第5期71卷 3513-3531页

作者： Saima Hassan Mojtaba Ahmadieh Khanesar Nazar Kalaf Hussein Samir Brahim Belhaouari Usman Amjad Wali Khan Mashwani Institute of Computing Kohat University of Science and TechnologyKohatPakistan Department of Mechanical Materials and Manufacturing EngineeringFaculty of EngineeringUniversity of NottinghamUK College of Computer Sciences and Mathematics Tikrit UniversityIraq Division of Information and Computing Technology College of Science and EngineeringHamad Bin Khalifa UniversityQatar Department of Computer Science Sir Syed University of Engineering and TechnologyPakistan Institute of Numerical Sciences Kohat University of Science and TechnologyKohatPakistan

The estimation of the fuzzy membership function parameters for interval type 2 fuzzy logic system(IT2-FLS)is a challenging task in the presence of uncertainty and *** optimization algorithm(GOA)is a fresh population based meta-heuristic algorithm that mimics the swarming behavior of grasshoppers in nature,which has good convergence ability towards *** main objective of this paper is to apply GOA to estimate the optimal parameters of the Gaussian membership function in an *** antecedent part parameters(Gaussian membership function parameters)are encoded as a population of artificial swarm of grasshoppers and optimized using its *** of the consequent part parameters are accomplished using extreme learning *** optimized IT2-FLS(GOAIT2FELM)obtained the optimal premise parameters based on tuned consequent part parameters and is then applied on the Australian national electricity market data for the forecasting of electricity loads and *** forecasting performance of the proposed model is compared with other population-based optimized IT2-FLS including genetic algorithm and artificial bee colony optimization *** of the performance,on the same data-sets,reveals that the proposed GOAIT2FELM could be a better approach for improving the accuracy of the IT2-FLS as compared to other variants of the optimized IT2-FLS.

关键词： Parameter optimization grasshopper optimization algorithm interval type-2 fuzzy logic system extreme learning machine electricity market forecasting

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Constructing fuzzy graphs from examples

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Intelligent Data Analysis 1999年第1期3卷 37-53页

作者： Berthold, Michael R. Huber, Klaus-Peter Berkeley Initiative in Soft Computing Computer Science Division Department of EECS Berkeley CA 94720 United States University of Karlsruhe Am Zirkel 2 76128 Karlsruhe Germany

Methods to build function approximators from example data have gained considerable interest in the past. Especially methodologies that build models that allow an interpretation have attracted attention. Most existing algorithms, however, are either complicated to use or infeasible for high-dimensional problems. This article presents an efficient and easy to use algorithm to construct fuzzy graphs from example data. The resulting fuzzy graphs are based on locally independent fuzzy rules that operate solely on selected, important attributes. This enables the application of these fuzzy graphs also to problems in high dimensional spaces. Using illustrative examples and a real world data set it is demonstrated how the resulting fuzzy graphs offer quick insights into the structure of the example data, that is, the underlying model. The underlying algorithm is demonstrated using several Java applets, which can be found under 'Electronic annexes' on ***/ida. © 1999 Elsevier science B.V. All rights reserved.

关键词： Graphic methods

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Making a packet: Cost-effective communication for a parallel graph reducer 8th

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8th International Workshop on Implementation of Functional Languages, IFL 1996

作者： Loidl, Hans-Wolfgang Hammond, Kevin Department of Computing Science University of Glasgow United Kingdom Division of Computer Science University of St. Andrews United Kingdom

ISBN: (纸本)9783540632375

This paper studies critical runtime-system issues encoun-tered when packing data for transmission in a lazy, parallel graph re-duction system. In particular, we aim to answer two questions: How much graph should go into a packet? How aggressively should a processor look for work after requesting remote data? In order to answer the first question, we compare various packing schemes, of which one extreme packs just the node that is demanded ("incremental fetching"), and the other packs all the graph that is reachable from that node ("bulk fetching"). The second question is addressed by considering various mechanisms for latency hiding during communication, ranging from fully synchronous communication with no attempt to mask latency, to full thread migration during asynchronous communication. In order to make our results as general as possible, we have used the GranSim simulator to study a wide variety of parallel machine configurations. Based on these measurements we propose concrete improvements for parallel graph reducers such as the GUM implementation of Glasgow Parallel Haskell. © Springer-Verlag Berlin Heidelberg 1997.

关键词： Cost effectiveness

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Fuzzy Set-Membership Filtering for Discrete-Time Nonlinear Systems

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IEEE/CAA Journal of Automatica Sinica 2022年第6期9卷 1026-1036页

作者： Jingyang Mao Xiangyu Meng Derui Ding Department of Control Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China Division of Electrical and Computer Engineering Louisiana State UniversityBaton RougeLA70803 USA IEEE School of Science Computing and Engineering TechnologiesSwinburne University of TechnologyMelbourneVIC 3122Australia

In this article,the problem of state estimation is addressed for discrete-time nonlinear systems subject to additive unknown-but-bounded noises by using fuzzy set-membership ***,an improved T-S fuzzy model is introduced to achieve highly accurate approximation via an affine model under each fuzzy ***,compared to traditional prediction-based ones,two types of fuzzy set-membership filters are proposed to effectively improve filtering performance,where the structure of both filters consists of two parts:prediction and *** the locally Lipschitz continuous condition of membership functions,unknown membership values in the estimation error system can be treated as multiplicative noises with respect to the estimation ***-time recursive algorithms are given to find the minimal ellipsoid containing the true ***,the proposed optimization approaches are validated via numerical simulations of a one-dimensional and a three-dimensional discrete-time nonlinear systems.

关键词： Affine model membership functions set-membership filtering stability Takagi-Sugeno fuzzy modeling

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Analyzing catastrophic backtracking behavior in practical regular expression matching 14

Analyzing catastrophic backtracking behavior in practical re...

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14th International Conference on Automata and Formal Languages, AFL 2014

作者： Berglund, Martin Drewes, Frank Van Der Merwe, Brink Department of Computing Science Umeå University Umeå Sweden Department of Mathematical Sciences Computer Science Division University of Stellenbosch Stellenbosch South Africa

We develop a formal perspective on how regular expression matching works in Java1, a popular representative of the category of regex-directed matching engines. In particular, we define an automata model which captures all the aspects needed to study such matching engines in a formal way. Based on this, we propose two types of static analysis, which take a regular expression and tell whether there exists a family of strings which makes Java-style matching run in exponential time. © 2014 Automata and Formal Languages.

关键词： Pattern matching

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Precaution Chatbot for Epilepsy Patients using Natural Language Processing and Deep Learning Sequential Model 5

Precaution Chatbot for Epilepsy Patients using Natural Langu...

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5th International Conference on Innovative Data Communication Technologies and Application, ICIDCA 2024

作者： Kasthuri, E. Subbulakshmi, S. Sreedharan, Rajasree Department of Computer Science and Engineering Amrita School of Computing Amritapuri India Department of Computer Science and Applications Amrita School of Computing Amritapuri India Division of Nephrology Department of Pediatrics Medical College of Wisconsin MilwaukeeWI United States

Epilepsy is a brain disorder that can affect people of all ages which is one of the most common neurological disorders affecting around 50 million individuals. Healthcare Chatbots schedule appointments, respond to patient inquiries, and offer relevant information, freeing medical staff to handle life crises. This paper implements a chatbot for epilepsy patients to increase awareness about epilepsy. Patients may easily access this AI-based healthcare chatbot whenever they have queries regarding precautions to be taken by epilepsy patients. Chatbot uses a rich set of epilepsy-related datasets collected from trusted websites which are preprocessed with NLP techniques to prepare the data for model ***, LSTM, and RNN models are created and evaluated to produce answers to user queries related to possible precautions to avoid seizures, safety measures to be taken by patients with seizure history, etc. Evaluation of models shows that the RNN model generates more accurate answers with 94% accuracy. Finally, the epilepsy question answering Chatbot for precaution is concluded with the RNN model. © 2024 The Authors. Published by Elsevier B.V.

关键词： Deep neural networks

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