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IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Zhaoxia Wang C. S. Chang Yifan Zhang Department of Computer Science Institute of High Performance Computing Singapore Department of Electrical and Computer Engineering National University of Singapore Singapore

This paper studies the stator currents collected from several inverter-fed laboratory induction motors and proposes a new feature based frequency domain analysis method for performing the detection of induction motor faults, such as the broken rotor-bar or bearing fault. The mathematical formulation is presented to calculate the features, which are called FFT-ICA features in this paper. The obtained FFT-ICA features are normalized by using healthy motor as benchmarks to establish a feature database for fault detection. Compare with conventional frequency-domain analysis method, no prior knowledge of the motor parameters or other measurements are required for calculating features. Only one phase stator current waveforms are enough to provide consistent diagnosis of inverter-fed induction motors at different frequencies. The proposed method also outperforms our previous time domain analysis method.

关键词： Induction motors Time frequency analysis Feature extraction Rotors Fault detection Inverters

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Supervisory evolutionary optimization strategy for adaptive maintenance schedules

Supervisory evolutionary optimization strategy for adaptive ...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： Z. Wang C.S. Chang Department of Computer Science Institute of High Performance Computing Singapore Department of Electrical and Computer Engineering National University of Singapore Singapore

A supervisory strategy is proposed for improving the performance of an evolutionary-algorithm-based system-maintenance optimizer developed in our previous work for offshore power systems. The system-maintenance optimizer generates a set of initial maintenance plans, and exports them to an intelligent maintenance advisor connected to it for implementation. The proposed supervisory strategy uses a set of intelligent rules for adjusting the crossover and mutation rates of the present evolutionary algorithm. A mechanism is developed for refining and generalizing the supervisory rules according to the user's experience. The proposed supervisory strategy aims to improve the search ability and efficiency of the present evolutionary algorithm. Merits of the proposed supervisory strategy are demonstrated in case studies using our system-maintenance optimizer.

关键词： Maintenance engineering Reliability Genetics Markov processes Optimization Mathematical model Equations

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A multithreaded message-passing system for high performance distributed computing applications

A multithreaded message-passing system for high performance ...

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International Conference on Distributed computing Systems

作者： S.-Y. Park J. Lee S. Hariri High Performance Distributed Computing (HPDC) Laboratory Department of Electrical Engineering and Computer Science High Performance Distributed Computing HPDC Laboratory Syracuse University Syracuse NY USA

NYNET (ATM wide area network testbed in New York state) Communication System (NCS) is a multithreaded message passing system developed at Syracase University that provides high performance and flexible communication services over asynchronous transfer mode (ATM) based high performance distributed computing (HPDC) environments. NCS capitalizes on thread based programming model to overlap computations and communications, and develop a dynamic message passing environment with separate data and control paths. This leads to a flexible and adaptive message passing environment that can support multiple flow control, error control, and multicasting algorithms. We provide an overview of the NCS architecture and present how NCS point to point communication services are implemented. We also analyze the overhead incurred by using multithreading and compare the performance of NCS point to point communication primitives with those of other message passing systems such as p4, PVM, and MPI. Benchmarking results indicate that NCS shows comparable performance to other systems for small message sizes but outperforms other systems for large message sizes.

关键词： Message passing Asynchronous transfer mode Dynamic programming Communication system control Wide area networks System testing Distributed computing Yarn Computational modeling Programmable control

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Online fault detection of induction motors using frequency domain independent components analysis

Online fault detection of induction motors using frequency d...

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IEEE International Symposium on Industrial Electronics (ISIE)

This paper proposes an online fault detection method for induction motors using frequency-domain independent component analysis. Frequency-domain results, which are obtained by applying Fast Fourier Transform (FFT) to measured stator current time-domain waveforms, are analyzed with the aim of extracting frequency signatures of healthy and faulty motors with broken rotor-bar or bearing problem. Independent components analysis (ICA) is applied for such an aim to the FFT results. The obtained independent components as well as the FFT results are then used to obtain the combined fault signatures. The proposed method overcomes problems occurring in many existing FFT-based methods. Results using laboratory-collected data demonstrate the robustness of the proposed method, as well as its immunity against measurement noises and motor parameters.

关键词： Induction motors Frequency domain analysis Stators Feature extraction Time domain analysis Noise

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Combined Effect of Concept Drift and Class Imbalance on Model performance During Stream Classification

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computers, Materials & Continua 2023年第4期75卷 1827-1845页

作者： Abdul Sattar Palli Jafreezal Jaafar Manzoor Ahmed Hashmani Heitor Murilo Gomes Aeshah Alsughayyir Abdul Rehman Gilal Department of Computer and Information Sciences Universiti Teknologi PETRONAS(UTP)Seri Iskandar32610Malaysia Centre for Research in Data Science UTPPerak32610Malaysia High Performance Cloud Computing Centre(HPC3) UTPPerak32610Malaysia School of Engineering and Computer Science Victoria University of WellingtonWellington6012New Zealand AI Institute University of Waikato WellingtonHamilton3240New Zealand Anti-Narcotics Force Ministry of Narcotics ControlIslamabad46000Pakistan College of Computer Science and Engineering Taibah UniversityMadinah42353Saudi Arabia

Every application in a smart city environment like the smart grid,health monitoring, security, and surveillance generates non-stationary datastreams. Due to such nature, the statistical properties of data changes overtime, leading to class imbalance and concept drift issues. Both these issuescause model performance degradation. Most of the current work has beenfocused on developing an ensemble strategy by training a new classifier on thelatest data to resolve the issue. These techniques suffer while training the newclassifier if the data is imbalanced. Also, the class imbalance ratio may changegreatly from one input stream to another, making the problem more *** existing solutions proposed for addressing the combined issue of classimbalance and concept drift are lacking in understating of correlation of oneproblem with the other. This work studies the association between conceptdrift and class imbalance ratio and then demonstrates how changes in classimbalance ratio along with concept drift affect the classifier’s *** analyzed the effect of both the issues on minority and majority classesindividually. To do this, we conducted experiments on benchmark datasetsusing state-of-the-art classifiers especially designed for data stream ***, recall, F1 score, and geometric mean were used to measure theperformance. Our findings show that when both class imbalance and conceptdrift problems occur together the performance can decrease up to 15%. Ourresults also show that the increase in the imbalance ratio can cause a 10% to15% decrease in the precision scores of both minority and majority *** study findings may help in designing intelligent and adaptive solutionsthat can cope with the challenges of non-stationary data streams like conceptdrift and class imbalance.

关键词： Classification data streams class imbalance concept drift class imbalance ratio

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A novel PUF based on cell error rate distribution of STT-RAM 21

A novel PUF based on cell error rate distribution of STT-RAM

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21st Asia and South Pacific Design Automation Conference, ASP-DAC 2016

作者： Zhang, Xian Guangyu, Sun Zhang, Yaojun Chen, Yiran Li, Hai Wen, Wujie Di, Jia Center for Energy-Efficient Computing and Applications Peking University Beijing100871 China Collaborative Innovation Center of High Performance Computing NUDT Changsha410073 China Department of Electrical and Computer Engineering University of Pittsburgh PittsburghPA15261 United States Department of Electrical and Computer Engineering Florida International University MiamiFL33199 United States Computer Science and Computer Engineering University of Arkansas FayettevilleAR72701 United States

ISBN: (纸本)9781467395694

Physical Unclonable Functions (PUFs) have been widely proposed as security primitives to provide device identification and authentication. Recently, PUFs based on Non-volatile Memory (NVM) are widely proposed since the promise of NVMs' wide application. In addition, NVM-based PUFs are considered to be more immune to invasive attack and simulation attack than CMOS-based PUFs. However, the existing NVM-based PUF either shows the unreliability under environmental variations or need extra modifications to the IC manufacturing process. In this work, we propose err-PUF, a novel PUF design based on the cell error rate distribution of STT-RAM. Instead of using the distribution directly, we generate a stable fingerprint based on a novel concept called Error-rate Differential Pair (EDP) without modifications to the read/write circuits. Comprehensive results demonstrate that err-PUF can achieve sufficient reliability under environmental variations, which can significantly impact the cell error rates. Moreover, compared with existing approaches, err-PUF has a higher speed and lower power consumption with negligible overhead. © 2016 IEEE.

关键词： Hardware security

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Heuristics for robust allocation of resources to parallel applications with uncertain execution times in heterogeneous systems with uncertain availability

Heuristics for robust allocation of resources to parallel ap...

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World Congress on engineering, WCE 2014

作者： Hansen, Timothy Ciorba, Florina M. Maciejewski, Anthony A. Siegel, Howard Jay Srivastava, Srishti Banicescu, Ioana Department of Electrical and Computer Engineering Colorado State University Fort Collins CO 80523 United States Center for Information Services and High Performance Computing Technische Universitöt Dresden Dresden 01062 Germany Department of Computer Science and Engineering Mississippi State University Mississippi State MS 30692 United States

ISBN: (纸本)9789881925275

The scheduling of moldable parallel applications to clusters of processors is challenging, where the number of processors on which a moldable application executes is decided by the scheduler. When the application execution times are stochastic in nature, and the availability of the resources is uncertain, this becomes an even greater challenge. A model is presented for the stochastic execution times of moldable parallel applications that are assigned to heterogeneous parallel resources, incorporating the change in execution times when applications are mapped to different numbers of processors. To account for the uncertainties in both application execution times and resource availability, a robustness model that combines the two sources of uncertainties is proposed. Using this robustness model, three novel iterative-greedy heuristics are developed to allocate heterogeneous resources to batches of parallel applications to maximize the probability of completing by a designated time, called the makespan goal. To verify the performance of the proposed heuristics, a simulation study is conducted using different batch and system sizes. To showcase the benefit of using the proposed iterative-greedy heuristics, their performance is studied against two comparison heuristics. The five heuristics are evaluated against the upper bound on robustness.

关键词： Scheduling

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high performance Embedded Architectures and Compilers 1

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丛书名： Lecture Notes in computer science

1000年

作者： Tom Conte Nacho Navarro Wen-mei W. Hwu Mateo Valero Theo Ungerer

ISBN: (数字)9783540322726

ISBN: (纸本)9783540303176

As Chairmen of HiPEAC 2005, we have the pleasure of welcoming you to the proceedings of the ?rst international conference promoted by the HiPEAC N- work of Excellence. During the last year, HiPEAC has been building its clusters of researchers in computer architecture and advanced compiler techniques for embedded and high-performance computers. Recently, the Summer School has been the seed for a fruitful collaboration of renowned international faculty and young researchers from 23 countries with fresh new ideas. Now, the conference promises to be among the premier forums for discussion and debate on these research topics. Theprestigeofasymposiumismainlydeterminedbythequalityofitstech- cal program. This ?rst programlived up to our high expectations, thanks to the largenumber of strong submissions. The ProgramCommittee received a total of 84 submissions; only 17 were selected for presentation as full-length papers and another one as an invited paper. Each paper was rigorously reviewed by three ProgramCommittee members and at least one external referee. Many reviewers spent a great amount of e?ort to provide detailed feedback. In many cases, such feedback along with constructive shepherding resulted in dramatic improvement in the quality of accepted papers. The names of the Program Committee m- bers and the referees are listed in the proceedings. The net result of this team e?ort is that the symposium proceedings include outstanding contributions by authors from nine countries in three continents. In addition to paper presentations, this ?rst HiPEAC conference featured two keynotes delivered by prominent researchers from industry and academia.

关键词： Arithmetic and Logic Structures computer System Implementation Programming Languages, Compilers, Interpreters Input/Output and Data Communications Logic Design Processor Architectures

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Designing energy efficient communication runtime systems for data centric programming models

Designing energy efficient communication runtime systems for...

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IEEE International Conference on Green computing and Communications

作者： Vishnu, Abhinav Song, Shuaiwen Marquez, Andres Barker, Kevin Kerbyson, Darren Cameron, Kirk Balaji, Pavan High Peformance Computing Group Pacific Northwest National Lab. 902 Battelle Blvd Richland WA United States Scalable Performance Lab. Department of Computer Science Virginia Polytechnic Institute Blacksburg VA United States Mathematics and Computer Science Division Argonne National Lab. Argonne IL United States

ISBN: (纸本)9780769543314

The insatiable demand of high performance computing is being driven by the most computationally intensive applications such as computational chemistry, climate modeling, nuclear physics, etc. The last couple of decades have observed a tremendous rise in supercomputers with architectures ranging from traditional clusters to system-on-a-chip in order to achieve the petaflop computing barrier. However, with advent of petaflop-plus computing, we have ushered in an era where power efficient system software stack is imperative for execution on exascale systems and beyond. At the same time, computationally intensive applications are exploring programming models beyond traditional message passing, as a combination of Partitioned Global Address Space (PGAS) languages and libraries, providing one-sided communication paradigm with put, get and accumulate primitives. To support the PGAS models, it is critical to design power efficient and high performance one-sided communication runtime systems. In this paper, we design and implement PASCoL, a high performance power aware one-sided communication library using Aggregate Remote Memory Copy Interface (ARMCI), the communication runtime system of Global Arrays. For various communication primitives provided by ARMCI, we study the impact of Dynamic Voltage/Frequency Scaling (DVFS) and a combination of interrupt (blocking)/polling based mechanisms provided by most modern interconnects. We implement our design and evaluate it with synthetic benchmarks using an InfiniBand cluster. Our results indicate that PASCoL can achieve significant reduction in energy consumed per byte transfer without additional penalty for various one-sided communication primitives and various message sizes and data transfer patterns. © 2010 IEEE.

关键词： Supercomputers

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Entirety of Quantum Uncertainty and Its Experimental Verification

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Chinese Physics Letters 2021年第7期38卷 11-16页

作者： Jie Xie Li Zhou Aonan Zhang Huichao Xu Man-Hong Yung Ping Xu Nengkun Yu Lijian Zhang National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences and School of PhysicsNanjing UniversityNanjing 210093China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China Department of Computer Science and Technology Tsinghua UniversityBeijing 100084China Shenzhen Institute for Quantum Science and Engineering and Department of Physics Southern University of Science and TechnologyShenzhen 518055China Shenzhen Key Laboratory of Quantum Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Institute for Quantum Information&State Key Laboratory of High Performance Computing College of ComputerNational University of Defense TechnologyChangsha 410073China Centre for Quantum Software and Information School of SoftwareFaculty of Engineering and Information TechnologyUniversity of Technology SydneyNSWAustralia

As a foundation of quantum physics,uncertainty relations describe ultimate limit for the measurement uncertainty of incompatible ***,uncertainty relations are formulated by mathematical bounds for a specific *** we present a method for geometrically characterizing uncertainty relations as an entire area of variances of the observables,ranging over all possible input *** find that for the pair of position and momentum operators,Heisenberg's uncertainty principle points exactly to the attainable area of the variances of position and ***,for finite-dimensional systems,we prove that the corresponding area is necessarily semialgebraic;in other words,this set can be represented via finite polynomial equations and inequalities,or any finite union of such *** particular,we give the analytical characterization of the areas of variances of(a)a pair of one-qubit observables and(b)a pair of projective observables for arbitrary dimension,and give the first experimental observation of such areas in a photonic system.

关键词： observable union operators

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