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CantorSim: Simplifying Acceleration of Micro-architecture Simulations

CantorSim: Simplifying Acceleration of Micro-architecture Si...

引用

International Symposium on Modeling, Analysis and Simulation of computer and Telecommunication systems (MASCOTS)

作者： Zhibin Yu Hai Jin Jian Chen Lizy K. John Service Computing Technology and System Laboratory Cluster and Grid Computing Laboratory Huazhong University of Science and Technology Wuhan China Department of Electrical and Computer Engineering University of Texas Austin Austin TX USA

Many techniques have been developed to accelerate micro-architecture simulation since it is becoming increasingly urgent as the complexity of workloads and simulated processors increases. However, most of popular techniques need profiles or trial simulations to determine parameters before real simulations. When the number of dynamic instructions of workloads such as SPEC CPU2006 is huge, the profiles or trial simulations often take a long time. What's worse, any changes of benchmarks need to repeat the above work. This paper proposes a novel approach based on fractals to solve this problem. It employs the generation procedure of trisection Cantor Set, a classic fractal, to select instructions simulated in detail. We implement a simulator named CantorSim using the trisection Cantor fractal approach. The simulator is evaluated with benchmark programs from SPEC CPU2000 and SPEC CPU2006. We show that our approach is micro-architecture independent as the same parameter value for a single program yields similar results on processors with different configurations. The unified analytical model used to determine sampling parameters for different benchmarks indicates the proposed approach can save a lot of time for preparing parameters. On the other hand, for SPEC CPU2000 and SPEC CPU2006, CantorSim is slightly faster than SMARTSim. The validated average CPI relative errors of the SPEC CPU2000 and SPEC CPU2006 are 3.2% and 2.2% respectively. Therefore, our proposed approach can simplify acceleration of simulations significantly without sacrificing speed and accuracy.

关键词： Fractals Benchmark testing Acceleration Computational modeling Accuracy Predictive models Program processors

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Object rigidity and reflectivity identification based on motion analysis

Object rigidity and reflectivity identification based on mot...

引用

IEEE International Conference on Image Processing

作者： Di Zang Paul R. Schrater Katja Doerschner Department of Computer Science and Engineering University of Minnesota USA Key Laboratory of Embedded System and Service Computing Ministry of Education University of Tongji China National Research Center of Magnetic Resonance and Department of Psychology Bilkent University Turkey

Rigidity and reflectivity are important properties of objects, identifying these properties is a fundamental problem for many computer vision applications like motion and tracking. In this paper, we extend our previous work to propose a motion analysis based approach for detecting the object's rigidity and reflectivity. This approach consists of two steps. The first step aims to identify object rigidity based on motion estimation and optic flow matching. The second step is to classify specular rigid and diffuse rigid objects using structure from motion and Procrustes analysis. We show how rigid bodies can be detected without knowing any prior motion information by using a mutual information based matching method. In addition, we use a statistic way to set thresholds for rigidity classification. Presented results demonstrate that our approach can efficiently classify the rigidity and reflectivity of an object.

关键词： Optical imaging Adaptive optics Mutual information Shape computer vision Integrated optics Object recognition

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An active uplink photonic antenna

An active uplink photonic antenna

引用

Asia-Pacific Conference on Applied Electromagnetics, APACE

作者： N. F. Nanyan Siti Zaiton Mohd Hashim R. Ngah Y. Rahayu T. Prakoso Wireless Communication Centre Faculty of Electrical Engineering Universiti Teknologi Malaysia Johor Malaysia Department of Software Engineering Faculty of Computer Science & Information System Universiti Teknologi Malaysia Malaysia Faculty of Mechanical Engineering Universiti Malaysia Pahang Kuantan Pahang Malaysia

This paper presents a wideband photonic antenna consisting the laser diode, matching circuit, RF amplifier and microstrip patch antenna are fabricated and connected together to perform in uplink system. Laser driver is used to supply the dc biasing for the laser. Lastly, the LD-matching circuit, RF amplifier and antenna were arrange together and connected to perform the wireless uplink system. The simulated and measured results are presented and discussed. These results show useful photonic antenna design that achieves relatively wide bandwidth and has potential to be applied in RoF technology.

关键词： Photonics Microstrip antennas Antenna measurements Frequency measurement Diode lasers Microstrip

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Enhanced weakly trained frontal face detector for surveillance purposes

Enhanced weakly trained frontal face detector for surveillan...

引用

IEEE International Conference on Fuzzy systems (FUZZ-IEEE)

作者： Wael Louis K. N. Plataniotis Yong Man Ro Multimedia Laboratory Edward S. Rogers Department of Electrical and Computer Engineering University of Toronto Toronto Canada Image and Video System Laboratory Korea Advanced Institute of Science and Technology Daejeon South Korea

Face detection is becoming popular in surveillance applications; however, the need of enormous size face/non-face dataset, large number of features, and long training time are persistent problems. This paper claims that only a subset of the total number of features conserves the major power to detect faces; hence, this subset is capable to detect faces with high detection rate. The proposed detector fuses the results of two classifiers where one is trained with only 40 Haar-like features and the other is trained with only 50 LBP Histogram features. A pre-processing stage of skin-tone detection is applied to reduce the false positive rate. The detector is examined on real-life low-resolution surveillance sequence. Conducted experiments show that the proposed detector can achieve a high detection rate and a low false positive rate. Also, it outperforms Lienhart detector and tolerates wide range of illumination and blurring changes.

关键词： Feature extraction Face Detectors Histograms Pixel Training Face detection

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Reduction Criteria for Probabilistic Models with Spatial Restrictions on States

Reduction Criteria for Probabilistic Models with Spatial Res...

引用

International Conference on Networks Security, Wireless Communications and Trusted Computing, NSWCTC

作者： Niu Jun Guosun Zeng Embedded System and Service Computing Key Laboratory Ministry of Education Shanghai China College of Information Engineering Zhejiang Business and Technology Institute Ningbo China Department of Computer Science and Technology University of Tongji Shanghai China

ISBN: (纸本)9781424465972;9780769540115

Partial order reduction techniques have been used to combat the state explosion problem in model checking procedures for concurrent systems with probabilistic behaviors. There are some results that give criteria on applying partial order reduction for verifying quantitative time properties and reward-based properties on actions. However, there are many situations that reward-based properties are expressed on states rather than on actions because actions are triggered in no time and the quantities can not be obtained easily. This paper presents reduction criteria for a probabilistic temporal logic that allows specification of restrictions on quantitative measures given by spatial resources function for the states of the considered system and provides the proof of the correctness.

关键词： Explosions computer networks Concurrent computing Embedded computing Educational technology Probabilistic logic Communication system security computer security Information security Wireless communication

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A Generalized Model with Spatial Resources Labels

A Generalized Model with Spatial Resources Labels

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International Conference on Biomedical engineering and computer science (ICBECS)

This paper proposes a generalized model by extending Markov chain with spatial resources labels, which can describe the functional and performance properties and some basic characteristics such as nondeterminacy and randomicity. The syntax and semantics of the new model are shown based on the existing temporal logics such as CSRL and pathCSRL. The model checking procedure is discussed and thus the practicability of the new model is intuitive. Based on the existing models, the proposed model includes spatial resources labels only by adding the spatial information to the existing labels of states, so the treatment of the state explosion problem is similar to that in the existing models.

关键词： Educational technology Paper technology Logic Labeling Educational institutions Embedded system Embedded computing computer science education systems engineering education computer science

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Online information sharing issues in website personalization

Online information sharing issues in website personalization

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International Conference on User science and engineering (i-USEr)

作者： Mohd Norhisham Razali Fariza Hanis Abdul Razak Tan Soo Fun Rozita Hanapi Software Engineering School of Engineering and Information Technology Universiti Malaysia Sabah Malaysia Network and System Management Software Engineering and Information Technology Universiti Malaysia Sabah Malaysia Department of System Science Faculty of Computer and Mathematical Sciences Universiti Teknologi MARA Shah Alam Selangor Darul Ehsan Malaysia Office System Management Faculty of Office Management and Technology Universiti Teknologi MARA Shah Alam Selangor Darul Ehsan Malaysia

Website Personalization is one of strategic technique in delivering services in online applications. A part of process for building personalization applications is to collect particular information from the user which involves information sharing. However, the awareness about privacy concerns and security threats have caused to non-sharing behavior among the Internet Users. This situation have caused website personalization cannot be built to serve its purposes. This paper aims to investigate the people's behavior and to study the propensity of information sharing attitude in two different environments and cultures. The two environments are between real-life and online while the two cultures are between Malaysian and non-Malaysian. Since this is an exploratory study, interview with five (5) persons have been conducted. The qualitative technique that chooses was recommended for any exploratory study. The findings of this study explained the understanding of behaviors and the factors of Information Sharing. The factors are the cultural factors, the platform of sharing and the behavior of information sharing in web personalization. The sharing behavior in two environments and cultures were also compared. The data collected from the interviews have generalizing the speculations and issues in information sharing which have been discussed at the end section of this paper.

关键词： Privacy Internet Interviews Cultural differences Business Context Security

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Adaptive step size method for the power system model of dispatcher training simulator

Adaptive step size method for the power system model of disp...

引用

IEEE General Meeting Power& Energy Society

作者： Pyeong-Ik Hwang Seon-Ju Ahn Seong-Il Hur Yong-Tae Yoon Seung-Il Moon School of Electrical Engineering and Computer Science Seoul National University Seoul South Korea School of Electrical Engineering Myongji University Gyeonggi South Korea Information Technology Department Power System Operation Division Korea Power Exchange Seoul South Korea

Because it is almost impossible to train the dispatchers with real power system, the dispatcher training simulator (DTS) is used for the training. Among various components of the DTS, the power system model (PSM) emulates the dynamic behavior of the power system to calculate the frequency and voltage. In the PSM, the power plants are modeled as differential equations, so the mechanical power of the power plants is calculated by the numerical methods. Conventionally, the fixed step-size algorithm has been used in the PSM, however it has some drawbacks. This paper develops the prototype PSM using the Matlab, and analyzes the problems of the fixed step-size algorithm by comparing the results with those of PSCAD simulation considered as a real system. In order to overcome the limitations, the adaptive step size method for the PSM is proposed by modifying the general adaptive step size method. From the simulation using the proposed method, it is verified that the accuracy of the PSM is increased.

关键词： Load modeling Power system dynamics Prototypes Power generation Numerical models Topology

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The InterMedia networking and security architecture for user centric multimedia convergence

The InterMedia networking and security architecture for user...

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International Symposium on Performance Evaluation of computer & Telecommunication systems SPECTS

作者： Matteo Repetto Riccardo Rapuzzi Stefano Chessa Stefano Lenzi John Gialelis Tasos Fragopoulos Consorzio Nazionale Interuniversitario per le Telecomunicazioni Parma Italy Department of Communication Computer and System Science (DIST) University of Genoa Italy CNR (ISTI-CNR) Instituto di Scienza e Tecnologie dell'Informazione France Computer Science Department University of Pisa Pisa Italy Industrial Systems Institute University of Patras Greece Electrical Engineering Department University of Patras Greece

The InterMedia project aims at progressing towards user-centric convergence of multimedia, by putting the user at the center of services (multimedia applications), devices and interfaces for the interaction. One of the main implications of the user-centric approach is the seamless and secure access to content, regardless of the users' location and terminal device(s), which requires suitable solutions to manage mobility, context-awareness and digital rights. Under this respect this paper reviews the mechanisms developed within InterMedia to support the above issues, and discusses their integration in a common networking framework addressing a generic scenario for content access.

关键词： Sensors Context Licenses Multimedia communication Protocols Servers Transform coding

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Case Studies on Transition Fault Test Generation for At-speed Scan Testing

Case Studies on Transition Fault Test Generation for At-spee...

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IEEE International Symposium on Defect and Fault Tolerance in VLSI systems

作者： Nor Azura Zakaria Edward V. Bautista Jr. Suhaimi Bahisham Jusoh Weng Fook Lee Xiaoqing Wen Microelectronics Technology Realisation and Operations MIMOS Berhad Kuala Lumpur Malaysia Emerald Systems Design Center Penang Malaysia Department of Creation Informatics Graduate School of Computer Science & System Engineering Kyushu Institute of Technology Iizuka Japan

At-speed scan testing for intra-clock and inter-clock transition delay faults in a SOC design with multiple clock domains is an important and challenging issue. Current practice in industry usually applies a test scheme targeted on intra-clock transition fault delay testing (i.e., intra testing). In this paper a test scheme targeting both intra-clock and inter-clock domains for transition delay fault testing (i.e., intra-inter testing) is applied. This paper presents an empirical study by comparing between intra testing and intra-inter testing in terms of fault classification, test detection, test coverage, test volume, and test power by using industrial circuits. The information provided by this paper is beneficial to both practitioners and researchers in their pursuit of improving the quality of transition delay testing, which is critical to the quality of deep-sub micron VLSI chips.

关键词： Clocks Circuit faults Delay Synchronization Logic gates Automatic test pattern generation

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