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International Conference on computer Science and Software Engineering, CSSE 2008

作者： He, Zhen Niu, Qinzhou Tang, Tao Dep. of Electronic and Computer Science GuiLin University of Technology China Dep. of Mathematics and Physics GuiLin University of Technology China

ISBN: (纸本)9780769533360

With the development of telecommunication network, its large scale and complex frame work caused the relationship among mass alarms of network elements to become more and more complex. It is necessary to provide network administrator with an approach to implement alarm filtering and fault location. To meet this need, an improved FP-Growth algorithm is given with which a new model is proposed based on mining association rules. Then the paper focuses on the alarm filtering and fault location with the help of these rules. An experiment to check the model and this algorithm is introduced and analyzed at the end of the paper. © 2008 IEEE.

关键词： Data mining

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The effect of core number and core diversity on power and performance in multicore processors

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13th International computer Society of Iran computer Conference on Advances in computer Science and Engineering, CSICC 2008

作者： Zolfaghari Jooya, A. Soryani, M. Computer Science Dep. Iran University of Science and Technology Tehran Iran

ISBN: (纸本)3540899847

Today, multi-core processors dominate server, desktop and notebook computer's market. Such processors have been able to decrease power consumption and thermal challenges that designers face within single core processors. In order to improve multi-core processor's performance, designers should choose the best set of cores based on power consumption and execution delay. In this paper, we study several architectures that are composed of a configurable number of cores. We use three cores with different levels of performance and power consumption. Then, we implement different configurations of a multi-core processor. In each configuration, which has a different set of cores, we run benchmarks with various numbers of simultaneous threads, from 1 up to 32. Power consumption and execution delay of each configuration has been measured. It has been shown that the best configuration is a heterogeneous multi-core processor that is composed of 16 cores in our bounded area. Then, we examined various ways that threads can be assigned to different cores in the best configuration. It is shown that for serial workloads the best choice is to use high performance cores, but in parallel workloads that consist of multiple threads, a mixture of cores with different performance levels gives the best performance. © 2008 Springer-Verlag.

关键词： Electric power utilization

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A simple library and basic code for LUC cryptosystem computation

A simple library and basic code for LUC cryptosystem computa...

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International Symposium on Information technology 2008, ITSim

作者： Ali, Zulkarnain Md. Othman, Mohamed Said, Mohd Rushdan Mohd Sulaiman, Mohammad Nasir Dep. of Computer Science UKM 43600 Bangi Selangor Malaysia Dep. of Communication and Network Technology UPM 43400 Serdang Selangor Malaysia Dep. of Mathematics UPM 43400 Serdang Selangor Malaysia Dep. of Computer Science UPM 43400 Serdang Selangor Malaysia

ISBN: (纸本)9781424423286

The LUC Cryptosystem is one of public key cryptosystem. Both encryption and decryption process will use Lucas Function as its computation technique. At the moment, we are already developed a fast computation techniques for LUC Cryptosystem. The comparisons of the techniques are done by an analysis on its computation technique and computation time. In this paper, we are concentrating on using C language as our main programming language when we design proposed algorithms. To support the suitable C codes for that algorithm, we will design our own C library. Therefore, we will show a simple C library and its suitable codes that could represent the algorithm. We will also show the effectiveness of this library and its limitation that can be improved later. © 2008 IEEE.

关键词： Codes (symbols)

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Lazy instruction scheduling: Keeping performance, reducing power

Lazy instruction scheduling: Keeping performance, reducing p...

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ISLPED'08: 13th ACM/IEEE International Symposium on Low Power Electronics and Design

作者： Mahjur, Ali Taghizadeh, Mahmoud Jahangir, Amir Hossein Dep. of Electrical and Computer Engineering Shahid Beheshti University Tehran Iran Dept. of Computer Engineering Sharif University of Technology Tehran 11155-9517 Iran Dept. of Computer Engineering Sharif University of Technology Tehran 11155-9517 Iran

ISBN: (纸本)9781605581095

An important approach to reduce power dissipation is reducing the number of instructions executed by the processor. To achieve this goal, this paper introduces a novel instruction scheduling algorithm that executes an instruction only when its result is required by another instruction. In this manner, it not only does not execute useless instructions, but also reduces the number of instructions executed after a mispredicted branch. The cost of the extra hardware is 161 bytes for 128 instruction window size. Measurements done using SPEC CPU 2000 benchmarks show that the average number of executed instructions is reduced by 13.5% while the average IPC is not affected. Copyright 2008 ACM.

关键词： Scheduling algorithms

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Querying UML models using OCL and Prolog: A performance study

Querying UML models using OCL and Prolog: A performance stud...

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2008 IEEE International Conference on Software Testing Verification and Validation Workshop, ICSTW'08

作者： Chimiak-Opoka, Joanna Felderer, Michael Lenz, Chris Lange, Christian Institute of Computer Science University of Innsbruck Technikerstrasse 21a A-6020 Innsbruck Austria Dep. of Math. and Computer Science Eindhoven University of Technology Den Dolech 2 NL-5600 MB Eindhoven Netherlands

ISBN: (纸本)0769533884

The size of Unified Modeling Language (UML) models used in practice is very large and ranges up to hundreds and thousands of classes. Querying of these models is used to support their quality assessment by information filtering and aggregating. For both, human cognition and automated analysis, there is a need for fast querying. In this context performance of model queries becomes an important issue. We investigated performance characteristics of two different querying engines: one using the Object Constraint Language (OCL) and the other using Prolog. Our comparison is based on equivalent queries in both languages. We applied the queries to 118 models of a size up to 10000 classes to analyze model load and evaluation time. Our preliminary results show that if execution time of queries is linear then Prolog is faster. For one of the presented cases, the execution time in Prolog was nonlinear and. thus higher. Further studies should focus on a performance analysis reflecting expressiveness aspects. Our experimental material is accessible to enable future replications of this study. © 2008 IEEE.

关键词： Unified Modeling Language

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On controlling light transport in poor visibility environments

On controlling light transport in poor visibility environmen...

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ACM SIGGRAPH ASIA 2008 Courses, SIGGRAPH Asia'08

作者： Gupta, Mohit Narasimhan, Srinivasa G. Schechner, Yoav Y. Carnegie Mellon University School of Computer Sc. Pittsburgh 15232 United States Technion - Israel Institute of Technology Dep. of Electrical Eng. Haifa 32000 Israel

Poor visibility conditions due to murky water, bad weather, dust and smoke severely impede the performance of vision systems. Passive methods have been used to restore scene contrast under moderate visibility by digital postprocessing. However, these methods are ineffective when the quality of acquired images is poor to begin with. In this work, we design active lighting and sensing systems for controlling light transport before image formation, and hence obtain higher quality data. First, we present a technique of polarized light striping based on combining polarization imaging and structured light striping. We show that this technique out-performs different existing illumination and sensing methodologies. Second, we present a numerical approach for computing the optimal relative sensor-source position, which results in the best quality image. Our analysis accounts for the limits imposed by sensor noise.

关键词： Visibility

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Research on Personalized Application Recommendation System in the OTA System Based on Mining Users' Interests

Research on Personalized Application Recommendation System i...

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International Conference on Wireless Communications, Networking and Mobile Computing (WiCom)

作者： Zhen He Tao Tang Qirong Lu Dep. of Electronic and Computer Science GuiLin University of Technology Guilin China

At present, mobile network operators pay much more attention to personalized service than they used to. It is necessary to provide pertinent service to different customers who may have different demands. To meet the need of personalized recommendation system and aim at implementing personalized application recommendation, a new model in the OTA (Over the Air) system is proposed at the beginning of this paper. Then the paper focuses on the relationship between user's behavior of using this system and their preference and discusses the interests reflected by their behavior, and gives an algorithm of mining users' preference. And then the paper introduces a personalized application recommendation engine based on the methods of clustering and mining association rules to implement recommendation about valuable application items for users.

关键词： Frequency computer science Data mining Search engines Mobile communication Application software Helium Educational institutions Mobile computing Clustering algorithms

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A Quantum Algorithm for Minimal Spanning Tree

A Quantum Algorithm for Minimal Spanning Tree

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International Symposium on Information technology

作者： Aghaei, Mohammad Reza Soltan Zukarnain, Zuriati Ahmad Mamat, Ali Zainuddin, Hishamuddin Dep. of Computer Eng. Islamic Azad University of Khorasgan Isfahan Iran Faculty of Computer Science and Information Tech. University Putra Malaysia 43400 UPM Serdang Selangor Malaysia Faculty of Computer Science and Information Technology University Putra Malaysia 43400 UPM Serdang Selangor Malaysia Laboratory of Computational Sciences and Informatics Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia

ISBN: (纸本)9781424423279

Quantum computing algorithms are considered for several problems in graph theory. Classical algorithms involve searching over some space for finding the minimal spanning tree problem in a graph. We modify classical Prim's algorithm and replace quantum search instead of classical search, of which it will lead to more efficient algorithm. Also we we proposed the structure for non-classical algorithms and design the various phases of the probabilistic quantum-classical algorithm for classical and quantum parts. Finally, we represent the result of implementing and simulating Prim's algorithm in the probabilistic quantum-classical algorithm.

关键词： Trees (mathematics)

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Analytic modeling and metaheuristic PID control of a neutral time delay test case central heating system

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WSEAS Transactions on Systems and Control 2008年第11期3卷 967-981页

作者： Koumboulis, Fotis N. Kouvakas, Nikolaos D. Paraskevopoulos, Paraskevas N. Dep. of Automation Halkis Institute of Technology 34400 Psahna Evoia Greece Dep. of Electrical and Computer Engineering National Technical University of Athens 15780 Zographou Athens Greece

In the present paper, the analytic mathematical model of a test case central heating system is developed in the form of a nonlinear neutral time delay model with time varying delay which in turn is simplified to a neutral time delay model with constant time delay. In the process it is shown that the influence of the delay is significant, thus its incorporation to the model is of high importance while the constant delay approximation imposes only small error. A PID controller is derived to control the temperature of a room, which is modeled as a first order differential equation. The controller parameters are evaluated using a metaheuristic algorithm.

关键词： Three term control systems

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Lazy instruction scheduling: keeping performance, reducing power

Lazy instruction scheduling: keeping performance, reducing p...

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International Symposium on Low Power Electronics and Design (ISLPED)

作者： Ali Mahjur Mahmud Taghizadeh Amir Hossein Jahangir Dep. of Electrical and Computer Engineering Shahid Beheshti University Tehran Iran Dept. of Computer Engineering Sharif University of Technology Tehran Iran

关键词： Power dissipation Scheduling algorithm Pipelines computer aided instruction Power engineering computing Power engineering and energy Hardware Processor scheduling Yarn Permission

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