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International Conference on software engineering (ICSE)

作者： Tuan-Anh Doan David Lo Shahar Maoz Siau-Cheng Khoo School of Computing National University of Singapore Singapore School of Information Systems Singapore Management University Singapore Department of Computer Science Software Engineering RWTH-Aachen Germany

We present LM, a tool for mining scenario-based specifications in the form of Live Sequence Charts, a visual language that extends sequence diagrams with modalities. LM comes with a project management component, a wizard-like interface to the mining algorithm, a set of pre- and post-processing extensions, and a visualization module.

关键词： Data mining Semantics Visualization Measurement software engineering Feature extraction software algorithms

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Secure coprocessor-based private information retrieval without periodical preprocessing

Conferences in Research and Practice in Information Technolo...

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Conferences in Research and Practice in Information Technology Series 2010年 105卷 5-11页

作者： Wang, Peishun Wang, Huaxiong Pieprzyk, Josef School of Computer Science and Software Engineering University of Wollongong NSW 2522 Australia Center for Advanced Computing Algorithms and Cryptography Department of Computing Macquarie University NSW 2109 Australia Division of Mathematical Sciences School of Physical and Mathematical Sciences Nanyang Technological University Singapore

ISBN: (纸本)9781920682866

Early works on Private Information Retrieval (PIR) focused on minimizing the necessary communication overhead. Theyseemed to achieve this goal but at the expense of query response time. To mitigate this weakness, protocols with secure coprocessors were introduced. They achieve optimal communication complexity and better online processing complexity. Unfortunately, all secure coprocessor-based PIR protocols require heavy periodical preprocessing. In this paper, we propose a new protocol, which is free from the periodical preprocessing while offering the opti-mal communication complexity and almost optimal online processing complexity. The proposed protocol is proven to be secure. © 2010, Australian Computer Society, Inc.

关键词： Coprocessor

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Diagrammatic representation and inference: 6th international conference, diagrams 2010 Portland, OR, USA, august 9-11, 2010 proceedings 6th

Diagrammatic representation and inference: 6th international...

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6th International Conference on Diagrammatic Representation and Inference, Diagrams 2010

作者： Jamnik, Mateja Goel, Ashok K. Narayanan, N. Hari School of Interactive Computing Georgia Institute of Technology Design & Intelligence Laboratory 85 Fifth Street NW AtlantaGA United States University of Cambridge Computer Laboratory JJ Thomson Avenue Cambridge United Kingdom Auburn University Department of Computer Science & Software Engineering 345W. Magnolia Street AuburnAL United States

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A Prediction Based Long-Cycle Time Synchronization Algorithm for Sensor Networks

A Prediction Based Long-Cycle Time Synchronization Algorithm...

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2010 IEEE Global Telecommunications Conference GLOBECOM 2010

作者： Wentao Jiang Limin Sun Junwei Lv Feng Wang Department of Control Engineering Naval Aeronautical and Astronautical University Yantai China Institute of Software Chinese Academy and Sciences Beijing China School of Computing Science Simon Fraser University BC Canada

Existing time synchronization algorithms and protocols mostly focus on improving the synchronization accuracy. However, they usually require frequent resynchronization to keep designed precision in actual applications, which leads to high energy consumption and heavy traffic load. This paper presents a Prediction based Long-cycle Time Synchronization algorithm (PLTS), which puts emphasis on reducing the resynchronization frequency while guaranteeing a given accuracy. PLTS is a combination of periodic synchronization and prediction synchronization. It makes use of an existing time synchronization protocol to accomplish the periodic synchronization, while during the intervals of periodic synchronization, each node applies a prediction model to calibrate its own logic time according to the crystal oscillator's frequency characteristics. By this means, all nodes can keep synchronization till next periodic synchronization starts. Experiment results show that PLTS can reduce resynchronization frequency remarkably and possesses good merits in saving energy and reducing traffic load.

关键词： Synchronization Crystals Oscillators Time frequency analysis Peer to peer computing Temperature Accuracy

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Testing as a Service over Cloud

Testing as a Service over Cloud

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The Fifth IEEE International Symposium on Service-Oriented System engineering(第五届IEEE面向服务的系统工程国际研讨会 SOSE 2010)

作者： Lian Yu Xiangji Chen Yan Zhao Liangjie Tang Linqing Liu Wei-Tek Tsai Wei Zhao School of Software and Microelectronics Peking University P.R. China School of Computing Informatics and Decision Systems Engineering Department of Computer Science an China Research Center IBM Beijing 100094 PRC

Testing-as-a-service (TaaS) is a new model to provide testing capabilities to end users. Users save the cost of complicated maintenance and upgrade effort, and service providers can upgrade their services without impact on the end-users. Due to uneven volumes of concurrent requests, it is important to address the elasticity of TaaS platform in a cloud environment. Scheduling and dispatching algorithms are developed to improve the utilization of computing resources. We develop a prototype of TaaS over cloud, and evaluate the scalability of the platform by increasing the test task load;analyze the distribution of computing time on test task scheduling and test task processing over the cloud;and examine the performance of proposed algorithms by comparing others.

关键词： TaaS (Testing as a Service) SaaS (software as a Service) cloud computing ontology scheduling and dispatching

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Spatial information based support vector machine for hyperspectral image classification

Spatial information based support vector machine for hypersp...

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IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： Bor-Chen Kuo Chih-Sheng Huang Chih-Cheng Hung Yu-Lung Liu I-Ling Chen Graduate Institute of Educational Measurement and Statistics National Taichung University Taichung Taiwan School of Computing and Software Engineering Southern Polytechnic State University GA USA Department of Computer Science and Information Engineering Asia University Taichung Taiwan

In this study, a novel spatial information based support vector machine for hyperspectral image classification, named spatial-contextual semi-supervised support vector machine (SC 3 SVM), is proposed. This approach modifies the SVM algorithm by using the spectral information and spatial-contextual information. The concept of SC 3 SVM is to utilize other information, obtain from the pixels of a neighborhood system in the spatial domain, to modify the effective of each patterns. Experimental results show a sound performance of classification on the famous hyperspectral images, Indian Pine site. Especially, the overall classification accuracy of whole hyperspectral image (Indian Pine site with 16 classes) is up to 96.4%, the kappa accuracy is up to 95.9%.

关键词： Support vector machines Accuracy Hyperspectral imaging Training Classification algorithms Pixel

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One Step More to Understand the Bug Report Duplication Problem

One Step More to Understand the Bug Report Duplication Probl...

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Brazilian Symposium on software engineering (SBES)

作者： Yguarata Cerqueira Cavalcanti Paulo Anselmo da Mota Silveira Neto Eduardo Santana de Almeida Daniel Lucrédio Carlos Eduardo Albuquerque da Cunha Silvio Romero de Lemos Meira Center for Informatics Federal University of Pernambuco (UFPE) Brazil Reuse in Software Engineering (RiSE) Computer Science Department Federal University of Bahia (UFBA) Brazil Computing Department Federal University of São Carlos (UFSCar) Brazil

According to recent work, duplicate bug reports impact negatively on software maintenance and evolution productivity due to, among other factors, the increased time spent on report analysis and validation. Therefore, a considerable amount of time is lost mainly with duplicate bug report analysis. In this sense, this work presents am exploratory study using data from bug trackers from private and open source projects, in order to understand the possible factors (i.e. software life-time, size, amount of bug reports, etc.) that cause bug report duplication and its impact on software development. This work also discusses bug report characteristics that could help identifying duplicates.

关键词： software Measurement Programming Vocabulary Browsers Electronic mail Fires

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Performance Tuning Towards a KVM-Based Low Latency Virtualization System

Performance Tuning Towards a KVM-Based Low Latency Virtualiz...

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International Conference on Information engineering and Computer science (ICIECS)

作者： Baojing Zuo Kai Chen Alei Liang Haibing Guan Jun Zhang Ruhui Ma Hongbo Yang School of Software Shanghai Jiaotong University Shanghai China School of Information Security Engineering Shanghai Jiaotong University Shanghai China Department of Computer Science and Engineering Shanghai Key Laboratory of Scalable Computing and Systems Shanghai Jiaotong University Shanghai China

Utilizing virtualization technology to combine real-time operating system(RTOS)and off-the-shelf time-sharing general purpose operating system (GPOS)is attracting much more interest *** combination has the potential to provide a large application base,and to guarantee timely deterministic response to real-time applications,yet there is no convincible experimental result about its real-time *** this paper,we analyze the interrupt latency of RTOS running on Linux KVM based on some preliminary tunings,and find out System Management Interrupt (SMI) is the main factor which makes the maximum latency unideal, so we propose a method to limit the worst-case interrupt latency in an acceptable ***,we also find out that boosting priority may result in wastes of CPU resources when RTOS is not executing real-time tasks,so we design a co-scheduling mechanism to improve the CPU throughput of the GPOS system.

关键词： Linux Real time systems Kernel Tuning Throughput Hardware

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A Translation Framework for Virtual Execution Environment on CPU/GPU Architecture

A Translation Framework for Virtual Execution Environment on...

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International Symposium on Parallel Architectures, Algorithms and Programming (PAAP)

作者： Guoxing Dong Kai Chen Erzhou Zhu Yichao Zhang Zhengwei Qi Haibing Guan School of Software Shanghai Jiaotong University Shanghai China School of Information Security Engineering Shanghai Jiaotong University Shanghai China Department of Computer Science and Engineering Shanghai Key Laboratory of Scalable Computing and Systems Shanghai Jiaotong University Shanghai China

GPUs are many-core processors with tremendous computational power. However, as automatic parallelization has not been realized yet, developing high-performance parallel code for GPUs is still very challenging. The paper presents a novel translation framework designed for virtual execution environment based on CPU/GPU architecture. It addresses two major challenges of taking advantage of general purpose computation on graphics processing units (GPGPU) to improve performance: no rewriting the existing source code and resolving binary compatibility issues between different GPUs. The translation framework uses semi-automatic parallelization technology to port existing code to explicitly parallel programming models. It not only offers a mapping strategy from X86 platform to CUDA programming model, but also synchronizes the execution between the CPU and the GPUs. The input to our translation framework is parallelizable part of the program within binary code. With an additional information related to the parallelizable part, the translation framework transforms the sequential code into PTX code and execute it on GPUs. Experimental results on several programs from CUDA SDK Code Samples and Parboil Benchmark Suite show that our translation framework could achieve very high performance, even up to several tens of times speedup over the X86 native version.

关键词： Graphics processing unit Registers Kernel Instruction sets Driver circuits Programming Computer architecture

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A novel model based on SOM2W network for listed reality companies analysis

A novel model based on SOM2W network for listed reality comp...

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International Conference on Financial Theory and engineering (ICFTE)

作者： Yongmei He Limin Wang Qian Sun Xuming Han Department of Information Changchun Taxation College Changchun China School of Computing and Software Engineering Southern Polytechnic State University USA College of Computer Science and Technology Jilin University Changchun China Institute of Information and Spreading Engineering Changchun University of Technology Changchun China

ISBN: (纸本)9781424477579;9781424477593;9781424477586

In order to get rid of the limit of traditional methods and provide a decision making reference for the supervision of securities organizations and the risk control of investors, A novel model based on SOM2W network (SOM with 2 winners self-organizing map) is proposed for assessment financial performance of the listed companies. In addition, a tabu-mapping method is proposed to avoid that the same output node is mapped by more than one input. The financial indexes reflecting the whole performance level of companies are used in the simulated experiments including earning per share, net asset yield and main profit margin. Simulation results show that the proposed model is feasible for assessment listed reality companies. It could provide an effective approach for analyzing and selecting listed companies, which has good potential in the financial field.

关键词： Neural networks Artificial neural networks Computer networks Mathematical model Information analysis Risk analysis Performance analysis software engineering Decision making Information security

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