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Recently, cloud computing has become popular for its unique advantages. Many applications have been migrated to cloud as web services. However, evaluating the performance of cloud services is non-trivial. Performance testing is one of the dominant techniques for evaluating system performance. In this paper, we present a model and template-based approach that automatically generates test scripts and...
As we approach the era of exascale computing, the role of distributions to summarize, analyze and visualize large scale data is becoming more and more important. Since histograms continue to be a popular way of modeling the underlying data distribution, we propose a scalable and distributed framework for computing histograms from scalar and vector data at different levels of detail required by various...
User model is one of the fundamentals to support personalized services. Not only the model has to represent user preferences precisely, but it must reflect the changes of user preferences over time as well. Existing user modeling approaches have several deficiencies such as lack of dynamics and adaptation, so the evolution of these models is much de-pendent on user's explicit feedbacks. Particularly,...
In the 90s there was introduced concept of system of systems (SoS) in order to deal with growing complexity, geographical distribution, and heterogeneity of the various technological systems such as, for instance, modern factories. Methods of the traditional system engineering have been challenged in capturing of SoS specific nature like evolving requirements, ambulatory boundaries, decentralization,...
The development of information service tends to be socialized, to be integrated, to be interchanged and to be extracted. To be digitalized and to be networking of the information resources will be convenient for the development of the information service, at the same time, requiring more highly. Framework of automated information system in cloud network (AISCN) the paper presents will aim to satisfy...
The 2-D development process of water cannon is numerically investigated and visualized by a new type of integrated simulation technique. CFD (Computational Fluid Dynamics) analyze focused on the distribution of pressure, velocity and turbulence kinematic energy. Utilizing the governing equations for high-speed flow based on the LES-VOF model, a parallel computation is performed to clarify the detailed...
Ship motion prediction is essential for the safety of shipboard helicopter. If roll/pitch/heave exceeds some prescribed operating limit, potential crashes may occur. In order to prolong the prediction length, a hybrid algorithm based on particle swarm optimization and simulated annealing (HPSO) is proposed to choose the parameters of least square support vector machine (LSSVM). The HPSO-LSSVM method...
The authenticity of advertised QoS for Web services is of particular relevance during service discovery and selection. Reputation of a service is often used as a measure of its trustworthiness. Currently, reputation is usually computed from the users' feedbacks and represents a snapshot for the interactions in a past time slot. However, in an open environment, reputation is a volatile property, which...
In this paper, a SAR raw data simulation method for urban scene is presented based on the hypothesis that urban area is a set of vertical buildings placed over a random rough dielectric terrain. Facet model and Kirchhoff approach appropriately including multiple-scattering effects are adopted here to compute scattering coefficients in the scattering model, which operates in two-dimensional Fourier...
With the improvement of SoC design flow, early system prototype is an efficient way in which designers can find function bugs and performance limitations. The SystemC transaction-level model, a high level system model, has been attracted great attentions in embedded system design community. In this paper, we present a system prototype methodology, its corrective modeling technique and development...
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