作者:
Yanci ZhangHanqiu SunEnhua WuState Key Lab.of Computer Science
Institute of SoftwareChinese Academy of Sciences Department of Computer Science and EngineeringThe Chinese University of Hong Kong Faculty of Science and TechnologyUniversity of Macau
In this paper,we propose a novel method that represents the highly-complex point sets by clustering the points to normal-mapped B-spline surfaces (NBSs). The main idea is to construct elaborate normal maps on simple s...
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In this paper,we propose a novel method that represents the highly-complex point sets by clustering the points to normal-mapped B-spline surfaces (NBSs). The main idea is to construct elaborate normal maps on simple surfaces for the realistic rendering of complex point-set models. Based on this observation,we developed the coarse,normal-mapped B-spline surfaces to approximate the original point datasets with fine surface details. In our algorithm,a genetic clustering algorithm is proposed to automatically segment the point samples into several clusters according to their statistical properties,and a network of B-spline patches with normal maps are constructed according to the clustering results. Our experimental results show that this representation facilitates the modeling and rendering of complex point sets without losing the visual qualities.
Web service composition provision which requires efficient coordination of the execution of component services is a critical issue in service-oriented computing. Nowadays, BPEL4WS, the de facto industry standard for s...
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ISBN:
(纸本)9781595937575
Web service composition provision which requires efficient coordination of the execution of component services is a critical issue in service-oriented computing. Nowadays, BPEL4WS, the de facto industry standard for service compositions, is predominantly deployed in a way in which all interactions and intermediate data must go through one server. This centralised management results in problems such as poor performance, impaired reliability, limited scalability, and restricted flexibility. To address these problems, this research proposes an agent-based decentralised process management framework for Web service composition. This framework allows distributed BPEL engines, each of which is represented by a software agent, to manage the execution of relevant sub-processes, and to interact with one another directly to coordinate the execution of the whole process. Such a framework naturally reflects the distributed and dynamic features of the Web services environment and subsequently offers improved coordination support for service composition provision.
AXML (active XML) is a framework for peer-to-peer data integration from XML sources. In AXML documents data can be presented extensionally or intentionally by including calls to local or remote Web services. In comple...
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AXML (active XML) is a framework for peer-to-peer data integration from XML sources. In AXML documents data can be presented extensionally or intentionally by including calls to local or remote Web services. In complex AXML-based systems data retrieval can be inefficient. In the paper we propose a caching mechanism for systems based on active XML. We show how it can influence network communication and data integration processes.
In this paper we present the findings of our research which aims to develop an emotions filter that can be added to an existing Malay text-to-speech system to produce an output expressing happiness, anger, sadness and...
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In this paper we present the findings of our research which aims to develop an emotions filter that can be added to an existing Malay text-to-speech system to produce an output expressing happiness, anger, sadness and fear. The end goal is to produce an output that is as natural as possible, thus contributing towards the enhancement of the existing system. The emotions filter was developed by manipulating pitch and duration of the output using a rule-based approach. The data was made up of emotional sentences produced by a female native speaker of Malay. The information extracted from the analysis was used to develop the filter. The emotional speech output underwent several acceptance tests. The results showed that the emotions filter developed was compatible with FASIH and other TTS systems using the rule-based approach of prosodic manipulation. However, further work need to be done to enhance the naturalness of the output.
Providing fault tolerance for message passing parallel application on a distributed environment is a rule rather than an exception. A node failure can cause the whole computation to stop and has to be restarted from t...
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Providing fault tolerance for message passing parallel application on a distributed environment is a rule rather than an exception. A node failure can cause the whole computation to stop and has to be restarted from the beginning if no fault tolerance is available. However, introducing fault tolerance has some overhead on speedup that can be achieved. In this paper, we introduce a new technique called replication with cross-over packets for reliability and to increase fault tolerance over Very Large Scale Grids (VLSG). This technique has two pronged effect of avoiding single point of failure and single link of failure. We incorporate this new technique into the L-BSP model and show the possible speedup of parallel process. We also derive the achievable speedup for some fundamental parallel algorithms using this technique.
In this paper, combined with Tatsuoka 's Rule Space Model and the Attribute hierarchy Method (AHM), Formal Concept Analysis (FCA) is firstly applied into computerized Adaptive Testing (CAT). Based on FCA, an initi...
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In this paper, combined with Tatsuoka 's Rule Space Model and the Attribute hierarchy Method (AHM), Formal Concept Analysis (FCA) is firstly applied into computerized Adaptive Testing (CAT). Based on FCA, an initiatory and systemic CAT with cognitive diagnosis (CD) is designed, which diagnoses examinees real time. The result of Monte Carlo study shows that examinees ' knowledge states are well diagnosed and the precision in examinees ' abilities estimation is satisfied.
The QAOOSE 2007 workshop brought together, for half day, researchers working on several aspects related to quantitative evaluation of software artifacts developed with the object-oriented paradigm and related technolo...
ISBN:
(纸本)9783540781943
The QAOOSE 2007 workshop brought together, for half day, researchers working on several aspects related to quantitative evaluation of software artifacts developed with the object-oriented paradigm and related technologies. Ideas and experiences were shared and discussed. This report includes a summary of the technical presentations and subsequent discussions raised by them. Exceptionally this year, one of the founders of the workshop, Horst Zuse, gave a keynote on the Theoretical Foundations of Object-Oriented Measurement. Three out of the four submitted position papers were presented, covering different aspects such as measuring inconsistencies, visualizing metric values, and assessing the subjective quality of systems. In the closing session, the participants discussed open issues and challenges arising from researching in this area and tried to forecast what will be hot research topics in the short and medium terms.
Bloom's taxonomy of the cognitive domain and the SOLO taxonomy are being increasingly widely used in the design and assessment of courses, but there are some drawbacks to their use in computer science. This paper ...
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ISBN:
(纸本)9781450378420
Bloom's taxonomy of the cognitive domain and the SOLO taxonomy are being increasingly widely used in the design and assessment of courses, but there are some drawbacks to their use in computer science. This paper reviews the literature on educational taxonomies and their use in computer science education, identifies some of the problems that arise, proposes a new taxonomy and discusses how this can be used in application-oriented courses such as programming.
Learning Objects is not a new approach in electronic learning system. It has been applied since more than seven years ago. It can be clearly seen in CanCore project [9] in Canada and the emerging of several standards ...
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Middleware architectures play a crucial role in determining the overall quality of many distributed applications. Systematic evaluation methods for middleware architectures are therefore important to thoroughly assess...
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ISBN:
(纸本)9783540488194
Middleware architectures play a crucial role in determining the overall quality of many distributed applications. Systematic evaluation methods for middleware architectures are therefore important to thoroughly assess the impact of design decisions on quality goals. This paper presents MEMS, a scenario-based evaluation approach. MEMS provides a principled way of evaluating middleware architectures by leveraging generic qualitative and quantitative evaluation techniques such as prototyping, testing, rating, and analysis. It measures middleware architectures by rating multiple quality attributes, and the outputs aid the determination of the suitability of alternative middleware architectures to meet an application's quality goals. MEMS also benefits middleware development by uncovering potential problems at early stage, making it cheaper and quicker to fix design problems. The paper describes a case study to evaluate the security architecture of grid middleware architectures for managing secure conversations and access control. The results demonstrate the practical utility of MENIS for evaluating middleware architectures for multiple quality attributes.
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