Using software components has become a widely used development technique for building large enterprise systems. However in practice, component applications are still primarily built using simple component models and a...
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Using software components has become a widely used development technique for building large enterprise systems. However in practice, component applications are still primarily built using simple component models and advanced component models offering valuable features like component nesting, multiple communication styles, behavior validation, etc. are omitted (by industry in particular). Based on our experience, such an omitting is mainly caused due to usually unbalanced semantics of these advanced features. In this paper, we present a "next-generation" component model SOFA 2.0, which in particular aims at a proper support of such advanced features.
Requirements traceability is becoming increasingly significant element in softwareengineering. It provides critical function in the development and maintenance of a software system. From the software evolution point ...
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Requirements traceability is becoming increasingly significant element in softwareengineering. It provides critical function in the development and maintenance of a software system. From the software evolution point of view, requirements traceability plays an important role in facilitating software evolution. Since the evolution is inevitable, a traceability approach must take as much as possible the important influencing aspects into account to the evolution processes in order to minimize the evolution efforts. This paper evaluates several recent traceability approaches published in literature with the focus on their contributions to software evolution. The evaluation results may be used as a basis for improving requirements traceability approaches that may simplify the software evolution tasks.
For some time now, researchers have been seeking to place software measurement on a more firmly grounded footing by establishing a theoretical basis for software comparison. Although there has been some work on trying...
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It is more convenient to talk about changes in a domainspecific way than to formulate them at the programming construct level or-even worse-purely lexical level. Using aspect-oriented programming, changes can be modul...
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It is more convenient to talk about changes in a domainspecific way than to formulate them at the programming construct level or-even worse-purely lexical level. Using aspect-oriented programming, changes can be modularized and made reapplicable. In this paper, selected change types in web applications are analyzed. They are expressed in terms of general change types which, in turn, are implemented using aspect-oriented programming. Some of general change types match aspect-oriented design patterns or their combinations.
A combination of closed sequential pattern mining and closed itemset pattern mining was proposed to mine closed multidimensional sequential patterns. There are two ways for this combination; (1) mining closed itemset ...
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A combination of closed sequential pattern mining and closed itemset pattern mining was proposed to mine closed multidimensional sequential patterns. There are two ways for this combination; (1) mining closed itemset patterns from multidimensional information followed by mining closed sequential patterns from sequences associated with closed itemset patterns, and (2) mining closed sequential patterns from sequences followed by mining closed itemset patterns from multidimensional information associated with closed sequential patterns. In the first way the major cost is mining all sequences associated with closed itemset patterns. A similar problem occurs with the second way, the major cost is mining all multidimensional information associated with closed sequential patterns. Therefore, this paper proposes two new combinations that don't need to mine all sequences in the first combination, and all multidimensional information in the second combination. Both combinations can be effected by exploiting two concepts. In the first combination, any closed sequential patterns associated with a closed itemset patten I can be found from a set of closed sequential patterns associated with a closed itemset pattern I' if I sup I'. In the second combination, any closed itemset patterns associated with a closed sequential pattern s can be found from a set of closed sequential patterns associated with a closed itemset pattern s' if s sup s'.
This paper is aimed at the development of a high-precision, noninvasive, continuous blood pressure monitor using pulse arrival time (PAT). A continuous putative function of systolic blood pressure was realized using E...
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This paper is aimed at the development of a high-precision, noninvasive, continuous blood pressure monitor using pulse arrival time (PAT). A continuous putative function of systolic blood pressure was realized using Electrocardiogram (ECG) and the pulse signals for calculating the pulse wave are obtained from electrodes that are attached to both hands and a photoplethysmographic sensor attached to the tip of the finger and the hand. First, noise such as drift, electromyogram, and hum noise is reduced using a notch filter and a bandpass filter. Next, the QRS wave peak of the ECG is detected. In parallel with QRS wave peak detection, the leading edge of the pulse is detected. The interval between these two points is computed as the PAT. Then, the signal most correlated to change in blood pressure is selected. In this way, systolic blood pressure is computed continuously and precisely.
The proposed hyper knowledge discovery system is designed to facilitate domain users to interactively discover knowledge from complex data sets. At the first stage, this system integrates data preprocess, lexicon esta...
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The proposed hyper knowledge discovery system is designed to facilitate domain users to interactively discover knowledge from complex data sets. At the first stage, this system integrates data preprocess, lexicon establishment and database construction together. Then it provides domain users with flexibility and fuzzy mechanism to retrieve information and mine knowledge interactively. The system introduces an approach to obtain joint probability distributions of an arbitrary number of variables of multi valued states. This is fundamental for mining correlation and causal relations from the complex data sources. To attain these objectives, the system creatively exploits the functionalities of the relational database and SQL engine to reduce programming while achieving good performance. All the functionalities are online and hence facilitate resource and knowledge sharing.
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.
A novel objective full-reference image quality assessment metric based on symmetric geometric moments (SGM) is proposed. SGM is used to represent the structural information in the reference and test images. The refere...
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ISBN:
(纸本)9780769528779;0769528775
A novel objective full-reference image quality assessment metric based on symmetric geometric moments (SGM) is proposed. SGM is used to represent the structural information in the reference and test images. The reference and test images are divided into (8 times 8) blocks and the SGM up to fourth order for each block is computed. SGM of the corresponding blocks of the reference and test images are used to form the correlation index or quality metric of each block. The correlation index of the test image is then obtained by taking the average of all blocks. The performance of the proposed metric is validated through subjective evaluation by comparing with objective methods (PSNR and MSSIM) on a database of 174 Gaussian blurred images. The proposed metric performs better than PSNR and MSSIM by providing larger correlation coefficients and smaller errors after nonlinear regression fitting.
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.
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