Frontiers of Computer Science in China
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A 3D shape retrieval framework for 3D smart cities
Frontiers of Computer Science in China - Tập 4 - Trang 394-404 - 2010
This paper introduces the importance of 3D shape retrieval frameworks in 3D smart cities, and proposes a unified framework for 3D shape retrieval. The proposed method is based on the concept of visual representation, where each object is rendered with several depth images and binary images from distributed vertices in the regular polyhedron. For each image, several shape descriptors are utilized t......
Monitoring of particle swarm optimization
Frontiers of Computer Science in China - Tập 3 - Trang 31-37 - 2009
In this paper, several diversity measurements will be discussed and defined. As in other evolutionary algorithms, first the population position diversity will be discussed followed by the discussion and definition of population velocity diversity which is different from that in other evolutionary algorithms since only PSO has the velocity parameter. Furthermore, a diversity measurement called cogn......
Learning multiple metrics for ranking
Frontiers of Computer Science in China - Tập 5 - Trang 259-267 - 2011
Directly optimizing an information retrieval (IR) metric has become a hot topic in the field of learning to rank. Conventional wisdom believes that it is better to train for the loss function on which will be used for evaluation. But we often observe different results in reality. For example, directly optimizing averaged precision achieves higher performance than directly optimizing precision@3 wh......
On the verification of polynomial system solvers
Frontiers of Computer Science in China - Tập 2 - Trang 55-66 - 2008
We discuss the verification of mathematical software solving polynomial systems symbolically by way of triangular decomposition. Standard verification techniques are highly resource consuming and apply only to polynomial systems which are easy to solve. We exhibit a new approach which manipulates constructible sets represented by regular systems. We provide comparative benchmarks of different veri......
An effective scheduling scheme for multi-hop multicast in wireless mesh networks
Frontiers of Computer Science in China - Tập 4 - Trang 135-142 - 2010
With the utilization of concurrent transmission strategy, a throughput-enhanced scheduling scheme is devised for multicast service in wireless multi-hop mesh networks. Since the performance of a multicast mechanism is constrained in a wireless setting due to the interference among local wireless transmissions, the interference relationships are first characterized by introducing a graph transforma......
The use of mathematics in software quality assurance
Frontiers of Computer Science in China - Tập 6 - Trang 3-16 - 2012
The use of mathematics for documenting, inspecting, and testing software is explained and illustrated. Three measures of software quality are described and discussed. Then three distinct complementary approaches to software quality assurance are presented. A case study, the testing and inspection of a safety-critical system, is discussed in detail.
Modeling default risk via a hidden Markov model of multiple sequences
Frontiers of Computer Science in China - Tập 4 - Trang 187-195 - 2010
Default risk in commercial lending is one of the major concerns of the creditors. In this article, we introduce a new hidden Markov model (HMM) with multiple observable sequences (MHMM), assuming that all the observable sequences are driven by a common hidden sequence, and utilize it to analyze default data in a network of sectors. Efficient estimation method is then adopted to estimate the model ......
Indeterminacy-aware service selection for reliable service composition
Frontiers of Computer Science in China - Tập 5 - Trang 26-36 - 2010
With the development of Internet and Web service technology, Web service composition has been an effective way to construct software applications; service selection is the crucial element in the composition process. However, the existing selection methods mostly generate static plans since they neglect the inherent stochastic and dynamic nature of Web services. As a result, Web service composition......
Forecasting complex group behavior via multiple plan recognition
Frontiers of Computer Science in China - Tập 6 - Trang 102-110 - 2012
Group behavior forecasting is an emergent research and application field in social computing. Most of the existing group behavior forecasting methods have heavily relied on structured data which is usually hard to obtain. To ease the heavy reliance on structured data, in this paper, we propose a computational approach based on the recognition of multiple plans/intentions underlying group behavior.......
Improving bagging performance through multi-algorithm ensembles
Frontiers of Computer Science in China - Tập 6 - Trang 498-512 - 2012
Working as an ensemble method that establishes a committee of classifiers first and then aggregates their outcomes through majority voting, bagging has attracted considerable research interest and been applied in various application domains. It has demonstrated several advantages, but in its present form, bagging has been found to be less accurate than some other ensemble methods. To unlock its po......
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