The existing data mining methods are mostly focused on relational databases and structured data, but not on comp.ex structured data (like in extensible markup language (XML). By converting XML document type descriptio...
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The existing data mining methods are mostly focused on relational databases and structured data, but not on comp.ex structured data (like in extensible markup language (XML). By converting XML document type description to the relational semantic recording XML data relations, and using an XML data mining language, the XML data mining system presents a strategy to mine information on XML.
An image recognition method based on fuzzy-rough sets theory is proposed, and its implementation is discussed. The performance of this method as applied to ferrography image recognition is evaluated. It is shown that ...
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An image recognition method based on fuzzy-rough sets theory is proposed, and its implementation is discussed. The performance of this method as applied to ferrography image recognition is evaluated. It is shown that this method gives better results than fuzzy or rough-sets method when used alone.
We explore a new spectral representation of speech signals through group delay functions. The group delay functions by themselves are noisy and difficult to interpret owing to zeroes that are close to the unit circle ...
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We explore a new spectral representation of speech signals through group delay functions. The group delay functions by themselves are noisy and difficult to interpret owing to zeroes that are close to the unit circle in the z-domain and these clutter the spectra. A new modified group delay function that reduces the effects of zeroes close to the unit circle is used. Assuming that this new function is minimum phase, the modified group delay spectrum is converted to a sequence of cepstral coefficients. A preliminary phoneme recogniser is built using features derived from these cepstra. Results are comp.red with those obtained from features derived from the traditional mel frequency cepstral coefficients (MFCC). The baseline MFCC performance is 34.7%, while that of the best modified group delay cepstrum is 39.2%. The performance of the comp.site MFCC feature, which includes the derivatives and double derivatives, is 60.7%, while that of the comp.site modified group delay feature is 57.3%. When these two comp.site features are combined, 2% improvement in performance is achieved (62.8%). When this new system is combined with linear frequency cepstra (LFC) [2], the system performance results in another 0.8% improvement (63.6%).
This paper presents a simple comp.ete K-level tree (CKT) architecture for text database organization and rapid data filtering. A database is constructed as a CKT forest, and each CKT contains data of the same length. ...
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This paper presents a simple comp.ete K-level tree (CKT) architecture for text database organization and rapid data filtering. A database is constructed as a CKT forest, and each CKT contains data of the same length. The maximum depth and the minimum depth of an individual CKT are equal and identical to data's length. Insertion and deletion operations are defined;storage method and filtering algorithm are also designed for good comp.nsation between efficiency and comp.exity. The applications to comp.ter-aided teaching of Chinese and protein selection show that an about 30% reduction of storage consumption and an over 60% reduction of comp.tation may be easily obtained.
Given a nonsingular comp.ct 2-manifold F without boundary, we present methods for establishing a family of surfaces which can approximate F so that each approximant is ambient isotopic to F. The current state of the a...
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Given a nonsingular comp.ct 2-manifold F without boundary, we present methods for establishing a family of surfaces which can approximate F so that each approximant is ambient isotopic to F. The current state of the art in surface reconstruction is that both theory and practice are limited to generating a piecewise linear (PL) approximation. The methods presented here offer broader theoretical guidance for a rich class of ambient isotopic approximations. They are also used to establish sufficient conditions for an interval solid to be ambient isotopic to the solid it is approximating. The methods are based on global theoretical considerations and are comp.red to existing local methods. Practical implications of these methods are also presented. For the global case, a differential surface analysis is performed to find a positive number ρ so that the offsets Fo(±ρ) of F at distances ±ρ are nonsingular. In doing so, a normal tubular neighborhood, F(ρ), of F is constructed. Then, each approximant of F lies inside F(ρ). comp.risons between these global and local constraints are given.
It is a challenging problem to stream real-time video over heterogeneous networks with time-varying channel conditions and devices with different capabilities. In this paper, we present an FGS-based unicast video stre...
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It is a challenging problem to stream real-time video over heterogeneous networks with time-varying channel conditions and devices with different capabilities. In this paper, we present an FGS-based unicast video streaming test bed, which is now being considered by the MPEG-4/21 committee as a reference test bed. The proposed system supports resource adaptation delivery of MPEG-21 DIA scheme which leads to a more strict evaluation methodology according to the MPEG committee specified common test conditions for scalable video coding. It provides easy control of media delivery with duplicable network conditions. To provide the best quality of service for each client, we propose relevant rate control, error protection, and transmission approaches in the content server, network interface, and clients, respectively.
This paper investigates the stability problem of singular systems with saturation actuators. A Lyapunov method is employed to give the sufficient conditions for stability of closed-loop systems with saturation actuato...
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This paper investigates the stability problem of singular systems with saturation actuators. A Lyapunov method is employed to give the sufficient conditions for stability of closed-loop systems with saturation actuators. The controller is designed to satisfy the requirement for stability under the nonlinear saturation. In addition, a method is presented for estimating the domain of attraction of the origin.
We consider the problem of proving circuit lower bounds against.the polynomial-time hierarchy. We give both positive and negative results. For the positive side, for any fixed integer k > 0, we give an explicit Σ2...
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This paper describes a new approach for reducing the number of the fitness and constraint function evaluations required by a genetic algorithm (GA) for optimization problems with mixed continuous and discrete design v...
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ISBN:
(纸本)9781624101007
This paper describes a new approach for reducing the number of the fitness and constraint function evaluations required by a genetic algorithm (GA) for optimization problems with mixed continuous and discrete design variables. The proposed additions to the GA make the search more effective and rapidly improve the fitness value from generation to generation. The additions involve memory as a function of both discrete and continuous design variables, multivariate approximation of the individual functions' responses in terms of several continuous design variables. The approximation is demonstrated for the minimum weight design of a comp.site cylindrical shell with grid stiffeners.
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