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A fast warning response to an impending crash based on vision/GPS sensing together with V2V communication has been realized to achieve line marking recognition, neighboring vehicles detection, and headway estimation, where a distributed embedded dual-platform DaVinci+XScale-NAV270 was built to improve system effectiveness as well as a data fusion QT-BPNN/ANFIS was applied to dissolving the heterogeneous...
In this paper, a pixel based pseudo coloring is presented. The proposed approach consists of two parts: luminance matching and pixel coloring. Given a monochrome input image and a color reference image, luminance matching between the two images is performed. If there is no matching between, a interpolation scheme is used to interpolate the chromatic histograms of reference image. By this doing, it...
We proposed a visual cryptography scheme based on Tu and Houpsilas visual cryptographic method to enhance the contrast and visibility for gray-level images. With more detailed distribution of codebooks, we could get good identification for those vertical edges of secret image. Especially, the smaller the image size, the better the contrast. Besides strengthening the reorganization, ours proposed scheme...
This study investigates the instability phenomena of an active power factor corrector (PFC) circuit based on a buck-boost converter. First, the circuit is analyzed, and the state space mathematical model of the converter is derived. Second, Matlab/Simulink and IsSpice are used to construct and simulate the voltage-mode control model of the buck-boost power factor corrector. The intermediate-scale...
An instance of complex networks, student networks (SN), is mainly studied in this paper. Dynamic properties of SN were firstly studied and an improved Logistic Model was put foreword and was optimized by float-point GA. Then, fractal methods were applied to the study of dynamic growth of SN, and fractal algorithm were introduced and applied. A conclusion that the growth of SN has some features of...
In this paper, the generics DAO schema is introduced into the lightweight J2EE application architecture based on open source framework of Spring, Hibernate and Struts. The data access code is enabled to offer the type-safe interface, which can avoid compulsory type conversion that belongs to the fallible repetitive development. The architecture scheme is applied to the development of the network teaching...
In order to improve the speaker recognition accuracy, the pitch is applied to GMM-based speaker recognition (SR). The circular average magnitude difference function (CAMDF) method is used to extract the pitch. An endpoint detection method based on the pitch is proposed. The following four features are selected as the features of the SR: the mel-frequency cepstral coefficient (MFCC) based on the pitch,...
A number of researches have explored the effect of embodied pedagogical agents in multimedia learning environments. Embodied pedagogical agents have been regarded as practical and powerful tools for instructions in these researches. However, it is hard to find a development kits that support the instructor or teacher to create interactive learning applications together with animated pedagogical agents...
This paper proposed a machine learning approach for analyzing teacherspsila expert knowledge of classifying studentspsila piano performance into approximate expression categories. Students are usually confused when learning the expressive performance because of teacherspsila subjective intention difference on the same performance. In this paper, teacher models was built by analyzing teacherspsila...
Traditional model driven architecture (MDA) approaches to software application development are appropriate for building systems with visual user interfaces. However, they are not suitable for designing of dialog systems. A more effective approach to modeling and transforming these complex characters of dialog systems is required. In this paper, we present a model-driven approach which first constructs...
The factors such as manufacturing technology, manufacturing resource, product architecture and so on, influence on the function of CAPP system greatly. Different CAPP systems need to be developed for different manufacturing enterprises, their function and application range are restricted severely, so the traditional CAPP systems lack for the agility and dynamic adaptability under the different production...
This paper proposes a design and implementation scheme of a NE2000 compatible Ethernet interface for embedded system based on ARM7 and RTL-8019 NIC(network interface controller) hardware platform. The design aims at the characteristics that the embedded system only has limited resources and reduced any unnecessary operation process. The logic structure,operation principle and DMA controller data sending...
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