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This paper presents a novel approach for automatic visual speech recognition using Convolutional VEF snake and canonical correlations. The utterance image sequences of isolated Chinese words are recorded with a head-mounted camera, and we use Convolutional VEF snake model to detect and track lip boundary rapidly and accurately. Geometric and motion features are both extracted from lip contour sequences...
According to current application of the power system communication services and communication technology and network structure, a mathematical method of safety and risk assessment of electric power communication services is carried out. Considering the typical topology SDH transmission system network which is used widely in power system, this paper introduces the concept of the safety classification,...
In this paper, we present a framework to recognize facial expressions from image sequences. Our method uses optical flow to track feature points in sequential facial frames, and computes normalized displacements of key feature points and certain standardized geometric distances to form a matrix, called facial-expression-arising-dataset (FEAD). Each FEAD represents an expression image sequence (from...
Industry products in production line need to be printed characters on them. In order to prevent the mistakes of printed characters, the computer vision system is commonly used to recognize the characters on products. Conventional segmentation method cannot correctly separate the characters under the condition of touching characters. In this paper a new method is proposed, which rotates the character...
Recently, there are some problems like complex system, large weight of pumping high-temperature pipe and easily damaged heat preservation on three media desiccation of large scale fan mill direct firing pulverizing system. Directed towards these problems, adopting water-cooled high temperature furnace gas pipe to adjustment high gas temperature is proposed, to change three media desiccation into two...
The calculation method of steam turbine's stage off-design conditions is an effective means to realize the security and economical efficiency, but at present, research on the calculation method of governing stage off-design conditions in consideration of overlap degree seldom can be found in documents. In order to ensure the lift-flow characteristic curve of governing valve is a continuous smooth...
In this paper, a half-bridge single-stage power converter is used as a fundamental study object. The half-bridge single-stage power converter proposed in this thesis has inherent gift of high power factor correction (PFC) even when the PFC inductor operates in discontinuous conduction mode (DCM). It is revealed that if the proposed converter is operating in DCM, it not only inherently has high power...
An approach based on selective smoothing direction gradient vector flow (SSDGVF) snake model incorporating shape prior is proposed to segment the left ventricle from cardiac MR images in this paper. The originalities of the presented method include SSDGVF algorithm, automatic localization of the cardiac endocardium contour, and elliptic shape constraint. This novel approach can overcome the unexpected...
This paper addresses energy measurement audit in coal-fired power plant. Energy audit, as an effective energy-saving and emission-reducing measure, was launched in thousands of high energy-consuming enterprises in China in 2006. The big part of energy audit is energy measurement audit. In this paper, the work center of energy measurement is obtained by analyzing the contents and characteristics of...
An improved observer-based robust adaptive variable universe fuzzy control is proposed in this paper. The structure of fuzzy system is on-line tuned by the dynamic self-structure method except scaling gains adjusted by adaptive laws. The global stability of the resulting closed-loop system is also guaranteed. The proposed controller has not only simplified design for the initial structure of fuzzy...
The vehicular ad hoc network (VANET) is an emerging new technology and is a promising approach for the intelligent transportation system (ITS). In comfort and safety applications, a vehicle may need to query data from another vehicle via multihop communications. Data routing in the VANET environment suffers from frequent disconnections due to high mobility and sparsely connected networks. Data delivery...
A range of issues often appear in current on-line courses selection system, such as systems crowded, excessive workload and so on. The paper seeks to construct a highly reliable courses selection system based on mainframe to address these issues. This paper boldly tried to combine mainframe technology with Web technology, use mainframe??s high reliability, high stability, and high concurrency of CICS??s...
In software testing and maintenance activities, the observed faults and bugs are reported in bug report managing systems (BRMS) for further analysis and repair. According to the information provided by bug reports, developers need to find out the location of these faults and fix them. However, bug locating usually involves intensively browsing back and forth through bug reports and software code and...
In this paper, the mechanism and form of ionospheric multipath effect in skywave over-the-horizon radar has been described firstly. According to its various forms, a scheme based on validating region adaptive determination and energy-weighted data association in data processing algorithm has been proposed to eliminate the multipath effect, and its performance is evaluated simply. In an integrated...
Determining the propagation modes of high-frequency radar ray within the ionosphere and extracting their corresponding information quickly are quite important for over-the-horizon radar system. In general, the diagnosis to the ionosphere is implemented with special equipments. The equipments, often called ionosondes, have a capability of sounding over the full HF band and the whole illumination area...
Due to the relatively coarse resolution in range and azimuth, low detection probability, various clutters or interferences, and time-varying ionospheric propagation channel, the measurements of targets collected from Over-The-Horizon Radar(OTHR) has much uncertainty. Furthermore, ambiguity on target returns derived from the ionospheric multimode propagation effect makes data association and tracking...
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