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This article focuses on the nonlinear control issue of miniature Unmanned Aerial Vehicles(UAVs). A complete nonlinear model for miniature fixed-wing UAVs is structured and simplified as an affine nonlinear system aiming at the fast dynamic loop of key attitude control. We adopt the state feedback method to dynamic inversion controller design. To compensate the external disturbance and modeling error,...
An approach on modeling traversing features in concurrent software system was presented, which is based on aspect-oriented techniques and statecharts of unified modeling language (UML). Modeled with UML statecharts diagrams, the primary system functions and corresponding traversal features are enveloped into various orthogonal regions of a composite state respectively. The mutual relationships between...
To solve the power system multi-objective reactive power optimization problem better, the shortcomings of the current multi-objective reactive power optimization were analyzed. The vector evaluated adaptive immune particle swarm optimization (VEAIPSO) algorithm based on evaluation vector is applied to multi-objective reactive power optimization in this paper which provides an effective method for...
In recent years, the industry of vehicle-borne navigation develops rapidly. Navigation products appear constantly. The performance of products has significantly increased, such as accuracy, route guidance, sound and display. But they can only achieve path recognition. They are impossible to identify the driveway. Identifying the driveway will be a challenge for high precision navigation equipment...
An improved codebook model is presented to efficiently segment foreground from dynamic scenes in the paper. The model divides video frames into blocks and takes into account the spatial relations between pixels and the adjacent pixels in the blocks rather than seen the pixels independent. It uses the block means instead of pixel wises to construct codebooks. After comparison the brightness distortion...
The purpose of this study was to compare data collected via online surveys to via paper-and-pencil ones in mental health fields. Two groups of participants completed the Adult Adaptation Inventory (AAI) and Self-rating depression scale (SDS) either in online format or in paper-and-pencil format independently. Data collected via paper-and-pencil surveys had more missing data than Internet-based ones...
Applying image processing technologies to pedestrian detection has been a hot research topic in intelligent transportation systems (ITS). However, the existing video-based algorithms to extract background image may suffer their inefficiency in detecting slow or static pedestrians. To fill the gap, an improved Gaussian mixture model (GMM) for pedestrian detection is proposed in this paper. Three novel...
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