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The positioning of agricultural vehicle for autonomous navigation systems is important. We proposed a novel simple and inexpensive positioning system utilized by four artificial landmarks and an omni directional vision sensor. The red intensity pixels not less than threshold were extracted as a small area in the omni directional image and the center of the gravity was calculated as one landmark position...
This work presents a spectrally accurate method for electromagnetic scattering from objects with complex permittivity embedded in a layered medium. Two-dimensional (2D) layered medium Green's functions are computed adaptively by using Gaussian quadratures. The singular terms in the Green's functions and the non-smooth terms in their derivatives are handled appropriately to achieve exponential convergence...
Recently, a new concept of rotation scanning synthetic aperture interferometric radiometer (RS-SAIR) has been receiving more and more attentions for its advantage of much simpler configuration with looser requirements of antenna elements. In this article, we investigate the imaging theory of RS-SAIR, and introduce the pseudo-polar FFT algorithm to deal with the polar u-v samples. It only involves...
With the trend of global economic integration, strengthening economic and trade exchanges between different countries, the economic value of products of designations of origin increased. Fourteen trace elements of soil and plants samples were determined by ICP-AES. The accuracy of method was between 0.76% and 8.46%, and the precision was 0.15%~8.1%, and the detection limits of elements determined...
Summary form of only given: A parallel high precision integration (HPI) scheme combined with the spectral element method (SEM) is presented to solve the time-dependent Maxwell's equations. The vector spectral elements are employed for spatial discretization, and a parallel HPI scheme based on matrix exponential and time domain segmentation is proposed for solving the semi-discretized system by SEM...
In this paper, feature selection is used to allow the identification of critical attributes before the reconstruction of occluded data in 3d human motion classification. This work presents Fuzzy Laplace Similarity: a new fuzzy similarity relation used in the context of fuzzy rough feature selection. The measure of similarity is critical to the performance of the selection phase, which in turn will...
This paper presents the development of a novel application using motion analysis techniques to measure tooth movement in 3D space. Measuring the relative displacements of teeth under load allows a greater understanding of the mechanical properties of the periodontal ligament (PDL). Two marker clusters were fixed onto the measured tooth and the reference tooth via orthodontic brackets and movements...
To consider time varying system operating conditions and operating reserve units, the online short-term reliability of a power system is investigated. Real-time system reliability based on the online operation data provided by the SCADA/EMS/WAMS is assessed using time- dependent state probabilities of components. Considering both speed and accuracy requirements, a fast sorting technique (FST) is proposed...
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