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Image registration for stack-based HDR photography is challenging. If not properly accounted for, camera motion and scene changes result in artifacts in the composite image. Unfortunately, existing methods to address this problem are either accurate, but too slow for mobile devices, or fast, but prone to failing. We propose a method that fills this void: our approach is extremely fast—under 700ms...
In this paper, equivalence principle algorithm (EPA) with grid-robust higher order vector basis (GRHOVB) is proposed to solve the multi-scale problems. The EPA is a kind of domain decomposition method which transfers the interaction of the objects into interaction between virtual equivalence surfaces. Compared with traditional Curvilinear Rao-Wilton-Glisson (CRWG) function, GRHOVB can be used on the...
In this paper we mainly focus on the design of updated laws for the coefficients in PID controllers for a class of second-order nonlinear systems. Fuzzy logic systems have the advantages in approximating nonlinear uncertain functions, furthermore, the consequent of a Takagi-Sugeno(TS, for short) fuzzy model contains the linear combination of the base functions with input signals which makes it feasible...
The equivalence principle algorithm (EPA) is a kind of domain decomposition scheme for the electromagnetic scattering and radiation problems based on integral equation (IE). This method is suited for solving multi-scale problems and array structures with same elements. However, the original EPA can lead to a loss of accuracy in some cases. Compared with the EPA, Tangential EPA (T-EPA) has the better...
Recommender system is one of the most effective technologies to deal with information overload, which has been used in a lot of business systems. Historically, many recommender systems take much focus on prediction accuracy. However, despite their pretty accuracy, they may not be useful to users. A user's preference is full of uncertainty, including randomness and fuzziness. Unfortunately, a fixed...
High spectral resolution, high spatial resolution and high temporal resolution are the development trend of modern remote sensing technology. In the case of same image data, it is difficult to obtain high spatial resolution and hyperspectral remote sensing data information simultaneously. This weakness can be remedied, the quality of the image can be improved and the useful thematic information also...
This paper presents a fast solution of electromagnetic scattering problems using the volume integral equation (VIE) combined with the integral equation fast Fourier transform (IE-FFT). The tetrahedron cells are used to model the geometry of the scatterer and the Schaubert-Wilton-Glisson (SWG) basis function is used to expand the electric flux density. A floating stencil topology is introduced to reduce...
In modern CNC machining, the interpolation of complex profile curve with high speed and high accuracy is required. Based on B spline curve theory, a revised algorithm of cubic B spline curve interpolation is presented in the paper. This proposed algorithm gives a new method which is based on pre-judgment of machining feedrate to calculate the tangent vectors of spline curve junction. The tangential...
To further expedite solution of electromagnetic scattering from conducting structures with slots, a novel improved electric field integral equation (IEFIE) is developed to reduce the iteration time in multilevel fast multipole algorithm (MLFMA). By adding the principal value term of magnetic field integral equation (MFIE) operator on the both sides of the EFIE operator, a well-conditioned improved...
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