Discrete filtering of information over triangulated surfaces has proved very useful in computer graphics applications. This technique is based on diffusion equations and has been extensively applied to image processing, harmonic map regularization and texture generating, etc. [C. L. Bajaj and G. Xu, ACM Trans. Graph., 22 (2003), pp. 4–32], [C. Wu, J. Deng, and F. Chen, IEEE Trans. Vis. Comput. ...

In this paper, an algorithm for preprocessing of PSK - signals based on wiener filtration is proposed. The aim to extract the phase discontinuities when filtering harmonic filling a signal. This method allows us avoid compensation unknown frequency shift in problems determining time delay during multichannel propagation. study checks conditions applicability and its stability noise level observ...

Abstract Electrical impedance tomography (EIT) has the potential for monitoring perfusion in addition to respiration on bedside. Several separation methods were reported, e.g. Filtering, ECG-gating and PCA. However, is not trivial, which why harmonic analysis was introduced EIT data analysis. It based several assumptions therefore prove of plausibility necessary. In this contribution a two-dime...

Nowadays, AC charging piles are widely used, and with the increasing number of piles, harmonic pollution generated by them becomes more serious affects power quality grid. Aiming at problem control single-phase pile, it is decided to apply active filter technology. The parallel (PAPF) selected according characteristics pile. single detection method studied based on instantaneous reactive theory...

The proliferation of variable frequency drives (VFDs) has brought increased attention to harmonic effects created by drives. A standard 6-pulse drive without any harmonic mitigation technology may interfere with neighboring equipment, reduce equipment life, and negatively impact the utility power quality. Under some circumstances the total harmonic current distortion (THID) may approach the lev...

Microgrids (MGs) offers grid-connected (GC) and islanded (ID) operational modes. However, these dynamic modes of operation pose different microgrid protection challenges. This paper presents a new method for MGs based on discrete one-dimensional recursive Median filter (1-DRMF). In the first step, 1-DRMF is applied measured current signal every single phase individually targeted feature extract...

The two-sample phase locked loop (2S PLL) in single-phase digitally controlled grid-connected power converters provide synchronization with a minimal computational burden. However, the distortion of grid voltage deteriorates performance 2S quadrature signal generator. To solve this issue, article introduces harmonic filtering (HF) structure based on observers input for fundamental and selected ...