Resveratrol, a polyphenol compound with strong biological activity, has been widely used in medicine, health products and cosmetic industries. It is also the main active component of Polygonum cuspidatum, a well-known traditional Chinese medicine. We developed a simple and effective method for the preparation of resveratrol from P. cuspidatum. The whole preparative process consisted of reflux e...

Background Circumferential strain of the Left Ventricle gives valuable insights into regional myocardial function. This strain can be calculated from the density of radial taglines estimated by CIRCOME method [1], which benefits from direct use of tagline information in the frequency domain. CIRCOME exploits circular bandpass filters in order to selectively separate various frequencies in this ...

Atomic contact potentials are derived by statistical analysis of atomic surface contact areas versus atom type in a database of non-homologous protein structures. The atomic environment is characterized by the surface area accessible to solvent and the surface of contacts with polar and non-polar atoms. Four types of atoms are considered, namely neutral polar atoms from protein backbones and fr...

In the Shannon lecture at 2019 International Symposium on Information Theory (ISIT), Arikan proposed to employ a one-to-one convolutional transform as pre-coding step before polar transform. The resulting codes of this concatenation are called polarization-adjusted (PAC) . scheme, pair mapper and demapper pre- post- processing devices deployed around memoryless channel, which provides polarized...

In this study, the effect of thermal radiation on micro-polar fluid flow over a wavy surface is studied. The optically thick limit approximation for the radiation flux is assumed. Prandtl’s transposition theorem is used to stretch the ordinary coordinate system in certain directions. The wavy surface can be transferred into a calculable plane coordinate system. The governing equations of micro-...

The real and imaginary parts are proposed as an alternative to the usual Polar representation of complex-valued images. It is proven that the transformation from Polar to Cartesian representation contributes to decreased mutual information, and hence to greater distinctiveness. The Complex Scale-Invariant Feature Transform (CSIFT) detects distinctive features in complex-valued images. An evalua...

We present a novel local-based face verification system whose components are analogous to those of biological systems. In the proposed system, after global registration and normalization, three eye regions are converted from the spatial to polar frequency domain by a Fourier-Bessel Transform. The resulting representations are embedded in a dissimilarity space, where each image is represented by...

In the paper an algorithm for the recognition of erythrocytes is presented and experimentally evaluated. The objects of interest are localised and extracted from digital microscopic images, stained by means of the MGG (May-Grunwald-Giemsa) method in greyscale. The area covering a single red blood cell (RBC) is transformed from Cartesian to polar co-ordinates. Later, the two-dimensional Fourier ...

Farsi Handwriting Word Recognition (FHWR), especially those with different orientation and scale changes as well as different handwriting style, is a challenging and important problem in document image analysis. This paper proposes a holistic FHWR scheme using local features of M-Band packet wavelet. The rotation and scale invariant local feature extraction for a given word image involves apply...

Robotic system often use simultaneous localization and mapping method in their operations. Most of the calculation stored as a nested array with multiple level and dimension. SLAM data contains robot movement, object detection and relation between them. This system visualize SLAM data into a map containing robot historical position, object position and relation between object and robot that sho...