Proper orthogonal decomposition of solar photospheric motions.

Segmentation of Photospheric Solar Images by Using c-Means,k-Means, and FCM Algorithms

Heat Transfer Enhancement of a Flat Plate Boundary Layer Distributed by a Square Cylinder: Particle Image Velocimetry and Temperature-Sensitive Paint Measurements and Proper Orthogonal Decomposition Analysis

The current empirical study was conducted to investigate the wall neighborhood impact on the two-dimensional flow structure and heat transfer enhancement behind a square cylinder. The low- velocity open-circle wind tunnel was used to carry out the study tests considering the cylinder diameter (D)-based Reynolds number (ReD) of 5130. The selected items to compare were different gap he...

Visualization and Interpretation of the Proper Orthogonal Decomposition of Bat Wing Kinematics

Bat skeletons and their intricate musculature and nervous control have the potential to produce an enormous array of wing postures, and although only some fraction of the possibilities are realized during steady forward flight, there are no obvious guidelines to suggest optimal ways to describe this complexity. Here, we employ the Proper Orthogonal Decomposition to kinematically analyze bat fli...

Numerical Simulations of Helicity Condensation in the Solar Corona

The helicity condensation model has been proposed by Antiochos (2013) to explain the observed smoothness of coronal loops and the observed buildup of magnetic shear at filament channels. The basic hypothesis of the model is that magnetic reconnection in the corona causes the magnetic stress injected by photospheric motions to collect only at those special locations where prominences form. In th...

Physical Interpretation of the Proper Orthogonal Modes Using the Singular Value Decomposition

Proper orthogonal decomposition is a statistical pattern analysis technique for "nding the dominant structures, called the proper orthogonal modes, in an ensemble of spatially distributed data. While the proper orthogonal modes are obtained through a statistical formulation, they can be physically interpreted in the "eld of structural dynamics. The purpose of this paper is thus to provide some ...