Abstract This study is to investigate the stall flutter of high-speed rotating blade section small-scale blades subjected combined flap-lag motion. The work motivated by destructive flapwise vibrations blades. aeroelastic governing equations combine a spring-mass-damper equivalent structure and nonlinear aerodynamic model suitable for pure pitching resulting are solved linearization time-marchi...

     The quadratic loss function has been used by decision-theoretic statisticians and economists for many years.  In this paper  the estimation of scale parameter under a bounded loss function, which is adequate for assessing quality and quality improvement, is considered with restriction to the principles of invariance and risk unbiasedness. An implicit form of minimum risk scale equivariant ...

This paper addresses the generation of aircraft emergency trajectories with obstacle avoidance. After presenting in detail fast marching tree algorithm, this we propose an improvement its performance. First, free space checking function is sped up. Then, algorithm used twice, firstly sampling a few points to generate approximate trajectory, and secondly close first computed trajectory refine it...

Background/Objective: White matter tractography is a non-invasive method, which reconstructs three-dimensional trajectories of the brain tracts using diffusion-tensor imaging (DTI) data. Due to the partial volume effect of DTI data, some of tractography algorithms are unable to follow the correct pathways after the crossing and branching regions. The main challenge for tractography methods has ...

This paper finds sufficient conditions to determine a surface whose mean curvature along given Smarandache curve is constant in three-dimensional Lie group. accomplished by using the Frenet frames of specified express surfaces that span TN, NB, and TB curves parametrically. In terms curvatures curves, marching scale functions, their partial derivatives, these are determined. Sufficient found ma...

lsosurface extraction is a colrirnon analysis and visualization technique for tllrec-dirne~ls ior)al sc.a]ar data. Marc.]iing (hlt)cs k the Inost cow)rno~lly-used a]gorit]lm for fl]lding ~)o]ygona] reprcm)itatiolls of isosurfaces in such data. We extc]ld hflarching 011.)es to produce geometry f o r data scis that lie in spherical and cylirldric.al coordi]]atc syskns as well as show the ste]w fo...

Recently, graph cuts algorithms have been used to solve variational image restoration problems, especially for noise removal and segmentation. Compared to time-marching PDE methods, graph cuts based methods are more efficient and able to obtain the global minimizer. However, for high resolution and large-scale images, the cost of both memory and computational time increases dramatically. In thi...

In this study, the parametric equation of hypersurfaces passing through spacelike and timelike curves that has non-null Frenet vectors in E_1^4 Lorentz Minkowski space was expressed with help curve is frame. Furthermore, hypersurface families were created by giving necessary sufficient conditions so on common isoasymptotic hypersurface. Then, these obtained deviation marching-scale functions si...