نتایج جستجو برای: circular cone optimization

تعداد نتایج: 423658  

Journal: :Optimization Letters 2015
Xinhe Miao Jein-Shan Chen

In this paper, we consider a type of cone-constrained convex program in finitedimensional space, and are interested in characterization of the solution set of this convex program with the help of the Lagrange multiplier. We establish necessary conditions for a feasible point being an optimal solution. Moreover, some necessary conditions and sufficient conditions are established which simplifies...

Journal: :Applied optics 2004
Thayyullathil Hemanth Langoju Rajesh Renganathan Padmaram R Mohan Vasu Kanjirodan Rajan Lalit M Patnaik

We report experimental results of quantitative imaging in supersonic circular jets by using a monochromatic light probe. An expanding cone of light interrogates a three-dimensional volume of a supersonic steady-state flow from a circular jet. The distortion caused to the spherical wave by the presence of the jet is determined through our measuring normal intensity transport. A cone-beam tomogra...

Journal: :International Conference on Aerospace Sciences and Aviation Technology 1999

Journal: :Math. Program. 2015
Javier Peña Juan Carlos Vera Luis Fernando Zuluaga

Polynomial optimization encompasses a very rich class of problems in which both the objective and constraints can be written in terms of polynomials on the decision variables. There is a well established body of research on quadratic polynomial optimization problems based on reformulations of the original problem as a conic program over the cone of completely positive matrices, or its conic dua...

Journal: :SIAM J. Imaging Sciences 2015
Minji Lee Yoseob Han John Paul Ward Michael Unser Jong Chul Ye

To address the classic interior tomography problem where projections at each view extend only to the shadow of a circular region completely interior to the subject being scanned, previously we showed that the exact recovery of twoand three-dimensional piecewise smooth images is guaranteed using a one-dimensional generalized total variation seminorm penalty which allows a much faster reconstruct...

2005
Jin-lin Han

We update the systematic studies of circular polarization in integrated pulse profiles by Han et al (1998). Data of circular polarization profiles are compiled. Sense reversals can occur in core or cone components, or near the intersection between components. The correlation between the sense of circular polarization and the sense of position angle variation for conal-double pulsars is confirme...

Journal: :Medical physics 2011
T Varslot A Kingston G Myers A Sheppard

PURPOSE In this paper we show that optimization-based autofocus may be used to overcome the instabilities that have, until now, made high-resolution theoretically-exact tomographic reconstruction impractical. To our knowledge, this represents the first successful use of theoretically-exact reconstruction in helical micro computed tomography (micro-CT) imaging. We show that autofocus-corrected, ...

Journal: :journal of advances in computer engineering and technology 0
hossein barghi jond ahar branch, islamic azad university, ahar, iran adel akbarimajd faculty of electrical engineering, university of mohaghegh ardabili, ardabil, iran nurhan gürsel özmen department of mechanical engineering, karadeniz technical university, trabzon, turkey. sonia gharibzadeh ahar branch, islamic azad university, ahar, iran

this paper aims to discuss the requirements of safe and smooth trajectory planning of transporter mobile robots to perform non-prehensile object manipulation task. in non-prehensile approach, the robot and the object must keep their grasp-less contact during manipulation task. to this end, dynamic grasp concept is employed for a box manipulation task and corresponding conditions are obtained an...

2013
James Andrews Carlo H. Séquin

Introduction Efficient fitting of quadric surfaces to unstructured point clouds or triangle meshes is an important component of many reverse engineering systems [6]. Users may prefer a given surface be fit by a specific quadric type: for example, they may want to ensure the quadric is a cone, ellipsoid, or a rotationally-symmetric subtype (spheroid, circular cone, etc). Methods for type-specifi...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2011
Jin W Wang

This paper revisits one of the puzzling behaviors in a developable cone (d-cone), the shape obtained by pushing a thin sheet into a circular container of radius R by a distance η. The mean curvature was reported to vanish at the rim where the d-cone is supported. We investigate the ratio of the two principal curvatures versus sheet thickness h over a wider dynamic range than was used previously...

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