نتایج جستجو برای: concave surface

تعداد نتایج: 643239  

1961
Kenneth J. Arrow Alain C. Enthoven J. ARROW ALAIN C. ENTHOVEN H. W. Kuhn

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Journal: :The Electronic Journal of Combinatorics 2011

2000
Keiji Goto Toyohiko Ishihara

1. INTRODUCTION Recently, the studies on the scattering of electromagnetic waves by a cylindrically curved conducting open surface are becoming an important subject for a variety of applications [1]-[4]. When the geometrical ray or the creeping wave is incident on the edge of the cylindrically curved conducting open surface, the geometrical rays and the whispering gallery modes, which cling to ...

Journal: :Nanoscale 2015
Haibin Zhang Yonggang Lu Hong Liu Jingzhong Fang

AgCl semiconductor nanocrystals (NCs) with trapezohedral (TPH) and concave hexoctahedral (HOH) structures have been successfully synthesized for the first time in high yield by a direct one-pot solvothermal method. The as-prepared TPH, concave HOH AgCl NCs with unconventional polyhedral shapes and smooth surfaces were enclosed by 24 high-index {311} facets and 48 high-index {15 5 2} facets, res...

Journal: :Journal of the Mathematical Society of Japan 1953

Journal: :Journal of fluids engineering 2015
Mahshid Mohammadi Kendra V Sharp

This paper highlights the influence of contact line (pinning) forces on the mobility of dry bubbles in microchannels. Bubbles moving at velocities less than the dewetting velocity of liquid on the surface are essentially dry, meaning that there is no thin liquid film around the bubbles. For these "dry" bubbles, contact line forces and a possible capillary pressure gradient induced by pinning ac...

2002
Takashi Machida Naokazu Yokoya

In mixed reality, it is important to estimate object surface reflectance properties to render real objects under arbitrary illumination conditions. The authors developed a method to estimate reflectance properties of object surfaces densely. However, it was difficult to estimate surface reflectance properties faithfully for objects with interreflections. This paper describes a new method of den...

Journal: :Journal of the American Chemical Society 2005
Qihui Shi Jianfang Wang Michael D Wyrsta Galen D Stucky

Micropatterning has important applications in a wide range of areas, including microelectronics, optics, information displays, and biotechnology. Herein, we describe a vesicle-array templating approach for the generation of surface patterns of micrometer-sized silica features on the surfaces of silica monoliths. The approach makes use of tetraethyl orthosilicate as silica precursor, a poly(ethy...

2001
Juan A. Carretero Meyer A. Nahon Ou Ma

Determining the minimum distance between two convex objects is a problem that has been solved using many di¤erent approaches. Some methods rely on computational geometry techniques, while others rely on optimization techniques to ...nd the solution. Some fast algorithms sacri...ce precision for speed while others are limited in the types of objects that they can handle (e.g. linearly bound obje...

1997
G. Elber

Results from analyzing the curvature of a surface can be used to improve the implementation, e ciency, and e ectiveness of manufacturing and visualization of sculptured surfaces. In this paper, we develop a robust method using hybrid symbolic and numeric operators to create trimmed surfaces each of which is solely convex, concave, or saddle and partitions the original surface. The same method i...

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