نتایج جستجو برای: surface mount technology

تعداد نتایج: 1091159  

2010
R. E. Parks Peng Su Chang Jin Oh J. H. Burge

INTRODUCTION In optical surface metrology the reference surface is usually self-calibrated against the part under test because the errors in the reference are of the same order as those in the part under test. The self-calibration, or “absolute test”, is typically done by making three interferometric measurements, an initial measurement and then two more with the part under test shifted lateral...

2005
Rick Lawrence

The variety of disturbance mechanisms involved in the 1980 eruption of Mount St. Helens (e.g., heat, burial, and impact force) and the resulting diversity of vegetation responses have provided abundant opportunities for disturbance-zone-specific research (Frenzen 1992; Frenzen et al. 1994). As evidenced by the research reported in this volume, tremendous amounts of knowledge can be acquired fro...

2004
Stephen H. Westin Hongsong Li Kenneth E. Torrance

We present a principled approach to selecting a surface reflectance model and setting its parameters. The approach is based on fundamental physical principles, comparisons between different models, and practical insight into the characteristics of real surfaces. Four models of surface reflectance were evaluated by comparing them with physical measurements on five different sample surfaces. Conc...

2016
K. Wudy D. Drummer

The high process temperatures in combination with long building times during the laser sintering process lead to chemical and physical aging mechanisms on the polymeric feed material. The unmolten partcake material, which acts as a supporting structure, can be removed after each building process and reused for further processes. However, material as well as bulk properties are changed due to th...

2017
J. Schmale Jodi Schneider T. Jurkat C. Voigt H. Kalesse M. Rautenhaus M. Lichtenstern H. Schlager Gérard Ancellet F. Arnold J. Schneider G. Ancellet M. Gerding I. Mattis M. Wendisch S. Borrmann

2007
Charles DiMarzio Mieczyslaw M. Kokar

In this work, we present a methodology for fusing high frequency and low frequency radar images. The goal of this system is to nd the strong surface clutter which is common to high and low frequency radar images and to subtract (defuse) this common component from the low frequency image to extract sub-surface information.

2002
George Kamberov Gerda Kamberova

A new technique for computing the differential invariants of a surface from 3D sample points and normals. It is based on a new conformal geometric approach to computing shape invariants directly from the Gauss map. In the current implementation we compute the mean curvature, the Gauss curvature, and the principal curvature axes at 3D points reconstructed by area-based stereo. The differential i...

1977
J. R.

RESTRICTIONS on the quasi-static extension, or healing, of Griffith cracks are developed in the framework of irreversible thermodynamics. It is emphasized that thermodynamics requires that (G 2r)I > 0, where i is crack speed, G the Irwin energy release rate, and 2y the work of reversible separation of the surfaces to be fractured. Implications for ‘lattice trapping’ models of cracks and for the...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید