نتایج جستجو برای: surface complexities include topographic variations

تعداد نتایج: 1142498  

2003
A. R. Sarid H. V. Frey J. H. Roark

Introduction: Deciphering the cratering record on Mars has been challenging because it may reflect the changes in both the population of impactors and in the resurfacing processes on Mars. However, it is possible to determine the breadth of impactors captured in the cratering record. Extensive areas of resurfacing are of particular interest because they likely contain material from various ages...

2008
Eric Kwabena Forkuo Kwame Nkrumah

Digital terrain models (DTMs) in recent times have become an integral part of National Spatial Data Infrastructure (NSDI) of many countries world-wide due to their invaluable importance. DTMs play a major role in hydrologic modeling, sediment transport, soil erosion estimation, drainage basin morphology, vegetation, and ecology. DTM generation however has a setback of high cost of primary data ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2012
Zhiyang Dai Wei Wang Lianxing Wen

Compressional seismic wave reflected off the Earth's inner core boundary (ICB) from earthquakes occurring in the Banda Sea and recorded at the Hi-net stations in Japan exhibits significant variations in travel time (from -2 to 2.5 s) and amplitude (with a factor of more than 4) across the seismic array. Such variations indicate that Earth's ICB is irregular, with a combination of at least two s...

2007
FAROUK EL-BAZ J. F. MCCAULEY

Relations of landform types to wind regimes, bedrock composition, sediment supply, and topography are shown by field studies and satellite photographs of the Western Desert of Egypt. This desert, which lies at the core of the largest hyperarid region on earth, provides analogs of Martian wind-formed features. These include sand dunes, alternating light and dark streaks, knob 'shadows,' and yard...

Journal: :Planetary and Space Science 2021

The topographic correction of satellite images has to be applied both disentangle albedo features from illumination effects induced by local topography and perform spectrophotometric analyses planetary surfaces. This work focuses on the modeling removal surface brightness variations topography, referred as shading, high resolution Mars. Topographic shading can modeled through functions observat...

1998
Andreas Schilling Reinhard Klein

Surface reconstruction from contours is an important problem especially in medical applications. Other uses include reconstruction from topographic data, or isosurface generation in general. The drawback of existing reconstruction algorithms from contours is, that they are relatively complicated and often have numerical problems. Furthermore, algorithms to generate multiresolution surface model...

2015
Margaret A. Rosenburg Oded Aharonson

Impact cratering produces characteristic variations in the topographic power spectral density (PSD) of cratered terrains, which are controlled by the size-frequency distribution of craters and the spectral content (shape) of individual features. These variations are investigated here in two parallel approaches. First, a cratered terrain model, based on Monte Carlo emplacement of craters and ben...

Journal: :Journal of the Japan Society of Precision Engineering 1975

Journal: :Vision Research 2002
Greg A. Woodbury Rick van der Zwan William G. Gibson

We describe a modification to a standard correlation model for the development of the geniculocortical projection that relays visual input to the visual cortex. The modification is to include threshold-activation of cortical cells as opposed to linear activation and it is shown that this can account for topographic map refinement (TMR). This contrasts with other models that require cortical cel...

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