نتایج جستجو برای: mars modeling

تعداد نتایج: 402551  

2006
R. L. Kirk

We demonstrate that the freely available USGS planetary cartography software package ISIS and the commercial photogrammetric software SOCET SET jointly provide a complete environment for the processing of Mars Express High Resolution Stereo Camera (HRSC) images. Capabilities include bundle adjustment, automated production and interactive editing of stereo digital terrain models (DTMs), orthomos...

Journal: :Computers & OR 2007
Cristiano Cervellera Aihong Wen Victoria C. P. Chen

Dynamic programming is a multi-stage optimization method that is applicable to many problems in engineering. A statistical perspective of value function approximation in highdimensional, continuous-state stochastic dynamic programming (SDP) was first presented using orthogonal array (OA) experimental designs and multivariate adaptive regression splines (MARS). Given the popularity of artificial...

2008
Terry Huntsberger Abhi Jain Jonathan Cameron Gail Woodward David Myers Garett Sohl

As the duration of rover missions increases (the Mars Exploration Rovers are each currently beyond 1370 sols on the Martian surface), a wider variety of terrain types (slopes, soil types, etc) will usually be accessed. It is extremely important that a simulation environment used for flight systems has the necessary fidelity to model rover mobility on sloped, uneven terrain such as that encounte...

2010
Margareta Heilmann Martin Wagner M. Heilmann M. Wagner

The purpose of this paper is the investigation of strong converse results for Bernstein-Durrmeyer operators and their quasi-interpolants. For lower dimensions we improve known results by Knoop and Zhou [16] and Chen, Ditzian and Ivanov [5] in regard to the constants in their estimates and prove a strong converse theorem of type B for the quasi-interpolants introduced by Berdysheva, Jetter and S...

2006
Heng Yang Victor P. Pasko Yoav Yair

[1] The conducting ionosphere and conducting surface of Titan, Venus, and Mars form a concentric resonator, which would support the possibility of the existence of global electromagnetic resonances. On Earth, such resonances are commonly referred to as Schumann resonances and are excited by lightning discharges. The detection of such resonances on other planets would give a support for the exis...

2015
P. F Woolman V. K. Pearson C. S. Cockell K. Olsson-Francis

Recent discoveries have reopened the idea that, in the past, Mars had a period of wetness where conditions were similar to those on Earth [1]. If this was the case then it is feasible that these environments may have harboured life. The martian surface today is dry, cold and heavily bombarded by UV radiation, making it an environment unsuitable for any known terrestrial life [2]; the martian su...

2006
A. Vidal M. P. Golombek

Introduction Wrinkle ridges are prominent structures mapped throughout Mars where they accommodate shortening above thrust faults due to planet-scale loading of the Tharsis rise and other features. Solis Planum contains some of the most distinct and well studied arrays of wrinkle ridges on Mars and is a focus of our work. Many previous studies have conducted modeling of these wrinkle ridges in ...

2009
C. M. Dundas S. Byrne A. S. McEwen

Introduction: High latitude ground ice on Mars was inferred in the shallow subsurface by hydrogen measurements using Mars Odyssey’s Gamma Ray Spectrometer (GRS) [1]. However, at mid to low latitudes, GRS found only small quantities of hydrogen, consistent with hydrated minerals. Recent observations have shown new small craters [2], and some in the mid-latitudes have exposed water ice at a depth...

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