Results 41 to 50 of about 133,554 (298)

Optimized Landing Site Selection at the Lunar South Pole: A Convolutional Neural Network Approach

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The identification of optimal landing sites is a critical first step for successful missions to the Moon and other extraterrestrial bodies, necessitating the integration of various environmental factors over large spatial scales. At the lunar south pole,
Yongjiu Feng, Haoteng Li, Xiaohua Tong, Pengshuo Li, Rong Wang, Shurui Chen, Mengrong Xi, Jingbo Sun, Yuhao Wang, Huaiyu He, Chao Wang, Xiong Xu, Huan Xie, Yanmin Jin, Sicong Liu   +14 more
doaj   +1 more source

The domination of Saturn's low latitude ionosphere by ring `rain' [PDF]

, 2013
Saturn's ionosphere is produced when the otherwise neutral atmosphere is exposed to a flow of energetic charged particles or solar radiation. At low latitudes the latter should result in a weak planet-wide glow in infrared (IR), corresponding to the ...
Baines, K. H., Blake, J. S. D., Cowley, S. W. H., Jones, G. H., Melin, H., Miller, S., O'Donoghue, J., Stallard, T. S.   +7 more
core   +2 more sources

Influence of Sample Preparation and Processing Procedures on the Thermal Diffusivity of MgO‐C Refractories

Advanced Engineering Materials, EarlyView.
The thermal diffusivity of MgO‐C refractories is highly sensitive to sample preparation and processing procedures. In this article, the effects of coking sequence, machining conditions, structural inhomogeneity, and graphite coating application on measurements using laser flash apparatus are systematically investigated.
Luyao Pan, Rhena Wulf, Till M. J. Stadtmüller, Christos G. Aneziris, Tobias M. Fieback   +4 more
wiley   +1 more source

Mid-low latitude LOLA terrain maps of the Chang’e-6 sampling area through batch self-constrained adjustment and fusion with the SLDEM

Geo-spatial Information Science
The Lunar Orbiter Laser Altimeter (LOLA) is currently the most precise spaceborne laser altimeter in lunar exploration. The digital elevation model (DEM) generated from the laser points obtained by LOLA is also the highest-precision global lunar terrain ...
Huan Xie, Ruilin Yang, Binru Yang, Xiaoshuai Liu, Yuanting Xi, Zhen Ye, Rong Huang, Yusheng Xu, Shijie Liu, Xiongfeng Yan, Xiaohua Tong   +10 more
doaj   +1 more source

Quality assessment of ICESat-2 ATL03 denoising data based on spatial distribution and photon weight [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
The Ice, Cloud, and land Elevation satellite-2 (ICESat-2) adopts an advanced single photon detection system, which is susceptible to the influence of solar background noise. There are currently multiple methods for denoising ICESat-2 photon data, but due
Y. Sun, Y. Sun, Y. Sun, H. Xie, X. Tong, Q. Xu, B. Li, C. Liu, M. Ji, H. Tang, H. Tang   +10 more
doaj   +1 more source

Herschel spectral-mapping of the Helix Nebula (NGC 7293): Extended CO photodissociation and OH+ emission [PDF]

, 2014
The Helix Nebula (NGC 7293) is the closest planetary nebulae. Therefore, it is an ideal template for photochemical studies at small spatial scales in planetary nebulae. We aim to study the spatial distribution of the atomic and the molecular gas, and the
Barlow, M. J., Cernicharo, J., Etxaluze, M., Goicoechea, J. R., Groenewegen, M. A. T., Kerschbaum, F., Lim, T. L., Lique, F., Matsuura, M., Pearson, C., Polehampton, E. T., Royer, P., Swinyard, B. M., Ueta, T., van de Steene, G. C., van Hoof, P. A. M.   +15 more
core   +3 more sources

Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley   +1 more source

Shape reconstruction and rotation axis estimation of small bodies using a voxel-divided shape-from-silhouette method

Geo-spatial Information Science
In the space between long-distance photometric observations and close-range visual feature observations, images that present only silhouette information of small bodies are valuable for estimating the physical characteristics and establishing a body ...
Yifan Wang, Xiongfeng Yan, Huan Xie, Ming Yang, Zhen Ye, Yaqiong Wang, Hao Chen, Jie Chen, Taoze Ying, Xiaohua Tong   +9 more
doaj   +1 more source

Vladimir Aleksandrovich Kotelnikov: Pioneer of the sampling theorem, cryptography, optimal detection, planetary mapping [PDF]

, 2009
In 1933 the young Russian communications engineer Vladimir Aleksandrovich Kotelnikov published a paper in which he formulated for the first time in an engineering context the sampling theorem for lowpass and bandpass signals.
Bissell, Christopher
core   +1 more source

On‐Demand Activation of Thin Alginate Shell Encapsulated Volatile Liquid for Untethered Pneumatic Soft Actuation

Advanced Engineering Materials, EarlyView.
Phase‐changing liquids enable untethered pneumatic actuation in soft robotics but suffer from volatility and storage challenges. This work reports a simple method to encapsulate Novec 7000 within micron‐thin alginate shells via in situ injection and ionic crosslinking.
Rayan A. M. Basodan, Jack Keddie, Byoungyoul Park, Hyun‐Joong Chung   +3 more
wiley   +1 more source