Results 81 to 90 of about 6,998 (182)

The divergence characteristics of constrained-sheath optics systems for use with 5-eV atomic oxygen sources [PDF]

The potential usefulness of the constrained sheath optics concept as a means of controlling the divergence of low energy, high current density ion beams is examined numerically and experimentally.
Anderson, John R., Wilbur, Paul J.
core   +1 more source

Structural and thermal response of 30 cm diameter ion thruster optics [PDF]

Tabular and graphical data are presented which are intended for use in calibrating and validating structural and thermal models of ion thruster optics.
Gooder, S. T., Macrae, G. S., Zavesky, R. J.   +2 more
core   +1 more source

Large-Scale nighttime illuminated road extraction in the BTH region of China using SDGSAT-1 nighttime light data

International Journal of Digital Earth
Nighttime illuminated roads (NTIRs) are closely related to residents' nighttime travel and activities. However, traditional nighttime light (NTL) data are not highly applicable for large-scale NTIR extraction tasks because of challenges such as low ...
Qiyuan Xie, Hui Li, Linhai Jing, Yichen Jiang, Haifeng Ding, Zhongchang Sun   +5 more
doaj   +1 more source

TPP-SAM: A Trajectory Point Prompting Segment Anything Model for Zero-Shot Road Extraction From High-Resolution Remote Sensing Imagery

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The segment anything model (SAM) enables zero-shot or interactive segmentation of visual content and has shown remarkable performance with natural images.
Tao Wu, Yaling Hu, Jianxin Qin, Xinyi Lin, Yiliang Wan   +4 more
doaj   +1 more source

Accurate Urban Road Centerline Extraction from VHR Imagery via Multiscale Segmentation and Tensor Voting

, 2015
25 pages, 11 ...
Cheng, Guangliang, Zhu, Feiyun, Xiang, Shiming, Pan, Chunhong   +3 more
openaire   +2 more sources

Precision Inverse Modeling of Highway Pavements Based on Standardized Alignment

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Reconstruction and expansion, as well as asset management, of highways necessitate the development of a current and highly precise 3D pavement model.
Ruifeng Ma, Qing Zhu, Xuming Ge, Xin Jia, Han Hu, Tao Liu   +5 more
doaj   +1 more source

Automatic optimization of road network clustering based on PSO for road centerline extraction [PDF]

Journal of Geospatial Information Technology, 2015
Fateme Ameri, Mohammad Javad Valadan Zoej, Mehdi Mokhtarzadeh   +2 more
openaire   +1 more source

GIS Data Based Automatic High-Fidelity 3D Road Network Modeling [PDF]

3D road models are widely used in many computer applications such as racing games and driving simulations_ However, almost all high-fidelity 3D road models were generated manually by professional artists at the expense of intensive labor.
Shen, Yuzhong, Wang, Jie
core   +1 more source

Primary Electric Propulsion Technology Study [PDF]

An investigation of the 30-cm engineering-model-thruster technology with emphasis placed on the development of models for understanding and predicting the operational characteristics and wear-out mechanisms of the thruster as a function of operating or ...
Beattie, J. R., Poeschel, R. L.
core   +1 more source

Development of low cost ablative nozzles for solid propellant rocket motors, volume 1 Final report [PDF]

Evaluating low cost ablative materials for use in large solid propellant rocket ...
Laramee, R. C., Mathis, J. R.
core   +1 more source