搜索结果: 1-15 共查到“航空、航天科学技术 A study”相关记录23条 . 查询时间(0.53 秒)
MIT study compares the four largest internet meganetworks（图）
互联网 巨型网络 卫星
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2023/6/19
In recent months, people have reported seeing a parade of star-like points passing across the night sky. The formation is not extraterrestrial, or even astrophysical in origin, but is in fact a line o...
AN IMPROVED DEM CONSTRUCTION METHOD FOR MUDFLATS BASED ON BJ-1 SMALL SATELLITE IMAGES: A CASE STUDY ON BOHAI BAY
Mudflats BJ-1 image Waterline detection method Tidal grid model DEM
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2018/5/15
The topographic measurement of muddy tidal flat is restricted by the difficulty of access to the complex, wide-range and dynamic tidal conditions. Then the waterline detection method (WDM) has the pot...
STUDY ON MOSAIC AND UNIFORM COLOR METHOD OF SATELLITE IMAGE FUSION IN LARGE SREA
Large area Multi-temporal Satellite image mosaic Automatic uniform color
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2018/5/15
Due to the improvement of satellite radiometric resolution and the color difference for multi-temporal satellite remote sensing images and the large amount of satellite image data, how to complete the...
LAND USE/LAND COVER CHANGE DETECTION USING MULTI–TEMPORAL SATELLITE DATASET: A CASE STUDY IN ISTANBUL NEW AIRPORT
Multi-temporal satellite dataset Land Use/Land Cover Landsat-8 Sentinel 2A Change detection
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2018/5/8
In recent years, especially in metropolitan cities such as Istanbul, the emerging needs of the increasing population and demand for better air transportation capacity have led to big environmental cha...
CHALLENGES AND OPPORTUNITIES FOR THE IMPLEMENTATION OF H-BIM WITH REGARDS TO HISTORICAL INFRASTRUCTURES: A CASE STUDY OF THE PONTE GIORGINI IN CASTIGLIONE DELLA PESCAIA (GROSSETO – ITALY)
H-BIM Cultural Heritage (SfM) Structure from Motion (TLS) Terrestrial Laser Scanner (UAV) Unmanned Aerial Vehicle monitoring interoperability
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2017/6/20
Historical Building Information Modeling (H-BIM) has been widely documented in literature and is becoming more popular with government bodies, who are increasingly choosing to make its use mandatory i...
ACCURACY STUDY OF DIGITAL RESTITUTION PRODUCED FROM SCANNED 1/40000 SCALE AERIAL PHOTOGRAPHS AT DIFFERENT RESOLUTIONS
Scanning multi-resolution restitution mapping scale accuracy
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2015/7/29
La photogrammétrie a connu une évolution croissante passant par les procédés analogique, semi- analytique et analytique qui
étaient bien développés durant la deuxième moitié du siècle précédent. Ver...
A STUDY ON PRODUCTIVITY OF SATELLITE IMAGES IN THE PLANNING PHASE OF LAND CONSOLIDATION PROJECTS
Land Agriculture Planning Satellite Image
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2015/7/29
Engineers in geomatics are now using high tech technologies which are based on satellite systems. GPS and remote sensing technologies
offer great advantages for surveyors. One of the areas where the...
A Systematic Study on the Impact of Dimensionality for a Two-Dimensional Aerodynamic Optimization Model Problem
Systematic Study Impact Dimensionality Two-Dimensional Aerodynamic Optimization Model Problem
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2015/7/3
A model problem, based on the NACA0012 airfoil, is studied. The thickness distribution of the symmetric NACA0012 airfoil is optimally approximated with a 4th-order Bezier curve. This best-fit ap...
Comparative Study of 3D Wing Drag Minimization by Different Optimization Techniques
3D Wing Drag Minimization Diff erent Optimization Techniques
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2015/7/2
The main goal of this paper is to document a comparative study of different CFD based optimization techniques applied to the so lution of a 3D wing drag minimization problem.
Aerodynamics and Flight Control of Flapping Wing Flight Vehicles: A Preliminary Computational Study
Aerodynamics Flight Control Flapping Wing Flight Vehicles Preliminary Computational Study
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2015/7/2
The dexterity and gracefulness of winged creatures have captured the imagination of humans for a long time. Insects have evolved sophisticated ight control mechanisms that permit a remarkable range of...
A Gradient Accuracy Study for the Adjoin&Based Navier-Stokes Design Method
Gradient Accuracy Study Adjoin&Based Navier-Stokes Design Method
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2015/7/2
A continuous adjoint method for Aerodynamic Shape Optimization (ASO) using the compressible Reynolds-Averaged Navier-Stokes (RANS) equa-tions and the Baldwin-Lomax turbulence model was implemented and...
A Parametric Sensitivity Study of Ultra Closely Spaced Parallel Approaches
Parametric Sensitivity Study Closely Spaced Parallel Approaches
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2015/6/29
Commercial air traffic is projected to grow approxi mately 5% per year over the coming decades. This means that the world’s airports and airspace will need to handle an increase of traffic by a factor...
LAAS Study of Slow-Moving Ionosphere Anomalies and Their Potential Impacts
Ionosphere Anomalies Potential Impacts
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2015/6/26
Triggered by several severe ionosphere storms that have occurred in recent years, research has been done to studying those anomalies, the physics behind them, and their potential impact on augmented G...
Assessing the Security of a Navigation System:A Case Study using Enhanced Loran
Assessing Security Navigation System Enhanced Loran
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2015/6/25
Global Navigation Satellite Systems (GNSS) has become increasingly interwoven into the fabric of our infrastructure and economic system. However, as GNSS becomes more important for safety of life and ...
Efficient authentication mechanisms for navigation systems–a radio-navigation case study
authentication mechanisms navigation systems radio-navigation
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2015/6/25
In this paper we introduce an efficient authentication mechanism especially designed for navigation systems that is based upon the Timed Efficient Stream Loss-Tolerant Authentication (TESLA) algorithm...