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Altitude, Orthocenter of a Triangle and Triangulation [PDF]
Formalized Mathematics, 2016 Summary We introduce the altitudes of a triangle (the cevians perpendicular to the opposite sides). Using the generalized Ceva’s Theorem, we prove the existence and uniqueness of the orthocenter of a triangle [7]. Finally, we formalize in Mizar [1] some formulas [2] to calculate distance using triangulation.
Roland Coghetto
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A Ground-Based Visual System for UAV Detection and Altitude Measurement Deployment and Evaluation of Ghost-YOLOv11n on Edge Devices [PDF]
SensorsThe growing threat of unauthorized drones to ground-based critical infrastructure necessitates efficient ground-to-air surveillance systems. This paper proposes a lightweight framework for UAV detection and altitude measurement from a fixed ground ...
Hongyu Wang +6 more
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Research on Type Selection of Diving Tower in 110kV Single and Double Circuit Transmission Line [PDF]
E3S Web of Conferences, 2021 With the continuous development of EHV (UHV) transmission lines，new lines often need to drill through the built lines，so it is urgent to study the type of diving towers.
Yu Xinmin +5 more
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Journal of Science: Advanced Materials and Devices, 2022 Achieving high sensitivity, resolution, and accuracy is desirable and in high demand for magnetic sensor applications. The giant magnetoimpedance (GMI) effect has drawn intensive attention owing to its ultrasensitive response to the magnetic field ...
Ho Anh Tam +8 more
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Can geographical factors determine the choices of farmers in the Ethiopian Highlands to trade in livestock markets? [PDF]
PLoS ONE, 2012 Proximity and affiliation to the local market appear to be two of the most relevant factors to explain farmer's choices to select a particular trading point. Physical barriers may limit the options , especially in developing countries.
Angel Ortiz-Pelaez +3 more
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Applied Sciences, 2023 Compared to maximum state parameters, such as maximum altitude and Mach, the number of hovers and S turns can be used as process parameters representing the complexity of military aircraft maneuvers when classifying big flight mission data to compile ...
Moli Chen +3 more
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International Journal of Aviation, Aeronautics, and Aerospace, 2021 In the first half of this paper, we present a fresh perspective toward the Wind Triangle Problem in aerial navigation by deriving necessary and sufficient conditions, which we call "go/no-go conditions", for the existence/non-existence of a solution of ...
Leonard T Huang, Lisa I Cummings
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Journal of Glaciology, 2021 The current paper studies the dynamics and age of the Triangle du Tacul (TDT) ice apron, a massive ice volume lying on a steep high-mountain rock wall in the French side of the Mont-Blanc massif at an altitude close to 3640 m a.s.l.
Grégoire Guillet +4 more
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Robust Low-Sidelobe Transmit Beamforming under Peak-to-Average-Power Ratio Constraint
Sensors, 2023 Transmit beamforming (TBF) provides the capability of focusing illuminating power in the desired directions while reducing the emitting power in undesired directions.
Lingping Cai +4 more
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The American Mathematical Monthly, 2023 A long-standing, unanswered question regarding Euclid's Elements concerns the absence of a theorem for the concurrence of the altitudes of a triangle, and the possible reasons for this omission. In the centuries following Euclid, a remarkable number of proofs have been put forward; this suggests a search for the most elementary and direct proof.
openaire +2 more sources