Results 71 to 80 of about 1,089,333 (288)

Hyperhemispheric Lens Geometric Calibration

, 2022
In this report we will show the calibration procedure and the obtained results for the definition of the intrinsic parameters of a wide-angle lens through the use of a set of acquisitions of a well-known calibration target. In this case the method is applied to INAF payload panoramic hereafter called BPL (Bifocal Panoramic Lens)
CORAN, GIACOMO, SIMIONI, EMANUELE, PERNECHELE, Claudio, LESSIO, Luigi   +3 more
openaire   +1 more source

Inverse Identification of Energy‐Dependent Laser Absorptivity in NiTi Laser Powder‐Bed Fusion via Calibrated Melt Pool Simulation

Advanced Engineering Materials, EarlyView.
A combined experimental–computational framework identifies energy‐dependent laser absorptivity for NiTi in laser powder‐bed fusion, applicable to conduction and transition modes. Single‐track experiments and thermofluid smoothed particle hydrodynamics simulations are coupled through inverse analysis of melt pool geometry.
Mohamadreza Afrasiabi, Hadi Moutablaleh, Ignatius A. Setiawan, Mehrshad Mehrpouya   +3 more
wiley   +1 more source

Fisheye Lens Geometric Calibration

, 2022
In this report we will show the calibration procedure and the obtained results for the definition of the intrinsic parameters of a wide-angle system through the use of a set of acquisitions of a well-known calibration target. In this case the method is applied to a Fujinon fish-eye camera hereafter called FEL (Fish-Eye Lens).
CORAN, GIACOMO, SIMIONI, EMANUELE, PERNECHELE, Claudio, LESSIO, Luigi   +3 more
openaire   +2 more sources

Influence of Scan Strategies in Electron Beam Powder Bed Fusion on Solidification, Microstructure, and High‐Temperature Compressive Properties of γ′‐Strengthened Inconel 738LC

Advanced Engineering Materials, EarlyView.
Experiments and thermophysical simulations were conducted to investigate the electron beam powder bed fusion electron beam (PBF‐EB/M) process for the γ′‐strengthened nickel‐based superalloy Inconel 738LC. The results demonstrate the impact of process‐induced microstructural variations on high‐temperature mechanical behavior, providing a basis for ...
Jan Niklas Petenati, Karthik Kumar Banku, Prasanth Bondi, Ivan Zhirnov, Yangyiwei Yang, Gordon Schmidt, Jürgen Christen, Georg Hasemann, Manja Krüger, Bai‐Xiang Xu, Bilal Gökce, Silja‐Katharina Rittinghaus   +11 more
wiley   +1 more source

On-Orbit Geometric Calibration and Accuracy Validation of the Jilin1-KF01B Wide-Field Camera

Remote Sensing
On-orbit geometric calibration is key to improving the geometric positioning accuracy of high-resolution optical remote sensing satellite data. Grouped calibration with geometric consistency (GCGC) is proposed in this paper for the Jilin1-KF01B satellite,
Hongyu Wu, Guanzhou Chen, Yang Bai, Ying Peng, Qianqian Ba, Shuai Huang, Xing Zhong, Haijiang Sun, Lei Zhang, Fuyu Feng   +9 more
doaj   +1 more source

Sky camera geometric calibration using solar observations [PDF]

Atmospheric Measurement Techniques, 2016
A camera model and associated automated calibration procedure for stationary daytime sky imaging cameras is presented. The specific modeling and calibration needs are motivated by remotely deployed cameras used to forecast solar power production where ...
B. Urquhart, B. Kurtz, J. Kleissl
doaj   +1 more source

Distinct Microstructural Characteristic Lengths Defining Notch Fatigue Crack Initiation and Propagation, and Defect Tolerance in Advanced Steels

Advanced Engineering Materials, EarlyView.
Schematic representation of modes of microcrack nucleation, growth and temporary arrestment at different boundaries, with the criteria for crack propagation in three scenarios: (1) large notch, (2) defect/small sharp notch, and (3) long crack. This work revisits and integrates results on the fatigue behavior of advanced bainitic steels (in particular ...
Lucia Morales‐Rivas
wiley   +1 more source

Geometric Calibration for the Linear Array Camera Based on Star Observation

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
This article presents an innovative geometric calibration mode for a linear array camera used in the Jilin-1 satellite. Changing the camera from observing the ground to observing space and treating stars as control points allow for the accurate ...
Zhichao Guan, Yonghua Jiang, Guo Zhang, Xing Zhong   +3 more
doaj   +1 more source

Microstructure Modification of Additively Manufactured Mo–9Si–8B by Annealing and Its Effects on High‐Temperature Mechanical Properties

Advanced Engineering Materials, EarlyView.
Postbuild annealing systematically modifies the phase fractions and morphology of EB‐PBF processed Mo–9Si–8B. Quantitative microstructure–property correlations reveal how controlled phase evolution enhances high‐temperature compressive strength and creep resistance.
Christopher Schmidt, Yong Chen, Georg Hasemann, Benjamin Wahlmann, Carolin Körner, Manja Krüger   +5 more
wiley   +1 more source

On the reduction in the problem of in-flight geometric calibration [PDF]

, 2017
Розглядаються особливості реалізації двох алгоритмів польотного геометричного калібрування.Realization peculiarities of two algorithms of in-flight geometric calibration are ...
Ткаченко, А.И.
core   +1 more source