Results 21 to 30 of about 1,624 (211)
Theoretical model of solar incident angle for an optionally oriented fixed flat surface [PDF]
Tehnika, 2022 The apparent position of the Sun in relation to any surface is defined by the solar incident angle. The solar incident angle forms the vector of the position of the Sun and the vector of normal to the observed surface.
Nešović Aleksandar M.
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Experimental simulation of fracture initiation and morphology in tight sandstone gas reservoirs temporary plugging fracturing [PDF]
Youqicang pingjia yu kaifaThis study addresses the challenges presented by the reservoirs in He-8 member in SD block of Ordos Basin, characterized by low porosity, low permeability, strong heterogeneity, and conventional fracturing fracture shapes.
KONG Xiangwei,XU Hongxing,SHI Xian,CHEN Hang
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Journal of Marine Science and EngineeringAs critical assets for polar development and global strategy, nuclear-powered icebreakers necessitate rigorous safety research under extreme meteorological conditions.
Linlin Yin +4 more
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Ultra-small-angle neutron scattering with azimuthal asymmetry [PDF]
Journal of Applied Crystallography, 2016 Small-angle neutron scattering (SANS) measurements from thin sections of rock samples such as shales demand as great a scattering vector range as possible because the pores cover a wide range of sizes. The limitation of the scattering vector range for pinhole SANS requires slit-smeared ultra-SANS (USANS) measurements that need to be converted to ...
Gu, X., Mildner, D. F. R.
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A Non-Uniform-Angular-Rate Beam-Scan Method for Airborne TOPS Mode [PDF]
Radioengineering, 2018 TOPS (Terrain Observation by Progressive Scans) mode can achieve large scene coverage through the beam-scan in a uniform-angular-rate form, when the scanning angle is large, the variation of azimuth theoretical resolution with the scanning angle cannot ...
Y. F. Guan, W. G. Chang
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International Surgery Journal, 2021 As per baseball diamond concept of port position, experimentally it is well known that putting camera port in the line of target organ and working port equidistant from camera port such that they form a 30º angle each gives optimum ergonomic advantage. However while performing laparoscopic surgeries in humans it is seldom possible to achieve such port ...
Gaurav Joshi +5 more
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Leida xuebao, 2018 Traditional spaceborne Synthetic Aperture Radar (SAR) can acquire three-dimensional (3D) images by using multi-baseline SAR data, which solves the problem of layover in two-dimensional (2D) SAR image, however, there is still a problem of insufficient ...
Kuang Hui +3 more
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An Omni-Azimuth Angle Sensor for Tilt Measuring Based on FBG Array
IEEE Photonics Journal, 2021 An omni-azimuth angle sensor for tilt measuring based on fiber Bragg grating (FBG) array is proposed. It is designed based on the sensitivity of FBG to axial traction. The sensor consists of a mass block and a cube frame connected by an FBG array.
Guangwei Fu +5 more
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Advanced Engineering Materials, EarlyView.In situ synchrotron high‐energy X‐ray diffraction reveals the real‐time high‐temperature phase evolution of a ternary V‐9Si‐6.5B alloy. The study uncovers a kinetically delayed V5SiB2 → V8SiB4 transformation governed by massive structural and chemical barriers.
Zahra Sabeti +4 more
wiley +1 more source
Chiral Phase Change Nanomaterials
Advanced Functional Materials, EarlyView.This work demonstrates reversible, non‐volatile phase transitions in chiral Ge2${\rm Ge}_2$Sb2${\rm Sb}_2$Te5${\rm Te}_5$ (GST) nanohelices for high‐speed optical modulation of chirality and dynamic control of the state of polarization (SOP). The chiral nanostructures are fabricated using a highly directional, wafer‐scale physical vapor deposition ...
Joshua A. Burrow +11 more
wiley +1 more source