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A survey of visual analytics techniques for online education

open access: yesVisual Informatics, 2022
Visual analytics techniques are widely utilized to facilitate the exploration of online educational data. To help researchers better understand the necessity and the efficiency of these techniques in online education, we systematically review related ...
Xiaoyan Kui   +5 more
doaj   +1 more source

3D CHANGE DETECTION OF POINT CLOUDS BASED ON DENSITY ADAPTIVE LOCAL EUCLIDEAN DISTANCE [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022
With the development of sensors and multi-view stereo matching technology, image-based dense matching point cloud data shares higher geometric accuracy and richer spectral information, and such data is therefore widely used in change detection-related ...
J. X. Chai, Y. S. Zhang, Z. Yang, J. Wu
doaj   +1 more source

Selective Extraction of Ni from Superalloy Scraps by Molten Mg-Zn

open access: yesMetals, 2021
Bearing significant concentrations of high value and critical metals, superalloy scraps require comprehensive recycling for metal reclamation. In this study, nickel-based superalloy was treated with molten Mg-Zn for the selective extraction of nickel ...
Qinghua Tian   +4 more
doaj   +1 more source

Location for single‐phase grounding fault in distribution network based on equivalent admittance distortion rate

open access: yesIET Generation, Transmission & Distribution, 2021
To solve the problem of difficult location (especially high grounding resistances) for single‐phase grounding faults in distribution networks, a fault location method based on equivalent admittance distortion rate is proposed in this paper.
Yougen Chen   +3 more
doaj   +1 more source

HIGH-RESOLUTION SATELLITE IMAGE TRIFOCAL TENSOR SOLUTION [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2023
This study presents an efficient algorithm for solving the affine trifocal tensor problem in  high-resolution satellite imagery. Because the imaging mode of high-resolution satellites is usually a line-center projection and the field of view is ...
S. Yang, H. Pan, T. Huang
doaj   +1 more source

Physico-chemical profile and corrosion mechanism of the failure grate bar from iron ore sintering process

open access: yesJournal of Materials Research and Technology, 2022
The grate bars are a critical and easily consumable component of the sintering machine, and the control of their corrosion is of great importance to reduce their consumption.
Xiaohui Fan   +9 more
doaj   +1 more source

Ab Initio Molecular Dynamics Simulation of Microstructure and Transport Properties of K3AlF6-2.2NaF-AlF3 System

open access: yesMetals, 2023
Researching the aluminum molten salt system has always been challenging because of the high temperature and significant corrosion seen in the aluminum electrolysis industry.
Jingkun Wang   +3 more
doaj   +1 more source

Mineralization behavior and strengthening technology of high calcium MSWI fly ash in sintering co-treatment process

open access: yesJournal of Materials Research and Technology, 2022
Co-processing of municipal solid waste incineration fly ash (MSWI-FA) during iron ore sintering is a potentially feasible path for harmless and resourceful utilization.
Xiaohui Fan   +7 more
doaj   +1 more source

An Integration Optimization Strategy of Line Voltage Cascaded Quasi-Z-Source Inverter Parameters Based on GRA-FA

open access: yesEnergies, 2020
Setting reasonable circuit parameters is an important way to improve the quality of inverters, including waveform quality and power loss. In this paper, a circuit system of line voltage cascaded quasi-Z-source inverter (LVC-qZSI) is built. On this basis,
Zhiyong Li   +3 more
doaj   +1 more source

Silica extraction from bauxite reaction residue and synthesis water glass

open access: yesGreen Processing and Synthesis, 2021
Bauxite reaction residue (BRR) produced from the poly-aluminum chloride (PAC) coagulant industry is a solid acidic waste that is harmful to environment. A low temperature synthesis route to convert the waste into water glass was reported.
Zhao Yunlong   +4 more
doaj   +1 more source

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