Jiangxi University of Science and Technology

About: Jiangxi University of Science and Technology is a education organization based out in Ganzhou, China. It is known for research contribution in the topics: Microstructure & Alloy. The organization has 6958 authors who have published 5576 publications receiving 50650 citations.

Accurate facade feature extraction method for buildings from three-dimensional point cloud data considering structural information

Abstract: Facade features represent segmentations of building surfaces and can serve as a building framework. Extracting facade features from three-dimensional (3D) point cloud data (3D PCD) is an efficient method for 3D building modeling. By combining the advantages of 3D PCD and two-dimensional optical images, this study describes the creation of a highly accurate building facade feature extraction method from 3D PCD with a focus on structural information. The new extraction method involves three major steps: image feature extraction, exploration of the mapping method between the image features and 3D PCD, and optimization of the initial 3D PCD facade features considering structural information. Results show that the new method can extract the 3D PCD facade features of buildings more accurately and continuously. The new method is validated using a case study. In addition, the effectiveness of the new method is demonstrated by comparing it with the range image-extraction method and the optical image-extraction method in the absence of structural information. The 3D PCD facade features extracted by the new method can be applied in many fields, such as 3D building modeling and building information modeling.

Electrochemical Behavior of Carbonate Ion in the LiF–NaF–Li2CO3 System

Abstract: The electrochemical behavior of carbonate ion at a Ni electrode in LiF–NaF–Li2CO3 molten salt was investigated using cyclic voltammetry, square wave voltammetry, and chronopotentiometry. The results show that the electrochemical reduction of carbonate ion to carbon is a simple four-electron transfer that occurs in a one-step process. The reduction of carbonate ion at a Ni-wire working electrode is an irreversible process with diffusioncontrolled mass transfer. The diffusion coefficient of carbonate ion at 973, 993, 1023, 1043, and 1063K is 4.46 × 10−5, 4.82 × 10−5, 5.31 × 10−5, 5.90 × 10−5, and 6.54 × 10−5 cm2s−1, respectively, and the results obey the Arrhenius law, with an activation energy of 35.8kJmol−1. The X-ray diffraction results show that hexagonally structured graphitized carbon can be obtained by potentiostatic electrolysis. Scanning electron microscopy images show that the deposits exhibit a spherical morphology. © The Electrochemical Society of Japan, All rights reserved.