Digital model of polymer molecules

In this work, the authors studied and compared the two main methods used in dental practice for the automated production of orthopedic structures: the widely used CAD / CAM milling method and the 3D printing technology. As an object of research, temporary crowns were used, which were made on the basis of the same digital model: a) by the method of CAD / CAM milling from polymethylmethacrylate disks; b) by 3D printing from photopolymer resin based on LCD technology. Comparison of production methods and finished designs was carried out according to the following characteristics: strength, durability, aesthetic qualities, accuracy of orthopedic designs, etc. According to the results of the study, it was concluded that 3D printing can be a good alternative to CAD / CAM milling in solving problems of temporary prosthetics.

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The Holographic Management System Based on KKS Code and 3D Digital Model for Equipment in Smart Hydropower Stations

2020 IEEE 3rd International Conference on Automation, Electronics and Electrical Engineering (AUTEEE) ◽

10.1109/auteee50969.2020.9315669 ◽

2020 ◽

Author(s):

Yuechao Wu ◽

Liwei Liu ◽

Yuanlin Luo ◽

Bo Zheng ◽

Zhenqiu Feng ◽

...

Keyword(s):

Management System ◽

Digital Model ◽

Hydropower Stations ◽

3D Digital Model

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Advanced Power Line Diagnostics Using Point Cloud Data—Possible Applications and Limits

Remote Sensing ◽

10.3390/rs13101880 ◽

2021 ◽

Vol 13 (10) ◽

pp. 1880

Author(s):

Marek Siranec ◽

Marek Höger ◽

Alena Otcenasova

Keyword(s):

Diagnostic Techniques ◽

State Equation ◽

Power Line ◽

Climatic Conditions ◽

Digital Model ◽

Assessment Process ◽

Technical Standards ◽

Systematic Analysis ◽

Cloud Data ◽

Input Parameters

The advance in remote sensing techniques, especially the development of LiDAR scanning systems, allowed the development of new methods for power line corridor surveys using a digital model of the powerline and its surroundings. The advanced diagnostic techniques based on the acquired conductor geometry recalculation to extreme operating and climatic conditions were proposed using this digital model. Although the recalculation process is relatively easy and straightforward, the uncertainties of input parameters used for the recalculation can significantly compromise such recalculation accuracy. This paper presents a systematic analysis of the accuracy of the recalculation affected by the inaccuracies of the conductor state equation input variables. The sensitivity of the recalculation to the inaccuracy of five basic input parameters was tested (initial temperature and mechanical tension, elasticity modulus, specific gravity load and tower span) by comparing the conductor sag values when input parameters were affected by a specific inaccuracy with an ideal sag-tension table. The presented tests clearly showed that the sag recalculation inaccuracy must be taken into account during the safety assessment process, as the sag deviation can, in some cases, reach values comparable to the minimal clearance distances specified in the technical standards.

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