Three-dimensional hydrogeological modeling method and application based on TIN-GTP-TEN

In order to solve the problems in complex terrain modeling by computational fluid dynamics(CFD) simulation at prophase, such as difficulty in collecting data, tedious modeling process, wasting times and so on. In this paper, combined various commonly digital technology，and the transformation between the network terrain file and CFD (PHOENICS) solid model is realized by using a new set of outdoor complex terrain rapid digital modeling method. Take mountain city -Chongqing as an object to analyses the near-surface wind environment. The method is directly generated by the network terrain data without any screening or simplified. The virtual model can be matched the actual terrain with the extreme. By using the simulation cycle for complex terrain, time will be greatly shortened for urban planning.

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Three-Dimensional Stacked IC Design and Modeling Method

Journal of The Japan Institute of Electronics Packaging ◽

10.5104/jiep.21.447 ◽

2018 ◽

Vol 21 (5) ◽

pp. 447-451

Author(s):

Kiyohisa Hasegawa

Keyword(s):

Three Dimensional ◽

Modeling Method ◽

Ic Design

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Determination of Some Body Measurements of Camels With Three Dimensional Modeling Method (3D)

10.21203/rs.3.rs-600135/v1 ◽

2021 ◽

Author(s):

Alkan çağlı ◽

M. Yılmaz

Keyword(s):

Large Scale ◽

Three Dimensional ◽

Practical Method ◽

Modeling Method ◽

The Body ◽

Body Measurements ◽

3D Measurement ◽

Three Dimensional Modeling ◽

Dimensional Modeling ◽

The Difference

Abstract In this study, the use of three-dimensional modeling method was tested in taking some body measurements in camels with a practical method and was compared with other measurement methods. As the animal material of the study, 12 single humped dromedary female camels and 14 double humped Camelus dromedarius X Camelus bactrianus: F1 male camels, totally 26 camels, were used in three camel farms in Incirliova district of Aydın province. The body measurements taken from each animal by using different three methods, namely by Manuel Method (MM), by Photography Method (PM), and by Three Dimensional Modeling Method (3D) were the Cidago Height (CH), the Back Height (BH), the Rump Height (RH), the Body Length (BL), the Brisket Height (BRH), the Abdominal Height (AH), the Shoulder Width (SW) and the Rump Width (RW) and these values were compared with each other. As a result of this study, the mean values of MM and 3D measurement values were very close to each other and the difference between them was found to be statistically insignificant. (P<0.05). The difference between the means of PM and MM/3D measurement values was found to be significant. (P <0.05). In the measurements taken by MM, 3D, PM methods in male camels, the values obtained by MM and 3D methods for CH, BH, RH, BRH, AH, BL, and SW were very close to each other and the differences between them were found insignificant statistically (p < 0.05). On the determined regression graph, a linear was found between MM and 3D measurement values. As a result of this study, it has been determined that the 3D modeling method can be used as a remote and more practical method in determining the morphological features of large-scale animals such as camels more reliably, more easily and more practically.

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A Method for Determining the Thicknesses of the Reserved Protective Layers in Complex Goafs Using a Joint-Modeling Method of GTS and Flac3D

Advances in Civil Engineering ◽

10.1155/2021/8862339 ◽

2021 ◽

Vol 2021 ◽

pp. 1-18

Author(s):

Xin Zhao ◽

Dianshu Liu ◽

Shenglin Li ◽

Meng Wang ◽

Shuaikang Tian ◽

...

Keyword(s):

Thin Plate ◽

Plate Theory ◽

Three Dimensional ◽

Joint Modeling ◽

Modeling Method ◽

Underground Cavity ◽

Protective Layers ◽

Safe Production ◽

Thin Plate Theory ◽

The Stability

In this study, a C-ALS underground cavity scanner was used to detect the shapes of mining goafs. In addition, GTS software was adopted to establish a three-dimensional geological model based on the status of the stopes, geological data, and mechanical parameters of each rock mass and to analyze the roof areas of the goafs. In regard to the morphology of the study area, based on a thin plate theory and the obtained field sampling data, a formula was established for the thicknesses of the reserved protective layers in the goafs. In addition, a formula for the thicknesses of the protective layers in the curved gobs was obtained. The thickness formula of the protective layers was then successfully verified. The detection results showed that the roof shapes of the goafs in the Yuanjiacun Iron Mine were mainly arc-shaped, and the spans of the goafs were generally less than 20 m. The stability of the arc-shaped roofs was found to be greater than that of the plate-shaped roofs. Therefore, by reducing the thicknesses of the protective layers in mining goafs, the ore recovery rates can be increased on the basis of safe production conditions. The formula of the thickness of the security layers obtained through the thin plate theory was revised based on the statistical results of the roof shapes of the goafs and then combined using GTS and FLAC3D. The modeling method successfully verified the stability of the mined-out areas. It was found that the verification results were good, and the revised formula was able to improve the recovery rate of the ore under the conditions of meeting safe production standards. Also, it was found that the revised formula could be used in the present situation. At the same time, it was also determined that the complexity of the rock masses obstructed the full identification of the joints and fissures in the present orebodies. Therefore, it is necessary to incorporate C-ALS underground cavity scanners to regularly observe the shapes of the goafs in order to ensure that stability and safety standards are maintained.

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Research on 3D Modeling Method Based on Hybrid Octree Structure

The Open Electrical & Electronic Engineering Journal ◽

10.2174/1874129001408010323 ◽

2014 ◽

Vol 8 (1) ◽

pp. 323-329 ◽

Cited By ~ 2

Author(s):

Wang Yujian ◽

Tan Shaowei ◽

Dong Weiwei ◽

Jing Wenpeng

Keyword(s):

Data Model ◽

Three Dimensional ◽

Hash Table ◽

Structure Type ◽

Modeling Method ◽

Prefix Code ◽

Mesh Surface ◽

Three Dimensional Modeling ◽

Dimensional Modeling ◽

Hybrid Data

With studying deeply of the three-dimensional modeling method, this paper proposed a hybrid data model which based on Octree,the four fork tree and NURBS. The characteristic of fast convergence of Octree is used to segment the 3D entity. Describe the irregular surface of entity by NURBS, and restructure the local mesh surface. The model uses the mixture data structure of Octree and four fork tree to restructure mesh surface gradually. The storage structure is the Octree structure type; establish Hash table based on octal prefix code. Finally, an experimental model system is designed by using OpenGL. The feasibility and effectiveness of the algorithm has been verified.

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