scholarly journals High-precision 3D real scene model construction method based on air-ground data combination

2020 ◽  
Vol 570 ◽  
pp. 042022
Author(s):  
Fei Yang ◽  
Chengrong Ma ◽  
Bowen Zhang ◽  
Xuannan Chen ◽  
Li Cao ◽  
...  
Keyword(s):  
High Precision ◽  
Construction Method ◽  
Model Construction ◽  
Data Combination ◽  
Real Scene

scholarly journals Research on Automatic Construction Method of Three-Dimensional Complex Fault Model

Minerals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 893
Author(s):  
Chi Zhang ◽  
Xiaolin Hou ◽  
Mao Pan ◽  
Zhaoliang Li
Keyword(s):  
Three Dimensional ◽  
Geological Structure ◽  
Fault Model ◽  
Construction Method ◽  
Model Construction ◽  
Automatic Construction ◽  
Complex Fault ◽  
Resource Exploration ◽  
Fault Structures ◽  
Manual Interaction

Three-dimensional complex fault modeling is an important research topic in three-dimensional geological structure modeling. The automatic construction of complex fault models has research significance and application value for basic geological theories, as well as engineering fields such as geological engineering, resource exploration, and digital mines. Complex fault structures, especially complex fault networks with multilevel branches, still require a large amount of manual participation in the characterization of fault transfer relationships. This paper proposes an automatic construction method for a three-dimensional complex fault model, including the generation and optimization of fault surfaces, automatic determination of the contact relationship between fault surfaces, and recording of the model. This method realizes the automatic construction of a three-dimensional complex fault model, reduces the manual interaction in model construction, improves the automation of fault model construction, and saves manual modeling time.

Switching Fuzzy Model Construction and Controller Design for Dynamical Systems with Input Nonlinearity

2008 ◽  
Vol 12 (6) ◽  
pp. 537-545 ◽  
Author(s):  
Hiroshi Ohtake ◽  
◽  
Kazuo Tanaka
Keyword(s):  
Dynamical Systems ◽  
State Feedback ◽  
Controller Design ◽  
Fuzzy Model ◽  
Construction Method ◽  
Model Construction ◽  
Dynamic State ◽  
Membership Functions ◽  
Input Nonlinearity ◽  
Control Approach

Fuzzy model-based control mainly deals with dynamical systems which affinely depend on control inputs. In this paper, dynamical systems which is permitted to have nonlinearity not only in the states, but also in the inputs is considered. Input nonlinearity makes a nonlinear system complicated and makes the number of fuzzy model rules increase. Thus, switching fuzzy control approach is employed. Firstly, the switching fuzzy model construction with arbitrary linear dividing planes, which is an extension of the ordinary switching fuzzy model construction method with dividing planes corresponding to quadrants, is introduced. Secondly, by applying the switching fuzzy model construction method to the dynamical system with input nonlinearity, the switching fuzzy model with membership functions which depend on control inputs is constructed. Finally, by utilizing the dynamic state feedback control approach, we show that membership functions which depend on control inputs can be calculated. Moreover, by employing augmented system approach, the switching fuzzy dynamic state feedback controller design conditions based on the switching Lyapunov function are derived in terms of linear matrix inequalities. A design example illustrates the utility of this approach.

An Efficient SCA Leakage Model Construction Method Under Predictable Evaluation

2018 ◽  
Vol 13 (12) ◽  
pp. 3008-3018 ◽  
Author(s):  
Tang Ming ◽  
Wang Pengbo ◽  
Ma Xiaoqi ◽  
Chang Wenjie ◽  
Zhang Huanguo ◽  
...  
Keyword(s):  
Construction Method ◽  
Model Construction ◽  
Leakage Model

scholarly journals Criterial models of the stem separation process when harvesting rice

2019 ◽  
Vol 126 ◽  
pp. 00009
Author(s):  
V.N. Primak ◽  
Yu.A. Tsarev ◽  
A.Yu. Popov
Keyword(s):  
Mechanical Properties ◽  
Environmental Factors ◽  
Classical Theory ◽  
Physical And Mechanical Properties ◽  
Construction Method ◽  
Separation Process ◽  
Model Construction ◽  
Statistical Studies ◽  
Grain Losses

The problem of determining the influence of several major environmental factors on the value of grain losses during rice stem separation by a vibratory grain divider is considered. It makes it possible to establish the grain loss dependences upon varying the divider's parameters obtained for polynomial and criterial models, as well as enables to confirm the advantage and feasibility of using a vibratory grain divider on windrowers for rice harvesting. The criterion equations of the stem separation process by a vibratory grain divider are developed and the dependences of the change in the loss values behind the divider when cutting upright and lodged rice are obtained. They confirm the results of statistical studies, but to a greater extent illustrate information about the stem separation process. For this research, a classical theory of similarity and modeling was used, which made it possible to develop a model construction method taking into account physical and mechanical properties of plants when they are cut with windrowers on upright and lodged agricultural backgrounds with losses in the divider zone and under the windrow in the harvest field.

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