Advanced Materials Research Vols. 594-597

Abstract: The modern 2d digital topographic map can not meet the people to the 3d information needs.This paper analyzes the AutoCAD graphics file format.Use of MATLAB platform,designed the interface of the program based on the data extracted from DXF file,and extract valid data. Apply this method to extract terrain data of the contour to establish 3d geological model which has obtained a better effect. And solve the AutoCAD system and MATLAB data sharing between effectively.Use of the powerful graphics features of MATLAB, we have put forward a new way for 3d geological modeling and generation DEM.

Abstract: On the basis of a typical engineering, a foundation of soil nailing walls supporting simulation model of soil nailing on the structure of the excavation is established with FLAC, the construction process of the supporting structure is analyzed in the dynamic simulation. The deformation characteristics of the supporting structure are analyzed during the construction process, the law of the supporting body deformation with the difference of excavation steps is summarized. The situ test data of the deep foundation horizontal displacement and vertical displacement are obtained by testing in situ. Some useful conclusions are summarized by comparative analyzing the numerical simulation value and situ test data, providing guidance for the design and construction of the pit soil nailing wall.

Abstract: The islanded operation state of photovoltaic (PV) module was simulated and analyzed. PV cell was modeled according to its working principle and its running characteristics were discussed in different environment conditions. The maximum power point tracing and constant voltage regulation methods were used to adjust the output power and voltage. A PV cell module with a load was simulated and the simulation results can provide references for the development and application of renewable energy.

Abstract: Several force finding methods for the tensegrity structures, coupled with their limitations, are simply reviewed. Based on the equilibrium matrix theory and the judgment of structure’s geometrical stability, a new mathematical model, which considering the uniformity as well as the tension-compression condition of elements prestress, is proposed in this paper. The author write a corresponding MATLAB program by using the Fish-swarm Algorithm, and an example of multi states of self-stress tensegrity structrue is presented. The results show that the proposed mathematical optimization model can solve the force-finding problem of any multi states of self-stress tensegrity structure accurately and efficiently.

Abstract: In the light of the shortcomings of the traditionalIn the light of the shortcomings of the traditional methods on archiving monitoring information of dam safety, the principle of web-based 3D visualization based on Unity3D engine was explored for construction managers to grasp dam operation conditions immediately and intuitively, and the web-based 3D visualization Dam Safety Monitoring System (DSMS) was developed in B/S structure. The networked, digital and 3D visualized system was developed to provide an effective analysis platform for the construction managers to make decisions. The research is of great practical significance.

Abstract: A multi-dimension admissible support vector wavelet kernel function is introduced and the model of wavelet least square support vector machine (WLSSVM) is optimized by chaos optimization (CO), which is named as wavelet least squares support vector machine based on chaos optimization (CO-WLSSVM).The optimized model improves the forecasting precision depending multi-dimension interpolation character and sparse change character of the wavelet and quick convergence to the optimum solution of the chaos optimization. The CO-WLSSVM is applied to forecast the displacement of left side bank of slope in first-stage hydroelectric station of Jinping. The result shows that the model possesses higher precision of forecasting.

Abstract: Design works not only bring visual perception, but also are a thought-provoking process. Visual perception is a part of perception and the image generated by visual signals makes what the design works convey rich and complete. This paper can get the concepts of visual authenticity and intellectual authenticity from Art and Visual Perception written by Arnheim, elaborates the practical application of landscape design by doing research on the connotation of visual authenticity and intellectual authenticity and comparatively analyses the characteristics of visual authenticity and intellectual authenticity from three aspects ( including sensory authenticity and image authenticity, direct process and guiding process and ornamentation and interestedness ) and the correlation between visual authenticity and intellectual authenticity and landscape to make the landscape design perfect.

Abstract: The structural characteristics of the truss were introduced, and the force status of its bars was analyzed and the combination condition of loading condition for analyzing the strength of the truss was determined. This would transfer the internal complex stress state of abdominal girder withstanding the pressure into the simple compression stress state of truss rods, making it intuitive for us to know distribution and transfer of force, and then facilitating the analyzing of the structure. For example, for Pipe belt conveyor case through the establishment of the finite element model of the truss, the paper analyzed the stress, strain and displacement of its main bars while the truss being at various combination of loading condition. The results showed that: ANSYS could offer theory basis for optimization designing truss structure.

Abstract: To solve the existing fuzziness in the grading of stability evaluation of geocell protected slope and inconsistent between evaluation result by single index and the fact, this paper establishes index system of the stability evaluation of geocell protection of slope and propose a method. First, two-grade Fuzzy Matter-element Model is established based on the index system. Second, factor weights of evaluation index are calculated by AHP. Finally, the grade of the stability of geocell protection of slope is obtained based on Correlation Degree. Analysis results show that based on comprehensive consideration of subjective factors and objective factors, this method is effective and agrees well with engineering practical.

Abstract: It is established a visualization simulation mechanism of dam construction process at first. Then terrain contours are converted into grid mesh by contours discrete method to establish the terrain model. The 3D dam model, foundation pit, construction road are built. Then the dam model is digitalized to create the dam database. After that, all of the models are rendered by using 3DSMax, and then documents of models and materials are exported with a plugin of OgreMaxSceneExporter to assure that they can be identified by an effective graphics rendering engine--OGRE. Finally, a dam construction process visualization system for a practical case is developed, by which an interactive virtual reality environment is created for engineers and administrators.