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In terms of the retail commodity sale forecast, people did more in particular aspect with commodity's single sale attribute such as the sale volume, the sale money, the season factor, but all has not considered the most important factor-profit, the profit is the key factor of retail enterprises winning the survival and development. However, such a one-sided analysis is not conducive to assist the...
A cloud platform prototype for Computer Aided Engineering (CAE) simulation is developed for the large-scale parallel CAE simulation application. We propose the architecture of the platform. In the architecture, we propose a technology called CAE Application Packaging Template (CAE-APT) for integrating heterogeneous CAE softwares based on "Tianhe No.1". We discuss the design ideas and the...
In recent years, there have been more and more research and applications on three-dimensional model reconstruction. With the help of Kinect, a somatosensory device invented by Microsoft, we realized three-dimensional model reconstruction process. Firstly, this paper introduced the acquisition mechanism of color and depth images. Because the color camera and the depth camera are not coincident, precise...
Boundary Layer Ingestion (BLI) effects are the new and special issues caused by the in-depth integration of airframe and propulsion system. Based on a mathematical model of the distributed propulsion system and a sliced CFD model of SAX-40, this paper presents a detailed numerical research on the BLI effects of distributed propulsion configuration. The influence regularities of BLI on aerodynamic...
PZ-30 excavator is a small tonnage miniature excavator. Due to the need of working condition, this machine should be long-term mount hydraulic breaking hammer. In order to reduce the damage on excavator boom caused by vibration and optimize the design of boom, it is needed to conduct modal analysis of boom. This paper uses the Algor finite element simulation software, combined with the actual working...
In order to accurately construct the modeling of a telerobot in a virtual environment and reduce the work of developing the graphic design, this paper took the XK-II telerobot as a prototype, using SolidWorks modeling and interactive graphics programming with Open Inventor. First of all, we constructed each entities' geometric model in SolidWorks, and then, derived these models into VRML files and...
In order to solve the problem of generating and optimizing the assembly sequences of a complex assembly, the oriented-mating graph model of the assembly and the related mating matrix are created. Then an improved ant colony optimization is used to solve the ASP problem. In the algorithm, the local and global pheromones are updated to help the ant colony find the global optimizations more quickly....
A semi-automatic method was developed for the segmentation of 3D gallbladders (GB) from CT images, in order to construct a patient-specific model for a surgical training system. First a support vector machine (SVM) classifier was trained to extract GB region from one single 2D slice in the intermediate part of a GB by voxel classification. Then the extracted GB contour, after some morphological operations,...
This paper presents a new mesh simplification algorithm based on edge collapse, it combines surface curvature and quadric error metric, the position of a new vertex for edge collapse depends on multiple-weighted approach. The new algorithm can improve simplification rationality in procedure and preserve important features after simplification. In an addition, we do some experiments with comparing...
In this paper, a new method for real-time rendering of three-dimensional terrain is proposed. The method combines together several methods such as block data, view-dependent multi-resolution LOD, view frustum culling etc. It exploits a new method to measure the terrain curvature. The new method uses multiple-approach to simplify terrain model and reduce the cost of memory, which can improve efficient...
A method that flatten surface of 3D model is presented. It can flatten the surface of model into a 2D shape as well as automatically cut and partition. The method avoids global and local self-intersections and minimizes the total length of the introduced seams. Then, a 3D models retrieval methodology based on the shape comparison is proposed. By using areas of the triangles, the convexity of each...
A method that flatten surface of 3D model is presented. It can flatten the surface of model into a 2D shape as well as automatically cut and partition. The method avoids global and local self-intersections and minimizes the total length of the introduced seams. Then, a 3D models retrieval methodology based on the shape comparison is proposed. By using the flattened surface, pole mapped version normalization...
Hybrid control system is heterogeneous and difficult to design and modeling. This paper presents a component-oriented design methodology that reduces complexity by separating computational parts from interaction among components. We introduce a concept of supervisor to discuss how to aggregate individual component's computation into a coarse-grained composite component from a view of interaction semantics...
With the development of computer and Internet technology, virtual reality based on Web becomes more and more fashionable. What is more, it also shows to be an increasingly effective way in teaching, learning and solving problems in education. This paper does the research on the application of virtual reality in Web-based education. Namely, we give a totally analysis on the techniques of VR and SVR...
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