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The physical model of dry type transformer was established by the professional mechanical designing program SOLIDWORKS, and the calculation of iron core and windings' temperature rises were based on heat conduction theory. The physical model that had been established in SOLIDWORKS was imported into COMSOL to conduct the simulation of temperature field analysis. In comparison with the experimental data that was given by the TBEA TIANJIN TRANSFORMERS CO., LTD, we testified the hypothesis that the fluid-solid coupling model which is considering the existence of air flow can more precisely show the distribution of the temperature field of dry-type transformer. We can gain the hotter spot of the dry-type transformer in accordance with the simulation diagram of dry-type transformers temperature distribution. Therefore, it provided a strong support for the installation site of sensor at online monitoring and optimal design of dry type transformer. [ABSTRACT FROM PUBLISHER]

Focusing on resolving the difficulty of real-time and precise detection on the distance among virtual objects in three-dimensional hoisting environment, a distance detection method in virtual three-dimensional hoisting environment is proposed in this paper. First, bounding the three-dimensional objects by using basic geometries or axis-aligned bounding boxes (AABB); Second, the three-dimensional distance algorithm based either on geometric symmetry or coordinate transformation is adopted to detect the distance in terms of the different features of the virtual objects. The results of simulation show that the algorithms proposed in this paper can successfully achieve the goal of precisely detecting the distance and effectively avoiding the collision among virtual objects, which therefore ensure the success of hoisting simulation. [ABSTRACT FROM PUBLISHER]

During Computer drafting teaching, we present an easy three-dimensional simulation platform, on which 3D modeling and animation are illustrated. A simulation on natural scene is implemented through decomposable and order steps on the platform. Falling snowflakes, as an example, are simulated to show how a natural phenomenon is realized by using simple OpenGL functions, and water and swing are designed for lively illustration as well. The platform gives us a convenient method to analyze the process of 3D simulation, and the basic principles of virtual reality involving 3D-modeling, visualization and animation are implemented. [ABSTRACT FROM PUBLISHER]

With the continuous development of computer science and technology, as a new means of audition, stereoscopic film becomes more and more popular. But the cost of traditional production method is too high. To reduce the cost, we presented a workstation to achieve the three-dimensional simulation, and output the depth of field at the same time. By using this workstation, the director can watch the stereoscopic effect and adjust the depth of field. The quality of shooting is improved significantly. The number of repeat shooting is reduced, and production cost has been controlled effectively. [ABSTRACT FROM PUBLISHER]