NET MVC is a program framework for developing large web applications. It divides the development of program into three parts to design, greatly enhances the reusability, expansibility and maintainability of web applications. Based on the above features of .NET MVC and the ideas of software engineering, we design the system framework, technology route and main function modules of the internet service platform for rural house building technique criteria and management. At last, based on C# and LINQ, this paper completed a part of codes of the system.

This document puts forward a new method for solving the modeling of overground and underground entities and spatial analysis provided by the virtual reality technology (VR). The new method can construct virtual urban geological environment, realize the integrated modeling of overground and underground entities, and research the interactive functions such as 2D-digital map navigation and spatial query in the virtual environment, which provides the decision making platform of three-dimension visualization for urban planning, urban construction and urban management, and is a good foundation for construction of “the management and service systems for urban geological information”.

In order to resolve the problems about providing optimal learning and training and high price caused by frequent computer-assembly, a virtual computer assembly experimental system is built by virtual reality technology. The architecture of virtual computer assembly system is put forward and the prototype for the virtual computer assembly system is built based on virtual reality. Key technologies such as the scene control and rendering of Vega Prime, collision detection in assembling, computer hardware model real-time editing and model positioning are discussed in detail, and the virtual assembly system is applied to practice which is testified feasibly.

The variation of the temperature, stress and deformation of the high strength steel was simulated by using MSC.MARC software. The effect of martensitic transformation on the temperature, stress and deformation filed was discussed. The results shown that, the equivalent stress of the plate along length direction is distributed uneven when considered the phase transition. The maximum deformation and the deformation along length direction of the plate are increased obviously when considered the martensitic transformation.

By the optimization of piping models, this paper comes up with some 3-dimensional modeling methods on the basis of OpenFlight API, and solves the critical issues of modeling. In addition, it also establishes a quick modeling means of 3-dimensional underground piping, which is directly formed by databases, drawings, and DXF files, thus realizing the quick modeling of macroscopic underground piping.