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There are explicit and implicit schemes in FDM . explicit scheme are easy to compute and make programmes, but it has a problem of conditional stability and the exactness is not high .

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It is convenient for this model to build error equation and distinctly process the horizontal component and height component of GPS network.

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Numerical control tools are developing quickly and used widely because they are more roboticized, less error of machined parts, products' quality are steady, easy to product exploder and easy to realize computer aid manufacture.

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During the course of using the digital image processing to research and analyze the glass-crack image, apply Microsoft Visual Basic 6.0 grogram language to develop this inspecting system and make the varied arithmetic some individual processing modules. From the open, read and storage of the image to the image segmentation, feature selection until the crack judgment, this system all utilize the modularization program method.

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The import picture feature is useful for displaying graphics from other applications in your drawing. For example, a cross-section drawing could be imported as a DXF file from AutoCAD for use as a background graphic while defining the problem domain. This feature can also be used to display things like photographs or a company logo on the drawing. Pictures are imported as an AutoCAD DXF file, a Windows bitmap file, an enhanced metafile, or a Windows metafile,.

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This article presents the reader a new method of judging if the vertical plane s of two different projecting planes are crossing and how to analyze the intersecting lines of it by using the similar shape complementary principle.

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So, it needs to research the modeling and simulation of MIMO channels. The parametrical models of MIMO fading channels are needed to analyze the effect of different array topological structures and different channel parameters on the performance of the communication system, and verify the performance of signal processing algorithm.

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