MGM is introduced to solve field distributions in 3-D electron optical systems. The difference equation, the discrete form of Laplace's equation, is deduced in 3-D Cartesian coordinates. In view of the smooth effect, MGM combines Gauss-Seidel iteration with a technique known as coarse grid correction. Formulae for restriction and prolongation are deduced and expressed in terms of tensors.

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In view of this fact a Protestant historian, Molmier, in writing of the Friars Preachers, remarks:"They were not content with professing in their convents all the divisions of science, as it was then understood; they added an entire order of studies which no other Christian schools of the time seem to have taught, and in which they had no other rivals than the rabbis of Languedoc and Spain""Guillem Bernard de Gaillac et l'enseignement chez les Dominicains", Paris, 1884, p.

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In view of the commonly existing situation, in which the investment is out of control in construction cost in China and technology is separated from economy in the construction circle at home, this article elaborates the significance in studying this subject.

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In view of the characters of multi-source and multi-stove,hydrocarbon production in multi-stage and deposit in different periods in Wu Maying oil field ,and using the concept of compound including oil-gas system,we deeply investigated the characteristics of folded growth,oil-gas distribution and oil deposit of No.

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In view of its enormous effect in vocal music, this article analyses and researches the effect of imagination in the study of vocal music and in the process of singing, in three chapters from the perspective of psychology.

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Based on analyzing the algorithms of Delaunay triangulation creation in domestic and abroad, in view of the situation of building DTM and the need of realizing railway 3D visual design, a divide-and-conquer algorithm to build DTM is presented, the algorithm use square grids to manage disordered points, to form triangular meshes in grids, DTM can be obtained by merging the triangular meshes, so that the work of sorting of the disordered points before building DTM is reduced greatly; moreover, the algorithm utilize subarea to control the vertices of convex hull so that the range which support points locate in can be predefined when searching support points, the workload of searching support points can be reduced and the speed of merging two triangulations is raised.

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