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The present invention discloses a method for determining the two-dimensional geometry relationship of crystal reciprocal vectors in EBSD pattern. The method comprises: using the pattern center PC and the probe distance DD to geometrically correct a Kikuchi band so as to obtain the reciprocal vectors corresponding to the Kikuchi band; selecting a group of the reciprocal vectors having the smallest parallelogram area on the reciprocal surface as two-dimensional base vectors so as to form grid, and marking the two-dimensional base vectors; calibrating the integer coordinates of the rest reciprocal vectors on the surface relative to the two-dimensional base vectors, obtaining the deviation values between the integer coordinates and the adjacent grid nodes, and marking the integer coordinate having the smallest deviation value; using the marked reciprocal vectors and the integer coordinates relative to the two-dimensional base vectors to fit the length and the included angle of the two-dimensional base vector, and using the fitting result to redefine the two-dimensional grid; and repeating the steps until all reciprocal vectors on the reciprocal surface are marked, wherein the integer coordinate of the reciprocal vector on the surface relative to the two-dimensional base vector discloses the two-dimensional geometry relationship of the reciprocal vector.

The present invention relates to a process for the preparation of ethylene oxide (EO) capped polyanols in which it is not necessary to remove catalyst residues or salts formed by neutralization of base catalysts before discharging the polyol from the reactor, which is This is because the neutralization occurs during or after the starter filling of the next batch. The method of the present invention may allow the preparation of DMC-catalyzed intermediates and their base-catalyzed EO capping in the same reactor. The polyols prepared by the method of the present invention have a high content of primary hydroxyl groups, and they can be used to prepare polyurethane foams, elastomers, sealants, coatings, adhesives and the like.

The invention provides a method for obtaining the height of a point cloud pavement in Unity. The method comprises the steps of obtaining a point cloud map of a whole scene, segmenting the point cloudmap to obtain a plurality of blocks, carrying out point cloud height calculation on each block of point cloud, outputting a result and the like, and exporting height information of each block of pointcloud to obtain height information required by a road surface. According to the method, the advantages of the Unity engine are fully utilized; the point cloud ground height information can be rapidlyand accurately generated, data flow processing is accelerated by utilizing some parallel processing methods, the point cloud road surface height information and subsequently added road surface elements can be automatically obtained, the point cloud road surface height information and subsequently added road surface elements can be automatically attached to the road surface, the workload requiredby manual adjustment is greatly reduced, and the probability of personal errors is also reduced.