A new method to extract blend surface feature is presented according to the common features of blend surface in reverse engineering.
针对反求工程中常见的过渡曲面特征，提出了一种过渡曲面特征的提取算法。
And various methods of modelling, that is, contour maps, engineering maps with surface feature symbols, 3 D contours and realistic maps are given.
给出了平面等高线地形图，带地物符号的工程地形图，立体等高线图及逼真地形图等多种造型方法。
In this paper, we designed the classification rules of surface feature, then illustrated the process of part information describing for an example of rotating parts.
文章提出了形状特征的分类原则，并以回转体类零件为例，介绍了零件信息描述的过程。
The experimental results show that as far as crack resistance of concrete is concerned, the surface feature of coarse aggregate is more sensitive than aggregate shape.
试验结果表明：集料的表面特征对混凝土抗裂性的影响比集料的颗粒形状更为敏感。
Spectral data sources of sandy land included single surface feature and composite surface feature, and their spectral data were measured by different sampling methods.
沙化土地光谱数据源分为单一地物类型级和复合地物类型级两种，野外测量时分别采取不同的采样方法。
The surface feature of aggregate, which have been pretreated by chemical method, and the structure of interfacial zone between aggregate and cement paste are studied.
研究了用化学方法处理后的骨料表面与界面过渡区结构特征。
Shallow earth temperature is influenced by surface temperature change everyday and every year, topographic change, elevation change and surface feature change, so it should be corrected.
浅层地温受到地表气温的日、年变化、地形变化、高程变化和地貌变化等的影响，应对实测值进行相应校正。
Hyperspectral remote sensing is a new technology, and this technology brings people strongly method of accurately-identify surface feature by means of acutely ability of spectral feature detecting.
高光谱遥感是一种全新的遥感技术，这项技术以其敏锐的光谱特征探测能力为人们精确认识地物属性提供了强有力的手段。
Main contents in relation to the hybrid modeling method are discussed, and some key techniques such as quadric surface feature extraction and blend surface feature extraction are addressed in details.
讨论了混合建模方法的主要研究内容，并研究了二次曲面特征和过渡曲面特征提取。
Surface feature spectrum data is the basic materials of remote sensing technology, and the relation bridge to establish ground data and remote sensing.
地物光谱数据是遥感技术之基础资料，是建立地面数据和遥感数据关系的桥梁。
Surface feature spectrum data is the basic materials of remote sensing technology, and the relation bridge to establish ground data and remote sensing.
地物光谱数据是遥感技术之基础资料，是建立地面数据和遥感数据关系的桥梁。
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