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 meridian projection 子午线投影(0)子午投影(4)
 子午投影
 The Application of An Arc Meridian Projection to The Engineering 圆弧子午投影在工程中的应用 短句来源 Establishing Contour Equations of Revolving Curved Surface by Meridian Projection Method 用子午投影法建立回转曲面轮廓线的方程式 短句来源 With this view point, all other meridian projection equations of lines in special positions, and the curved surface formed by the meridian projection after being rotated are presented. 文中通过方程式的推导,论证了上述观点,并以此为基础,进一步论述了各种特殊位置直线的子午投影的方程式,以及这些子午投影旋转后所形成的曲面。 短句来源 In accordance with the properties of the engineering curved surface and the principle of an arc meridian projection,by example,the application of an arc meridian projection to the drawings of the vane wheels and blades of pumps fans,turbines and other parts is discussed. 根据工程曲面特性和圆弧子午投影原理，以实例论述了圆弧子午投影在绘制泵、风机、水轮机叶轮和叶片等零件图中的应用。 利用圆弧子午投影法将曲面进行投影，曲面的投影具有积聚性，且能直接反映曲面形状和某些性能尺寸，大大简化作图，为零部件的设计和生产打下良好基础。 短句来源
 相似匹配句对
 The Application of An Arc Meridian Projection to The Engineering 圆弧子午投影在工程中的应用 短句来源 Projection Study 投射研究 短句来源 MATRIX OF PROJECTION 投影矩阵 短句来源 Establishing Contour Equations of Revolving Curved Surface by Meridian Projection Method 用子午投影法建立回转曲面轮廓线的方程式 短句来源 Discussing the Meridian and Collateral 论经络 短句来源

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 Based on the two Characteristies of meridian projection, i.e, the distance from geometric element to either the rotation axis or the horizontal projection plane is constant, the auther establishes the meridian projection equation for a line by using this two constants, so that the contour equation for a revolving surface can be derived. By this method, the 3-d space equation of the curved surface can be replaced by a plane equation. With this view point, all other meridian projection... Based on the two Characteristies of meridian projection, i.e, the distance from geometric element to either the rotation axis or the horizontal projection plane is constant, the auther establishes the meridian projection equation for a line by using this two constants, so that the contour equation for a revolving surface can be derived. By this method, the 3-d space equation of the curved surface can be replaced by a plane equation. With this view point, all other meridian projection equations of lines in special positions, and the curved surface formed by the meridian projection after being rotated are presented. 强调了子午投影法的两个特点,即几何元素至回转轴和至水平投影面的距离都不改变。提出以这两个不变量建立直线的子午投影的方程式,也就是确定回转曲面轮廓线的方程式。以二维的平面曲线的方程式代替了三维空间曲面的方程式。文中通过方程式的推导,论证了上述观点,并以此为基础,进一步论述了各种特殊位置直线的子午投影的方程式,以及这些子午投影旋转后所形成的曲面。 In accordance with the properties of the engineering curved surface and the principle of an arc meridian projection,by example,the application of an arc meridian projection to the drawings of the vane wheels and blades of pumps fans,turbines and other parts is discussed. 根据工程曲面特性和圆弧子午投影原理，以实例论述了圆弧子午投影在绘制泵、风机、水轮机叶轮和叶片等零件图中的应用。利用圆弧子午投影法将曲面进行投影，曲面的投影具有积聚性，且能直接反映曲面形状和某些性能尺寸，大大简化作图，为零部件的设计和生产打下良好基础。 The relation between central meridian & projection plane choice and the distortion value of projection length of areas was discoursed on, and then the essentiality to make use of intrinsic coordinate system was explained. Through coordinate conversion, making use of former data, not only enables the method to satisfy precision requirement and economize capital, and offer lessons from experiment for reference of engineering alike. 论述了建立独立坐标系时中央子午线及投影面的选择与各地区投影长度变形值的关系,说明了尽量利用原有坐标系统的重要性。建立台州市首级平面控制网时,通过坐标转换,充分利用旧有资料,既满足了精度要求,又节约了资金,为同类工程提供了借鉴。
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