multiple adj. 1.多重的;复合的,复式的,多数的,多样的。 2.倍数的,倍。 3.【电学】并联的;多路的,复接的。 4.【植物;植物学】聚花的。 a man of multiple interests 兴趣广博的人。 n. 1.【数学】倍数。 2.【电学】并联;多路系统。 3.相联成组。 4.成批生产的艺术品〔画、雕塑、工艺品等〕。 common multiple 公倍数。 least common multiple 最小公倍数。
surface n. 1.表面;地面;水面;广场,空地。 2.外观,外表,皮毛。 3.【几】面;切口;【航空】翼面。 adj. 表面的;地面的,水面的;外观的,外表上的;(对高架及地下铁路说的)平地上的;(对矿井内说的)矿井外的。 an adjusting surface 【航空】调节板。 a supporting surface 【航空】支持面积。 a plane surface 平面。 surfaces in contact =rubbing surfaces 摩擦面。 look at the surface only 只看外表。 One never gets below the surface with him. 人们无法看透他的内心。 a surface raider 海上突击舰。 look below [beneath] the surface of things 看到事物的内部。 of the surface 外观上的,表面的。 on the surface 表面上,外表上。 vt. 为…装面[配面],对…作表面处理;使成平面;掘开…的地面;铺(路面);使(潜艇)浮出水面。 vi. 地面采掘,井外劳动;浮出水面。
4 . research on the tool path planning of parallel machine tool a method of fixture-free manufacturing, adaptive to parallel machine tool, has been briefly introduced . and we also did some research on the tool path planning of processing multiple surface with parallel machine tool 并联机床刀具路径规划的研究本文还对适合并联机床加工特点的“自动寻位?加工”方式进行了介绍,同时对并联机床加工复杂曲面的实时刀具路径规划进行了理论上的探讨和研究。
Abstract : in the field of optical wireless links, concentrators that are designed by the tools of nonimaging optics can be used to collect the light radiation and are more compact and have higher collection efficiencies than imaging concentrators . hemispherical concentrators are studied by ray tracing, then for several normal nonimaging concentrators : hemispherical concentrators, compound parabolic concentrators ( cpc ), dielectric totally internally reflecting concentrators ( dtirc ), simultaneous multiple surfaces concentrators ( sms ) and inhomogeneous media concentrators ( poisson bracket ), the design methods and the performances e . g . the gain and the field of view ( fov ) are compared as well as the application suggestion 文摘:在无线光通信领域,利用非成像光学设计的集中器能够聚集光辐射能量,而且相对于成像性集中器具有更紧凑的结构和更高的增益.利用光线追迹法对半球形集中器的性质进行了分析与研究.对好几种非成像集中器:半球形集中器,复合抛物线形集中器,介质内部全反射集中器,多表面集中器,多相介质集中器,从设计原理、增益和视场进行比较,并分析其应用场合
Based on the computer geometrical models of straight bevel gears built, a iso-parametric tool path algorithms which was fit for the machining of multiple surfaces has been designed . the algorithms can solve the problems which exist in machining multiple non-rectangle parameter surfaces and avoid the calculation of sufaces intersection 在建立直齿圆锥齿轮计算机模型的基础上,提出了适于多曲面加工的等参数线刀轨生成算法,避免了在对多张相邻非矩形参数域齿面进行加工时所产生的干涉问题,而且曲面无需求交,使得计算成本下降。