查询词典 reverse

This surface works a bit like a giant radio telescope dish in reverse: Rather than focusing parallel astronomical light rays to a point, it collects the scattered plasmons emerging from a tiny sample--positioned strategically near the mirror--and redirects them into a plasmon "beam" in the metallic plane.

这个表面的工作原理相当于一个倒置的巨型射电望远镜的盘面，不同于天文望远镜把平行的天体光线会聚到一点，这一设计起到的作用是收集从一个位置恰好位于像点的微小样品散射出来的等离激元，并把他们重定向成金属平面上的一个等离激元束。

The aim of this research is to realize parallel surface design of casting and its mould based on reverse engineering.

研究目的是通过逆向工程方法实现铸件曲面及其模型曲面的并行设计。

With regard to CAD modeling in reverse engineering, some key techniques, including feature extraction from point cloud and parametric representation, are studied.

本文针对反求工程CAD建模路线：从点云提取特征曲面，再进行曲面参数化CAD造型过程中非常关键的步骤——特征提取进行了深入研究，着重研究了二次曲面特征的提取，并对点云中的全局特征约束优化技术进行了有益的探索。

An artificial method of constrained coassembling process plan based on VRML model includes setting slide – rotary connection constraint; selecting artificial assembling body model; confirming constraint type of each component to its front or back end component in open or closed loop mechanism; calculating translation and rotary matrix of each component in moving course and its position parameter; generating time – order – path matrix and key frame as per time section; writing each key frame in reverse mode into interpolator of each component VRMC model; adding route in sequence between time and position sensors, position sensor and component form node for generating artificial picture.

本发明属于CAD协同产品设计技术领域，其特征在于：在网络环境下，设计者依托装在节点机上的三维VRML模型，以设计者与设计场景交互方式按照以下步骤实现有约束协同装配工艺规划：设定滑动转动联接约束；选定仿真装配体模型；确定开环或闭环机构中各零部件与它的前端和后端部件的约束类型；计算各零部件在运动过程中的平移和转动矩阵，再根据相应的约束计算运动过程中各零部件的位置参数；再据此生成零部件的时间-顺序-路径矩阵，按时间段形成关键帧；把各关键帧分别以逆序写入VRML各部件模型的插补器，依次在时间传感器和位置传感器之间、位置传感器和零部件造型节点间加入路由，生成仿真画面。

To offer a direct path for integration of reverse engineering and CAx system,machined features recognition based point cloud data was put forward.

为了提供逆向工程系统和CAx系统集成的直接通道，提出了针对点云数据建立属性邻接图的算法，并利用属性邻接图实现加工特征自动识别。

The reverse of the medal features the "PEACE AND FRIENDSHIP" symbol with two hands clasped in token of amity; on the cuff of the left wrist three stripes with buttons, each button carrying the American eagle; the other wrist is bare; above the hands, crossed, the pipe of peace and the tomahawk.

英文译成中文："乔治华盛顿，美国总统1789年"，"和平与友谊"的象征，与二手被在象征性的友好；就袖带的左手腕有三条条纹与按钮，每个按钮进行美国鹰；其他手腕是裸露；上述手中，横过，该管的和平与战斧。

It could have been three, minutes later, as a delightful reverse pass from Sam-Yorke released Arter on the left side of the penalty area. His fierce shot was deflected away for a corner.

一分钟后沃金本应打入第三球，萨姆约克一次漂亮的回传使阿特尔在禁区左侧无人防守处得球，他的大力射门反弹后形成了角球。

With reverse osmosis technology as an example, the application of membrane technology in the treatment of urban garbage percolate is introduced emphatically.

以反渗透处理技术为例，重点介绍了膜处理技术在城市垃圾渗滤液处理中的应用。

Characterization of CGRP in perfusate showed one predominant peak to coelute with synthetic rat CGRP by reverse-phrase HPLC.

经反相高压液相分析，内毒素灌流所得馏分的CGRP免疫活性峰位在第40min，与大鼠CGRP标准品的峰位吻合。

Every financial crisis and economic crisis comes along with the liquidity reverse: from excess to crunch and the liquidity reversal has also become a periodic law.

每一次金融危机、经济危机都伴随着流动性从过剩到紧缩，而流动性逆转也成为周期性规律。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。