When creating animation one should try to have motion follow curved paths rather than linear ones 当做动画的时候你应该让动作沿着曲线运动而不是线性的直线。
3.
Since this frame of reference - the earth ? is rotating , motions that would be straight in a stationary frame of reference appear curved to the observer on earth 由于参照系?地球?是旋转的，所以在静止参照系中应是呈直线运动，在地球上的观测者看来就成为曲线运动。
4.
Confident and attentive , submits generously to the control of the rider , remaining absolutely straight in any movement on a straight line and bending accordingly when moving on curved lines 它完全顺从骑手的驾驭，自信而且专注，在直线上做任何动作时，保持绝对正直，在曲线运动时马体随之曲绕。
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The principle of gacm is the same with one of the traditional model of active contour , that is , the model searched and exacted the object contour by cooperation of the curve inner control force as well as the image force 短程线主动轮廓模型的基本思想和传统主动轮廓模型一样,是在曲线内部控制力和图像力相互作用下使曲线运动到物体轮廓来完成对物体轮廓的搜索和提取。
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At first , we introduce some common target motion models , and analyzes the advantages and disadvantages of them . then , we study some turning motion model , and then puts forward a curve motion model and its brief model based on the particle 首先介绍了几种常用的目标运动模型,并简要分析了它们的优点与不足;然后介绍了几种转弯运动模型,提出了一种基于质点的曲线运动模型及其在特定条件下的简化模型。
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By the simulation , it is indicated that the curve motion model based on the particle can describe the curve motion of the target . and it is shown that the performance of the ukf algorithm is more precise than the tradition nonlinear filtering technique . by the contrast between the simulation results and the positioning result of commercial data process software , 仿真结果表明,基于质点的曲线运动模型可较准确地描述进行曲线运动的载体; ukf算法作为卫星导航系统的非线性滤波技术,较之传统的线性滤波技术可获得较高的定位精度;其定位结果与商业数据处理软件相比,可满足定位精度要求,该算法可以直接应用于卫星导航系统的软件实现。
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When we make concessions , fall back , turn to the defensive or halt our advance in our relations with either allies or enemies , we should always see these actions as part of our whole revolutionary policy , as an indispensable link in the general revolutionary line , as one turn in a zigzag course 我们的让步、退守、防御或停顿，不论是向同盟者或向敌人，都是当作整个革命政策的一部分看的，是联系于总的革命路线而当作不可缺少的一环看的，是当作曲线运动的一个片断看的。
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Parametric active contour model to deal with automatic segmentation of weak edge medical image . based upon analyzing balloon force model , a minimum variation snake model is proposed and successfully applied to segmentation of weak edge medical image . in the model , variable force incorporating the information of foreground and background regions replaces constant force in the balloon snake model 高斯力和气球力等传统的参数活动轮廓模型难以处理弱边界医学图像自动分割问题,在气球力snake模型基础上,提出最小方差snake模型,该模型将气球力snake模型中的恒定气球力修改为包含区域信息的变力,以目标和背景两区域具有最小方差为准则,引导轮廓曲线运动。
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The contacting measurement method with a double probe is put forward after the detailed analysis of the state - of - the - art measuring methods of the thickness of wall . firstly , the theory - profile generatrix is built , and then the movement curve of the track of joint center is constructed , which aims at making the joint center move along the movement curve and keep the fixed sensor touching the wall . the measuring sensor examines the line in its normal direction of the interior wall all the time , the data from the sensor is the thickness value of the wall 论文通过分析国内外变曲率回转体壁厚测量的现状,提出了双测头接触式测量方案:通过构造理论轮廓母线,建立铰链中心的运动曲线,使铰链中心始终沿运动曲线运动,以保证固定触头与传感器测头的连线始终在内壁法线方向上,从而传感器测头所得的数值即为壁厚值,该方案经模拟测试实验取得了预期效果。
