查询词典 contour curve

Curve functions of axial buccal crown and gingiva contour of each section were acquired by means of curve fitting, and the angle of emergence pofile was calculated, which represents the degree of undercut. Results There is unique relationship between axial crown and gingiva contour individually. This character of tooth is similar to its contralateral tooth.

结果 不同个体的牙冠轴面外形和牙龈外形有其特定的几何关系，同一断面的牙冠轴面外形曲线对应特定的牙龈外形曲线；同名牙同一断面的牙冠轴面外形之间及牙龈外形之间的重叠性很好。

On the basis of the study on the mathematical model of the closed-loop location control, the analysis of contour error in the process motion control and error calculation model, according to the lack of using normal contour error model not to calculate contour error of curve in real-time, combining real-time contour error compensation control strategy and fuzzy logic theory, the fuzzy logic and real-time contour error calculation based self-discipline control strategy is proposed.

2在研究闭环位置控制数学模型、加工轮廓运动控制中的误差分析和轮廓误差计算模型的基础上，针对利用一般运动轮廓误差计算模型不能实时计算出曲线轮廓误差的不足，结合实时轮廓误差补偿控制策略和模糊逻辑理论，研究了基于模糊逻辑理论和实时误差计算的轮廓自律控制策略。

The parameterization of section contour data is carried out by the method of accumulated chord length, the reasonable math model on the selection of node vector is given, the approximating of NURBS curve to section contour data is carried out by the least square method and the most reasonable number of control point is obtained by the dimidiate algorithm, which makes the approximating of NURBS curve reach the extent of complete automation.

用积累弦长的方法对截面轮廓数据进行参数化；给出了节点矢量选择的合理数学模型；用最小二乘法对截面轮廓数抛进行了NURBS曲线的拟合；二分法寻找最优控制点的算法使NURBS曲线的拟合达到全自动化的程度。

In the key step of this method (the process of contour tracking), the paper puts forward the concept of grid right-correlation flag to determine the initial segment of tracking curve. In the tracking procedure, the trend of subsequent points are determined by the combinatorial values of neighborhood cells, and a method is designed to avoid contours crossing. In order to obtain high-quality contour line, it adopts it adopts the linear interpolative method to show a contour chart of accurate localization and better visual effect.

在该方法的关键过程中，提出栅格右关联标志的概念，并据此确定初始追踪段；追踪过程中依据邻域栅格值的组合特征确定后续点的走向，设计了避免等值线交叉的处理措施；为获得高质量的等值线图形，采用线性插值方法，得到准确定位和视觉效果较好的等值线图形。

The result shows that the convergence of active contour curve is not only depended on the image gradient,but also the target region.

简单地讲，主动轮廓模型是一条由相应能量函数控制的可形变参数曲线，以能量函数最小化为目标，控制曲线变形，具有最小能量的闭合曲线就是目标轮廓。

Based on periodic Daubechies wavelet coefficients feature of the description function, the global matching problem and the local matching problem of the contour curve are discussed.

摘要利用形心点和Aggarwal的形殊点，定义了轮廓形状的描述函数和起始点，并运用描述函数的Daubechies周期小波系数特征，讨论了闭合轮廓曲线的整体匹配和局部匹配问题。

At last,the closed contour curve of treatment region of mode B ultrasonic monitoring image is obtained by morphology post-processing.The results show that the size of treatment region can be detected better from mode B...

结果证明：该方法克服了传统图像分割方法阈值难以确定的瓶颈，能够更好地从B超图像中检测出HIFU治疗区域的大小。

The energy function is mainly made of intra-region similar properties based on proximity principle when contour curve is situated near the object edge.

该模型符合知觉特性，是几何活动轮廓模型的一般形式，且融合图像区域信息和边界信息。

In this dissertation, based on the systematically analysis of theory and application research on deformable model, a new B-spline active contour based on the finite element method is proposed; then B-spline active contour is applied to fitting the digital curve cross-sectional contour, and adaptive FEM is adopted to improve the precision; lastly the model is generalized to 3D, and a B-spline active surface model based on FEM is proposed.

本文在系统地分析了国内外关于可变形模型理论与应用研究的基础上，提出了一种基于有限元法的B样条主动轮廓模型；并将其应用于由断层图像导出的截面轮廓数字曲线的拟合，利用自适应有限元技术提高拟合精度；最后将其推广到三维，提出了基于有限元法的B样条主动曲面模型。

Intake efficiency is the most fundamental and important parameter for engine performance, yet the open and close timing as well as the lift depth of the intake valves are determined by the contour curve of the camshaft, that means the valve timing and lift depth are constant and fixed.

进气效率，是引擎最基本也是最重要的性能参数之一。而进汽门的开启时间与关闭时间以及扬程的大小是经由凸轮轴的轮廓曲线所决定，亦表示汽门正时与扬程是固定不变的。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了