查询词典 projective pencil of lines

As a geometric invariant under projective transformations, cross-ratio is the basis of many recognition and reconstruction algorithms.

交比不变性在此类投影转换中，扮演了一个重要的角色。

Based on inclusion exclusion principle of set theory,a new algorithm to calculate the whole projective area was put forward to those overlapped complex geometrical objects in any direction.

在此基础上，根据集合论中的包含互斥理论，提出了一种求取多个复杂几何形体在任意方向的投影面积的新算法。

Results Univariable analysis showed that occupational injuries had significant relationship with age,sex,education,employment pattern,technology,workplace,work changing,wage,family income,enterprise scale,enterprise proprietorship,projective device,operation rules,and training rules of work safety.

结果 单因素分析结果有显著性意义的变量为年龄、性别、文化程度、就业类型、技术等级、就业地点、工作变换、月均工资、家庭年收入、企业规模、企业性质、安全防护设备、安全操作规程和安全教育制度。

Khanchian's ellipsoidal algorithm and Karmarkar's projective rescaling algorithm for linear programming were proved of polynomial time a...

Khanchian的椭球法和Karmarkar的投影尺度法，证明了线性规划问题确实存在多项式算法。

Khanchian"s ellipsoidal algorithm and Karmarkar"s projective rescaling algorithm for linear programming were proved of polynomial time algorithm.

Khanchian的椭球法和Karmarkar的投影尺度法，证明了线性规划问题确实存在多项式算法。

The fixing structure for preventing screen filter from bending and distortion possesses following characters of structure: screen for focusing projective light from back side; filter in front of the screen; bracket having pinholes installed at certain position at back side of the filer; holding frame having pothooks for to be inserted into pinholes and fixing the filter into device case.

本发明将涉及一种可以防止发生设在屏幕前面的滤光片的弯曲和变形的图像显示设备的屏幕滤光片固定结构，具有下述的结构特征：设有从背面投射的光线得以结像的屏幕；设有设在屏幕前面的滤光片；设有安装在滤光片背面一定位置上的形成有针孔的托架；设有使滤光片固定到机壳上的，而且形成有挂钩，以便能插入针孔中的支撑架。

In Higher geometry , one of important points is to study graphic invariance and invariant in terms of projective trans formation and the feafures of prime and combination are its main and constant oners.

在高等儿何中，它的一个重要内容是研究图形在射影变换下的不变性和不变量，而同素性和结合性又是它的主要不变性质。

As the contour of a wheel rim is easier to detect than the contour of a wheel, and the contour of a wheel rim and the contour of a wheel are approximately concentric circles on the same plane, we first detect the contour of the wheel rim, the center of the wheel rim and the contacting point between the wheel and the ground, then we detect the contour of the wheel via the invariance of cross ratio under projective transformation.

由于提取钢圈轮廓比提取车轮橡胶轮廓容易，而且钢圈轮廓和车轮轮廓可以近似看作同一平面上的两个同心圆，所以在本文中，我们首先提取钢圈轮廓、钢圈圆心和车轮与地面接触点在图像上的投影，然后利用射影变换保持交比不变的性质求出车轮轮廓。

The article uses the theory of projective geometry to determine the polar and pole of self-conjugate of nonsingular conic without thinking about measure.

用射影几何的理论，抛开度量性质，给出了非退化二次曲线自共轭的极线与极点的射影定位，为现代设计提供了理论依据。

Because of her projective identification, Fern saw Donald as the good son who needed

由于投射性认同，Fern把Donald看作需要特别关爱和照顾的好儿子。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。