查询词典 projection

First, by using the properties of knots and the Jones polynomial, we research the relation between them, thereby involving in the projection diagram with n crossings, discuss the state S of the projection diagram L , through the properties of vertexgraph, Euler Formula, one studied the problem of the equal of the knots.

首先，我们利用纽结及琼斯多项式的性质研究了它们的关系，进而涉及了有n个交叉点的纽结投影图，对其投影图L的状态S进行讨论，并通过四岔地图，欧拉公式等性质，研究了纽结等价性问题。

A set of complex Morlet wavelet are applied on projection slice of each direction to decompose each projection into several frequency channels,the average and variance extracted are computed in each frequency channel,and then linear regression model is employed to computer realationship feature between frequency channels.1-D DFT is applied to features and the amplitudes of Fourier coefficient are selected as features,then the extracted features are rotation invariant.

该算法是将一定大小的图像进行二维傅里叶变换；其次在变换后的图像中央选择一个圆盘区域，并在方向［0°，180°］内进行等间隔角度频率抽样，实现方向分解，使用一组复Morlet小波对每个方向上的映射切片进行小波变换，从而实现多通道频率分解；在各个频率通道中计算均值和方差作为特征，并利用线性回归模型计算频率通道之间的关系特征；将特征沿方向进行一维傅里叶变换并取其幅值，从而得到旋转不变性特征。

This paper systematically states the basic concept of map projection,the map projection transformation,the Gauss zone dividing porjection.

系统阐述了地图投影、地图投影变换、高斯投影及其分带投影的基本原理。

Finally, the paper presents a relatively complete plan for the reform of course system regarding such special topics as projection principles and basic drawing skills, applied foundation of projection graphics and general purpose computer assisted graphics software, mechanical drawing and general purpose computer assisted drawing software, special computer assisted drawing topics, etc.

多媒体计算机辅助教学以其声音、图像、动画、文字为一体的技术特点，为教学手段的现代化及教学课程体系的改革带来了很好的机遇。

Keywords : AFSA;neural network;coupling regress model of projection pursuit;projection direction;threshold;Hermite polynomial

应用神经网络的投影寻踪耦合回归模型存在优化问题，学习过程中运用人工鱼群算法进行优化，进而获得最佳的投影方向、阈值和正交Hermite多项式系数。

First, an initial projection matrix is obtained through homography between an image and a scene plane. The homograph matrix between two images, i. e., the image plane and the scene plane, can then be calculated from matching points of these two images. Thus the projection matrix of every next frame can be calculated from homograph matrix between the current image plane and the previous one. Registration of virtual objects is finally completed.

根据这个原理，首先通过一个景物平面和图像之间的单应得到初始状态相机的投影矩阵，然后对后面每帧图像和前一帧进行自然特徵点匹配，通过匹配点对计算出图像之间以及图像与景物平面的单应关系，由此就可以得到每一帧图像对应的相机的投影矩阵，从而完成虚拟物体的注册。

Following this, we make the binary image vertical projection and horizontal projection.

单个身份证号码图像分割也是身份证号码识别的关键步骤。

The use of level detection projection plates horizontal position, using vertical projection method detection plates vertical position.

利用水平投影法检测车牌水平位置，利用垂直投影法检测车牌垂直位置。

The right and left borderline of face is approximately determined according to improved vertical gray-level projection, and the height of human eyes is also approximately determined according to horizontal gray-level projection.

该算法先利用改进的人脸图像的垂直灰度积分投影确定脸的左右边界，再根据人脸图像的水平灰度投影曲线来确定眼睛的大致高度。

Edge detection ; Vertical gray level projection ; Horizontal gray level projection ; Valid peak ; Hough transform

边缘检测；垂直灰度投影；水平灰度投影；有效波峰；霍夫变换

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％。