确定方向

Feasible region of unit-sphere was defined by standard if angle between normals and stamping direction was less than 90°.

以冲压方向与网格法线夹角不大于90°为冲压方向可行的判据，确定在单位球面上的冲压方向可行域。

He couldn ' t decide which way they should escape, English, Fitz or Percy.

他无法确定，他们究竟应该从哪条路出逃，向英国方向，向费兹方向还是向珀西方向。

Proof of this has usually rested on demonstrating that individuals whose ability to perceive the magnetic field is disrupted (by having small magnets attached to them or by being kept in cages surrounded by Helmholtz coils) cannot orient correctly, whereas control animals can.

要证明这一点，通常要用实例显示：如果动物个体的感知磁场能力受到破坏(通过在它身上系上小块磁条，或者把它关在由赫姆霍尔茨线圈包围的笼子里)，那么它就不能确定正确的方向，而对比动物却能够确定正确方向。

The normal directions of light stripes in an image are determined by using Hessian matrix.

利用Hessian矩阵确定图像中光条法线方向，在光条法线方向上求解光条中心亚像素位置，用8方向搜索法剔除干扰光条。

Diaphragm movement in the direction we are through,"Fleming left hand rule"(also known as "motor rule") determined by when the audio signal source is positive when the right side, the diaphragm in the opposite direction and plans, so that when the audio The size of the signal, changing direction, the diaphragm of the vibration on the subsequent non-stop, and its current size of the rate associated with the audio.

振膜运动的方向我们是通过"弗莱明左手定则"确定出来的，当音频信号源右端为正时，振膜的方向与图中相反，这样当音频信号的大小、方向不断变化时，振膜就随之不停的振动，其幅度与音频电流大小相关。

First, the proposed scheme uses contourlet transform to extract multidirectional and multiscale texture information, and then obtains the feature points invariant to the affine transformation from the low and middle directional subbands by Harris-Affine detector. Second, the feature regions are adaptively computed by the feature scale of the local structure and normalized by U transform. The watermarking is embedded adaptively in those characteristic regions which are normalized. Finally, by vector quantization, several copies of the watermark are embedded into the no overlapped local feature regions in different directional subbands.

首先，用Contourlet变换提取出多尺度、多方向的纹理信息；再用Harris-Affine检测算子从变换域的中、低频方向子带中提取出仿射不变特征点，结合自适应局部结构的特征尺度确定特征区域，并用U变换对其归一化处理，水印就自适应地嵌入到归一化后的区域中；水印嵌入采纳矢量量化的策略，将水印信息重复嵌入到不同方向子带、多个不相交的局部仿射不变特征区域。

Introduced the linear uncertainty propagator and derived how one finds the directions at initial time that evolve into the directions of the principal axes of the final time ellipse, and proved that the initial time directions form an orthonormal basis.

介绍线性不确定传播子，推导其如何得到起始时刻的方向，并且这个方向会演变成最终时刻椭圆的主要轴的方向。证明起始时刻的方向构成了标准正交基底。

So considering uncertainty variety of spatial data because of it, this paper introduces centriod as a reference point, and expanded uncertainty parameter changed with variable scales in 16-direction relation cone-shaped model and describes them with formalization. The model partitions the direction relations with smooth transition regions, which accord with percipience on direction concept description.

本文考虑了由此带来的空间数据不确定性变化，用质心作为参考点，并在16方向模型中添加了不确定度的参数，来适应尺度变化引起的空间关系的变化，并对其进行形式化描述，以更好的描述空间关系，使得方向关系的划分上有个平滑的过渡区，在方向概念的表达上更符合人的认知。

The system utilized four laser scanners along lengthwise direction of the log. Data are obtained in every ten degrees when log is turning, in each cross section, 36 data are obtained. Then the data obtained were processed and an outline of the cross section of the log was developed on computer screen. Afterwards, the largest inscribed circles for log cross sections were determined according to the principle that three points can determine a circle. Secondly, the points located on the cross sections were linked up along some log generative in order to simulate the three-dimension log outline. At last the largest right circular cylinder were optimized and the optimum turning center was determined by means of projective theory.

具体作法是：在木段长度方向均匀设置四个激光传感器，当木段旋转时，起动激光传感器，进行数据采集，每隔10~0扫描一个点，在各横断面圆周上共采集36个点的数据，由计算机处理采集的数据，并绘制出原木横断面的几何图形，再根据三点定圆的原理，确定出最大内接圆；其次，模拟原木三维廓形，即将原木相邻横断面上离散点沿着母线方向连线，由计算机分析处理，绘制原木三维廓形；最后，采用投影法，优化出原木最大内接圆柱体，并确定原木回转中心线。

The proposed robust road main direction detection method consists of initial main direction extraction based on the direction histogram of structure tensor and precise direction detection on vectorized edge image. Experiment results demonstrate its robustness and precise. The proposed Gibbs-sampling-based method models road network with marked point process and can effectively extract road network with initial configuration. However it is slow and still can not deal with single and isolated road segment. These problems can be solved by the real-time method. And experiments verify that the real-time method is fast during extracting road segment.

提出的稳健道路局部主方向提取算法以结构张量为基础，通过方向直方图确定大致主方向，并通过矢量化边缘进一步计算准确的方向角，实验结果表明具有良好的稳健性和准确性；提出的基于Gibbs采样的交互式道路网提取方法采用标记点过程对道路网进行建模，在给出初始构造项的情况下，能有效的提取出指定道路网；提出的实时交互式道路段提取算法弥补了上一方法无法处理单一直线道路段和计算过程慢的不足，是上一方法的有益补充，实验结果表明算法能快速提取道路段。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。