特征方向

A host of studies since the mid-1990s have found common biological traits between gay men, including left-handedness and the direction of hair whorls.

一系列上世纪90年代中期的研究发现了同性恋者共有的生理特征，包括左利手和头发漩涡状排列方向。

To improve the computational efficiency,the scattering phase function is expanded and truncated as the summation of orthogonal polynomials such as Legendre function.

在有限计算资源的限制下，寻找最优的有限展开算法，获得能量守恒物理要求下的散射方向特征的准确性，是多年来辐射传输算法的追求目标。

By projecting 3D models into 1D smooth principal curves, equally segmentation and sampling along the length of curve are implemented to extract shape feature vectors, then one can retrieve 3D model according to the matching result of shape feature vectors of 1D manifold.

本文将三维网格模型，投影为三维的光顺主曲线；通过对主曲线沿弧长方向的均匀分割采样，提取主曲线的空间位置和姿态等形状特征；最后通过形状描述向量的比较实现了对应的三维模型检索。

But Gabor filter is also very sensitive to the changes of ridge line direction and frequency,which leads to severe loses and changes of fingerprint feature in actual practice.

但是Gabor滤波器对纹线方向和频率十分敏感，通过处理灰度图像得到的二值图像存在着严重的特征点丢失和变化问题。

Gabor filter could better extract the local features of images because of its selectivity on scale and orientation, and it is robust to variances of lighting, pose and expression. The common vector is a linear subspace classification method, which can obtain good classification results by extracting the common property of each class training samples.

Gabor滤波器因其良好的方向与尺度选择性，能很好地提取图像局部特征，对光照、姿态、表情变化有一定的健壮性；共同向量方法是一种线性子空间分类方法，利用提取的同类样本的共同属性对测试样本进行分类，在训练样本较少的情况下能够取得较好的分类效果。

This approach effectively overcomes the shortcoming of the grey level intensity based detection approaches. Not only it can extract the local extremum along with the contour, but also it is robust to the noise in the range images.

该方法克服了基于强度特征的检测方法中存在的一些缺陷，能够有效得提取关键点在轮廓方向上的极值性，并对轮廓上的噪声也有很好的抑制效果。

From macro to micro and from qualitative to quantitative evaluation, this paper, applicating the theory and technological method of sequence stratigraphy、seismic stratigraphy、 reservoir sedimentology, combining with multispecialty and mutisubject theory that used geology, log, seismic, mathematics and earth physics and basing on synthetic application of regional geology, core, log, seismic and petrophysical property data, has studied the inner structure and characteristic of sequence、system tract and depositional system. Combining with high resolution seismic data and log data, this paper makes a profound analysis of the space pattern and reservoir predictability of depositional system on oil and gas pools of honghaoersute sag.

中文题名陆相断陷湖盆层序地层特征与油气勘探副题名以二连盆地洪浩尔舒特凹陷下白垩统为例外文题名 Terrigenous sequence stratigraphy characteristic hydrocarbon exploration of fault-depressed lacustrine basin：a case study of early cretaceous，Honghaoersute sag，Erlian basin 论文作者谭荣导师赵霞飞教授杜金虎教授级高级工程师学科专业矿产普查与勘探研究领域\研究方向陆相层序地层学与区域油气评价学位级别博士学位授予单位成都理工大学学位授予日期2002 论文页码总数128页关键词层序地层油气勘探二连盆地洪浩尔舒特凹陷油气藏馆藏号BSLW /2002 /P618.13 /325 本文采取从宏观到微观，从定性到定量的研究思路，应用层序地层学、地震地层学、储层沉积学的理论和技术方法，结合区域地质、岩芯、测井、地震、物性资料，采用多专业、多学科理论和方法相结合。

Facing the global integration macroclimate influence, the Chinese movie has lost the direction, the constantly pursue big manufacture, discusses the spare-time university piece, moves towards Oscar, the trend world, but unintentional desalination own national characteristic this characteristic.

面对全球一体化的大气候的影响，中国电影迷失了方向，一味的追求大制作，商业大片、走向奥斯卡、走向世界，而有意无意的淡化了自己的民族性这一特征。

Finally, a fine estimation can be acquired by the combination of estimation results from both Hough transform and major axis extraction.

在此基础上，基于Hough变换检测目标轮廓的直边，基于轮廓特征点检测获得目标主轴的大致方向，结合Hough变换检测结果与目标主轴信息获得最终的方位角估计。

This approach was based on the NonSubsampled Contourlet Transform. The means and variables of NSCT coefficients matrix in different subbands and various directions were extracted to form the feature vectors which were regarded as indexes of texture images in image database. Two similarity functions were used to compute the similarity between images. A texture retrieval system based on query image was developed.

该方法利用非下采样Contourlet变换对图像进行分解，提取不同子带和不同方向变换系数矩阵的均值和方差为特征向量，作为数据库中纹理图像的索引，并利用两种不同的相似度函数计算图像之间的相似度，建立了一套基于示例查询图像的纹理图像检索系统。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。