特征

Facial thermogram minutiae is analogous to fingerprint minutiae in that two sets of minutiae may be considered to identify the same person if a significant number of the minutiae in the two sets have corresponding positions and characteristics.

温谱图细节特征点类似于指纹细节特征点，因为对于给定的两组细节特征点特征如果存在大量的一致点的话就可以可以确定一个人的身份。

In our new system, the image of temperature field on preheater rotor is obtained by full-radiation infrared thermometry.

本系统采用全辐射测温仪采集空预器转子表面的温度场分布图，预处理后提取图像特征，包括图像的灰度特征、小波能量特征、矩特征。

The feature points from two images were extracted by Harris corner detector, then the corresponding feature point pairs were got by the cross-correlation of the gray scale around the feature points, and the mismatched pairs were eliminated based on the Eulerian distance of the transformation parameter vector.

提出了一种基于特征点的图像拼接算法，首先利用Harris角点检测提取两幅图像中的特征点，用特征点邻域灰度相关性将特征点进行匹配，并在此基础上根据变换参数向量的欧式距离对误匹配进行剔除，进而实现图像拼接。

With the increasing of the overburden layer thickness or the dam height, the maximum value of response acceleration in dam body assumes gradually decrease, and its characteristic distribution is uniformization, and the response acceleration of the dam slopes decrease remarkably, and response acceleration of the dam top is less than the dam bottom.With the decreasing of the overburden layer thickness, the dam foots and their nearby soil response acceleration get increasing.

随着覆盖层厚度增大或坝高增大，坝体中的反应加速度最大值分布具有逐渐递减、均匀化的变化特征；坝坡体的反应加速度递减显著的变化特征，坝顶反应加速度较坝底反应加速度小的特征；覆盖层厚度越小，坡脚及其附近土体的反应加速度越大的特征。

This method computed the best rank-k approximation matrix which captured the k most prominent features of the data by minimizing the residual error among all rank-k matrices and then used the feature matrices to produce the prediction of unrated items.

本文通过奇异值分解的方法对用户评分矩阵进行降维，搜索最佳的用户特征矩阵和项特征矩阵，使其能有效地反映原始评分数据的特征，并在此基础上利用特征矩阵进行用户评分预测。

According to the different face representation mode, there are four identifying methods. They are the mode identifying method based on geometry feature vector, the feature vector identifying method based on algebra feature vector, the facial feature extraction method based on NN and design method of sorter.

根据表征方式的不同，人脸识别方法有：基于层次聚类的几何特征矢量模式识别法、基于代数特征矢量的特征矢量识别法、基于神经网络的人脸特征提取和分类器设计法。

Instead of statistical description, a feature subspace with the base of some significant eigen vector extracted from covariance matrix is constructed to describe speech feature distribution of speaker. Distance metrics for measuring distance between input feature vector and subspace are also proposed for pattern matching.

说话人语音训练样本提取特征后在语音特征观察空间形成具有一定散度的分布，根据主元分析原理和分布散度提取主要散度本征向量作为基底构成说话人语音特征子空间，并通过测试语音特征矢量与子空间的距离测度进行模式匹配。

Animal's welfare can be feed back from their vocalism. We had some experiments to get 35 days old chicken's vocalization in different environment, including normal environment、 light off environment and people's disturbing environment. On the base of Mel Frequency Cepstral Coefficient, We introduction a new algorithm for feature extraction---Subband Mel Spectrum Centroid. We used support vector machine classification model to evaluate the performance of using different sound parameters.

本文通过研究35日龄海兰褐蛋鸡在正常状态、光照与人为干扰等应激下发声信息的变化特征，提出基于子带梅尔频谱质心的优化特征参数，并通过建立支持向量机模型，比较了采用优化特征参数与梅尔频标倒谱系数及其一阶、二阶导数组成的特征参数（MFCC_39）在识别不同应激中的应用效果。

The sandy desertified lands have the tropical coastal dene c haracteristics in the district, the shape, the xerophyte and the rapid evolvemen t of land use.

海南岛西部沙漠化土地具有热带海岸沙地的地域特征、形态特征、旱生植被景观特征和土地利用快速演变特征。

In order to reveal the spatial disciplinarian and the driving mechanism of urban land expansion, this paper applies the integrated method of remote sensing and geographic information systems to examine the dynamic changes, spatial patterns, traffic locations, barycenter migrations, allometric growth and driving mechanism of urban land expansion in Beijing.

为了揭示北京市城市用地扩张与城市化的空间推进规律及其驱动机理，本文采用RS和GIS综合集成的研究方法，探讨了北京市城市用地空间扩张的动态变化特征、交通区位特征、重心迁移特征和异速增长特征，并对城市空间扩张的机理进行了分析。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。