查询词典 feature

A feature extraction method for palmprint image is proposed,the implementation procedure of this method is as follows:firstly,the 2D Gabor wavelet transform coefficient amplitudes are computed at the equispaced discrete positions on the palmprint image,and they are used as original features of the palmprint image;then,the dimension of the Gabor wavelet feature is reduced by principal component analysis;lastly,the optimal discriminant features that are most advantageous for classification are extracted by linear discriminant analysis.

提出了一种提取掌纹图像特征的方法，该方法的实现过程如下：首先，计算掌纹图像上均布离散位置的二维Gabor小波变换系数的幅值，将其作为掌纹图像的原始特征；其次，利用主分量分析实现Gabor小波特征的降维；最后，通过线性判别分析提取最有利于分类的最佳鉴别特征。

In the Sixth Chapter, the Wavelet analysis method is introduced in discussing some acoustic imaging problems related to the physical background of the ultrasonic detection. In the light of the solution of some theoretical problem in the 2D Wavelet transmission of two components form, the enhancement and identification of the spotty and fibriform faults of the acoutic image, along with two acoustic image deblurring methods based respectively on the acoustic physical feature analysis and the acoustic image's spatial feature analysis of the object, are realized. Therefore the image degeneration problem resulting from the acoustic beam diffusion or the acoustic focus diffusion in the ultrasonic detection are effectively improved. The software for this purpose has also been developed.

第六章首次应用小波分析的方法，研究了与超声检测的物理背景有关的一些声象处理问题，在解决了二分量形式的二维小波变换中的一些理论问题的基础上，建立起了对声象中点状和线状缺陷目标的增强与分离方法，以及分别基于目标的声学物理特征分析和基于目标声象空间特征分析的二种声象弥散消除方法，实验分析结果表明，这种方法较好地解决了超声检测中由于声束截面或声焦点扩散所造成的成象退化问题。

ABSTRACT: The text puts forward some cooperating with development suggestions that established city feature living space and continued city culture based on tring to explain the implication and function of city living space and city context , and by interactive relation both distinguishing analysing seting up the space of city feature habitancy and continuing city context.

从解释城市居住空间和城市文脉的涵义与功能入手，通过辨证分析创建城市特色居住空间和延续城市文脉两者互动关系的基础上，提出实现创建城市特色居住空间和延续城市文脉协同发展的建议。

The details of the research include: By studying the structure of the natural bamboo fiber, make the basic morphological structure and the degree of crystallization clear; By studying the mechanical property of the fiber, make the feature of mechanical property of the natural bamboo fiber clear; By studying the mechanical property of the pure yarn and its blends, make the feature of mechanical property of the yarn clear; and we also study the mechanical property changes of the pure yarn and its blends in the hygrometric state different temperature state and after mercerization and alkali shrinkage.

研究内容包括：通过对天然竹原纤维结构的研究，探明竹原纤维的基本形态特征和结晶度等特征；通过对天然竹原纤维机械性能的研究，探明竹原纤维的力学性能特点；通过对竹原纤维纯纺、混纺纱线力学性能研究，探明其纱线的力学性能特点；研究在湿态条件下，竹原纤维纯纺、混纺纱线力学性能的变化特点；研究在不同温度条件下，竹原纤维纯纺、混纺纱线力学性能的变化特点；研究在丝光、碱缩条件下，竹原纤维纯纺、混纺纱线力学性能的变化特点。

As variety of surface defect types of cold rolled strips,it is very impendent to find a group of optimized feature set among original feature set extracted from surface defects,which can express essence characters of defects more effectively and improve defect recognition rate.

由于冷轧带钢表面缺陷的类型多种多样，在所提取的特征集中，需要寻找出一组较优的特征集，使之可以更有效地表达缺陷的本质特征，从而提高缺陷识别的准确率。

Seismic data in Sudan studied area has following feature:①complex structure and developed faults;②large work area that resulted in reflection events for same horizons being inconsistent to whole area;③irrecognizable seismic feature of target.

苏丹研究区的地震资料具有以下特点：①构造复杂且断层发育；②工区面积大，同一界面反射轴在全区内不统一；③目的层的地震特征不明显。

By using the kernel function, the input space is mapped to a high dimension feature space where the data are expected to be more separable, the initial centroids in the feature space are selected by applying the KRA algorithm, and the large and small clusters are partitioned and the outliers can be split from the large clusters iteratively after the kk-means clustering. As a result, the audit data can be clustered better. Secondly, the closed sequential patterns mining algorithm CloSpan is improved according to the restrictions that is composed of the axis properties and reference properties.

该方法通过核函数把数据样本空间映射到一个高维的特征空间，使数据在新的空间中具有更好的可分离性；在特征空间采用KRA算法选取初始聚类中心，然后在核k-means聚类的基础上，划分出大簇小簇并在大簇中分离出异类再次进行核聚类，从而不断地优化聚类结果。

Based on DEM data of different development periods of a indoor watershed model obtained from the integration of artificial simulated rainfall experiment and high accuracy digital photogrammetry technique, the fractal dimensions of topographic feature under different development periods of the indoor watershed model based on variation method were calculated and the relationships between watershed topographic feature fractal dimension and topographic factors such as watershed gully density as well as ground lacerative degree was discussed preliminarily.

以室内流域模型人工模拟降雨试验和高精度摄影测量获得的模型流域不同发育时段的数字高程模型数据为基础，采用变分法计算了流域地貌形态分形维数，并对分形维数与地貌因子沟谷密度和地面割裂度的关系进行初步探讨。

Methods:X-ray feature of gastrointestinal leiomyosarcoma in 20 cases co nfirmed by operation and pathology, and CT feature of gastric leiomyosarcoma in 11 of 20 cases were analyzed retrospectively.

回顾分析经手术病理证实的20例胃肠道平滑肌肉瘤的X线表现及其中11例胃平滑肌肉瘤的CT表现。

The study shows that the most striking feature about the use of the mandative subjunctive is that the distribution of the mandative subjunctive in MTE is much higher than that in MEE, NEC or T4, and much lower than that in LOBA or BROWNA. Another feature is that the morphological subjunctive, as one of the two variants of the mandative subjunctive, is most favored in MTE.

而在强制性虚拟语气中，原形式强制性虚拟语气在海事条约英语中的分布要高于迂回式强制性虚拟语气，而在其它语料库中，原形式强制性虚拟语气的分布却要低于迂回式强制性虚拟语气。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。