种特征

Hard to extract Characters and accessible to light and accouterment are the main difficulties of Face Recognition ...

由于人脸是一种有弹性的局部可变形的非刚性目标，因而对面部特征的提取变得很困难，同时光照、饰物等干扰因素也增加了特征提取的难度，这是人脸识别技术存在的主要难题。。。。

Hard to extract Characters and accessible to light and accouterment are the main difficulties of Face Recognition technology.

由于人脸是一种有弹性的局部可变形的非刚性目标，因而对面部特征的提取变得很困难，同时光照、饰物等干扰因素也增加了特征提取的难度，这是人脸识别技术存在的主要难题。

The main collagens in skin are type I and III. In this research, total collagens were separated from rat skin by enzymatic digest and acetum methods. The collagens were denatured at 60℃ and digested with trypsin. Characteristic peptides typical for collagen type I and III were identified with high performance liquid chromatography/mass spectrometry.

哺乳动物皮肤真皮中胶原蛋白含量约为70%，主要为是I型、III型胶原蛋白，本实验利用稀酸溶解和酶法提取了大鼠皮肤中的总胶原蛋白，将胶原蛋白粗提品在60℃变性后用胰蛋白酶进行降解，液相色谱/质谱联用法分析了两种胶原蛋白的特征多肽，利用特征多肽比较了不同生长期大鼠皮肤中I型和III型胶原蛋白相对含量。

Though the microorganisms capable to metabolic H〓S and CH〓SH respectively are Thiobacillis, their physiological characteristics are different. The former is acidophile, the optimum range of pH for which is 1～4; whereas, the latter is neutrophile.

代谢H〓S和CH〓SH的微生物菌群从形态上均有杆状硫细菌的特征，但两种菌群的生理特征不同，代谢H〓S的硫杆菌属嗜酸性微生物，代谢CH〓SH的硫杆菌属嗜中性微生物。

A kind of automatic calculus method is used for the recognition and extraction of skeleton feature,in which some algorithms are used,such as the actinism amendment,fuzzy inference of feature,and edge detection.

运用感光度修正，特征的模糊推理和图像处理的边缘检测等手段，设计一种自动识别骨龄特征的骨龄计算方法。

A novel direction of arrival and polarization estimation of electromagnetic vector sensors mounted on the airframe is proposed based on biquaternion. The signal processing model for EM-sensor mounted on the airframe is made by biquaternion and then the eigenvalue decomposition of spectral matrix is obtained by means of the EVD of its quaternion adjoint matrix. The memory requirement for data is reduced, and more accurate estimation result is gotten by deducing the stronger orthogonality constraint between the sin- gal and noise subspaces on the field of biquaternion. The performance of the new algorithm is confirmed through numerical examples.

针对机载电磁矢量传感器阵列DOA和极化参数估计问题，提出了一种基于复四元数估计方法，该算法利用四元数建立机载电磁矢量传感器阵列信号处理模型，然后利用四元数联合矩阵的特征分解得到阵列数据相关矩阵的特征分解，一方面使得计算过程中数据的贮存量大大减少，另一方面通过推导得到信号子空间和噪声子空间在四元数域上的正交性从而使DOA和极化参数佑计的精度更高，仿真证实了本算法的有效性。

After feature reduction,based on the hypothesis that time factor has a significant affect on the adoptability of the history cases,a small scale algorithm for case feature weight calculation called TSBMPSA is proposed.

经过特征约简，在假设时间因素对历史案例可采纳程度有显著影响基础上，提出了一种小规模的基于时序的案例特征权重多阶段调整算法。

A mathematical model of dynamic neural networks is built, which is shown to be equivalent to an affine nonlinear control system.

引 言 神经网络系统是在现代神经生物学和神经心理学的研究基础上，模仿人的大脑神经元的结构特征和功能特征而建立起来的一种非线性系统。

Analysing natural beauty feature of posture at another angle of health preserving, one of static posture is San Yuan Zhuang; is embodies a stable and straight tree, people obtained a truth from the long life of trees, they realized that people who want to prolong their life should like trees to make a deep-rooted and standing like an old pine.

从养生的另一个角度看，静止类体势的自然美的特征。一种是体现自然物树的稳固、挺拔，如三元桩等。人们从树的长寿中悟到，人要延年益寿，就要象树一样根深蒂固，体势站立如松，坚固挺拔，使人整体体现出巍然屹立的自然物的美的特征。

As one kind of typical mixed financial product, it has some of the characteristics of the bonds and stocks, its risk and anticipative profit are also in the middle of the two.

它作为一种典型的混合金融产品，兼具了债券、股票期权的某些特征，其风险和预期收益的特征介于债务和股票之间。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！