查询词典 spectral analysis

The best training samples are searched and selected on the whole image by the local space information and spectral matching, and then they are purified on spectral domains.

利用影像的空间信息在图像局部范围内自动搜索和选择最佳样区位置，再用光谱匹配对寻找到的最佳样区在光谱空间上进一步纯化。

In combination of rough set theory and the distribution information of the land cover spectral feature space,a spectral feature neighborhood based tolerant rough set classification method is proposed to handle the uncertainty in the process of satellite remote sensing data classification.

结合粗糙集理论和遥感数据中地物光谱特征空间分布信息，提出了一种基于光谱特征邻域的容差粗糙集分类方法，用来处理卫星遥感数据分类中的不确定性问题。

Through analyzing the influence of the learning samples' location in the spectral space on the accuracy of multi spectral remote sensing image classification using BP neural network, a method for learning samples selection based on x 2 distribution was presented and used in TM image classification.

通过分析多光谱遥感图像学习样本在光谱空间不同位置对BP神经网络分类器分类精度的影响，提出基于x2 分布的学习样本选取方法，并应用于TM 图像分类。

By taking a plan grating as a beam splitter and a spherical mirror as an imaging objective,the splitting system realizes a spectral plane and a small spectral band(＜42%),which is conductive to the signal receiving by a CCD detector.

分光系统采用平面光栅为分光元件，球面反射镜为成像物镜，实现了平谱面和较小的谱线弯曲(＜42%)，利于CCD探测器接收。

Spectral efficiency equations are derived for both systems with and without channel prediction. Numerical results show that systems with channel prediction can get maximum spectral efficiency while systems without channel prediction but chosen optimum packet length can get suboptimum frequency efficiency, which is inversely proportional to Doppler frequency.

推导了信道预测和没有信道预测的自适应调制系统的频谱效率公式，分析结果表明对于自适应调制系统，信道预测的系统频谱效率是最优的，非信道预测系统根据信道情况选择最优帧长可以获得该系统的最优系统频谱效率，但它是低于信道预测的频谱效率的，而且是随多普勒频率的增大而逐渐减小的。

Laser Raman spectral technique is an important section in modern laser spectral techniques. Laser Raman spectrum plays an important role on the aspects of analyzing molecular structure, symmetry properties of crystal, investigating solid structure phase-variation and the structure of IR spectrum of molecule. In recent years,it has been extensively applied in many research fields such as organic and inorganic analytical chemistry, biochemistry, petrochemical industry, macromolecule chemistry ,etc.

激光喇曼光谱技术是现代激光光谱技术中的一个重要组成部分，激光喇曼光谱对于确定分子结构和晶体的对称性、研究各种固体结构相变及红外光谱结构分析等方面具有重要作用，近些年来已经广泛地应用于有机和无机分析化学、生物化学、石油化工、高分子化学等领域。

Burg maximum entropy spectral estimation theory of modern spectral estimation is introduced in this paper, and the PSD is simulated by VC ++.

介绍了现代功率谱估计中的Burg算法最大熵谱估计的基本原理，并采用VC++语言对功率谱密度进行了仿真。

Aiming at the uniform features of acceleration response spectra, two scalar periods-the response spectral predominant period T and the smoothed spectral predominant period T are employed to normalize the abscissa of the normalized response spectra of ground motions, respectively.

为了考察地震动加速度反应谱的统一性，用2种标定周期（反应谱卓越周期T和平滑化反应谱卓越周期T）分别对传统规准反应谱的横坐标进行规准化。

Their chemical structures were characterizd on the basis of spectral and chemical evidences to be: Sarracenin (1), 2-methyl-5-hydroxy-7-O-ethyl caffeate chromome (2), Naringenin(3), 2-methyl-5, 7-dihydroxychromome (4), 2-methyl-6-hydroxyl-cinnamic acid methyl ester (5), eriodictyol (6), quercetin (7), Naringenin-7-O-β-D-glucoside( 8 ), eriodictyol-7-O-α-D-glucoside (9), quercetin-3-O-β-D-glucoside(10). In addition, one compound was abtained from the n-butanol frationk, which was finally identified as Morrosiside(11) by spectral and chemical evidences.

以波谱数据及其理化性质鉴定为：Sarracenin(1)，2-甲基-5-羟基-7-O-咖啡酸乙酯色原酮(2)，柚皮素(3)，2-甲基-5，7-二羟基色原酮(4)，2-甲基-6-羟基苯丙烯酸甲酯(5)，圣草酚(6)，槲皮素(7)，柚皮素-7-O-β-D-葡萄糖苷(Naringenin-7-O-β-D-glucoside)(8)，圣草酚-7-O-α-D-葡萄糖苷(eriodictyol-7-O-α-D-glucoside)(9)，槲皮素-3-O-β-D-葡萄糖苷(quercetin--3-O-β-D-glucoside)(10)；另外从正丁醇萃取部位分离得到1个化合物，以波谱数据和文献对照鉴定为：Morroniside(11)。

In order to analyze experimentally the back-scattering micro-spectrum difference between human normal stomach epithetic cell and the cancerous cell to provide optical technique for clinical checking,a micro-spectral measurement setup for checking cell was established based on fiber confocal microscopically imaging technique combined with cell light scattering theory. It could provide micro-imaging and micro-medical spectral information simultaneously.

为了在实验上分析人正常胃上皮细胞与癌变细胞的显微后向散射光谱的区别，为临床医学检测提供实验依据，在光纤共聚焦显微成像技术基础上，结合细胞散射理论，建立了一套基于光纤共聚焦的细胞检测显微光谱分析装置，能够同时获取细胞显微图像和显微光谱医学信息。

Warden: That's a beautiful dog, but don't bring her again.

那是条漂亮的狗，但是不要再把她带来了。

You get up in the morning – no hangover!

你第二天早上起来的时候—不会宿醉！