特征光谱

A method for the determination of aloin and aloe-emodim in aloe vera was established based on multi-wavelength linear regression spectrophotometry in wavelength range of 350-450nm with a regression equation.

依据芦荟苷与芦荟大黄素的光谱特征，选择350-450nm为测定波长范围，用多波长直线回归分光光度法同时测定芦荟中芦荟苷和芦荟大黄素含量。

According to the principle of the slow frozen and fast melt, the cells suspension were carried out to survive and anabiosis.

结果：1。胃癌细胞的拉曼光谱的特征峰在883、1051、1089、1283cm-1，它们的相对强度改变与细胞内DNA含量、结构改变有关。

These above problems, which are very important and valuable in agricultural crops area monitoring, are currently less researched. Hence, in this paper, seven types of common texture and five vegetation indices were respectively added into TM multispectral bands to classify using three different methods, which are Minimum Distance, Maximum Likelihood and Support Vector Machine, and analyze the effect on winter wheat identification accuracy by comparing the classification results. The contexture include Mean, Variance, Homogeneity, Contrast, Dissimilarity, Entropy, Variance, Angular Second Moment and Correlation, and the vegetation indices are RVI, SAVI, RDVI, NDWI and SLAVI.

为此，该文将平均值、方差、均一性、反差、相异性、熵、角二阶矩、灰度相关7种纹理信息以及比值植被指数、土壤调整植被指数、重归一化植被指数、植被液态水含量指数、有效叶面积植被指数5种植被指数信息分别加入到TM多光谱数据中，同时还进行了最佳波段选择，利用最小距离、最大似然和支持向量机3种方法进行分类提取小麦，研究了不同特征信息对小麦测量精度的影响。

This study aims on the spectral features and sensitive spectrum wave band in the apple florescence.

旨在探索苹果花期的光谱特征和敏感波段。

The Berreman matrix method is applied to determine the transmission and reflection characteristics of birefringent thin films.

采用Berreman特征矩阵方法，通过数值计算研究了双折射薄膜的反射、透射等光谱响应特性。

Experiments show that the method is easy to apply and can reconstruct both bremsstrahlung and characteristic spectra with only a few attenuation data.

实验表明，该方法可利用较少的衰减数据重建包含特征辐射的球管光谱，算法简单易行。

The Surface－enhanced Raman Scattering Spectrum of Cabbage Butterfly PrGV adsorbed on silver surface was obtained and analysed.

通过对菜粉蝶颗粒体病毒病毒粒子的表面增强拉曼散射光谱的分析，得出样品分子在SERS中与银表面相互作用的一些特征。

In IR spectra, several characteristic group have theircorrespondence peaks arranging from 4000〓 to 400〓.

在红外光谱中，在4000～400〓范围内均有相应基团的各种特征吸收峰。

Such line spectra are characteristic of the elements that emit the radiation.

这样的线状光谱是发射这些辐射的元素的特征。

Some characteristic peaks in Raman spectrum have been pointed out.

简单指出了拉曼光谱中的几个特征峰。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。