谱

Extract information based on the instantaneous features : In the center is one of the instantaneous rate of the power spectral density of the maximum, is a center to the absolute value of the instantaneous rate of the standard deviation, Non-zero weak signal instantaneous phase of the nonlinear component absolute standard deviation, Non-zero weak signal instantaneous phase of the nonlinear component standard deviation, In the center is one of the non-weak signal of the absolute value of the instantaneous frequency standard deviation, a signal to one of the instantaneous frequency of the power spectral density of the maximum, According to 16QAM and QPSK signals XI axis projection in the different performance parameters raised.

提取信号七个基于瞬时信息的特征：零中心归一化瞬时幅度功率谱密度的最大值，零中心归一化瞬时幅度绝对值的标准偏差，零中心非弱信号段瞬时相位非线性分量绝对值标准偏差，零中心非弱信号段瞬时相位非线性分量标准偏差，零中心归一化的非弱信号段瞬时频率绝对值的标准偏差，一个信号段的归一化瞬时频率功率谱密度的最大值，根据信号 QPSK 和16QAM在 XI 轴投影的不同表现，提出特征参数。

The spectra of absorption and refractive index of melamine and cyanuric acid at 0.3-2.5 THz were measured in room temperature by using THz-TDS technology.

方法］采用THZ-TDS技术测量了室温下三聚氰胺和三聚氰酸在0.3~2.5THz的吸收谱和折射率谱。

The formula of the absorption of each spectral line of CO2 laser radiation by atmospheric CO2 are given.

本文给出了大气二氧化碳对CO_2激光辐射各谱线吸收的计算公式，并利用标准大气资料计算了各谱线的吸收值。

The method of high-resolution Fourier-transform spectroscopy study on the Absorption line intensities is discussed. With a series of measurement and fitting the line profiles, altogether 1 760 Absorption lines of phosphine were obtained, corresponding to five bands in the 1 950-2 480 cm~(-1)region and four bands i...

文章探讨了高分辨傅里叶变换光谱方法研究气体样品吸收线型的基本原理，并通过实验测量以及程序拟合谱线线型，得到了磷烷分子在1950~2480cm-1波段的5个吸收带以及3280~3580cm-1波段的4个吸收带中的1760条谱线线强度，经分析其结果误差在±6%左右。

The direct incorporation of U-13C glucose was estimated by the intensity increase of m/z to F(F was parent fragment, and n was the carbon number in the fragment), while the total isotope incorporation from the added 13C could be calculated according to the abundance ratio increment summation from m/z (Fa+1) through (Fa was the fragment containing all original skeleton carbons, and T was the carbon number in the amino acid molecule). The 13C enrichment in the target compound was expressed as atom percentage excess, and that of D-amino acid needed to be corrected by the coefficient of hydrolysis-induced racemization. The 13C enrichment reflected the carbon turnover velocity of individual amino acid enantiomers, and was powerful to investigate the dynamics of soil amino acids.

外加葡萄糖直接合成氨基酸的比例可利用质谱碎片的相对强度变化来评价（n为质谱碎片F中含有的碳原子数目）；而源于葡萄糖的13C同位素在氨基酸分子中的富集程度是所有同位素峰相对强度变化的总和。13C在目标化合物中的富集比例用原子百分超评价，D氨－基酸的APE还需进一步利用水解诱导的外消旋化系数校正。13C在目标化合物中的富集程度可反映各氨基酸手性异构体的碳循环速率大小，是研究土壤氨基酸动态变化的有力工具。

An analytic method was developed for determination of trazine and acetamide herbicides in water based on solid phase extractionand gas chromatography-mass spectrometry.

研究了固相萃取/气相色谱-质谱联用技术测定水样中的12种三嗪类和酰胺类除草剂的方法。

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。

This study aims at the application of ESI-MS and MALDI-MS in the identification of acetylation of mouse liver.

本论文的研究工作旨在考察两类生物质谱技术ESI-MS和MALDI-MS在乙酰化蛋白质翻译后修饰鉴定中的应用及其应用于小鼠肝乙酰化修饰谱的鉴定研究。

In this paper, we evaluated the performance of different quantum chemical methods for calculating 13C chemical shifts of acetylsalicylic acid and its derivatives.

核磁共振的谱峰归属对分子结构的确定至关重要，用理论计算方法预测化学位移对谱峰的正确归属是极其有帮助的。

Electrospray ionization mass spectrometry combined with multipletandem mass spectrometry has been applied for simultaneously determininglipo-alkaloids from the aconite tubers.

把电喷雾质谱和多级串联质谱(〓，n=2-10)结合用以分析附子中脂类生物碱的成分。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。