查询词典 spectrum analysis

A discrete cosine transform algorithm was used to process the joint power spectrum in order to enhance the cross correlator term and eliminate the auto correlator term in the joint power spectrum and improve the discriminability of the system.

利用离散余弦变换算法对联合变换功率谱进行数字处理，增强傅里叶面的互相关项，消除自相关项，提高了系统的识别能力。采用一种新的双参数判别方法对相关信号进行判别，提高了判别的准确度。

The research indicates that:(1) detecting λmax (277nm) can identify Metronidazole Buccal Tablets prepared by Chongqing Medical College;(2) detecting λmax (321nm) and λmin (265nm) can identify Metronidazole Disodium Phosphate for Injection prepared by Chongqing Medical College;(3) detecting tr (6.7min) in HPLC-UV spectrum can identify Ceftriaxone Sodium for Injection prepared by Chongqing Keru Pharmacy Co.;(4) detecting tR (10.2min) 6.7min in HPLC-UV spectrum can identify Clarithromycin Tablets prepared by Harebin Yida Pharmacy Co.;(5) detecting λmax (254nm) can identify Potassium Sodium Dehydroandroan Drographolide Succinate prepared by Hong Kong Yaohen Co..

结果表明：①测定紫外最大吸收波长λ_(max277nm可鉴别重庆医科大学医药研究所制备的甲硝唑口颊片；②测定紫外最大吸收波长λ_(max321nm和最小吸收波长λ_(min265nm可鉴别重庆医科大学医药研究所制备的注射用甲硝唑磷酸二钠；③测定HPLC-UV中的保留时间(t_R6.7min)可鉴别重庆科瑞制药股份有限公司制备的注射用头孢曲松钠；④测定高效液相色谱的保留时间(t_R10.2min)可鉴别哈尔滨伊达制药厂提供的克拉霉素片；⑤测定紫外最大吸收波长(又max254nm)可鉴别香港耀恒公司提供的炎琉宁。

In this article, on the foundation of FM-CDMA system, we mainly do the profound analytical study on the technology of modulation and demodulation, spread spectrum and dispread spectrum and spectral structure of the output system.

本文在提出该系统的基础上，主要对该系统中的调制解调技术、扩频解扩技术和系统输出的频谱结构做了深入的分析研究工作。

Calculate Lyapunov spectrum of series of R-R intervals and R-wave peaks with different physiological and pathological states. On the basis of Lyapunov spectrum, first propose the concept of Rate of Convergency-Divergency which can judge dynamics characters of the heart by both convergency and divergency.

计算了不同生理病理状态下动态心电图中RR间期和R波峰序列的Lyapunov指数谱，并以此为基础首次提出了收敛发散比的概念，它可以从收敛和发散两个方面衡量心脏系统的动力学特征。

The effects of ion doping to light emitting spectrum of phosphors was studied, and the results indicate that when only Ba ion doped, the light emitting spectrum of phosphor will take Einstein shift.

研究Ba2+离子掺杂对荧光粉发射光谱的影响，随着Ba2+离子浓度的增加光谱出现红移。

The results show that the mean particle size of α-Fe2O3 monolayer is about 58 nm. There are characteristic bands at 568, 482 and 386 cm~(-1) in IR spectrum. The absorption of 375 nm in UV-Vis spectrum is the electron transition of ferric and oxygen atom.

结果表明，α-Fe2O3单层膜是由粒径约为58 nm的粒子排布而成，在568、482和386 cm-1处有特征红外吸收峰，在紫外区375 nm处存在明显的吸收，为Fe-O间的电子跃迁，其吸光度值与膜层数间的较好线性关系说明在一定的速度下挂膜，可以将氧化铁溶胶中的纳米粒子较好地转移到基片上。

The absorption spectrum, emission spectrum, and fluorescence lifetime of the solution were measured.

测量了这种溶液体系的吸收谱、荧光谱和荧光寿命。

Have explained why the absob spectrum and CL emission spectrum of ruby similar.

指出并解释了红宝石的吸收谱与阴极荧光谱一致的原因。

An emission spectrum of the fluorescence supporter and an absorption spectrum of the phosphorescence emission molecule overlap partly or completely.

荧光载体的发射光谱与掺杂剂的吸收光谱完全或部分重叠。

CURREY''s Science Fiction and Fantasy Authors: A Bibliography of First Printings of their Fiction (1979), a genuine first-edition bibliography which covered about 200 of the principal genre writers and intensified Reginald''s coverage; and George LOCKE''s remarkably accurate A Spectrum of Fantasy: The Bibliography and Biography of a Collection of Fantastic Literature (1980), which suggested en passant several titles that plausibly supplemented the Reginald Checklist; A Spectrum of Fantasy: Volume 2: Acquisitions to a Collection of Fantastic Literature, 1980-1993 (1994) continues the invaluable enterprise.

柯里所著的《科幻和幻想小说作家：其作品第一次印刷版本的目录》（1979）。作为一本纯正的初版目录，包括了大约200个主要的类型作家，并扩大了雷金纳德著作的覆盖面。乔治。洛克的《幻想小说大系：一个幻想文学收藏的目录与传记》（1980）具有让人惊叹的精确性（以及引人入胜的奇闻趣事），其中似真似假地顺便提到了几个条目补充雷金纳德的目录。《幻想小说大系：第二卷：一个幻想文学收藏的所得，1980-1993》（1994）将这一无价的事业继续下去。

Liapunov—Schmidt method is one of the most important method in the bifurcation theory.

Liapunov—Schmidt方法是分叉理论的最重要方法之一。

Be courteous -- even when people are most discourteous to you .

要有礼貌──即使当別人对你最不礼貌的时候。