查询词典 spectrum analysis

Grain boundary segregations of microelements Sn arc As in U74 heavy-rail steel after austeniized at 1200℃ then cooled at different colling rates were determined by means of Auger electron spectrum and X-ray surface analysis.

用Auger谱仪和X射线面扫描探测了U_(74)重轨钢在加热到1200℃奥氏体化以后再以不同冷速进行冷却的条件下微量元素Sn，As的偏聚情况。

To elucidate the character of FDS-NP, techniques of electron microscopy, analysis of spectrum and collisional quenching of fluorescence were used.

通过电镜检测、光谱分析以及荧光猝灭试验研究了荧光颗粒的特性。

An example for AR prediction and spectrum was given,so as to prove that Matlab is very convenient for time series analysis..Key words: system dentification ; classical identification method

介绍了使用Matlab进行时间序列分析的基本方法和步骤，并通过实例进行了说明。

Research and analysis were carried on frequency spectrum characteristics of loaded coal 's EME during deformation and fracture process.

对受载煤体变形破裂时电磁辐射的频谱特征进行了研究分析，研究结果表明，在受载煤体变形破裂过程中电磁辐射的频带很宽，其主频段随载荷的变化而发生变化，在受载初期，电磁辐射的主频带较低，电磁辐射主频带有时呈现先增高而后降低的趋势；在受载后期，电磁辐射的主频带较高，基本上表现为载荷越大，电磁辐射的主频段越高。

The complex was characterized by elemental analysis, infrared spectrum and thermal gravimetric analyses.

采用元素分析、红外光谱和热重分析对化合物进行了表征。

Analysis of the spectrum obtained by means of homonuclear H,H-correlation spectroscopy revealed a coupling between the methylene group with a chemical shift of 2.08 ppm and the methylene group at 2.42 ppm as well as the proton at 3.76 ppm, as expected for a glutamic acid moiety.

作为独立的肽中一部分的亮氨酸和亮氨酸基之间的区别可以通过将13C 化学位移和从其它单个氨基酸中获得的化学位移进行对比后得出。

Comparative study of the properties of both ground and excited states of metal-free indoline dyes for dyesensitized solar cells revealed: as the number of rhodanine rings increases, the energy difference between HOMO and LUMO decreases and there is a red shift in the absorption spectrum with the binding energy increased, and the transition dipole moment decreased; Based on an analysis of cha...

对比研究吲哚染料的基态和激发态性质，揭示了随着绕丹宁环数目的增加，HOMO和LUMO的能量差减少，吸收光谱红移，但是束缚能增加，跃迁偶极矩减少；依据电荷差分密度，电荷和能量从苯乙烯转移到吲哚环和绕丹宁；电子空穴相干性主要表现在吲哚环和绕丹宁环，对于吲哚染料系统，存在一个绕丹宁环的体系的激子数目为30个原子，带有两个绕丹宁环的体系激子数目有40个原子。

Due to the fact that the intercarrier spacing in OFDM is relatively small, OFDM transceivers are somewhat more sensitive to phase noise compared to single carrier transceivers. Thus this problem must be carefully considered in designing an OFDMbased system since an accurate prediction of the tolerable phase noise can allow designer to relax system specifications. According to spectrum theorem, two components of phase noise were analyzed: common phase error and intercarrier interference. On the basis of the analysis, the performance of OFDM was given for the case where phase noise has been added to the signal, and an optimal design criterion for OFDM parameters was proposed that allows to improve the phase noise error correcting capabilities in OFDM receiver.

由于采用子载波间相互正交的结构，OFDM系统对于由本地振荡器不稳定性所导致的相位噪声影响非常敏感，针对公共相位误差CPE和载波间干扰ICI两种影响表现形式不同的干扰项，从功率谱密度函数这一独特角度分析了相位噪声对OFDM系统性能的影响，提出了旨在提高接收机抵抗相位噪声能力的OFDM系统关键参数优化与设计准则，可在对所设计OFDM系统性能加以提高的同时，有效降低对接收机前端模拟振荡器件和相位噪声抑制单元的性能指标要求，从而降低接收机硬件实现成本。

Objective:To investigate the objective index of traditional Chinese medicine typing by means of analysis bilateral renal interlobar artery blood velocity in diabetic nephropathy patient using colorful Doppler frequency spectrum.

目的：借助彩色多普勒频谱图，对糖尿病肾病患者肾脏叶间动脉血流参数进行分析，探索该病中医分型的客观指标。

Objective:To investigate the objective index of traditional Chinese medicine typing by means of analysis bilateral renal interlobar artery blood velocity in diabetic nephropathy patient using colorful Doppler frequency spectrum. Methods:Thirty-seven diabetic nephropathy patients were divided into two group deficiency of both Qi and Yin .deficiency of both Gan, Shen and Yin.

糖尿病肾病是糖尿病常见的微血管并发症，严重者除大量蛋白尿外，最终将发展为慢性肾功能衰竭，近年通过早期中西医结合治疗，使其总体病情发生及发展得到了一定控制，但该病中医辨症分型尚缺乏客观指标。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。