查询词典 emission spectrum

The visible spectrum of Mo in Ti-based alloy was analyzed by a digital spectroscope. Mo 553.31nm and Ti 551.44nm were selected as spectral lines for analysis and comparison. Samples of Ti-based alloys with different Mo contents were analyzed quantitatively. The data indicated that the ratio of intensities between analytical spectrum and comparison spectrum has a positive relationship with the content of Mo.

使用数字化看谱镜对钛合金中钼元素可见光谱进行了分析测定，选用M0553.31nm和Ti551.44nm作为分析谱线和比较谱线，对不同Mo元素含量的钛合金样品进行了定量分析探索，数据显示分析谱线和比较谱线的强度比值与Mo元素含量成正比关系。

Key words: communication technology; cognitive radio; spectrum sensing; cooperative spectrum sensing; continuous spectrum sensing

关键 词：通信技术；认知无线电；频谱感知；协同频谱感知；连续频谱感知

Functions include wave form addition, wave form subtraction, Lissajous Pattern display, transient signal recording, RMSamplitude spectrum display, relative amplitude spectrum display, phase spectrum display, auto correlation coefficient display, cross correlation coefficient display, function generation, and multi-tone generation.

功能包括音形叠加，音形结构，Lissajous Pattern 显示，暂时信号记录，RMS 声谱振幅显示，相关声谱振幅显示，自动相关系数显示，交错相关系数显示，函数生成以及多声音生成。

The feature extraction methods of LOFAR spectrum, envelop spectrum and waveform structure are studied. Based on the study of third order cummulant, the feature extraction method of diagonal slide spectrum is presented.

研究了水下目标辐射噪声信号的LOFAR谱特征、包络谱特征、波形结构特征提取方法，在对三阶累积量的性质进行分析的基础上，提出了三阶累积量对角切片谱特征的提取方法。

Then select the very surfactants\' concentration to treat SBP for one hour, scan on the circular dichromatism spectrum and fluorescent spectrum; ultraviolet-visible spectrum scans SBP\'s variations within 2h after surfactants\' adding to immediately.

实验前加适量相应缓冲液溶解使SBP浓度为250mg/ml.30℃下，设置三种表面活性剂的浓度梯度，使得每种表活剂的加入使得SBP酶活力变化，并在某一特定浓度和特定时间残留酶活力稳定。

The traditional object of electronic and atomic collision studies is a total or differential cross section. People analyse the structure information of target atom through the spectrum, the energy spectrum or the momentum spectrum.

传统的电子原子碰撞实验，主要是通过碰撞截面测量和计算来获取碰撞过程的信息，通过光谱、能谱或动量谱来分析靶结构信息。

The present paper uses the direct sequence spread spectrum technology, key to short-wave communication and direct sequence spread spectrum correspondence characteristic as well as union advantage, wide frequency code production, the direct sequence spread spectrum communications system technology and the principle, the wide frequency synchronization technology, the RAKE receive technology has conducted the research and the analysis.

本论文采用直接序列扩频技术，重点对短波通信与直接序列扩频通信的特点以及结合的优点，扩频码的产生，直接序列扩频通信系统的技术与原理，扩频同步技术，RAKE接收技术进行了研究与分析。

Discrete spectrum existed in power spectrum of output single are weaken and the power spectrum become consecutive because of using randomized modulation.

随机调制技术较好地减小了输出信号中的离散功率谱，使输出信号的功率谱趋于连续。

In order to make the analyzing results of virtual instrument more accurate, the spectrum correcting technology is studied. After analyzing three existing methods for phase difference correcting on discrete spectrum, it is recommended to correct the spectrum by the first phase difference correcting method.

为了使虚拟仪器频谱分析的结果更加准确，论文研究了目前应用广泛的频谱校正技术，并对三种相位差频谱校正技术进行了仿真实验和综合比较，提出了推荐采用的技术。

The analysis of simulation result indicates that the CDMA system has much more superior performance on noise-immune; the continuous processing in the part of signal modulation can not improve the efficiency of spectrum in CDMA system; under the situation , making sure that the proximity of the reliability of information transmission to the unsmoothed system, the power of the transmission can decline to 90.5% of the unsmoothed system, the bandwidth of -50dB will decline to almost one half of the unsmoothed system in spread spectrum and dispread spectrum by using continuous WALSH codes.

仿真及分析结果表明：CDMA系统具有更优越的抗噪声性能；信息调制部分的平滑化处理在CDMA系统中不会改善频谱的利用效率；运用平滑化WALSH码进行扩频和解扩时，在保证信息传输可靠性与非平滑化系统接近的情况下，能够将发射功率降低到非平滑化系统的90.5%，-50dB带宽减小到非平滑化系统的一半左右，这有利于降低对临近频段的干扰，提高频谱的利用效率。

The witness also told the jury at the Royal Courts of Justice in London that he saw a paparazzo fighting with a member of the public who was trying to stop him taking pictures in the minutes before the emergency services arrived.

他还告诉在伦敦皇家法庭的陪审团，在急救服务到来之前，他当时看见一个狗仔队正和一群阻止他拍照的人打架。

The entire N／C program on a tape is made up of an accumulation of these successive data blocks.

纸带上的整个数控程序由这些连续数据单元连接而成。