查询词典 comparison spectrum

Two different models of Power Spectrum, namely Kanai-Tajimi spectrum and its modified spectrum by Clough and Penzien, are discussed. The latter is more reasonable.

五、讨论了工程上两个常用的功率谱模型，即Kanai-Tajimi谱和Clough-Penzien修正的Kanai-Tajimi谱，说明后者更为合理。

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。

The emission spectrum consisted of continuous spectrum background and discrete spectrum above the background.

等离子体发射光谱呈现连续谱背景迭加分立谱的形式。

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。

Objective:To explore the feasibility of laparoscopy in diagnosing and treating of abdominal diseases.

目的：探讨腹腔镜用以诊断腹部外科疾病及选择治疗方案的可行性。

The lifetime of nylon 1010 and nylon 1010/POSS composites decreased with increasing temperature.

热重-红外联用分析表明尼龙1010在氮气气氛下的降解产物主要为小分子的低聚物，POSS并不改变尼龙1010降解产物的组成。