查询词典 spectrum analysis

In this paper, the effections on time skew estimation with non-ideal test signal are studied using spectrum analysis method, and an algorithm of time skew estimation is presented, the validity of the algorithm is verified by the computer simulation.

本文采用频谱分析方法，研究了非理想测试信号对时间偏差估计的影响，提出了一种新的时间偏差估计算法，通过计算机仿真数据验证了算法的有效性。

With the consideration of the need of frequency spectrum analysis to geometry information, a new method to reconstruct graphic groups in CAGD is proposed with a new class of complete orthogonal functions in L\-2［0,1］(called V-system).

考虑到几何信息频谱分析的需要，采用L\-2［0，1］上一类新的完备正交函数系，针对CAGD中的几何图组，给出一类信息重构方法。

By means of the Singular Spectrum Analysis, We transform the reconstructed space to an orthogonal coordinate and then calculate its correlation dimension.

通过对重构空间引入奇异谱分析，将状态矢量变换到一组正交的坐标系，进而计算其关联维数。

Orthogonal detection can give us both the amplitude information for gray-scale imaging and phase shift information for doppler spectrum analysis.

正交检波方法既能给出灰度超声成像所需要的回波的幅值信息，也能给出多普勒超声成像所需要的回波的相移信息。

With frequency spectrum analysis,the frequencies of four phonation methods were studied in functional GCD patients (150 cases) and normal human (60 cases).

用2031型频谱分析仪检测150例功能性声门闭合不良患者4种发声方式的频率，并与正常男女各30例作对比。

In this study, Chitosan-Poly complex nanoparticles were prepared by template polymerization of acrylic acid in the chitosan solution. The preparation and characterization of CS-PAA nanoparticles including the yields of the nanoparticles, FT-IR spectrum analysis, dynamic light scattering, zeta potential, and morphology of nanoparticles were concentrated in this study. The effects of temperature, weight ratio of CS and PAA, and pH value on the physicochemical properties of nanoparticles were studied.

本研究中，我们以模板聚合法在几丁聚醣（Chitosan， CS）溶液中聚合丙烯酸（Acrylicacid， AA）以制备几丁聚醣－聚丙烯酸复合奈米颗粒并计算其产率，再以傅利叶红外线光谱仪、动态光散射粒径分析仪（Dynamic light scattering， DLS）、表面电位测定仪及穿透式电子显微镜等仪器分析CS－PAA 复合奈米颗粒之性质，以探讨聚合时温度、聚合反应时间、CS 与AA 之重量比，以及介质pH 值对CS－PAA 复合奈米颗粒结构的影响。

Power spectrum analysis is becoming more and more important in both the theory and practice of modern automatic control and relevant fields.

功率谱分析在自动控制的理论和实践中正在变得越来越重要。

Understanding of random signal power spectrum analysis principles and methods.

理解随机信号功率谱分析原理和方法。

A new method of frequency spectrum analysis using Power System Blockset is presented.

给出了利用电力系统模块工具箱对仿真波形进行频谱分析的一种新方法。

The results of the spectrum analysis show that the first wave in the harmonic waves is preponderate in the harmonic waves, the significant areas are North, Northeast, South-west and South of Chain, and the maxium values of amplitude occure in July and August.

对各站每年月雨日序列的波谱分析表明，我国大部分地区年周期的(第1谐波)振动在与其余波动比较中占绝对优势，显著地区是华北、东北、西南及华南地区，振幅最大值出现在7—8月份。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。