查询词典 spectrum analysis

The structure of the polymer was determined by infrared spectrum analysis and differential scanning calorimeter.

随着人们对环保要求和使用性能的日益提高，开发环保且使用性能佳的丙烯酸酯胶粘剂成为目前的热门课题。

The spectrum analysis method is being applied to more and more aspects of biomedical signal processing, because it has the advantage of reducing computation complexity, easy of feature extraction and data compression. One of its application is the development of frequency domain correlative cardiograph, which has already been applied to clinic.

由于频域分析具有简化计算、便于特征提取和易进行数据压缩等优点，这种方法在生物医学信号处理中得到了越来越广泛的应用，如在心电图的自动分析方面，目前已有频域心电图仪应用于临床。

Aiming at the project request, the paper firstly introduces the theory of Frequency Hopping Communication, the theory of sampling and the principle of spectrum analysis using discrete Fourier transform, then combined with the characteristic and superiority of FPGA designs a channelizing detection method for the carrier frequency in Ultrashort Frequency Hopping signal based on FPGA.

然后结合现代可编程器件FPGA的特点与优势，设计了一种基于FPGA技术的信道化电子侦察方案。

This chelate structure is identified by the atom-emission spectrum analysis.

通过原子发射光谱分析证实了此螯和物的存在。

To reduce the evil influence of the window effect to discrete Fourier transform spectrum analysis, interpolation equations of generalized cosine window function with different K are derived.

为了减少加窗效应对基于离散傅里叶变换频谱分析的测频算法产生的不良影响，推导了不同K值下，广义余弦类窗函数的频谱及幅度比值法插值校正公式。

The conformation of sericin was studied by circular dichroism and infrared spectrum analysis.

研究结果表明，低温乙醇沉淀法是一种简便有效提取丝胶的方法。

A new detection of telegraphic signal in short-wave channel is presented. It is based on the discrete Gabor spectrum analysis.

针对电报用单频信号的持续时长来携带报文信息及短波信道易于受到噪声污染的特点，研究了短波电报信号的离散Gabor谱检测方法。

Except this, we found that the average results of structure under three earthquake waves are dower with the results of spectrum analysis.

在对结构进行弹性动力时程分析时，结构在人工波作用下的反应要大于实际波，且三条地震波作用下的平均值与谱分析结论相吻合。

Spectrum analysis and Total Harmonic Distortion of output voltage and electromotive force of generator are also achieved.

发电机电动势及输出电压的谐波分析、频谱分析和总谐波歧变率分析。

After the mathematic model of spatial spectrum analysis was introduced, interharmonic signals can be transformed to spatial signals received by linear sensor array through Euler\'s formula or Hilbert transform. The number of sinusoidal components of the interharmonic parametric model was corresponding to the source number of transformed spatial signals, and the frequencies of sinusoidal components were corresponding to that of transformed spatial signals.

3介绍了空间谱分析的数学模型，证明了间谐波信号经欧拉公式或希尔伯特变换后可以转变为空间线性阵列接收的空域信号，正弦成分数对应空域信号源数，正弦成分频率对应空域信号频率。

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。