查询词典 spectrum analysis

The obtained results can be used for the analysis of frequency spectrum for 3D complex group of geometric models.

三角域上的V系统的重要应用显现在对3D复杂几何图组的整体频谱分析上。

These crystal congeries are recognized to be the pyrites through SEM analysis and energy spectrum study.

这些结晶团聚体经扫描电镜、X射线能谱分析，确定为黄铁矿晶体。

On the basis of continuous wavelet transform, a signal analysis method based on extracting the energy spectrum of the signal on wavelet scale was proposed.

通过对连续小波变换的分析研究，提出了一种提取信号在小波尺度上的能量谱的信号分析方法。

Focusing on practical application, finite element simulation technology was discussed for engineering structures applied with combined temperature and vibration environment, including solution of temperature field with convectional boundary condition, thermal stress computation, forming of prestress stiffness matrix, analysis of response power spectrum et al.

从工程应用的角度，探讨温度与随机振动载荷作用下结构动态响应的有限元分析技术，包括对流边界条件下温度场的求解、热应力计算、预应力刚度矩阵的建立、响应功率谱分析等。

This article from the start with the basic signal analysis, the Fourier transform, convolution theorem derivation and feasibility studies, and its use of simulation software MATLAB simulation, to be more intuitive signal of the spectrum changes, simulation discrete signal The system response.

本文就从最基本的信号系统分析入手，对傅里叶变换、卷积定理进行推导和论证，并且运用仿真软件MATLAB对其进行仿真，目的是更直观的研究信号的频谱变化关系，仿真离散信号的系统响应。

A method of time delay estimation by two times spectral analysis, where the time delay is the time interval between peaks of spectrum of the cross power spectral density, is proposed in the paper. It can be used to estimate time delay of not only single target but also multi-target without unwrap.

本文提出了两次谱分析时延估计方法，即将互功率谱函数再次进行谱估计，二次谱峰值位置间距即为时延估计，这种方法既能够估计单目标时延，又能够估计多目标时延，并且不用相位解绕。

The complexes were characterized by elemental analysis, IR spectrum, and single crystal X-ray diffraction.

通过元素分析、红外光谱和X射线单晶衍射方法对配合物进行了表征。

Analysis on the cumulative distribution of probability in capacity for IDMA-OFDM system is performed, and a close representation on system spectrum efficiency of IDMA-OFDM system is obtained, under the assumption of large system regime, when many receive antennas are used.

分析了IDMA—OFDM系统的容量的累积概率分布，在接收天线较多的情况下，以大系统机制假设为前提，推导出一个闭合的IDMA—OFDM系统频谱效率的表达式。

After inspecting the distribution configuration of skin pixels in various color spaces and the spectrum reflection features of human skin, the authors carry out the highlighted are a analysis on a critical two-dimensional plane instead of in a three-dimensional color space, which brings forth certain advantages: computation complexity is deduced, rates between eigenvalues are produced in stepwise PCA to detect automatically the existence of highlighted skin and estimate robustly the skin dichromatic reflection vectors.

通过考察肤色在各种不同彩色空间中的分布形态，以及对皮肤光谱反射特性的分析，采用关键的2维平面代替3维彩色空间进行高光分析。

The properties and structures have been investigated as well by X-ray diffraction, infrared absorption spectrum and differential thermal analysis. The solvent dilatability and gelation ability, viscidity and organic content have been tested.

以十六烷基季铵盐为有机化改性剂，用微波辐射加热的方法制备出了性能优良的有机膨润土，利用XRD、FT-IR、DTA等方法分别对合成的钠基膨润土和有机膨润土的结构进行了研究和表征；并初步测试了有机膨润土的溶胀性、凝胶性能、粘度和有机物含量。

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％。