After the simulation of the well surrounded by two and three stratums, the two-dimensional spectrum is calculated while the curve of wave slowness changes with the frequency is drawn.
分别计算了井外有两层、三层介质时井内声波传播的二维谱，绘制了时差随频率的变化曲线。
Three-dimensional fluorescence spectrum and ultraviolet absorption spectrum of Bletilla striata extraction drawn by boiling water were reported.
报道了白芨沸水浸取液的三维荧光光谱和紫外吸收光谱。
According to the correlation of TV image, the structure and characteristic of three dimensional spectrum in PAL TV signals is mathematically analyzed.
根据电视图像的相关特性，对PAL信号的三维谱结构及其特征进行了数学分析。
The critical function and critical rules based on the spectrum characteristic selection and the process of spatial dimensional reduction were established.
通过光谱特征选择及空间降维处理，建立了判别函数，确定了判别规则。
Method of two and Three dimensional holo spectrum plotted by MATLAB software is set forth.
并阐述了利用MAT - LAB软件绘制二维全息谱图和三维全息谱图的方法。
The objective of this paper is to study the effects of three dimensional constraints on fatigue crack growth under aircraft spectrum loading.
研究裂纹端部三维应力约束、塑性约束和位移约束等对谱载疲劳裂纹扩展的影响。
In this paper, for solving the parameter problem of two dimensional wave equation, the method of Finite Element and the Pulse Spectrum Technique, i. e. the iterative process are used.
本文针对求解二维波动方程的参数问题，利用有限元方法把波动方程反问题转化为有限元反问题，并利用脉冲谱技术，即一个迭代过程进行求解。
Methods Static isometric loading of the biceps and low back muscle was performed in 14 subjects, using FFT power spectrum and its two dimensional mapping to analyze SEMG signals from these muscles.
方法14名受试者分别参加肱二头肌和腰部脊竖肌等长运动负荷实验，取表面肌电信号进行FF T功率谱及其功率谱二维地形图分析。
An efficient and practical method of wind load simulation. Commonly used in engineering practice using the wind speed spectrum, the use of multi-dimensional self.
提出了一种有效而实用的风荷载模拟方法。利用工程实际中普遍采用的风速谱，采用多维自。
The analysis and research on the statistical method for two-dimensional random load spectrum of vehicle transmission are presented in this paper.
本文对传动系多工况二维随机载荷谱的统计方法进行了分析与研究。
Results the differences of various diseased blood vessels are remarkable among the two-dimensional ultrasonic images, the color doppler? Ow images and frequency spectrum doppler.
结果病变血管在二维超声图像，彩色多普勒血流显像以及频谱多普勒方面差异均有显著性。
Objective:To establish the heart sound database and the colored three dimensional spectrum database of normal persons and patients with heart disease.
目的：建立我国正常人和各类心脏病患者的心音数据库及心音彩色三维图谱库。
The energy spectrum of a particle in one-dimensional power potential well is analyzed and the variation of the spectrum shape with the power is discussed.
分析了一维幂次势阱中粒子的能谱，讨论了能谱形状随幂次变化的规律。
Anderson has shown that the one-dimensional disordered system has a pure point spectrum and all the electronic states are localized.
安德森的研究证明，一维无序系统的电子能谱是纯点谱，即所有的电子态都是局域态。
In this paper, we analyze the BER performance of pilot symbol assisted two-dimensional spread spectrum systems with coherent demodulation in multi-path fading channels.
在多径衰落信道中，本文分析了导引辅助的二维扩频相干解调的误码率性能。
In general, two dimensional dynamic NMR spectrum can be obtained by means of three-pulses experiment.
二维动态nmr谱通常可由三脉冲实验得到。
The characteristics of the 2 dimensional echogram, the color Doppler energy imaging and pulsed 2 wave Doppler ultrasound spectrum were studied.
观察分析其二维声像图、彩色能量图及脉冲多普勒频谱特征。
Through numerical calculation, we get the frequency spectrum of one-dimensional diatomic chain in free and periodic boundary conditions.
通过数值计算，我们得到一维双原子链在自由边界与循环边界条件下的频谱。
The numerical calculation formula, the method and the systematic results of the power spectrum of chaos motion in one-dimensional map are given, and the physical graphs of power spectrum are analysed.
本文给出了一维单峰映象混沌运动功率谱数值计算的公式、方法及系统结果，并对其物理图象进行了分析。
The angular spectrum of spontaneous emission in a wo-dimensional undulator free-electron laser is analyzed theoretically.
本文对二维摆动磁场自由电子激光的自发辐射频谱进行了理论分析，并对分析结果进行了数值计算。
Based on the numerical simulation method, frequency spectrum analysis and structure analysis were conducted for the three dimensional unsteady flow inside the compressor rotor.
通过数值模拟，对一个低压压气机转子的非定常流场进行结构分析和频谱分析。
The current analysis focuses on the performance of BPSK modulation on 2-dimensional spread spectrum system with single-tone jamming.
针对二进制相移键控调制的二维扩频系统，分析了其抗单音干扰的性能。
The influence of Electronic Effect, Three-dimensional Effect and Solvent Effect on Ultraviolet Spectrum;
电子效应，空间效应，溶剂效应对紫外光谱的影响。
Applying the theory of multi dimensional digital signal processing, this paper analyses the 2-dimensional interleaving structure of luminance and chrominance spectrum for the PAL signal.
运用多维数字信号处理理论，分析了PAL信号亮度和色度频谱的二维交错结构。
Applying the theory of multi dimensional digital signal processing, this paper analyses the 2-dimensional interleaving structure of luminance and chrominance spectrum for the PAL signal.
运用多维数字信号处理理论，分析了PAL信号亮度和色度频谱的二维交错结构。
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