spectrum n. (pl. -tra ) 1.【物理学】谱,光谱;波谱;能谱,质谱。 2.【无线电】射频频谱;无线电(信号)频谱。 3.【心理学】(眼睛的)余像;残像。 4.〔转义〕范围,幅度;(连续的)系列。 an absorption spectrum 吸收(光)谱。 a bright line spectrum 线状光谱。 an optical spectrum 光谱。 a solar spectrum 太阳光谱。 a wide spectrum of opinion 意见的不同幅度甚大。
density n. 1.稠密;浓厚。 2.【物理学】浓度;密度;比重。 3.愚钝,昏庸。 traffic density 交通量。 the density of population 人口密度。
The formula based on spectrum density is given 推导出基于图像频谱密度的响应公式。
Phase noise power spectrum density 相位躁声功率频密度
Power spectrum density 功率谱密度
Object ' s through signature simulation based on power spectrum density estimation 基于功率谱估计的舰船噪声特征提取及声场通过特性仿真
Analysis of evolutionary power spectra density function of ground motion induced by blasting seismic 爆破地震地面运动的演变功率谱密度函数分析
For the next , it studies the theory of auto - cross spectrum density method and stochastic subspace identification method 其次,研究了自互谱法和随机子空间法的理论。
In the end of this chapter , the power spectrum density ( psd ) analysis of hrg is given , which shows that the main noise of hrg is low frequency noise 论文还对陀螺信号进行了功率谱密度分析,分析结果表明陀螺的主要误差都集中在低频段。
At last , the validity and the superiority of boundary - spectrum are improved by contrasting with power spectrum density ( psd ) to analyze tested data 同时通过实验信号的局域波边界谱和功率谱分析比较,突出了局域波边界谱分析的可行性和优点。
Aiming at the common problems about the incline of biochip image , the automatic image rotation correction is realized by analyzing the power spectrum density of image projection 针对生物芯片扫描图象普遍存在的倾斜问题,利用图象投影的能量谱密度,实现对倾斜图象的自动校正。
On the basis of this solution , this paper gives the sound pressure spectrum densities of broad band and harmonic sources , and then discusses the characteristics of these sound fields respectively in detail 在此解基础上,本文得到宽频源和简谐源的近场声压谱密度,指出此2种声源近声场各自的特点及源的旋转半径和轴向位置对声场结构的影响。