查询词典 spectrum

Using absorbed value feature of known mineral criterion for reference, utilizing Landsat 7 ETM remote images and features of altered mineral spectrum from USGS, valuable alteration mineralization information are extracted by comparison of spectrum similarity.

利用该区域的Landsat7 ETM遥感影像和标准光谱库中的特征蚀变矿物光谱为基本数据，借鉴已知矿物标准中的吸收谷特征，应用光谱特征匹配技术进行吸收谷谱区间和吸收谷深度对比，通过比较两者的相似性，达到提取蚀度矿物的目的，提取出许多有价值的似蚀变带遥感信息。

H-aggregate structure of MH-PPV conjugated main chains gives rise to the energy splitting of the low exited states, which causes the spectrum of LB films to broaden and blue shift comparison to the UV spectrum of solution, but the bandgap is smaller than that of PPV in casting film.

与MH-PPV溶液的紫外光谱相比，聚合物分子的H-聚集使得LB膜的紫外光谱明显变宽而且最低能量吸收峰发生蓝移，但相对于铸膜其光学能垒有所降低，这是由于共轭主链的有序排列导致最低激发态能级的分裂造成的。

After the study, we get the following results: its power spectrum is a continuous spectrum with pinnacles.

通过研究，我们得到如下结果：胎儿心率的功率谱谱线是具有尖峰结构的连续谱。

Like the visible spectrum, an atomic emission spectrum is a continuous range of colors.

像可见光谱，原子发射光谱是一个持续不断各种颜色。

The experimental results show that plasma emission spectra are composed of atomic spectrum, univalent ion spectrum and continuous radiation.

结果表明：等离子体辐射光谱线由原子光谱线、一价离子光谱线及连续辐射背景光组成。

According to the Poisson equation of gravity-magnetic potential, we derive the relation of cosine transform spectrum between magnetic potential and magnetic field constituent and deduce the cosine transform spectrum formula of n degree derivatives using the cosine transform.

根据重磁位场的泊松公式，利用余弦变换给出磁位与磁场分量间的余弦变换谱关系，推导出磁异常n阶导数的余弦变换谱公式。

It was found that the transmission spectrum of the filter is the cosine function modulated reflection spectrum of the fiber grating.

结果表明该滤波器的透射光谱是余弦函数调制后的光纤光栅反射光谱。

To solve the problem that the-spectrum estimation performance based on covariation under the-stable noise environmentbecomes obviously worse when the distribution parameter is small,a method of fractional low-order covariance spectrum estimation was proposed.

针对在分布参数值较小时稳定分布噪声下基于共变的谱估计性能较差这一问题，提出了一种分数低阶协方差谱估计方法。

School of Electronic and Information Engineering,Dalian University of Technology,Dalian,Liaoning 116024,ChinaStable processes can better model the impulsive random signals and noises in physical observation.This paper briefly describes its spectral representation,proposes a new different spectral density from power spectrum density of second order processes,thus can get a new concept of stable white noise based on covariation spectrum,and a method of identification of nonlinear PAR system based on least p-norm.

描述了稳定分布的谱表示，提出了共变谱密度的概念，得到一种基于自共变序列与共变谱的稳定分布白噪声与有色噪声的概念及其判断标准，对传统意义上的白噪声进行了广义化，依据多项式自回归系统模型，对基于稳定白噪声输入的系统输出非线性稳定有色噪声建立其非线性PAR模型，提出基于最小P范数的EIRLP算法对非线性PAR系统进行辨识。

In the first session the fans vibration on-line monitoring system is realized with VC language, also compile auto power spectrum density function, cross power spectrum density function, autocorrelation function and cross correlation function etc spectral analysis function to carry through simple offline fault diagnosis.

首先用稳定性强、扩展性好的VC++语言开发了通风机振动在线监测系统，并编写了自功率谱密度函数、互功率谱密度函数、自相关函数和互相关函数等频谱分析函数来进行简单的离线故障诊断。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。