spectrum band meaning in English
光谱带
Examples
- First , the apparatus of spectral irradiance calibration is set up , and ultraviolet spectrum band uses a standard lamp offered by standard metrological institute of china , while vacuum ultraviolet spectrum uses a deuterium transfer lamp
地面辐射定标分为光谱辐照度定标和光谱辐亮度定标。光谱辐照度定标中选用了卤钨灯作为250nm 400nm标准光源，氘灯作为200nm 300nm的传递光源。 - The method using wavelet packet analysis is proposed to extract fault information from vibration signal obtained from testing jig of tilting train . the vector comprised of the energy of signal in all spectrum bands is input to a feed forward neural network
利用小波包分析，将摆式车体试验台上采集到的振动加速度信号分解在相互独立的频带之p内，各频带内的能量值形成一个向量，将其作为神经网络的输入特征向量， 。 - Hyperspectral images consist of one - dimension spectrum and two - dimension space information . they are wildly used in resource exploration , environmental inspection , military detection , geographic prospecting , and so forth . besides the properties of common remote sensing images , the much greater number of spectrum bands and the higher spectrum resolution are the unique , hence the larger data quantity
高光谱图像包含一维光谱信息和二维空间信息，在资源探测、环境监视、军事侦察、地质勘探等众多领域得到了广泛应用，除了具有一般遥感图像的特征同时，它的波段数目更多，光谱分辨率更高，因而其数据量更为庞大。 - Because of the affection of noise and signal fading , in order to high data rate access and high quality , wireless communication need new technology to improve the link reliability and enhance the spectrum efficiency . mimo ( multiple input and multiple output ) can enhance the spectrum efficiency and increase channel capacity greatly , and reduce the multipath affection without spectrum band and power increasing . the 3th generation mobile communication wcdma is coming , with the purpose of putting mimo , stbc ( space time block coding ) , space diversity into practice of wcdma systems , in order to lay the foundation of 3g toward 4g , this dissertation has done some research under this background
在发射机和接收机使用多个天线进行数据传输的多输入多输出( mimo )技术,可以在不增加带宽和天线发送功率的条件下,成倍的提高频谱利用率,提高系统的信道容量,还可以抗多径干扰。第三代移动通信wcdma即将到来,为了将多天线技术( mimo ) ,空间分集技术,空时编码技术用到wcdma系统中去,为第三代移动通信向第四代移动通信系统平稳过渡奠定一定的基础,需要做一些理论上的研究。 - Investigation using remote sensing ( rs ) technology can breakthrough the limits of traditional methods , make full use of its capability of integration , visualization , rapidity and vast - dimensions analysis , and get better results the paper takes the up - to - date landsat - 7 etm + data , which is the most widely used , and quickbird data , which has the highest resolution nowadays , and according the features of the data and landslides , processes the quickbird data with 1 : 10 000 dem orthophoto correction and the landsat - 7 etm + data as follows : ( 1 ) selecting optimal spectrum band : selects 753 bands as the optimal bands ; ( 2 ) image intensifying : selects the principle components processing method on the basis of comparing several image intensifying methods ; ( 3 ) rigour geometric direction : corrects the geometric distortion of the map ; ( 4 ) image fusion : mainly takes his space transform fusion and resolution fusion method , and acquires maps with higher spectrum resolution as well as space resolution . after that , the visual effect of the image has been enhanced , and the interpretation precision
采用遥感技术，可以突破传统调查方法的限制，发挥其宏观、综合、直观、快速的特点，取得更好的效果。论文选取目前应用最广的陆地卫星最新系列landsat - 7etm +数据和空间分辨率最高的商业卫星quickbird数据作为主要的数据源，根据数据的特点及滑坡灾害应用特征，对quickbird遥感数据则基于1 ： 10000dem进行了正射校正，对etm +遥感数据进行了波段优选，选取了753作为最佳组合波段；图像增强，通过各种增强处理方法的效果对比，选择主成分分析法对图像进行增强；几何精校正，纠正图像的几何变形；影像融合，主要选取了效果较好的his空间变换融合和分辨率融合，得到的图像既具有较高的光谱分辨率，同时也具有较高的空间分辨率。经过上述数字处理，较好地改善了图像的视觉效果，提高了图像解译的精度。