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near infrared
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  near infrared
The acousto-optic spectrometer of the near infrared range, which is a part of the spectrometer SPICAM onboard the Mars-Express spacecraft, began to operate in the orbit of Mars in January 2004.
      
The spectral features of leaf reflectance in the visible and near infrared regions are briefly considered.
      
The sole spectral feature in the near infrared, observed at some longitudes, is a possible pyroxene absorption band at 0.95 μm, which can be used to investigate the abundance and distribution of FeO in the regolith.
      
The near infrared is an optimum spectral range for detection.
      
This image clearly exhibits both small-and large-scale structure in the distribution of deviations of the plane of polarization from its theoretical direction for coronal emission in the near infrared (570-800 nm).
      
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This paper discussed the spectrum structure and time profiles of greenness for wheat, corn, soybean and cotton in North-China according to spectral data observed in Yucheng, Shandong provinces in 1981 and 1982. It was proved that primary informations for interpreting the four crops containing in modes of greenness made up of reflectivity of visible region (0.4-0.7μm) and near-infrared region (0.8-1. 1μm). The combination of any band in the visible region does not produce more informations for interpreting...

This paper discussed the spectrum structure and time profiles of greenness for wheat, corn, soybean and cotton in North-China according to spectral data observed in Yucheng, Shandong provinces in 1981 and 1982. It was proved that primary informations for interpreting the four crops containing in modes of greenness made up of reflectivity of visible region (0.4-0.7μm) and near-infrared region (0.8-1. 1μm). The combination of any band in the visible region does not produce more informations for interpreting the four crops, nor does the combination of any band in infrared region. Graphic transformations and time profiles of the greenness which have unique features for four crops were depicted, and their roles in interpretation were shown. We presented three new models of greenness. G6, G7 and G3, with which we can approach cholorophyl contents for wheat, corn and soybean respectively. More informations for interpreting crops can be obtained when the models have been ingeniously combined and rationally used. Different time profiles of greenness will be got when division of band is different. The above mentined charati-cristics 'should be considered in choosing optimum band for resource satellite of China

本文总结了我国黄淮海地区小麦、玉米、大豆、棉花的反射光谱结构和绿度模式。讨论了该四种农作物的变换图形和绿度时间剖面曲线,並指出了它们在遥感作物鉴别中的作用。

The spectral measurments of ground-cover before the flight with an airborne multispectral scanner in Chaidam Basin, Qinghai Province are represented in this paper, in order to provide the basis for selection of best spectral bands of ground-cover identification. The spectral data over 190 samples to be taken in site, such as water, soil, vagetation, rock and salt ect, has been obtained in 1986. The optimun bands for exploration of potass resources have been selected according to the ten spectral bands in the...

The spectral measurments of ground-cover before the flight with an airborne multispectral scanner in Chaidam Basin, Qinghai Province are represented in this paper, in order to provide the basis for selection of best spectral bands of ground-cover identification. The spectral data over 190 samples to be taken in site, such as water, soil, vagetation, rock and salt ect, has been obtained in 1986. The optimun bands for exploration of potass resources have been selected according to the ten spectral bands in the DS-1260 scanner arranging from visible to near-infrared spectrum, with the help of the T-test and sequence-test methods in statistics.

本文叙述了在航空多光谱扫描成像前,首先要在工作区进行地物波谱测试,为多光谱扫描成像取得理想效果、选择最佳波段提供依据。1986年在青海柴达木盆地测得了190多个水、土、植被、岩石与盐类沉积物等地物的波谱数据,经综合整理,按DS-1260②的可见光到近红外10个波段,用数理统计的T检验和秩和检验进行青海柴达木盆地找钾盐航空多光谱遥感最佳波段选择的方法探索。

Recently, the technology, through using remote sensing to classify rock, seek altered belt and to find mine eventually, has developped rapidly. Because vibration of H2O, OH, CO3-2, metal ion and oxide inside rock and mineral yield the great number of sharp and unique spectral absorption features mainly in the region 2.0-2.5 μm, so that research in this aspect is very active. In this paper, the process to obtain and analysis the field spectral data is described using a multiband radiometer which has the same...

Recently, the technology, through using remote sensing to classify rock, seek altered belt and to find mine eventually, has developped rapidly. Because vibration of H2O, OH, CO3-2, metal ion and oxide inside rock and mineral yield the great number of sharp and unique spectral absorption features mainly in the region 2.0-2.5 μm, so that research in this aspect is very active. In this paper, the process to obtain and analysis the field spectral data is described using a multiband radiometer which has the same bands with airbrone multichannel IR scanner used at gold mining areas, oil mining areas, etc in Xinjiang, because the effects of OH, CO3-2 in spectra of rocks is obvious, so that the method is very useful in seek altered belt. The spectra of same rocks in different place are similar. The interfere caused by colour of rock surface in 2.0-2.5 um is less than that in visible-near infrared band. The method also have greater potentiality in seek rocks with Fe+3 and rocks with hydrocabon. It also deal with the classfica-tion results for rocks in a gold mining areas arcording to the material mentioned. By variatesspace transformation the correlation between variates and the numbers of variate have been decreased and the correct rate of classfication has reached 95.3%.

本文介绍使用2.0—2.5微米多通道辐射计,对新疆金矿区、油田及多金属矿区的岩矿所进行的地物光谱采集、整理和分析工作。在岩矿的地物光谱中—OH、CO_3~(-2)的作用相当明显,因此应用该方法对于寻找蚀变带十分有效。不同地区同类岩矿的地物光谱特征相同,受表面色调的干扰比可见—近红外波段要少,故有利于开展光谱工作和区分岩性。通过实验室工作论证,该方法对于Fe~(+3)和微量烃类渗漏也有相当强的探测潜力。文中最后以某矿区岩(矿)为例,介绍岩(矿)分类工作,通过空间变换,减少参量间的相关性和特征参量的维数,分类正确率可达95.3%。

 
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