查询词典 emissivities

The average sizes, construction and morphology of the particles are characterized by XRD, BET (ASAT2010) and SEM. The infrared emissivities during 8~14 μm wave band of the nanoparticles are measured by IR-1 infrared radiometer.

通过XRD，BET(ASAT2010)比表面仪和TEM表征，研究了粉体的粒度、结构和表面形貌等特征；通过IR-1红外发射率测量仪器刚试了粉体在8~14μm波段的红外发射率。

According to the gap in the field,the effect of mutative skin temperature on objects' millimeter wave radiation temperature is studied. The radiation temperatures of various objects with different skin temperatures are measured by 3 mm DC Dicke radiometer.The result shows the change rules of radiation temperatures of objects with different emissivities are distinct.And the effect is more obvious as the higher emissivity.Based on measured data, temperature variation coefficients of various objects are calculated by the least square method.

针对目标表面温度实时变化引起毫米波辐射变化的规律尚未被研究的现状，使用3 mm直流Dicke式辐射计对不同表面温度条件下的目标辐射温度进行了测量，发现使用不同发射率材料的目标的辐射温度随表面温度变化的规律明显不同，材料发射率越高，目标辐射温度受表面温度的影响越大。

By simulating the natural conditions and building up a database of backscattering coefficient and emissivities using IEM model, it is found that when ratio of rms height and correlation length is in some certain range, the ratio of backscattering coefficient to reflectivity is linear or polynomial with surface roughness.

分析所建立的数据库后，得出在0.2＜均方根高度＜1.7，均方根坡度＜0.2和2.0＜均方根高度＜4.0，0.2＜均方根坡度＜0.4两种情况下后向散射系数与反射率之比与土中国科学院遥感应用研究所博卜学位论文壤粗糙度的关系。

In this paper, taken erectophile type continuous vegetation as an example, we did many Monte-Carlo simulations, and established empirical analytic expressions of component effective emissivities with soil emissivity and leaf area index.

徐希孺(北京大学遥感与地理信息系统研究所，地表过程分析与模拟教育部重点实验室，北京 100871)基金项目：国家&九。五&攀登预选项目，编号：95-预-38和国家重点基础研究发展规划项目，编号：

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。