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有效比辐射率
相关语句
  effective emissivity
     CALCULATION OF EFFECTIVE EMISSIVITY OF DOUBLE CAVITIES BLACKBODY
     双重柱形腔低温面源黑体有效比辐射率的计算
短句来源
     For this reason, this dissertation carry out the following study on component temperature based on ASTER thermal infrared data set:(1) By taking the model of directionality of component effective emissivity and the vice 3-D model of mixed-pixels as foundations, adding variable wavelength X , and treating observing angle 0 as invariable, the model of radiant wavelength variety of non-isothermal mixed-pixels on land surface is defined;
     因此,本文针对ASTER数据,以植被/土壤两相混合像元为研究对象,对地表组分温度的反演方法进行了研究,主要内容有:(1) 以地表组分有效比辐射率方向性模型和“准三维”混合像元模型为依托,通过引入波长变量λ,并视观测角度θ为常量,得到了地表热辐射波长变化模型;
短句来源
     The response time of the blackbody is short and the stability of controlling temperature is good. Temperature range of it is from-20℃ to 300℃ and its effective emissivity is above 0.998.
     该黑体辐射源升温快,控温稳定性好,工作温度范围可达-20~300℃,有效比辐射率大于0.998。
短句来源
     Cloudtop properties include cloudtop pressure, cloudtop temperature and cloud effective emissivity.
     云顶性质包括云顶气压、云顶温度和有效云量或有效比辐射率
短句来源
  “有效比辐射率”译为未确定词的双语例句
     Based on directional law of thermal infrared radiance of non isothermal mixed pixel, the directional model of continuous vegetation has been established and the relationship between the component effective emissivities and variables has been simulated by Monte Carlo method in this paper.
     文中以非同温混合像元热红外辐射方向性规律为基础 ,建立了连续植被类型非同温混合像元热红外辐射模型 ,用蒙特卡罗方法模拟分析了连续植被的组分有效比辐射率与变量的关系。
短句来源
     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. Empirical analytic expressions were used to construct objective function, and genetic algorithm was employed to synchronously retrieve component temperature, soil emissivity and LAI from thermal infrared multi-angle data.
     在连续植被热辐射方向性规律的基础上 ,以喜直型连续植被为例 ,进行了大量的Monte Carlo模拟 ,建立了组分有效比辐射率与土壤表面比辐射率和植被叶面积指数之间的经验函数关系 ,并以此构造目标函数 ,采用遗传算法 ,从热红外多角度数据中 ,同时反演混合像元组分温度和土壤比辐射率以及叶面积指数 .
短句来源
  相似匹配句对
     Chemotherapy was effective.
     化疗有效
短句来源
     Effective teaching
     有效教学
短句来源
     CALCULATION OF EFFECTIVE EMISSIVITY OF DOUBLE CAVITIES BLACKBODY
     双重柱形腔低温面源黑体有效比辐射率的计算
短句来源
     The emittance of the solid is found by combining the experiments with the theoretical analysis.
     由理论分析结果和实验测定的有效辐射,求得材料的比辐射率
短句来源
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  effective emissivity
By using the model of air-oil slick-sea water system, the influence of the oil slick thickness, operating frequency of the radiometer and incidence angle on the effective emissivity are calculated and analysed.
      
Effective emissivity of the endface of a packet of screen-vacuum thermal insulation
      
An analytic expression for the effective emissivity of an SVTI packet is derived with the help of the quasi-diffusion approximation [1] under the assumption that the reflection at the screens is diffusely specular.
      
The effect of the nonisothermal nature of the fluidized bed on the magnitude of the effective emissivity of the bed is taken into account.
      
An effective emissivity of about 0.2 is found to be applicable to the drawing conditions in this paper.
      
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The calculation method of normal effective emissivity of double cavities blackbody at isothermic and unisothermic states is obtained by means of theoretical derivation. The effective emissivity of "Double Cavities High Precision Extended Source Blackbody" used in the infrared radiation calibration of the FY-1 Meteorological Satellite is calculated. The effect of temperature difference on the effective emissivity at unisothermic state is given quantitatively.

通过理论推导,得到了双重柱形黑体腔在等温与非等温状态下法向有效比辐射率的计算方法,对用于〈风云一号〉气象卫星红外定标的双重柱形腔高精度低温面源黑体进行了计算,并就黑体腔的非等温性对有效比辐射率的影响给出了定量的计算结果。

Measurements of radiation components and micrometeorological were carried out in the lower boundary layer at Mizuho station in a period from 1979 to 1980. In this paper, the diurnal and annual variations of radiation components, snow surface albedo, effective emi- ssivity of snow surface and atmosphere, effctive transmittance of atmosphere, and relation-ships of the snow surface albedo with solar elevation angle have been calculated and analyzed. The measured and calculated value of outgoing and incoming Longwave...

Measurements of radiation components and micrometeorological were carried out in the lower boundary layer at Mizuho station in a period from 1979 to 1980. In this paper, the diurnal and annual variations of radiation components, snow surface albedo, effective emi- ssivity of snow surface and atmosphere, effctive transmittance of atmosphere, and relation-ships of the snow surface albedo with solar elevation angle have been calculated and analyzed. The measured and calculated value of outgoing and incoming Longwave radiation was compared. The preliminary results demonstate that: ( 1 ) The annual average value of net radiation was about-14.6WM-3; (2) the snow surface albedo was about 0.79 in the total wavelength region (305-2800nm) of the solar radiation; the snow surface albedo was hig-her than 0.95 in the visible region (305-695nm) and about 0.64 in the near infrared region (695-2800nm) under the clear sky; and the snow surface albedo was dependent on the solar elevation angle, mostly the albedo became high when the solar elevation became low under the clear sky. ( 3 ) the annual average value of effective emissivity of surface and atmosphere were 0.99 and 0.77, respectively. (4) the effective atmosphere transmit-tanee is different for different wavelength region and it was high because of small amount of atmospheric molecules, aerosols and is 0.828 in October 19, 0.871 in December 28, 0.835 in March 3 under the clear sky. (5) the dependence of the outgoing and incoming longwave radiation on the snow surface and atmosphere temperature have good correlation.

本文利用1979—1980年在南极瑞穗站太阳分光辐射分量和长波辐射通量及微气象观测资料,计算并分析了辐射分量,地表反射率,地表和大气的有效比辐射率,大气的有效透过率和雪面反射率与太阳高度角的关系及他们的日,年变化,并对输出输入长波辐射的实测值与计算值进行了比较,初步结果表明:在南极瑞穗站净辐射年平均值为—14.6W/m~2.在波长305—2800nm,305—695nm,和695—2800nm范围内地表反射率分别为0.79,0.95,和0.64.地表和大气有效比辐射率的年平均值分别为0.99和0.77.大气的有效透过率在不同的波长范围内有不同值,代表春,夏,秋季的10月19日,12月28日和3月3日,在305—2800nm波长范围内,晴天大气透过率分别为0.828,0.871和9.835。

For the traditional method of retrieved land surface temperature (LST) using multichannel thermal infrared information, it is very difficult to improve the accuracy of LST because of the high correlation among the channels, furthermore, the component temperature can not be retrieved. Based on directional law of thermal infrared radiance of non isothermal mixed pixel, the directional model of continuous vegetation has been established and the relationship between the component effective emissivities and variables...

For the traditional method of retrieved land surface temperature (LST) using multichannel thermal infrared information, it is very difficult to improve the accuracy of LST because of the high correlation among the channels, furthermore, the component temperature can not be retrieved. Based on directional law of thermal infrared radiance of non isothermal mixed pixel, the directional model of continuous vegetation has been established and the relationship between the component effective emissivities and variables has been simulated by Monte Carlo method in this paper. Results show the thermal infrared radiance of non isothermal continuous vegetation is the function of the component temperatures T v, T s , leaf area index ( LAI ), leaf angle distribution ( LAD ), the single leaf emissivity ε v(θ) and soil surface emissivity ε s(θ) . The variables left to be retrieved are only T v, T s, LAI and ε v(0) . Theoretically, if we take advantage of four data from different viewing angles, the four variables including the component temperatures would be inversed due to the low correlation among the thermal infrared information of different viewing angles. Except the data from the vertical viewing angle, the other three data used for retrieved component temperatures should be limited to a range of 30 to 50 degrees.

利用多通道信息反演陆面温度的传统方法 ,由于通道间信息的高度相关使反演结果的精度难以提高 ,并且无法得到混合像元中的组分温度。文中以非同温混合像元热红外辐射方向性规律为基础 ,建立了连续植被类型非同温混合像元热红外辐射模型 ,用蒙特卡罗方法模拟分析了连续植被的组分有效比辐射率与变量的关系。结果表明 :连续植被热辐射亮度值是组分温度Tv、Ts,叶面积指数 L AI,叶倾角分布 LAD,以及单叶面比辐射率 εv( θ)和土壤表面比辐射率εv( θ)的函数。利用先验知识对变量进行分析后表明 ,6个变量中只有 Tv、Ts、LAI、εv( 0 )需要反演。由于多角度间组分辐射亮度的相关性低 ,从理论上讲只需要 4个角度的辐射亮度观测值就可以解出 4个未知量而达到反演组分温度的目的。这 4个角度数据除选择垂直方向上辐射亮度数据外 ,应在 30°~ 50°视角范围内选择另外 3个热辐射亮度数据。

 
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