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solar energy efficiency
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  光能利用效率
     The Distribution Characteristics of Solar Energy Efficiency of Cereal Crops in Inner Mongolia
     内蒙古粮食作物对光能利用效率的分布特点
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  “solar energy efficiency”译为未确定词的双语例句
     Stem-leaf Ecosystem of Spring Wheat and Solar Energy Efficiency in all Film-mulched Condition
     全幅播种条件下春小麦的茎叶生态系统与光能利用
短句来源
     The stem-leaf ecosystem of spring wheat and solar energy efficiency were studied in all film-mulched condition.
     在全幅播种条件下 ,对小麦的茎叶生态系统和光能利用进行了研究。
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  相似匹配句对
     Desalination with Solar Energy
     太阳能海水淡化技术
短句来源
     Solar—hydrogen energy
     太阳——氢能技术
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     The energy of the N-
     N粒子的散射态和束缚态的能量分别为
短句来源
     The energy of D.
     根部能量的积累随放牧强度的提高而逐渐减少。
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     On efficiency of R&D
     关于科研开发效率的思考
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  solar energy efficiency
A 4% solar energy efficiency has been achieved for photogeneration of dihydrogen (H2) using MoS42- as catalyst, when the anode compartment of a photogalvanic cell is illuminated.
      
To be competitive, solar cell costs must be significantly reduced and solar energy efficiency increased.
      


n the farmaland system along Yellow River banks of Baiyin city,which consists of wheat,wheat-soybean, maize,maize-broad bean,wheat-maize,pea-soybean or hyacinth bean-millet,high-lift irrigation gives a high ecological efficiency. The biological, equivalent,crude protein and grain yields are 1.78 ×10 ̄4,1529 and 7077 kg. ha ̄(-1),respectively. 85.7%of dry matters are harvested,and only 14.2%of them are returned back to soil system. The total average input of energy is 1.17×10 ̄(11)J. ha ̄(-1), of which, 81.2%comes...

n the farmaland system along Yellow River banks of Baiyin city,which consists of wheat,wheat-soybean, maize,maize-broad bean,wheat-maize,pea-soybean or hyacinth bean-millet,high-lift irrigation gives a high ecological efficiency. The biological, equivalent,crude protein and grain yields are 1.78 ×10 ̄4,1529 and 7077 kg. ha ̄(-1),respectively. 85.7%of dry matters are harvested,and only 14.2%of them are returned back to soil system. The total average input of energy is 1.17×10 ̄(11)J. ha ̄(-1), of which, 81.2%comes from in- organic. The output-input ratio of energy is respectively 1.53 and 0.66 and average solar energy efficiency is 0. 81%aM0.35%for biomass and grain. As for the economic benefits, the output-input ratio is 2.72 and 1.23 yuan. yuan ̄(-1) for net output and net income, respectively.

白银市沿黄高扬程新灌区粮田生态效能的研究芦满济,秦亚南,李大祥,王东晖(甘肃省农科院土肥所,兰州730070)EcologicalEfficiencyofHigh-LiftIrrigatedFarmlandalongYellowRiverBankso...

By means of Remote Sensing, the estimation of biomass and NPP mainly is on the basis of the models of solar energy efficiency. The biomass and NPP can be calculated through the relation among NPP, APAR and the rate (ε) of which transform APAR to the organic matter. The model is:NPP=(FPAR×PAR)×[ε *×σ T×σ E×σ S×(1-Y m)×(1-Y g)] On the basis of RS and GIS, the net primary production of terrestrial vegetation of China in every ten days using the NOAA AVHRR data with five channels and 8km×8km resolution...

By means of Remote Sensing, the estimation of biomass and NPP mainly is on the basis of the models of solar energy efficiency. The biomass and NPP can be calculated through the relation among NPP, APAR and the rate (ε) of which transform APAR to the organic matter. The model is:NPP=(FPAR×PAR)×[ε *×σ T×σ E×σ S×(1-Y m)×(1-Y g)] On the basis of RS and GIS, the net primary production of terrestrial vegetation of China in every ten days using the NOAA AVHRR data with five channels and 8km×8km resolution cell was calculated. And then the annual NPP was accumulated. The result shows the total NPP of terrestrial vegetation of China is 6.13×10 9t/a in 1990 and the maximum NPP is 1812.9 gC/m 2. According to this result, the spatial distribution of NPP shows a decreasing trend from south-east China to north-west China. The distribution may have close relationship with the distribution of vegetation. The NPP varies with the different vegetation. It is indicated that the NPP of conifer, broadleaf, shrubbery, grassland, meadow/morass, desert, and corn are 1031.92 gC/m 2, 1023.60 gC/m 2, 822.99 gC/m 2, 502.10 gC/m 2, 690.86 gC/m 2, 132.21 gC/m 2 and 891.18 gC/m 2 respectively. According to the yearly NPP, the NPP of shrubbery is 1621.07×10 6 tCa -1 accounting for the largest part of China (26.4%). The sequences of the other vegetation types are forest and corn, grassland, meadow and desert. The yearly NPP of them are 1490.28×10 6tCa -1(24.3%),1485.54×10 6tCa -1 (24.2%),722.83×10 6tCa -1 (11.8%),566.13×10 6tCa -1 (9.2%) and 216.13×10 6tCa -1 (3.52%) respectively. The NPP of different land use types shows that the NPP of forest, agriculture land, grassland, water area, inhabitant area, wasteland and hard-using land are 966.08 gC/m 2,897.15 gC/m 2,545.92 gC/m 2,656.28 gC/m 2,550.46 gC/m 2,299.74 gC/m 2 and 106.56 gC/m 2. According to the yearly NPP, the NPP of forest is 2096.87×10 6tCa -1 accounting for the largest part of China (34.2%). The sequences of the other vegetation types are grassland, agriculture land, wasteland, hard-using land, water area and inhabitant area. The yearly NPP of them are 1911.41×10 6tCa -1 (31.2%), 1760.57×10 6tCa -1 (28.7%), 193.96×10 6tCa -1, 125.92×10 6tCa -1, 51.62×10 6tCa -1 and 3.84×10 6tCa -1 respectively.

植被净第一性生产力 (NPP)研究方法很多 ,运用NOAAAVHRR的可见光、近红外和热红外波段来提取和反演地面参数 ,进而准确估算陆地植被净第一性生产力 ,是一种全新的研究手段。利用遥感数据进行生物量和净第一性生产力的估算 ,主要是采用光能利用率模型 ,即通过NPP与植物吸收的光合有效辐射 (A PAR)和植被将所吸收的光合有效辐射转化为有机物的转化率 (ε)的关系来实现的。用数学公式可表达为 :NPP =(FPAR×PAR)× [ε ×σT×σE×σS× (1-Ym)× (1-Yg) ]在遥感和地理信息系统技术的支持下 ,以 1990年每旬的 8km分辨率的NOAAAVHRR 1— 5通道的影像为数据源 ,对中国每旬的陆地植被净第一性生产力进行估算 ,然后累加得出全年的NPP值。估算结果 :1990年我国陆地植被NPP总量为 6 13× 10 9t/a ,NPP最高值为 1812 9gC/m2 。就计算结果 ,对中国大陆植被NPP的分布规律进行了分析。遥感模型能够以面代点 ,比较真实地反映陆地植被NPP的时空分布状况 ,与我国植被分布的地理规律性相符 ,这是其它统计模型所无法比拟的

Based on the calculation of solar radiation and grain yield data in recent 10 years(19912000),this paper analyzed the regional distribution characteristics of solar energy efficiency (as SEUE) of main grain crops in 29 agrocounties selected as represent stations in Inner Mongolia.All average utilization efficiencies of main cereal crops are higher in the eastern part of Inner Mongolia than that in the centralwestern region,On whole view,maize has the highest utilization efficiency,the next is...

Based on the calculation of solar radiation and grain yield data in recent 10 years(19912000),this paper analyzed the regional distribution characteristics of solar energy efficiency (as SEUE) of main grain crops in 29 agrocounties selected as represent stations in Inner Mongolia.All average utilization efficiencies of main cereal crops are higher in the eastern part of Inner Mongolia than that in the centralwestern region,On whole view,maize has the highest utilization efficiency,the next is spring wheat,and then,cereal crops and millet.

采用近10年内蒙古地区太阳辐射及主要粮食作物产量数据,计算了光能利用效率,并归纳了其区域分布特点:主要粮食作物平均光能利用率东部均高于中、西部,从总体上看,玉米的光能利用率最高,其次是小麦,再次是谷子和整个粮食作物平均值。

 
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