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林区定位
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  “林区定位”译为未确定词的双语例句
     Study on the stability of hand-held GPS receiver for positioning in forest region
     手持式GPS接收机在林区定位的稳定性研究
短句来源
     2. According to the analysis of positioning experience data, it was concluded that DGPS is can afford to forest land positioning with the allowed accuracy.
     2、通过定位试验数据的分析,得出DGPS可以用于林区定位,能够达到高分辨率遥感定位精度要求。
短句来源
     The long term precipitation characteristic and forest entrapment were studied at Sidalong station,Qilian Mountains.
     通过对祁连山寺大隆林区定位站 1 975— 2 0 0 0年的降水特征与森林对降水的再分配分析 ,建立了祁连山寺大隆林区降水与温度、降水与湿度、林冠截留的关系式。
短句来源
     The study of management system of the forest region has an important meaning on the orientation and development of key state-owned forest districts.
     研究森工林区管理体制问题对于重点国有林区定位和发展具有重要的意义。
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  相似匹配句对
     Video Text Location
     视频文本定位
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     The Orientation of Universities
     大学的定位
短句来源
     Study on the stability of hand-held GPS receiver for positioning in forest region
     手持式GPS接收机在林区定位的稳定性研究
短句来源
     2. Research on DGPS positioning accuracy under the tree canopy in forest land.
     2、DGPS在林区及林冠下的定位精度分析。
短句来源
     Discussin on Investment of Forest Area
     浅析林区投资
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The long term precipitation characteristic and forest entrapment were studied at Sidalong station,Qilian Mountains. The annual average precipitation is 433.6 mm(from 1972 to 2000), and varied from 326.4 mm to 539.7 mm, annual precipitation falls in summer is 65.70%. Precipitation is altered in different altitudes, its tendency increase 4.45% of the amount with altitude arising per 100 m.The average entrapmentrates are 37.5%, 31.7% on canopy entrapping precipitation of Picea crassifolia forest and Sabina...

The long term precipitation characteristic and forest entrapment were studied at Sidalong station,Qilian Mountains. The annual average precipitation is 433.6 mm(from 1972 to 2000), and varied from 326.4 mm to 539.7 mm, annual precipitation falls in summer is 65.70%. Precipitation is altered in different altitudes, its tendency increase 4.45% of the amount with altitude arising per 100 m.The average entrapmentrates are 37.5%, 31.7% on canopy entrapping precipitation of Picea crassifolia forest and Sabina Przewalsskii forest,the average entrapmentrate of brush forest even is as high as 66.5%. When the rainfall is intensive, its average entrapmentrate gradually diminished in Picea Crassifolia forest. When the amount of precipitation is 18.67 mm, the amount of canopy entrapment of Picea Crassifolia forest is 14.72 mm. The trunk runoff of Picea crassifolia is 0.51% of the amount of precipitation and its trunk runoff began when the amount of precipitation is over 12.0 mm. The litter entrapment precipitation gradually increased when amount of rainfall increased, the entrapment rate increased when the amount of rainfall diminished.

通过对祁连山寺大隆林区定位站 1 975— 2 0 0 0年的降水特征与森林对降水的再分配分析 ,建立了祁连山寺大隆林区降水与温度、降水与湿度、林冠截留的关系式。该区多年平均降水量为 433 .5mm ,年变幅在 32 6 .4~ 539.7mm之间 ;降水量最大出现在夏季 ,占全年降水量的 65 .70 % ;海拔高度每升高 1 0 0m ,年降水量平均递增 4 .55 %。林区温度和湿度均与降水有较好的拟合关系。青海云杉林与祁连圆柏林林冠对大气降水的平均截留率分别为 37.5 %、 31 .7% ,灌木林的截留率平均高达 66 .5 %。青海云杉林林冠层平均截留率随着降雨量的增大逐渐减小 ,当降雨量为 1 8.67mm时 ,林冠截留量达到最大 ,为 1 4 .72mm ;青海云杉树干径流量占降水量的 0 .51 % ;当降雨量超过 1 2 .0mm时 ,才开始产生树干径流。青海云杉林枯枝落叶层对降雨的截留量随降雨量级增加而增大 ,截留率则随降雨量减小而增大 ,枯枝落叶层所具有的截留降雨和调蓄降雨作用使祁连山林区基本不发生地表径流。分析结果表明 ,祁连山林区对水源涵养和水流出山的时间调控有重要意...

通过对祁连山寺大隆林区定位站 1 975— 2 0 0 0年的降水特征与森林对降水的再分配分析 ,建立了祁连山寺大隆林区降水与温度、降水与湿度、林冠截留的关系式。该区多年平均降水量为 433 .5mm ,年变幅在 32 6 .4~ 539.7mm之间 ;降水量最大出现在夏季 ,占全年降水量的 65 .70 % ;海拔高度每升高 1 0 0m ,年降水量平均递增 4 .55 %。林区温度和湿度均与降水有较好的拟合关系。青海云杉林与祁连圆柏林林冠对大气降水的平均截留率分别为 37.5 %、 31 .7% ,灌木林的截留率平均高达 66 .5 %。青海云杉林林冠层平均截留率随着降雨量的增大逐渐减小 ,当降雨量为 1 8.67mm时 ,林冠截留量达到最大 ,为 1 4 .72mm ;青海云杉树干径流量占降水量的 0 .51 % ;当降雨量超过 1 2 .0mm时 ,才开始产生树干径流。青海云杉林枯枝落叶层对降雨的截留量随降雨量级增加而增大 ,截留率则随降雨量减小而增大 ,枯枝落叶层所具有的截留降雨和调蓄降雨作用使祁连山林区基本不发生地表径流。分析结果表明 ,祁连山林区对水源涵养和水流出山的时间调控有重要意义。

By using total station and hand-held GPS receiver, a closed traverse is surveyed in coniferous and broadleaved forest. On the basis of the transformation of coordinate observed, the coordinate transformation models are established, and the stability and possible accuracy of hand-held GPS receiver for positioning in forest region are studied.

利用全站仪及手持式卫星定位接收机,在针叶林和阔叶林中测设闭合导线,以测定的导线点数据 坐标为依据,通过坐标转换及对比,从理论上详细探讨了手持式卫星定位接收机在林区定位的稳定性及可能达 到的精度状况。

Position technology has taken important roles in forestry, and the new challenges have presented to us because of the expanse, obstruction and amplitude of forestry fields. In view of the economy and practicality,an effective method of three-dimensional position by two-point resection involves two vertical angles is discussed in this paper. The characteristic is that we set up the instruments on unknown point for once, observe three parameters including two vertical angles and one horizontal angle. It has less...

Position technology has taken important roles in forestry, and the new challenges have presented to us because of the expanse, obstruction and amplitude of forestry fields. In view of the economy and practicality,an effective method of three-dimensional position by two-point resection involves two vertical angles is discussed in this paper. The characteristic is that we set up the instruments on unknown point for once, observe three parameters including two vertical angles and one horizontal angle. It has less measure mental data than common methods, and it can solves the position difficulties of sight line in forestry fields. The mathematical modes have been proved in this paper and the precision has been analysed based on the examples.

定位技术在林业工作中起着重要的作用,同时,由于林地的广阔、闭郁及交通不便等特点又给定位工作提出新的要求。从经济性和实用性出发,本文讨论一种加测倾角的双点后方交会三维定位方法。其主要特点是只在待定点上安置1次仪器,对2个已知点观测3个参数,即2个竖直角和1个水平角。与常用的前方交会、后方交会定位方法相比,其观测数据少,同时,解决了林区定位通视条件差给定位工作带来的困难。对相关三维后方交会的数学模型进行了推证,并根据实例进行了误差分析。

 
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