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land rates
相关语句
  相似匹配句对
     Land Regulation
     土地整理产业化概述
短句来源
     ON LAND CONSOLIDATION
     论土地整理
     The rates of increase of R。
     值增加的速率存在差异,前期R。
短句来源
     Soil Erosion Rates Under Different Land Scale Conditions
     不同尺度域的侵蚀模数
短句来源
     The Dr rates of E.
     coli的耐药性不同 ,尿中E .
短句来源
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The general diagnosis for vulnerability of the urban flood waterlogged disaster in Hunan Province was carried out by analyzing environmental variability, urban location vulnerability, hazard sensitivity of urban socio economic conditions. By means of fuzzy comprehensive evaluation method, the quantitative assessment on vulnerability was made by electing aseries of indexes, such as population density, industry production value density, road network density and urban green land rate. The vulnerability...

The general diagnosis for vulnerability of the urban flood waterlogged disaster in Hunan Province was carried out by analyzing environmental variability, urban location vulnerability, hazard sensitivity of urban socio economic conditions. By means of fuzzy comprehensive evaluation method, the quantitative assessment on vulnerability was made by electing aseries of indexes, such as population density, industry production value density, road network density and urban green land rate. The vulnerability degrees were divided into five grades,and the general vulnerability degree grade (level) of the urban flood waterlogged disaster is high and vulnerability degree grade has not corresponding relationship to the urban scale. The importance of prevention and control for flood waterlogged disaster must be transferred from countryside to city and the countermeasures must be suited to local conditions.

首先从孕育洪涝灾害的环境变异性、社会经济灾敏性、城市土地利用对洪涝的放大作用 ,防洪标准和人为设障等方面对湖南城市洪涝的易损性进行了总体诊断。然后 ,选取人口密度、工业产值密度、道路网密度、排水管道密度、建成区绿地率等指标 ,运用模糊综合评判对之进行了定量评估。将全省城市洪涝的易损性程度划分为 5个等级 :高度易损性、较高度易损性、中度易损性、较低度易损性、低度易损性。研究结果表明 :湖南城市洪涝易损性程度总体水平高 ,因此 ,湖南洪涝防治要从以农村为重点转向以城市为重点 ,加大城市洪涝治理力度 ;湖南城市洪涝易损性程度等级与城市规模之间没有对应关系 ,因此 ,湖南城市洪涝防治应因地制宜

To study desertification processes of sand grassland in semi-arid area, grazing experiment for 5 years was carried out in Horqin Sand Land, Inner Mongolia. The results shown that vegetation height, cover, individual size and root mass reduced sharply when grazing rate of grass was higher 70%, which were 10.1%, 1cm, 2.5cm 3 and 18.7g/m 2 separately at 5th year, and just were 12.0%?3.02%?0.86% and 22.1% of that in the ungrazing plot. At same time, the animal activities and trample action in grassland...

To study desertification processes of sand grassland in semi-arid area, grazing experiment for 5 years was carried out in Horqin Sand Land, Inner Mongolia. The results shown that vegetation height, cover, individual size and root mass reduced sharply when grazing rate of grass was higher 70%, which were 10.1%, 1cm, 2.5cm 3 and 18.7g/m 2 separately at 5th year, and just were 12.0%?3.02%?0.86% and 22.1% of that in the ungrazing plot. At same time, the animal activities and trample action in grassland was increased, hoof print numbers in grassland were 36.4n/m 2 and 8.5n/m 2 sheep, and were 9.6 times and 8.25 times of that in light grazing plot respectively, but soil hardness was 3.75 times of ungrazing plot. As overgrazing continued, small bare spots appeared in grassland while plant height and cover and individual size reduced generally, and the bare spots was increased and enlarged rapidly, and was mutually connected to greaterbare plots. For example, there was 19 bare plots and 73.7% of bare plots was smaller than 2.5m at first year in overgrazing plot, but bare plot number increased to 358, and the rate of >2.5m bare plots and bare land rate increased respectively from 26.3% to 31.3% and from 1.8% to35.8% at third year, which average length of bare plots increased from 2.4m to 4.1m, and the rate of >2.5m bare plotsand bare land rate increased respectively to 45.7% and 51.6% at 5th . Bare land area affected wind can be naturally spread even no grazing in winter and spring after bare land appeared in grassland. For example, bare land rate was 51.6% at5th autumn and was 71.6% at 6th spring. Wind erosion appeared rapidly under wind action after ground surface baring. 90% measured points appeared wind erosion and average depth of wind erosion was 25cm and the greatest depth 90cm at 5th under overgrazing ,and wind-sand landscape had appeared. Contributing rate of animal grazing to ground surface baring in summer was 41.3% and contributing rate of wind erosion in winter and spring was 58.7%.

为了掌握我国北方半干旱地区沙质放牧草地的沙漠化过程 ,在内蒙古东部的科尔沁沙地进行了为期 5年的放牧试验。结果表明 ,在牧草利用率为 70 %的过牧条件下 ,草地植被盖度、高度、个体大小和根量急剧降低 ,第 5年分别只有 10 .1%、1.0cm、2 .5cm3 /株和 18.7g/m2 (0 - 30cm土层内 ) ,是禁牧区的 12 .0 %、3.0 2 %、0 .86 %和 2 2 .1%。同时 ,家畜觅食活动增加 ,对草地践踏作用增强 ,如第 5年其单位面积的蹄印数和每只羊单位面积的蹄印数达到36 .4n/m2 和 8.5n/m2 ,分别是轻牧区的 9.6倍和 8.2 5倍 ,土壤紧实度是禁牧区的 3.75倍。植被盖度、高度、根量和植物个体普遍降低 ,家畜喜食植物首先从草地中退出后 ,草地开始出现小块裸斑 ,随着过牧的继续 ,这种裸斑迅速增加和扩大 ,使之相互连接成为大片裸地 ,如试验当年过牧区裸斑数仅为 19个 ,而且 73.7%是≤ 2 .5m的裸斑 ,到第3年裸斑数迅速增至 35 8个 ,>2 .5m的裸斑比例从 2 6 .3%增加到 31.3% ,裸地率由 1.8%增加到 35 .8% ,第 ...

为了掌握我国北方半干旱地区沙质放牧草地的沙漠化过程 ,在内蒙古东部的科尔沁沙地进行了为期 5年的放牧试验。结果表明 ,在牧草利用率为 70 %的过牧条件下 ,草地植被盖度、高度、个体大小和根量急剧降低 ,第 5年分别只有 10 .1%、1.0cm、2 .5cm3 /株和 18.7g/m2 (0 - 30cm土层内 ) ,是禁牧区的 12 .0 %、3.0 2 %、0 .86 %和 2 2 .1%。同时 ,家畜觅食活动增加 ,对草地践踏作用增强 ,如第 5年其单位面积的蹄印数和每只羊单位面积的蹄印数达到36 .4n/m2 和 8.5n/m2 ,分别是轻牧区的 9.6倍和 8.2 5倍 ,土壤紧实度是禁牧区的 3.75倍。植被盖度、高度、根量和植物个体普遍降低 ,家畜喜食植物首先从草地中退出后 ,草地开始出现小块裸斑 ,随着过牧的继续 ,这种裸斑迅速增加和扩大 ,使之相互连接成为大片裸地 ,如试验当年过牧区裸斑数仅为 19个 ,而且 73.7%是≤ 2 .5m的裸斑 ,到第3年裸斑数迅速增至 35 8个 ,>2 .5m的裸斑比例从 2 6 .3%增加到 31.3% ,裸地率由 1.8%增加到 35 .8% ,第 5年裸斑平均长度由 2 .4m增加到 4 .1m ,>2 .6m的裸斑比例增至 4 5 .7% ,裸地率达到了 5 1.6 %。当地面出现裸斑后 ,即使冬季不进行放牧 ,在风力的作用下草地中的裸地面积也会自然扩大 ,如第 5年秋季过牧区的裸地率为 5 1.6 % ,到

There are many factors affecting outdoors sports, activity among which the size of water and green land rate can affect the utilization of habitats. It selects 6 green lands people like to use and 6 green lands people do not like to use. Through the analysis of water size and green land rate, we get the discriminate function, and elicit the force of two factors and distributing of discriminate point. It validates the mistake rate. It can provide basic data of tourists for designers.

影响户外活动的因素有很多,其中水面的大小、绿地率的高低均直接影响居民的利用。分别选择6处喜欢利用和不喜欢利用的住宅绿地,通过分析其水面与绿地率的多少,求得判别函数式,明确两因素各自的影响力及判别得点的分布,并验证判别结果的误判率等,为设计者提供利用者需要的基本参考数据值。

 
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