The results showed : there were close relationships of rainfall intensity during once precipitation , soil moisture content between two adjacent rainfall , plant coverage , grade of slope and the amount of soil erosion 研究表明该区次降雨雨强、降雨前期土壤含水量、植被覆盖度、坡面坡度和土壤侵蚀量之间存在着密切的相关关系。
By on the spot review of miyun valley , the result of estimation of vegetation fraction is proved to be valid . the result suggests that using this improved model to estimate vegetation fraction is feasible 通过密云流域的实地考察，对植被覆盖度的估算结果进行了验证，结果表明使用此改进模型进行植被覆盖度遥感监测是可行的。
As a part of the soil and water conservation environmental project of guanting and miyun reservoir upper reaches area , the vegetation fraction of guanting and miyun reservoir valley is estimated using this technical route 作为官厅、密云水库上游水土保持生态环境建设项目的一部分，应用此技术路线对研究区植被覆盖度进行了估算。
Moreover , the tio2 film particles distribute more uniform and join tightly with the increasing of power , but the surfaces of films become closer and smoother when pressure increased or the ratio of oxygen decreased 提高功率可提高膜的覆盖度，使溅射膜颗粒分布均匀，结合更加紧密。提高压力或减小氧氩比，可使溅射膜的颗粒更加密集。
( 3 ) the results of landscape health assessment indicate : vegetation bestow rate contributes to landscape health assessment most , while soil and water loss and restoration ability in the second place ( 3 )进行景观健康评价的结果表明，植被覆盖度对退化生态的景观健康评价贡献最大，其次是水土流失与恢复能力。生态退化最严重的是大于25 。
The area of middle and high vegetation descended , most of the oasis directly face the desert . in the mountain area , the change of no vegetation area was not obvious , and the area of forest increased a bit 中、高覆盖度植被(过渡带)面积减少，过渡带变窄，绿洲更多的直接面临荒漠;西部干旱区山区的荒漠面积变化不大，森林面积略有增加。
Developed classification systems of vegetation cover in arid land of western china , and use the changing of vegetation area of serial times to analyze the change of the vegetation in each area in arid land of western china . 5 在干旱区提出了植被覆盖度的分类体系，并使用连续时间的各类植被面积变化分析了干旱区各地区的植被变化情况； 5
( 3 ) with cover level increasing , losses amounts of runoff silt and n and p in silt increased . ( 4 ) with cover level increasing , tn in soil and silt decreased , but nh _ ( 4 ) - n + no _ ( 3 ) n in runoff did n ' t reduced N素的养分特征表现为土壤全氮随植被覆盖度增大而减少流失，径流矿质氮随植被覆盖度增大并无减少，而径流泥沙t - n则呈现减少的趋势。
Unsiipervised classified was used to classify the tm image over the region . according to the data on the spot and gps , the classified result was estimated . the classified accuracy is 92 % , so the classified result is credible 本文根据野外实地调查和gps定点定位调查资料，对黄河源区植被覆盖度分级结果进行评价，整个地区植被覆盖度分级准确度达92 ，效果较为理想。
The pinning of the surface fermi level at 0 . 29 ev above its initial value , equivalent to a variation of schottky baxrier height of 0 . 67 ev is observed upon deposition of ~ 0 . 6 ml er onto the clean p - type si ( 00l ) ( 2xl ) surface at room temperature 通过对测得的硅和铒的芯能级和价带的分析，得到了以下结论：随着铒覆盖度的增加至约为0 6单层，表面fermi能级被钉扎在其初始值0
