查询词典 drought-resisting

Pure-remote sensing information models are free of the numerous distributional parameters that are difficult to obtain in vast area. The following sections are included in the study.(1) The VCI and SVI based on time-series NDVI data are used to analyse regional drought and the following results were reached: As the vegetation growth status index, the response of VCI and SVI to precipitation was land cover type, temporal and site specified. So VCI and SVI have little information about drought when used to monitor regional drought especially in China that has a mountainous topographty.(2) Based on the interpretation of NDVI-Ts space, NDVI and land surface temperature was combined to construct NVDI-Ts space from which the TVDI (Temperature Vegetation Dryness Index) was obtained with line ratio method and normalized slopes method. When compared with the topsoil moisture measured in situ, TVDI are competent in regional drought monitoring. Illumed by the NDVI-Ts space, we combined the NDVI with day/night land surface temperature difference and apparent thermal inertia to construct NDVI-ΔT and NDVI-ATI spaces from which the DVDI and AVDI were estimated respectively with 8-day composite MODIS 〓 product and 16-day composite MODIS NDVI product.

具体包括以下几方面的内容：(1)VCI和SVI在干旱监测中的作用评价：探讨利用NDVI时间系列数据建立的植被状态指数和标准植被指数评价区域干旱的可行性，研究结果表明：VCI和SVI作为植被相对生长状况指标，对降水的响应随着植被覆盖类型、时间和空间等而表现出不同的敏感性，因此在大区域干旱监测中，特别是我国这样地形复杂多样的国家，VCI和SVI在干旱监测中的作用都是有限的；(2)利用TVDI评价全国干旱等级分布：结合陆地表面温度和植被指数建立NDVI-T〓空间，在NDVI-T〓空间物理意义理解的基础上，分别采用线段比值法和斜率归一化法构建温度植被干旱指数，并利用TVDI研究了我国2000年3～5月份各旬的干旱分布，取得比较满意的结果。

Results indicated there were significant seasonal and spatial distribution characteristics. Drought occurred in high frequency at the stage of tasselling to silking and thereafter. Drought frequency obviously increased with backwards shift of growth stage. Light drought happened in higher frequency than medium and severe drought.

结果表明，湖南春玉米生长季节内干旱呈现明显的季节性和空间区域分布特征：干旱频率较高的时段主要在玉米抽雄－吐丝阶段及其后的生育阶段，且随生育期后移干旱频率明显增加，以轻旱程度为主。

The paper is based on the theory of inter-function between water and rock, and losing energy in rock mass, brought forward that the water flow has head loss during water flow intruding through the coal seam effective water-resisting layer and energy waste concept for splitting rock mass, and analyzed the form of the remaining water pressure. Through the simulation experiment in the preventing water capability of water-resisting rocks in the coal seam scaleboard, studied the law, character of the losing in water head waste and the relation to pressure, water-resisting of hydrogeology and engineering geology character. Brought forward the new method of calculating the water inrush coefficient.

通过理论分析和实验研究，本文得出以下结论：高承压水在沿煤层底板隔水层导升过程中存在着明显的压力水头损失；同一地层条件下，煤层底板承压水水头压力越大其导升过程中的水头压力损耗就越大；同一水头压力条件下，地层的渗透性越差其阻水能力越强，水流导升过程中的水头压力损耗也越大；在同一介质中，当初始水头压力不同时，水流在导升过程中水头压力的衰减不同，在同一隔水介质中底板含水层水头压力越大其沿隔水层导升过程中的水头损耗也就越大，水头损耗随底板隔水层水头压力增加而呈递增趋势，另外它们相应的水头衰减速率也呈递增趋势，煤层底板隔

Whereas reservoir in EOR is high temperature and high degree of mineralization, polymer must take on good tractability and strong ability of resisting temperature and resisting salt, resisting shear to reach perfect effect as a kind of oil-displacing agent.

鉴于油藏温度高以及矿化度高的特点，要达到理想的效果，聚合物必须具有很好的增粘能力和很强的耐温、抗盐及抗剪切的能力。

Good aging-resisting and ozone-resisting performance to prove its heat-resisting performance.

具有优良的耐天侯老化和抗臭氧化作用，显著地提高了丁腈橡胶的耐热老化性能。

Medicago falcata L. is a perennial herb in leguminosae. There are many excellent characteristics which are cold and drought resistance, salt tolerance, windy and dusty resisting, leanness tolerance and diseases and pests resisting.

黄花苜蓿是豆科苜蓿属多年生草本植物，具有抗寒、抗旱、耐盐碱、耐风沙、耐贫瘠，抗病虫害等优良特性。

SOD and POD were important antioxidant enzymes for resisting drought in seedlings of Broussonetia papyrijera L., which can effectively avoid the iniury of oxidative stress for the trees through inducing the plasma-membre protection system. But the function of CAT to resist drought was not obvious.

SOD和POD是构树幼苗抗干旱的重要抗氧化酶，它能够通过自身诱导抗氧化酶系统以提高适应能力而忍受逆境，但构树幼苗的CAT酶在抗干旱胁迫上的作用不明显。

Some drought-resisting indices were observed in the condition of controlling water supply artificially on potted planting Ceratoides, the results as follows. Leaf water content was gradually decreased with the drought stressed days increasing. In the stressed period, the decrease of C.arborescens's leaf water content was more than that of C.lanata.

试验通过盆栽控水的方法进行各指标的测定，经过分析，结论如下：叶片含水量和相对含水量随着胁迫天数的增加而逐渐减少，胁迫期间，华北驼绒藜的降幅明显低于绵毛优若藜，前者在胁迫期间变化平缓，后者下降幅度较大，不同处理天数间存在明显差异。

Ginkgo is more drought tolerant,and maintain relatively higher Pn under drought;Robinia pseudoacacia is less drought tolerant,and Pn decrease greatly under stress;Ailanthus altissima is placed in the middle.

耐旱能力较强的银杏在干旱胁迫下维持较高的光合作用；刺槐的抗旱能力最弱，光合速率下降幅度最大，臭椿居中。

By taking one-year-old micropropagated K2, K3 and ordinary duplation black locust as study objects, the difference in drought resistance abilities among three clones were evaluated under stimulant natural drought and gradual drought of soil.

本实验设置了模拟自然干旱和土壤逐渐干旱两种处理，以普通二倍体刺槐为对照，研究了三个品种的一年生组培苗间与抗旱性相关的生理生化指标的差异。

It also analyzes the feature and development of semi-finish grinding and finish grinding by roller press.

同时进行了辊压机半终粉磨和终粉磨系统的特点和发展分析。

When I got there, water was dripping slowly from the ceiling and forming a pool on the floor.

当我到那里的时候，水是慢慢地从天花板滴而且形成在地板上的一个池。