查询词典 arid

The product is particularly well suited to the development of agriculture and animal husbandry, reforestation, gardening and landscaping, flora-cultivation, anti-desertification in arid and semi-arid areas.

该产品尤其适用于干旱及半干旱地区的农牧业生产、植树造林、园林绿化、花卉种植及土地荒漠化治理。

The management of arid and semi-arid areas.

指对干旱和半干旱地区的管理。

Desertification is a serious problem in arid and semi-arid regions in China.

荒漠化是我国干旱、半干旱地区面临的最严重的问题。

Meanwhile, the local people created, from the long-time practice, the rainwater collection and water-saving irrigation as means for improving eco-environmental attainability and increasing fields' productivity, and energetically developing high-yield ecological agriculture, thus offering a new way for solving the problem of agricultural development in the arid or semi-arid region.

在长期实践中，定西地区将集雨节灌作为改善生态环境和提高土地生产力的结合点，大力发展雨水集蓄节灌高效农业，为解决旱地农业问题，实现可持续发展提供了一条新思路。

Bryophyte ; ecology ; arid and semi-arid areas ; research review

苔藓植物；生态学研究；干旱和半干旱地区；综述

ARID (AT-rich interaction domain) protein is a transcription factor family in higher eukaryotes that regulates cell proliferation, development, and differentiation. Specificity of DNA binding ability in this family prefers AT-rich sequences, but some ARID family proteins are not sequence-specific DNA-binding proteins or they do not bind AT-rich sequences. We found two genes that encode ARID in Giardia lamblia genome database, garid1 and garid2. We analyzed the function of garid1 first. AU1-tagged gARID1 was found to localize to nuclei. During encystation, gARID1 mRNA level decreased emphatically, but protein level increased. We also found that gARID1 can bind AT-rich initiator of the cwp1 promoter by EMSA. Mutation analysis revealed gARID1 binding sequence was AGATC and AATAAAATA. We used ChIP to demonstrate that gARID1 can bind cwp1 gene promoter in vivo.

ARID(AT-rich interaction domain)蛋白质家族是真核生物的一种转因子，在许多同种的真核生物有它的同源基因，这个家族的蛋白质通常与调控细胞的生长、发育和分化的作用有关，而这个家族的蛋白质和DNA的结合能，各种ARID蛋白质的专一性尽相同，过大致上偏好於和AT-rich的序结合；我们已经在形鞭毛虫的基因组中找到个含有ARID 的基因，分别是garid1和garid2，我们首先对於garid1做分析；将AU1标记接到gARID1转染形鞭毛虫，用免疫萤光染色可发现gARID1存在於细胞核中。gARID1的讯息RNA在囊体化后会明显下，过其阳性染色和蛋白质表现有明显增加；EMSA实验中也发现gARID1会明显的与cwp1基因启动子之AT-rich initiator结合，经由突变序分析，也显示gARID1的结合序为AGATC和AATAAAATA，随后我们也用ChIP证明gARID1在细胞内也的确会和cwp1基因的启动子结合。

Supported by the ESCAP pilot project on integrated land and water resources management in arid areas using remote sensing and GIS (ESCAP 5-4-401), the land and water resources optimization model was developed and an integrated land and water resources management system based on remote sensing and GIS was designed and developed in this paper.

本文结合联合国亚太经社理事会示范项目"利用遥感与GIS技术进行干旱区水土资源综合管理"（Pilot project on integrated land and water resources management in arid areas using remote sensing and GIS，ESCAP 5-4-401），针对我国广大的干旱半干旱区水土资源综合管理的实际需要，详细讨论了基于遥感与GIS的干旱半干旱地区水土资源综合管理系统的设计思想、目标、结构与功能及系统开发中的关键技术。

On the basis of pollen analysis of surface sample in North China, polynomial function analysis method was applied to establish pollen climate response surface of Pinus, Betula, Quercus, Artemisia, Chenopodiaceae, Compositae, Picea, Ephedra, Gramineae in North China, therefore an easy and applicable method for reconstructing palaeoclimate and palaeoenvironment with data of fossil pollen was founded; Multi-analysis method was applied to analyse the principal elements of surface sample pollen in central Inner Mongolia Steppe, the assemblages of surface sample pollen in steppe area and its relationship with vegetation type were discussed with helps from spore-pollen analysis of a peat section in Chasuqi, Inner Mongolia and 〓C chronometer, fossil pollen data were obtained with high resolution on the peat section in Chasuqi. Vegetation succession and environmental changes since Holocene at resolution of 70 years were primarily reconstructed in south Mount Daqingshan and Plain Tumete. The changes in the area were copmared with those in the neighbouring areas during the same period. It was found that Holocene environmental change had undergone the following stages: cold-arid, temperate-wet, warm-wet, temperate-arid and cold-arid, and the climatical optimum period occurred in 5000-4100 aB.

本文在对中国北方表土花粉研究的基础上，采用多项式函数回归方法建造了中国北方松属、桦属、栎属、蒿属、藜科、菊科、云杉属、麻黄属、禾本科等的花粉——气候趋势面，从而为利用化石花粉资料直接恢复古气候、古环境提供了一种方便易行的方法；采用多元分析方法对内蒙古中部草原区表土花粉进行了主成分分析，探讨了草原区表土花粉组合的规律及与植被类型的关系；本文还应用孢粉分析方法，结合〓C测年技术，通过内蒙古中部察素齐泥炭剖面高分辨率的化石花粉数据，初步恢复了大青山山地南部及土默特平原地区分辨率为70年的全新世以来植被演替和环境变迁的状况，并与邻近地区的全新世古气候、古环境进行了对比研究，研究发现，本区域全新世古环境的变迁序列基本上可以与周围地区及华北地区进行对比，其环境变迁经历了凉干～温湿～暖湿～温干～凉干的变化，且气候最适宜期出现在5000～4100aB.P。

With over twenty years experience of product design and commercialisation, ARID has gained a vast knowledge of manufacturing solutions.

经过二十多年的产品设计和商业化操作， ARID 积累了各种制作经验。

Reference crop evapotranspiration (ET0) and new wetness index were both calculated and analyzed according to Penman-Monteith scheme recommended by FAO with routine meteorological data from 616 weather stations in China from 1975 to 2004. In terms of grades of wetness index from Chinese Climate Classification Criterion, China is classified into severe arid, arid, semi-arid, semi-humid and humid zones, respectively, which are compared with the demarcations from rainfall-based indices in order to reveal the similarity and difference in association with the two schemes under current global climate warming. Besides, the spatio-temporal analysis of climate wetness over the country in the past thirty years was performed.

依据中国616个地面气象台站1975年至2004年的日气象资料，利用联合国粮农组织推荐的参考蒸散计算方法，计算参考作物蒸散（ET0）和湿润指数，按照中国气候区划中的干湿指标把中国分为极干旱、干旱、半干旱、半湿润和湿润气候区，并与传统的降水量干湿指标进行对比，揭示在全球气候变化下两种干湿指标的异同，最后对中国近30 a干湿状况进行时空分析。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。