荒漠化 的英文怎麼說
中文拼音 [huāngmòhuà]
荒漠化
英文
desertification-
The remote sensing quantitative retrieval model for the appraisable factors of desertification monitoring are founded. in naiman country, inner mongolia, the experimental area, the hyperspectral imaging spectrometer data in plant growth seasons are collected by state - produced airborne hyperspectral imaging spectrometer omis - i, and the etm + image is also obtained. meanwhile, ground investigation and measurement are made, which include the measurement on reflection feature of different kinds of geo - targets and the ground investigation data necessary for spectral rebuilding and retrieval models of the appraisable factors of desertification monitoring
本研究以內蒙古奈曼旗作為研究試驗區，採用我國自行研製的機載高光譜成像光譜儀omis - ，在植被生長季節取得高光譜解析度成像光譜儀數據和etm ~ +圖像，並進行了同步的地面調查及量測，包括不同類型地物反射特性量測和光譜重建以及荒漠化監測評價因子定量反演模型所必需的地面樣方調查數據。And understanding and studying the spectral features and variation rules of geo - targets in the experimental area, raising that it is the basis of geo - targets information collection with imaging spectrometer data to understand spectral features and variation rules of geo - targets, realizing that in a great extent spectral - integrated - form - based classification method can remove the phenomenon of " different spectrum with same objects " resulted from reflection ratio curve translation because of the angle change among sensor, targets and observation direction, and the average and variance images can be introduced to solve the problem of two kinds of geo - target with similar spectral forms and much different values of whole reflection ratio. it is suggested that " red edge " range bands of vegetation, which has close relationship with vegetation cover and biomass, is the main characteristic bands and important basis for careful vegetation classification and quantitative retrieval, and pixel - based derivative spectral analysis is very useful for removing the effects of soil background values and quantitatively retrieving vegetation biomass and cover. the remote sense quantitative retrieval model is developed for main appraisable factors of desertification monitoring assessment with imaging spectrometer data and then the applicability of model is analyzed
研究結果如下：首先針對荒漠化地區的地物特徵，對高光譜數據不同波段的數據質量、波段組合進行了評價，提出了適用於荒漠化監測的基本波段選擇集；初步了解和掌握了研究地區的地物光譜特性及變異規律，進一步明確了掌握地物光譜特徵和變異規律是用成像光譜儀數據提取地物信息的基礎；發現了基於光譜整體形狀的分類方法在很大程度上能夠消除由於傳感器、地物目標觀測方向之間的角度變化引起的反射率曲線整體平移的「同物異譜」現象，對于譜形相似而整體反射率的值相差較大的兩類地物，通過引入均值和方差圖像參與分類得到解決；研究還表明在植被「紅邊」范圍內的波段是進行荒漠化監測的主要特徵波段，這些波段與植被生物量和蓋度都有密切的關系，是開展精細植被分類研究和植被定量反演的重要基礎；像元的導數光譜分析可以消除土壤背景的影響，是進行植被生物量和蓋度定量反演的有力工具；建立了荒漠化監測主要評價因子的定量反演模型，並分析了模型的適用性。Do you know how much arable land has been desolated
你知道什麼每年有多少土地荒漠化嗎？Based on field research and the dynamic analysis of remote sensing data of different time ( 1987 tm, 1996 tm and 2000 china - brazil earth resource satellite ccd ), using multi - information of research area ( including data of geology, geography, hydrology, meteorology, economy, human culture and dem ) and existing research results, the dissertation discusses drive factors of desertification and the relationships between drive factors and desertification with the help of gis tool and some mathematical methods such as probability, statistics, curvilinear estimation, logical analysis and analytic hierarchy process
論文在對研究區土地荒漠化現狀野外調研和不同時相（ 1987tm 、 1996tm和2000ccd ）遙感圖像土地荒漠化信息提取和演變分析的基礎上，結合研究區已有的多元信息基礎資料及研究成果（包括地質、地理、多時期的水文氣象、經濟、人文以及dem數據等） ，運用gis強大的空間分析功能和概率統計、曲線估計、邏輯分析、主成分分析、層次分析等數學方法綜合研究了土地荒漠化與各驅動因子之間的相關關系，揭示了研究區土地荒漠化的主要驅動因素，探討了荒漠化動態演化規律。In addition to the development of hungriness, the water environment has been destroyed greatly in west china. shortage of water resources, water pollution and depravation of water environment have become the bottle - neck which restricts the development of west china
加之荒漠化的不斷發展，中國西部水環境已受到嚴重破壞，水資源短缺、水污染、水環境惡化已成為嚴重製約廣大西部地區經濟發展的瓶頸。There is great desertification in the east of hainan island of china due to over - mining of ilmenites
摘要多年來，由於對鈦礦的無序開采，使得海南島東部出現大面積的土地荒漠化。Brilliance of motherhood warms desert
婦女與防治荒漠化國際會議側記Reasonless economic activities of human beings, such as over - reclamation, overgrazing, denudation, misuse and gouging, trigger and accelerate land desertification, which are only the exterior causes of land desertification
摘要人類不合理的經濟活動，如濫墾、濫牧、濫采、濫伐、濫用等觸發並加速了土地荒漠化的進程，但這只是制約土地荒漠化的外在機制。Moderate and rotational grazing can do some good to the development of leymus secalimus population, and ca n ' t result in desertification in grassland
適度的輪牧可促進賴草種群的發育，增加植被蓋度，不會導致荒漠化。The first geologic reason for degeneration of the eco - environment in the headwater area of the yellow river is that the increase of the recent geologic function caused desertification and grasslands resource decreased and underside changed, destroied the balance of water - air - heat in the area ; the second is that the water environment changes by the degradation and atrophy of frozen earth cause multilayer and synthesis cause of formation degeneration of the eco - environment ; the third is that the man and rats function accelerated degeneration of the eco - environment in the headwater area of the yellow river
摘要黃河源區生態環境惡化的地質原因之一是現代地質作用增強，形成以荒漠化為主的草地資源退化與下墊面改變，地區水氣熱平衡破壞；二是因凍土退化、萎縮，引起水環境變異，導致多層面與綜合成因的生態環境惡化；三是人為及鼠類活動對源區生態環境惡化起著推波助瀾的作用。And climatic variation is a main factor affecting desertification. the sustained period of water deficit is a direct cause of desertification in arid and semi - arid areas. the tectonic activities of lithosphere control the distribution of desertification by constructing geomorphology
提出了自然作用在土地荒漠化演化中佔主導地位，其中，氣候變化是控制土地荒漠化進退的首要因素，地表水持續虧損則是導致乾旱、半乾旱地區土地荒漠化發展的直接原因。Since 1979 china has signed a series of international environmental conventions and agreements, including the convention on international trade in endangered species of wild fauna and flora, international convention for the regulation of whaling, vienna convention for the protection of the ozone layer, basel convention on control of transboundary movements of hazardous wastes and their disposal, montreal protocol on substances that deplete the ozone layer ( revised version ), framework convention on climate change, convention on biological diversity, convention on combating desertification, convention on wetlands of international importance especially as waterfowl habitat, and 1972 london convention
中國自1979年起先後簽署了《瀕危野生動植物種國際貿易公約》 、 《國際捕鯨管制公約》 、 《關于保護臭氧層的維也納公約》 、 《關于控制危險廢物越境轉移及其處置的巴賽爾公約》 、 《關于消耗臭氧層物質的蒙特利爾議定書（修訂本） 》 、 《氣候變化框架公約》 、 《生物多樣性公約》 、 《防治荒漠化公約》 、 《關于特別是作為水禽棲息地的國際重要濕地公約》 、 《 1972年倫敦公約》等一系列國際環境公約和議定書。Fuzzy synthetical assessment of land desertification in debris activity region
泥石流多發區土地荒漠化程度模糊綜合評判研究The problem of desertification is a global problem, and it is paid attention extensively. concerning the problems of desertification in china, some ideas are put forward
摘要荒漠化問題是個全球問題，受到了廣泛的關注。就目前我國的荒漠化問題，本文提出了幾點想法。Desertification of land has been a serious problem of global ecological environment and threatened the living environment and sustainable development of human being socienty
土地荒漠化是當前全球生態環境中的一個嚴重問題，危及到人類社會的生存環境和可持續發展。According to the configuration and ecotope of the earths surface, the coverage of vegetation, occupation ratio of bare sandy land and the soil texture were selected as evaluation indexes by using the field investigation data
利用外業調查數據，依據地表形態和生態狀況的變化，確定了植被蓋度、裸沙地佔地百分比和土壤質地3項評價指標，並建立了基於遙感的科爾沁沙質荒漠化評價指標體系，其中裸沙地佔地百分比用混合像元分解的方法獲得。According to the nature and features of imaging spectrometer data and the field investigation and other data, on the basis of the pre - treatment of imaging spectrometer data, desertification information collection are implemented from the aspects of theoretical analysis and empirical fitting
根據成像光譜儀數據的性質、特點結合地面調查和其他現有的數據，在高光譜數據的預處理的基礎上分別從理論分析和經驗擬合兩個角度實現了荒漠化地區的信息提取和定量化分析。Especially, river retreat in drying year becomes one of the main causes of desertification because of the decrease of runoff
尤其枯水年徑流量的減少可能成為影響盆地荒漠化的原因之一。Soil and water conservation and desertification combating
水土保持與荒漠化防治Biological mechanism of sandy desertification in grassland reclamation area in north china
草原農墾區土地沙質荒漠化過程的生物學機制分享友人