vegetation cover 中文意思是什麼

vegetation cover 解釋
植被覆蓋率
  • vegetation : n. 1. 【植物；植物學】營養體生長，發育；〈集合詞〉植物，植被，植生，草木。2. 無所作為的生活，單調的生活。3. 【醫學】贅生物，增殖體。adj. -al
  • cover : vt 1 覆蓋，遮蔽，包裹；戴帽子；包庇，隱蔽，掩蓋；滅跡，（用紙）表（墻）。2 孵（小雞）；（種馬）交...
  1. 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。
  2. Meanwhile, the study also shows that the diversity of studied cave animals is inversely proportional to human population density and water quality ; and bio - diversity, to some extent, is proportional to soil fertility and amount of chemical fertilizer, but inversely when excessive ; the correlativity between bio - diversity and vegetation cover rate is not obvious, when ground vegetation is strongly interfered by human being ; the amount of diestrammena marmorata is proportional to the d iversity of plant, and inversely proportional to soil fertility, and in a way, to water quality ; and the correlativity between community and water quality and soil fertility, and between water quality and the amount of mosquito and fly, is not as good as expected. the author points out that diestrammena marmorata, bat, mosquito, fly, oreolalaxrhohostig metus ( or cudata ), and fish can be chosen as in

    同時，研究還表明：調查洞穴的物種多樣性與人口密度、水質成負相關；在一定范圍內，物種多樣性與化肥施用量、土壤肥力成正相關，超過一定的值則成負相關;在人類對地表植被的高強度作用下，物種多樣性與植被覆蓋率的相關性不明顯;蚊蠅數量與土壤肥力基本上呈正相關;斑灶馬數量與植物種數呈正相關，斑灶馬數量與在一定水質范圍內與水質呈負相關，與土壤肥力呈負相關;群落數與水質和土壤肥力、蚊蠅數量與水質都不能表現較好的相關性;研究認為，可以選擇斑灶馬、蝙蝠、蚊蠅、紅點囊蟾（或有尾類） 、魚類等作為指示動物對洞穴環境進行監測。
  3. Mongolica young stand, secondary natural forest, and the mixed forest of larix olgensis and fraxinus mandshurica rupr. countermeasures for controlling soil degradation were also recommended. the study got following results : ( 1 ) from young stand to mid - age of larix olgensis, with the closure of canopy and the decrease of undergrowth vegetation cover, soil acidity, enzyme activity, total inorganic phosphorus, available k, soil moisture and total porosity decreased significantly ; while soil organic matter content, humus component content, the amount of three main types of microbes, acid phosphatase activity, and bulk density in rhizosphere soil and non - rhizosphere soil increased with the increase of the amount of forest floor litter ; from mid - age stand to near mature stand, with the decrease of stand density and crown cover as well as the restoration of undergrowth vegetation after preliminary thinning, soil organic matter content, fulvic acid, exchangeable acidity, exchangeable aluminium, neutral phosphatase activity, total amount of inorganic phosphorus, the amount of actinomycetes, soil moisture, and total porosity in rhizosphere soil and non - rhizosphere soil apparently increased ; from near matu re stand to mature stand, soil activity acidity, organic matter content, humus component content, available phosphorus, total amount of amino acid, available k, soil enzyme activity, soil moisture, and total porosity in rhizosphere soil and non - rhizosphere soil decreased, but total phosphorus, soil acidity ( in particular, exchangeable aluminium ), and bulk density increased

    結果表明： （ 1 ）從落葉松幼齡林到中齡林，隨著林冠的郁閉和林下植被蓋度的急劇下降，林地土壤酸度、土壤酶活性、無機磷總量、速效鉀、土壤水分含量、總孔隙度呈明顯下降趨勢，而根際和非根際土壤有機質含量、腐殖質各組分含量、三大類微生物數量、酸性磷酸酶活性和土壤容重隨著凋落物的增加呈明顯上升趨勢；從中齡林到近熟林，由於撫育間伐，林分密度及郁閉度下降，林下植被蓋度逐步得到恢復，根際與非根際土壤有機質含量、富里酸、交換性酸、交換性鋁、中性磷酸酶、無機磷總量、放線菌數量、土壤水分含量、總孔隙度呈明顯的上升趨勢；從近熟林到成熟林，隨著林齡的增大，根際與非根際土壤活性酸、有機質含量、腐殖質各組分含量、有效磷含量、氨基酸總量、速效鉀、土壤酶的活性、土壤水分含量和總孔隙度呈下降趨勢，而根際與非根際土壤全磷含量、土壤酸度（特別是交換性鋁）和容重呈增加趨勢。
  4. The species and genera of the vegetation cover mainly consisted of warm - dry plants whose main type is the alternation of the forest grassland or grassland

    植物種屬以溫帶乾旱植物為主，植被類型多為森林草原及草原交替出現為主。
  5. For parameter a, there is a close relationship exist between a ( 9, sr ) in two different radar incident angle that can be expressed as : with considering the effects of soil texture, we get the final expression of the inversion model : where mv ( t1 ), mv ( t2 ) is volumetric soil moisture content in two different temp, c, d is soil type related parameters, and v ( t1 ), s ( t2 ) is coresponding bare soil radar backscattering coefficients. inversion results show that for the c band hh polarized radarsat scansar data with a range of incidence angle from 20 to 40, the soil moisture change value can be derived with an acceptable accuracy using the above model. the temporal and spatial soil moisture change patterns are associated with rainfall and vegetation cover, as well as the soil hydraulic characteristics

    利用最新發展的電磁波散射模型研究了不同植被覆蓋地表雷達波對地表土壤水分的敏感性，建立了半經驗植被雷達後向散射模型; 2 ） .研究發現在農作物等矮小植被覆蓋地表，植被層直接後向散射與植被類型相關，且在植被生長期，雷達後向散射系數對植被含水量的敏感性要高於對植被高度變化的敏感性; 3 ） .解決了單參數雷達地表土壤水分反演問題中，雷達入射角和地表粗糙度的影響這一難點問題; 4 ） .利用土壤介電模型校正了不同土壤類型對反演地表土壤體積含水量的影響; 5 ） .在以上成果基礎上，建立了完整的單參數雷達地表土壤水分變化探測反演演算法，經地表驗證，模型反演地表土壤水分變化值的精度為rmse = 0
  6. The name may have derived from the fact that the island has little vegetation cover and bears resemblance with a naked body, da chek lak in cantonese

    該島名由來，相傳是由於該島黃土處處，植物稀疏，似人體赤露上身，廣州話俗稱打赤肋。
  7. Ecause it is hard work. for the past three years, from june to october, ha si has been studiously monitoring the condition of her pastures to check on the rate of vegetation cover

    除了搞好劃區輪牧，從2002年開始，哈斯還每年從六月份到十月份在自己的草原上進行草原監測，看草原的恢復情況，看植被的覆蓋率。
  8. 6. when the rainfall frequency was 83. 11 % that belong to low energy of rainfall, vegetation cover rate that was bigger than 80 % can totally diminish runoff energy, and prevent soil erosion. with eroded rainfall energy increasing the cut rate of vegetation for erosion gradually weak

    （ 6 ）對于發生頻率為83 . 11的低動能降雨，植被蓋度80可完全削減徑流能量，防止水土流失；隨著侵蝕性暴雨動能的增加，植被對徑流能量的削減率逐漸減弱。
  9. In order to prevent high - energy storm erosion we not only need augment the vegetation cover rate but also need soil conservation project measure

    為有效地防止高動能暴雨侵蝕，除注重增加植被外，還需配套水土保持工程措施。
  10. Analysis on the methods for assessing vegetation cover based on rs in alkali region, northwest china

    中國西北鹽堿區植被蓋度遙感方法分析
  11. When vegetation cover - degree is 60 %, amount of slowly available k, rapidly available k, and dissolved k lost in the runoff are less 97. 49 %, 97. 31 %, and 73. 14 %

    當植被覆蓋度達到60時，緩效鉀、速效鉀和溶解態鉀流夫量分別比裸地減少了97 49 、 97 31和73
  12. 1 toyo mulching is a double layer of non - woven fertilizer strip which is installed inside the three dimension pvc coated wire mesh and fixed on any non - soil surface slope with galvanized mild steel anchor and sub - anchor to provide full vegetation cover to the slope

    1直身吹附法是將兩層帶狀肥料及植物種子安裝在鐵網中，並利用金屬勾穩固在噴漿斜坡上，使斜坡表面達至綠化效果。
  13. There is a strong relationship between the vegetation cover and stability of oasis ecosystem which is the key location of mankind production and existence in arid and semi - arid land. the change of vegetation cover in arid and semi - arid has very important influence on the oasis eco - system, as it is very sensitive to the environment changes to oasis direction or to desert direction that the fluctuating index of vegetation cover. the vegetation cover rate change great effect on realizing the characteristic

    植被覆蓋度對于乾旱區人類生存和生產核心場所的綠洲穩定有著直接的關系，在乾旱區覆蓋度的變化對本已脆弱的綠洲生態系統有著重要的影響，是向綠洲化還是向荒漠化的方向發展，十分敏感於綠洲植被覆蓋度的指數，了解各類植被覆蓋度的特徵及演化規律，對認識乾旱區生態環境的現狀及發展趨勢，辨識引起環境變化的驅動力，有著重要的意義。
  14. Analyzing the different vegetation cover rate of impact on runoff energy, we draw the cutting rate for runoff energy would increase with the vegetation cover rate increased

    （ 5 ）對不同植被蓋度對徑流能量的影響分析得出，植被蓋度越大，對徑流能量的削減率越大。
  15. Successfully applied markov process to analyze the change of vegetation cover, and point out the change of vegetation transition is not a single markov process but a multi - markov process and also is a long term process. 9. the writer proved that under the 8km resolution, the markov process ca n ' t estimate the trend of land use by two term - data no matter it ' s sequence or at intervals. through analyzing the change of each vegetation area, the change of spatial data and the markov process, the main conclusions are : in plain of china western arid land, the desert area decreased and the oasis area increased, most of the increase represents extension of the traditional oasis

    利用回歸方程對今後的植被變化情況進行了模擬預測，其結果具有一定的參考價值；南京氣象學院博士學位論文8 .將馬爾科夫過程成功地應用於中國西部干早區的植被變化分析當中，指出，植被的轉移變化不是一重馬爾科夫過程，而是一個多重的馬爾科夫過程;而且是一個步長較長的馬爾科夫過程; 9 .證明在8klll尺度下，馬爾科夫過程不能使用兩期的土地利用變化來預測土地利用的發展趨勢，無論這兩期的時間是連續的還是有一定時間間隔的;通過各類植被的面積變化、空間變化及馬爾科夫過程分析認為:中國西部乾旱區在平原區整體上荒漠面積減少，綠洲面積增加，綠洲的面積擴大主要表現在原有綠洲的擴大。
  16. The others showed partly decreased, but the degradation of vegetation were obviously in lower reaches of tarim and cherchen river ; in the mountain area of southern xingjian, the forest area were increased, and the others decreased ; in northern xingjian, both the mountain and the plain area increased. they showed the decrease of desert and the increase of oasis ; the change of vegetation cover in the hexi corridor - alax desert were not obviously ; but in chai - damu basin, the area of desert and low cover grassland increased, the others vegetation decreased, especially in the high cover grassland. that showed the great degradation of ecosystem, and the most of degradation was shown in the north hillside of the arjin mountain and qi - lian mountain

    而從各個分區來看，情況不盡相同:南疆地區平原區綠洲面積擴大，荒漠面積基本不變，其他類植被面積不同程度縮小，而在塔里木河下游、車爾臣河下游植被退化;南疆山地森林面積略有增加，其他類植被面積略有縮小;北疆的平原區和山區的植被狀況均有改善，表現為荒漠面積縮小，綠洲面積增加;河西走廊一阿拉善地區總體變化不大;但是柴達木盆地的荒漠面積、低覆蓋度草地增加，其他類植被，尤其是甚高覆蓋度植被（草甸）的面積縮小，表明該地區的生態環境退化，而退化表現的主要地區在環柴達木盆地的阿爾金山和祁連山的北坡。
  17. Vegetation index seasonal change and vegetation cover analyzing in hainan island

    海南島植被指數季節性變化及植被覆蓋分析
  18. But the temporal and spatial characteristics of change of landscape are different among different types of beijing mountain area. in terms of different areas, the condition of vegetation cover in a whole has an increased trend in changping district, huairou county and miyun county

    結果表明： （ 1 ）就不同區域而言，昌平區、懷柔縣以及密雲縣的植被覆蓋狀況整體表現為增加趨勢；平谷縣表現為減少的趨勢，而門頭溝區的植被覆蓋率雖然較高，但其有轉變為差的趨勢。
  19. 3. making the synthetic analysis with models and methods of rs and gis, this thesis achieves the data collection and information extraction of the ecological function regionalization indicators system, form the research achievements fixed region ecology environment system shape form. and analysis the land cover, vegetation cover, soil erosion etc. with rs, gis tools

    3 .採用遙感技術和地理信息系統技術的多種模型與方法綜合分析，實現生態功能區劃指標體系各指標因子的數據收集和信息提取，形成定量反映區域生態環境系統安全形狀的研究成果:並對土地覆蓋、植被覆蓋、水土流失等主要因子進行了遙感分析和gis空間分析。
  20. Study of classsification of vegetation cover by applying rs and gis in hechuan chongqing

    以重慶合川市為例
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