退化速率 的英文怎麼說

中文拼音 [tuìhuàsùlǜ]
退化速率 英文
rate of degradation
  • 退 : 動詞1 （向後移動） retreat; draw back; move back 2 （使向後移動） cause to move back; remove; wit...
  • 速 : Ⅰ形容詞（迅速; 快） fast; rapid; quick; speedy Ⅱ名詞1 （速度） speed; velocity 2 （姓氏） a surna...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 退化 : become vestigial; degenerate; deteriorate; retrograde; devolution; retrogradation; retrogression;...
  • 速率 : speed; rate; tempo
  1. They are jinfo mountain in nanchuan county ( natural protection section ), wuling mountain in qianjiang county ( national emphases forest demonstration county which forest cover rate is beyond 50 % ) and zhongliang mountain in beibei county ( artificial destruction is very grave ). some main land use patterns i. e. woodland, garden, infield, abandon infield, shrub and grassplot are selected in those three sample sites. four aspects on soil fertility index of karst environment under different land use patterns in these three sample sites, are revealed in this paper, by using the field test, indoor measure and analysis, outdoor experiment and field investigation, and the knowledge and technique of soil, ecology, physics and chemistry etc. they are physical characteristic ( effective soil thickness, organic layer thickness, soil texture, water - stable aggregate and soil water etc. ), chemical fertility ( organism, omni - n, omni - p, omni - k, alkali - nitrogen, available p, available k and rapid available k etc. ), soil animalcule ( bacteria, fungi, actinomyces and their grosses ) and soil - seed - pool ( plant community diversity index ) in karst ecosystem

    本研究以重慶市的南川金佛山（自然保護區） 、黔江武陵山（國家重點退耕還林示範縣，森林覆蓋率50以上）和北碚中梁山（遭人為破壞嚴重）典型巖溶區為對象，選擇了幾種重要的利用方式，包括林地、果園、耕地、棄耕地和灌草坡，採用野外巖溶生態調查和室內試驗測量分析相結合的方法，以不同土地利用方式巖溶土壤肥力為重點，對不同土地利用方式土壤肥力特徵進行量化分析，找出巖溶土壤肥力差異的主要方面及其根本原因，論文主要從土壤剖面物理退化指標（有效土層厚度、有機質層厚度、質地、團聚體、水分含量等） ，化學肥力退化指標（有機質、全n 、全p 、全k 、堿解n 、速效p和速效k等） ，樣地土壤微生物指標（細菌、真菌、放線菌數量及總量）以及樣地土壤種子庫植物群落多樣性等4個方面對重慶典型巖溶區的土壤肥力特徵進行了較為詳細的分析研究，為巖溶地區士壤資源的合理利用及結構的調控管理提供依據。
  2. The result of path coefficient analysis is that the factor affect net photosynthetic rate of h. ammodendron mostly is soil salt contents

    通徑分析結果表明，對退化梭梭凈光合速率影響最大的生境因子是土壤含鹽量。
  3. Basically like “ adaptive approach ”, the method can control triangulation density with respect to the change of normal curvature of the surface generating a small number of triangular facets, and thiny triangles, degenerate triangles and “ cracks ” in 3d space will not occur, but the speed of the algorithm is higher than that of adaptive one

    該方法基本上可以像「自適應」方法一樣，根據曲面的法曲率變化來控制三角化剖分的密度，生成的三角片數量較少，並且可以避免在三維空間產生狹長的三角形、退化三角形與「裂縫」 ，運行速度明顯比自適應方法快。
  4. Based on above - mentioned analysis, the strategy and measures to prevent the soil fertility quality degradation of artificial picea mature forest and improve the stand ecological environment were put forward, including the rational management of inter - cutting down and fostering after artificial picea forest matured. because conifer - hardwood forests generally contain more tree species than pure coniferous forest, and their structure also is more complex, forestation in subalpine of western sichuan should be conifer - hardwood forests

    林地土壤有機質主要來源於凋落物的分解，並受其分解速率的控制，解決當前人工成熟林地土壤退化的主要措施應為林地凋落物分解創造條件，即因地制宜地對成熟人工林進行間伐或輪伐，當前在該區域造林應避免營造針葉純林。
  5. Human intervention such as overgrazing resulted in a great decline in soil infiltration rates, which are an important reason for soil degradation and soil drought the experimental results showed that plant biomass and productivity increased significantly with the increase of soil infiltration rates

    人為活動干擾，如過度放牧壓實土壤和去除地表覆被造成土壤滲透性顯著降低，是林地土壤質量退化及土壤水分缺乏的重要誘因。試驗結果表明，植物生物量和生產力隨土壤滲透速率的增大而顯著提高。
  6. The result of analysis shows that the convective heat flux has main effect on fuel pyrolyzing and vaporizing, the liquid layer of pe fuel can increase the regression rate but also can cause unstable burning. 4

    研究結果表明：對流熱流是引起燃料熱解氣化的主要因素， pe熔化產生的液體層提高了燃料熱解退移速率，但液體層厚度增加到一定程度時，對發動機工作穩定性有負面影響。
  7. Yanchang 4 + 5 sector to yanchang 3 sector lithofacies palaeogeography pattern was stable, because the constitution background was steady, and the source direction had no change, and supply was abundant. in those sectors the basin development was in lake retreat, and in the period of extinction gradually, and formatted construction delta deposit, but in yanchang 33 period the sedimentary speed were greater than construction speed, showing that overriding river mouth bars were abundant

    長4 + 5 ?長3期湖盆發展處于湖退、萎縮逐漸消亡時期，由於構造背景穩定，物源來源方向沒有變化，物源供給充分，所以巖相古地理格局基本一致，形成建設性三角洲沉積，但長3 ~ 3期沉積速率大於構造沉降速率，表現為疊置河口砂壩極其發育。
  8. Combining with the energy fluxes balance above fuel surface, the simulation and calculation of transient heat conduction of the pe fuel with liquid layer while melting and pyrolyzing are considered by use of the moving coordinates. the calculated regression rate of the pe fuel approximately tallies with the same kind of hybrid rocket motor test data from the abroad

    建立了pe燃料的熔化、熱解、導熱模型，應用動坐標系，結合燃料表面熱環境，對具有液體層的pe燃料的熔化、熱解和內部瞬態導熱過程進行了模擬計算，計算的pe燃料退移速率與國外同類試驗的測量結果符合較好。
  9. Prepared technical parameters were optimized by l9 ( 34 ) experiment analysis. a unique method for cleaning and drying of substrate - cleaning used by scour, drying used by infrared light was fished out by large numbers of experiment. chemical mechnism of zno thin film prepared by sol - gel technique was discussed by dta for the first time. by the measurements of sem, xrd and uvs, the thin film was analysed. the result proved that the thin film with strongly preferred orientation of c - axis perpendicular to the substrate surface which surface was homogenous, dense and crackfree was the crystalline phase of hexagonal wurtzite. the thin film was composed of plentiful asteroidal crystal which crystal dimension approximately 10 30nm. the average transmittance of thin film in visible region was above 90 %. the results of measurements else also proved that the thickness of single dip - coating was 75 240nm, this films resistivity was found to be 3. 105 102 3. 96 105 ? cm. the thickness and resistivity of thin film influenced by dope - content, withdrawal speed, pre - heat - treatment, anealing were reseached respectively

    利用xrd 、 sem以及uvs光譜儀等分析方法對薄膜進行了研究，結果顯示，所制備的薄膜為六方纖鋅礦型結構，具有高c軸擇優取向性；表面均勻、緻密，薄膜材料由許多星狀晶粒組成，晶粒尺寸大約為10 - 30nm左右；薄膜可見光透過率平均可達90 % ；對薄膜厚度以及電學性能進行了測定后發現：單次鍍膜厚度約為75 - 240nm ， al ~ （ 3 + ）離子摻雜型氧化鋅薄膜的電阻率在3 . 015 102 - 3 . 96 103 ? cm范圍內；分別研究了摻雜濃度、提拉速度、預燒溫度、退火溫度等工藝參數對薄膜厚度和電阻率的影響。
  10. Both hydrogen plasma and sinx thin film can effectively enhance the short circuit current density of mono and poly silicon solar cells, which cause the improvement of the absolute transfer efficiency about 0. 5 % ~ 2. 9 %. depositing sinx thin film followed by hydrogen plasma treatment will result in better passivation effect. the thickness of sinx thin film will decrease and the refractive index will increase after annealing

    經過薄膜後退火處理發現，氮化硅薄膜經熱處理后厚度降低，折射率升高，但溫度達到1000oc時折射率急劇降低；沉積氨化硅薄膜后400oc退火可以促進氫擴散，提高鈍化效果；超過400oc后氫開始逸失，晶體硅材料中的少子壽命急劇下降； rtp （快速熱處理）處理所導致氫的逸失比常規退火處理顯著。
  11. In this disseytation, we present a new algorithm of view - dependent multiresolution terrain simplification based on adaptive quadtrees. especially, we discuss these main problems in multiresolotion terrain rendering such as levels of detail mesh generation, vedex evaluating and er

    最後，將該演算法應用於dem地形模型簡化中，簡化前的地形繪制幀速率為4fps ，簡化后的地形繪制幀速率為70fps左右，在繪制圖象質量沒有明顯退化的前提下，能滿足視覺和實時劃覽的需要。
  12. The reasons for higher oxidizer flow rate, lower fuel regression rate and lower motor performance in both hot firings are discussed. several necessary improvements for the test system are suggested. 6

    通過對兩臺發動機試驗結果的分析，找出了試驗中氧化劑流量偏高、燃料退移速率和發動機性能偏低的原因，並提出了具體的改進措施。
  13. The results of research indicate that the pressure, the thrust and the fuel regression rate of the motor decrease while the o / f ratio increasing with the burning time lasting. the special impulse reduces when throttling

    研究結果表明：壓強、推力和燃料退移速率隨發動機工作時間增加而降低，氧化劑和燃料的配比升高；節流時，發動機比沖降低。
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