退化集 的英文怎麼說

中文拼音 [tuìhuàjí]
退化集 英文
degenerate set
  • 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...
  • 集 : gatherassemblecollect
  • 退化 : become vestigial; degenerate; deteriorate; retrograde; devolution; retrogradation; retrogression;...
  1. So these karst series problems are lowness ability of making soils, distributing odds of surface water and groundwater, leakiness of fountain, alkalescence of circumstance, lowness of bio - diversity, rapidness converse succession of vegetation and fragility of soil character and entironment. and karst region produces many problems, e. g. rock desert, soil erosion and degeneration because of artificial influence and destruction

    巖溶空間介質具有地上地下雙層結構，可溶巖造壤能力低，巖溶水空間分佈不均、地表地下水關系密切、水源易漏失，偏堿性環境、生物資源集聚程度低，植被逆向演替快、順向演替難，巖溶地質與生態環境十分脆弱，受到人為因素的影響和破壞，極易產生石漠化、土壤侵蝕與退化等一系列問題。
  2. The research of soil degradation in pur country is mainly concentrated on the red earth hilly area in the south in the past, and is less on the loess plateau that is one of the most fragile areas. based on field experiment and laboratory analysis, discuses the degradation mechanism, and raises the methods of refreshing and reestablishing land productivity of huangshan soil in chunhua county of shaanxi. in the hope of serving development of western regions and ecological environment construction that concede the land to forestry ( the grass )

    我國以前對土壤退化問題的研究主要集中於南方紅壤丘陵區，對生態環境最脆弱的黃土高原地區的土壤退化研究相對較少，故本文以黃土高原地區陜西淳化縣的侵蝕性黃?土為對象，通過野外人工模擬降雨試驗和室內分析相結合的方法，探討了侵蝕性黃?土的退化機理，提出了恢復和重建黃?土土地生產力的途徑和方法，以期服務于西部大開發和退耕還林（草）的生態環境建設。
  3. In light of current using situation and drawing on the experience of many scholars researched methods and viewpoints, this thesis made com land, fallow land, orchard, grass land as experimental field in black soil region jlau, which carried out experiment by applying different amounts of n and p fertilization in corn field. by means of collecting the samples of rainfall runoff, erosion silt and surface layer soil before and after rainfall for one year nature precipitation in field, we study the effect of surface runoff on n and p nutrient and fertility degeneration. the results showed : ( l ) there are lots of factors which affect soil erosion and losses of n and p, in which rainfall and rainfall intensity were more important, while rainfall intensity is the most important meteorological phenomena factor

    針對當前黑土利用現狀，本文借鑒眾多學者的研究方法和觀點，在吉林農大黑土區選擇利用方式不同的玉米地、休閑地、果園、草地，在玉米區進行了不同數量的施肥，通過野外試驗，採集一年自然降雨產流及泥沙樣品，同時採集降雨前後的耕層土壤樣品，研究了黑土區地表徑流對氮磷養分特徵及肥力退化的影響，結果表明：土壤侵蝕和氮磷的流失受諸多因素的影響，降雨量、降雨強度是重要因子，而降雨強度是影響農田地表徑流養分流失的最重要的氣象因子，特別是暴雨，暴雨徑流中氮磷濃度較平時高得多；隨作物生長，覆蓋度逐漸增加以及不同利用方式下表現的覆蓋度差異，氮磷流失都表現為顯著的差異。
  4. Recently, more attention has been given to researches on mechanisms of the formation and evolution, and spatio - temporal variation of soil degradation under highly - intensified agriculture, and countermeasures for its control and rehabilitation of degraded soil

    目前，應當高度重視集約農業利用下土壤退化的形成與演變機理、時空分異規律、以及土壤退化的控制和退化土壤的恢復重建措施的研究。
  5. Due to the influence of climate drought and human activities, the ecological environment of qinghai province is in an increasingly grave condition, namely, climate abnormal events occurring frequently, grassland degenerating, ground sanding, glacier shrinking, water level of lakes descending and river runoff decreasing, and so on. in the basis of extensively collecting and analyzing the data of qinghai ecological environmental factors such as climate, water resource and grassland resource etc., the further basic research is performed on the ecological environment characters of main climate factors, surface runoff, water resource, lcc and their correlation to coordinate with the basic, strategic and precursory research for the development of china west part and provide the scientific foundation for corresponding development both ecological environment and social economy, and persistent utilization of natural environment resource

    本研究針對當前在氣候乾旱化和人類活動的共同影響下青海省生態環境中氣候異常事件即氣象災害頻繁發生、草場退化、土地沙化、冰川萎縮、湖泊水位下降和河流流量減少等生態環境退化現象日益嚴重的實際，在廣泛收集和整理青海省氣候、水資源、草地資源等生態環境因子基礎資料的基礎上，對青海的主要氣候要素、地表徑流、水資源、植被的演替及其相互間的關系等主要生態環境變化特徵進行了基礎性的研究。
  6. The main contributions of the second part of this dissertation are focused on the cryptographic properties of logical functions over finite field, with the help of the properties of trace functions, and that of p - polynomials, as well as the permutation theory over finite field : the new definition of chrestenson linear spectrum is given and the relation between the new chrestenson linear spectrum and the chrestenson cyclic spectrum is presented, followed by the inverse formula of logical function over finite field ; the distribution for linear structures of the logical functions over finite field is discussed and the complete construction of logical functions taking on all vectors as linear structures is suggested, which leads to the conception of the extended affine functions over finite field, whose cryptographic properties is similar to that of the affine functions over field gf ( 2 ) and prime field fp ; the relationship between the degeneration of logical functions and the linear structures, the degeneration of logical functions and the support of chrestenson spectrum, as well as the relation between the nonlinearity and the linear structures are discussed ; using the relation of the logical functions over finite field and the vector logical functions over its prime field, we reveal the relationship between the perfect nonlinear functions over finite field and the vector generalized bent functions over its prime field ; the existence or not of the perfect nonlinear functions with any variables over any finite fields is offered, and some methods are proposed to construct the perfect nonlinear functions by using the balanced p - polynomials over finite field

    重新定義了有限域上邏輯函數的chrestenson線性譜，考察了新定義的chrestenson線性譜和原來的chrestenson循環譜的關系，並利用一組對偶基給出了有限域上邏輯函數的反演公式；給出了有限域上隨機變量聯合分佈的分解式，並利用隨機變量聯合分佈的分解式對有限域上邏輯函數的密碼性質進行了研究；給出了有限域上邏輯函數與相應素域上向量邏輯函數的關系，探討了它們之間密碼性質的聯系，如平衡性，相關免疫性，擴散性，線性結構以及非線性度等；討論了有限域上邏輯函數各類線性結構之間的關系，並給出了任意點都是線性結構的邏輯函數的全部構造，由此引出了有限域上的「泛仿射函數」的概念；考察了有限域上邏輯函數的退化性與線性結構的關系、退化性與chrestenson譜支集的關系；給出了有限域邏輯函數非線性度的定義，利用有限域上邏輯函數的非線性度與相應素域上向量邏輯函數非線性度的關系，考察了有限域上邏輯函數的非線性度與線性結構的關系；利用有限域上邏輯函數與相信息工程大學博士學位論文應素域上向量邏輯函數的關系，揭示了有限域上的廣義bent函數與相應素域上的廣義bent函數的關系，以及有限域上的完全非線性函數與相應素域上向量廣義bent函數之間的關系;給出了任意有限域上任意。
  7. Furthermore, the fractal properties of the level sets and inverse image of compact sets of n - dimension non - degenerate diffusion processes is also considered by professor yang in [ 2 ], and some new results are obtained in this paper

    另外，楊新建教授在文獻[ 2 ]中研究了緊集上非退化擴散過程樣本的水平集和逆像集的一些分形性質，本文在這方面也做了一些工作。
  8. The research of ecosystem degradation, restoration and reconstruction in these reg ions has became one of the hot points in soil science, water and soil conservati on science and ecology

    研究主要集中於：紅壤區土地退化的成因、過程、機理及退化特徵的診斷與評價研究，而且其評價由單一方面如植被、土壤轉向包括環境劣化、形態退化、肥力退化、污染退化等多方面的綜合評價。
  9. Futhermore, we studied that the hausdorff dimension of its inverse image set

    進一步，研究了非退化擴散過程的樣本軌道的逆像集的hausdorff維數。
  10. With the moisture data gathered in demonstration district 3 years, combining local rainfall information and materials, the operation recovery mechanism of soil moisture in semi - arid degraded mountain area by different ecological recovery and reconstruction measures is analyzed

    摘要通過示範區3年採集的水分數據，結合當地的降雨資料和氣象資料，對比分析了半乾旱退化山區在不同生態恢復與重建措施下土壤水分的運行恢復機制。
  11. Agricultural intensification plays an important role in stabilizing the food production in china, while bringing about an increasing negative impact on the soil and eco - environment as a result of the long - term highly - intensive land use and agricultural chemical overuse, thus leading to degradation of soil physical, chemical and biological properties, which are demonstrated as soil nutrient imbalance, soil acidification, pollutant accumulation, and biodiversity deterioration and posing serious stress and threat to the ecosystem per se and the environment

    摘要集約化農業對保障我國糧食安全發揮了巨大的作用，但其長期的土地高強度利用和農用化學品過量投入的負面影響也日益顯現，導致的以土壤養分失衡、土壤酸化、有害物質積累、生物多樣性衰退等為主要表現形式的土壤物理、化學和生物學退化，給生態系統本身與環境都帶來了巨大壓力和嚴重威脅。
  12. Thus, it is believed that in subsequent high - temperature process, the base boron will outdiffuse very easily into emitter and collector, which will form a parasitic barrier for the electrons when moving from emitter into base and result in performance degradation of the device

    這樣在後續的高溫工藝中就會引起基區的雜質外擴到集電區和發射區，產生電子勢壘，導致器件性能的嚴重退化。
  13. First, we trained neural network by using different methods to deal with different data, to elevate the ability of detecting small intrusion and prevent neural network degeneration during training ; then, the improved genetic algorithm was used to optimize neural network ensemble weight

    首先通過有區別地對待不同的訓練數據訓練神經網路，提高對小類別入侵的檢測能力並防止網路訓練中的退化現象；然後利用一種新的改進遺傳演算法優化集成網路的權，提高系統整體性能。
  14. This function has been made obsolete by modern, industrialised society ; populations are now so dense that people pick up essential bacteria from each other, allowing gut organisms to regrow without help from the appendix, the researchers said

    現代的工業化社會已經使這個功能退化了；人口現在如此的密集，以至於人們相互感染必需菌，消化道微生物能夠在沒有闌尾幫助的情況下再生長，研究者說。
  15. The hausdorff and packing dimension of inverse image and level sets of n - dimension nondegenerate diffusion processes

    維非退化擴散過程樣本逆象集與水平集的分形性質
  16. There are some results " on the study of a n - dimensional nondegenerate diffusion process. in [ 1 ], for n 2, the hausdorff dimension of image set of its sample path is obtained, but for n = l, only its upper bound estimate ( see [ 2 ] )

    文[ 1 ]得到了n維（ n 2 ）非退化擴散過程樣本軌道的象集的hausdorff維數，而對n = 1時，只得到了其象集的hausdorff維數的一個上界估計（見[ 2 ] ） 。
  17. In every peak tourist season, tourists are so centralized on some tourism zones that traffic facility overload and the environment degradate seriously, which in turn lead to the tourism quality drops. meanwhile, some good tourism zones, with a large number of tourism resources unused, only have a little tourists, causing much resources waste

    近年來我國的旅遊業得到了迅速的發展，每到旅遊旺季，總有一部分旅遊區遊客過于集中、人滿為患、交通設施超載嚴重、環境嚴重退化，導致旅遊質量下降。而與此同時，一些質量不錯的旅遊溫冷點地區，卻有大量的旅遊資源閑置，造成了極大的資源浪費。
  18. The level sets and the polar sets for nondegenerate diffusion processes

    非退化擴散過程的水平集和極集
  19. In this paper, i will present some algorithms of polyhedral visual hull reconstruction : ( 1 ) polyhedral v isual h ull generation a igorithm b ased one dge - pool - searching, which constrains the 3 - d intersections into the 2 - d planes intersection via the epipolar theory to reduce the complexity a nd c an r educe t he t imes f or c ones t o b e p rejected o nto t he i mage p lanes, i n which we induced the index list to every points on the surface of object, and connected the related points to get sub polygons on surface and in turn get the mesh model, we replace triangulation process of disordered points cloud by edge - pool searching. ; ( 2 ) reconstruction based on degenerated - polygon - intersection, which have the following improvements on traditional bull intersection : using degenerated polygon to orga nize intersected area on cone face, which may be discontinuous ; a fast intersection algorithm of polygons on the cone face based on degenerated polygons, which is consistent between the continuous polygons and the discontinuous ones. the intersection of degenerated polygons is similar to the convergence of two ordered lists, which is comparably simple to the bull operation ; ( 3 ) reconstruction algorithm based on ray - tracing, in which all the rays that run through the vertex on silhouette of object will intersect with all the cones correspondent to other silhouette, and we have to calculate the intersection of all such line segments, the endpoints of which are considered to lie on the surface of object and we will get the point cloud on the surface of object

    同時利用共極線原理把三維計算投影到二維平面以降低求交計算的復雜度，該演算法可以減少光錐向圖像平面投影計算的次數，以邊池搜索取代散亂點集上進行的三角剖分； （ 2 ）基於退化多邊形求交的多面體可見殼模型重構，系統引入退化多邊形的概念，把錐體平面的交集中不連通的部分用一個退化多邊形來表示，並引入了新的基於退化多邊形的求交演算法，與傳統多面體可見殼重構相比，該演算法有以下幾點創新：在圖像平面以退化多邊形組織投影錐體和物體輪廓的交集，把任意錐面與物體輪廓的交集歸一到一個退化多邊形；基於退化多邊形的二維平面上多邊形快速相交演算法，該演算法在一定程度上就是兩個有序鏈表的合併，大大簡化了先前的布爾求交計算； （ 3 ）基於光線跟蹤的演算法，該演算法中所有通過輪廓頂點的光線和對應其它圖像輪廓的光錐進行求交計算，最後得到每次求交計算得到線段的交集，該線段的頂點就認為是物體表面點，從而得到物體表面的點雲。
  20. The disaster of drought and waterlog is severely and frequently, the water and soil loss and rock desertification is increasing, the subsidence is happened at some ground, the bio - diversity decrease, the vegetation and soil evolve conversely, the productivity declines, the people lives in difficulty, and the most phenomenon and types of ecological problem are concentrated in karst area. to strengthen studies on karst ecological characteristics and degradation types can provide gist for ecological rehabilitation and reconstruction in karst area, but also can provide means for reference for other ecology area

    嚴重而頻繁旱澇災害、水土流失、石漠化現象加劇、地面塌陷、生物多樣性喪失、植被與土壤出現逆向演替、生產力水平降低、人居生活困難等，集中了全球生態問題的主要表現和主要類型；因此，加強對巖溶區生態特徵和退化類型的研究，不但能為巖溶區生態的恢復和重建提供依據，也為其它生態區的研究提供方法借鑒。
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