退化率 的英文怎麼說
中文拼音 [tuìhuàlǜ]
退化率
英文
degradation rate-
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。In order to support export further, the state increased export refund ratio twice in a roll, increased export credit and loans and continued to expand the export right of production enterprises, reduced the charge standard for three kind of checks and port charges and simplified export procedure
為了進一步支持外貿出口， 1999年國家連續兩次提高出口退稅率，增加出口信貸，繼續擴大生產企業自營出口權，降低「三檢」和港口收費標準，簡化出口手續。How to control and check percentage of vermicular graphite was described, and some suggestions to prevent vermicularizing effect degeneration were offered
介紹如何控制、檢測蠕化率，並對如何防止蠕化衰退提出建議。For strained si pmosfets, the hole mobility is not only determined by the tensity of strain, but also related to the strain types, which are uniaxial compressive strain and biaxial tensile strain. when electric field is high enough, the hole mobility will be deteriorated in pmosfets under biaxial tensile strain, however, in the case of uniaxial compressive strain, the deterioration will never occur
經模型分析發現，應變硅pmosfet空穴遷移率與應力作用方式有如下關系:當橫向電場較高（ > 5 105v / cm ）時，雙軸張應力作用下的應變硅pmosfet的空穴遷移率將發生退化，而單軸壓應力器件則不會受到影響。Based on the hydrodynamic energy transport model, the influence of variation of negative junction depth caused by concave depth on the characteristics of deep - sub - micron pmosfet has been studied. the results are explained by the interior physical mechanism and compared with that caused by the source / drain depth. research results indicate that with the increase of negative junction depth ( due to the increase of groove depth ), the threshold voltage increases, the sub - threshold characteristics and the drain current driving capability degrade, and the hot carrier immunity becomes better in deep - sub - micron pmosfet. the short - channel - effect suppression and hot - carrier - effect immunity are better, while the degradation of drain current driving ability is smaller than those with the increase of depth of negative junction caused by source / drain junction shallow. so the variation of concave depth is of great advantage to improve the characteristics of grooved - gate mosfet
基於能量輸運模型對由凹槽深度改變引起的負結深的變化對深亞微米槽柵pmosfet性能的影響進行了分析，對所得結果從器件內部物理機制上進行了討論，最後與由漏源結深變化導致的負結深的改變對器件特性的影響進行了對比.研究結果表明隨著負結深（凹槽深度）的增大，槽柵器件的閾值電壓升高，亞閾斜率退化，漏極驅動能力減弱，器件短溝道效應的抑制更為有效，抗熱載流子性能的提高較大，且器件的漏極驅動能力的退化要比改變結深小.因此，改變槽深加大負結深更有利於器件性能的提高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。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。Severe fires can often cause changes in successional rates and soil hydrologic functions, degradation of soil physical properties, alter c : n ratios, and result in subsequent nutrient loss through accelerated erosion, leaching or denitrification, and alterations in microbial populations and associated process can occur
高強度火燒往往能引起演替頻率的改變，土壤物理性質退化，水文功能發生改變，改變c n比，加劇侵蝕、淋溶和反硝化作用，導致養分流火，微生物數量及其相關過程發生變化。The bridges will gradually wear down under the circumstances of the natural environment, such as the atmosphere erosion, the changes of the temperature and the humidity, and applied environment, such as the loading, the fatigue of the material and the structure
橋梁長期在自然環境（大氣腐蝕、溫度、濕度變化）和使用環境（荷載作用與頻率的增加、材料與結構的疲勞）的作用下，會出現逐漸退化的趨勢。In this thesis we mainly study degenerate - times integrated operater families and its applications to abstract cauchy problems, and we study the mean ergodicty theorems and the convergence rates of ergodic limits and approximation for k - regularized resolvent families
本文我們主要研究退化（ r ） -次積分預解運算元族及它對抽象cauchy問題的應用，並且研究k -正則預解運算元族的平均遍歷定理和遍歷極限的收斂率。Based on the study of strength degradation of material in the fatigue process, a strength degradation model is proposed. a stochastic differential equation, which controls strength degradation, is obtained from the model randomized by markov process. by using the theory of stochastic, the distributions of residual strength at any given lifetime and lifetime of any given residual strength are attained. under a few suitable hypotheses, inverse gaussian distribution of fatigue life is derived, and verified by means of experimental data. the result shows that the model and the method are reasonable
在研究疲勞過程中材料強度退化規律的基礎上，建立了一個強度退化模型.對其進行隨機化處理，得到控制強度退化過程的隨機微分方程.在一定假設條件下，獲得了剩餘強度概率密度函數的封閉解，並推導出疲勞壽命的反高斯分佈形式.給出一種考慮損傷狀態對隨機漲落影響的近似處理方法.與試驗數據的比較結果表明，本文的模型和方法是合理的The results showed that the microstructure of as - deposited tbdyfe ii 1ms were amorphous and the crystal of tbfe2 were found in films after annealing at 500. annealing films in vaccum could improve the saturation magnetization ms and the susceptibility, decrease the coercivity and the saturaion field, and make the direction of the magnetic moments parallel to the film plane
結果表明，制備態薄膜為非晶態結構，經過500真空退火熱處理后，薄膜出現了tbfe _ 2的結晶物，薄膜的矯頑力和外場的飽和磁場大大降低，飽和磁化強度增強，初始磁化率提高，易磁化軸轉向膜面。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。To completely avoid producing elements jointed at their corner nodes and checkerboard patterns, which frequently occur when the topology optimization of plane continuum is studied, the theory of topology analysis of plane continuum in topology optimization process and the simple algorithm for programming are studied. according to algebraic topology theory, the boundary of elements and plane continuum are operated as a one - dimensional complex. by use of the adjacency vector in graph theory, the structural topology is described and the topological operation is achieved on a computer. by above, the structural topological feature in the evolutionary process is gained. these methods are effcient and reliable. under topology constraints, according to the results of stress analysis, by deleting elements and moving nodes at the boundary, more satisfactory results can be gained by using a few numbers of elements and iterations. to demonstrate the efficiency of these methods, solutions including some well - known classical problems are presented
避免目前平面連續體結構拓撲優化過程中經常出現的單元鉸接以及「棋盤格」等現象，研究了連續體結構拓撲優化過程的拓撲分析方法，以及在計算機上實現的簡便演算法.根據代數拓撲理論，單元及連續體的邊界作為1 -復形進行運算.利用圖論中的鄰接向量概念，在計算機上實現了結構的拓撲描述及拓撲運算，得到了結構在拓撲演化過程中的拓撲特性，方法簡單、可靠.在一定的拓撲約束下，根據應力分析結果，採用刪除單元、單元退化、移動節點等方法，可以用較少單元得到更為滿意的結果，提高計算效率.為演示方法的有效性，給出幾個包括常見經典問題的解答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。In chapter five, let { xt, i 1 } be - mixing sequences with identical distributions, which belong to domain of normal attraction with non - generational and stable distribution. with probability one, we have limsup a. s
第五章，設x _ n ， n 1是同分佈-混合序列，其分佈屬于特徵指數為（ 0 2 ）的非退化穩定分佈的正則吸引場，證明了依概率1有Book publication industry plays an important role in accumulating chinais national heritage and passing on china ' s culture, but in recent ysare, there were some problems in this industry such as high rate of book returns and overstock of books
摘要我國出版業承擔著一個民族積淀、傳承文化的重要職責，但近幾年來圖書出版業卻呈現出高退貨率、高庫存積壓等問題。Consulting criterion and experts ’ experience the grade standards of indexes are listed, and applying grey correlation analysis method to calculate value of the indexes, of which the form is a serial data. the last, an actual bridge uses synthesis evaluation model, of which calculating result is the same as conclusion of the experts. so the bridge condition synthesis evaluation model of this dissertation is relatively in reason ; chapter 3 discusses defects of current bridge condition evaluation methods, and analyzes various factors, which bring bridge degeneration
參考《公路橋涵養護規范》中的分級標準進行評語量化，最後根據綜合評價模型進行實橋的評價，驗證本文所用方法的合理性;第三章，討論層次分析法建立橋梁評價模型存在的問題，分析影響橋梁退化的各種因素，並給出因素的模糊分級標準，運用模糊綜合評判方法估算橋梁平均退化率，以掌握橋梁的退化狀態，並舉例說明本方法的可行性;第四章，針對橋梁狀態評價具有信息不完全、關系不明確等灰色特性，以及目前我國橋梁管理部門儲備的橋梁數據資料較少的弱點，對橋梁狀態退化趨勢的預測採用灰色預測的方法，並給出了橋梁狀態的灰色馬爾可夫預測模型和非等時距灰色預測模型。Secondly after damage model of structure is analyzed and considering of rigid degradation in crossing section of structure, the damage index is defined by rotation rigid of element side and the model of damage of crossing section is developed. meantime, the damage model of structure is built by idea that damage index of elements endowed weight are added linearly
其次，在對現有的結構損傷模型分析之後，考慮到構件截面恢復力模型中卸載剛度的退化現象，作者基於構件端部截面的轉動剛度定義了構件的損傷指標，建立了構件層次上的損傷模型。同時考慮到結構損傷前後固有頻率的變化，運用線性加權求和的思想建立了結構層次上的損傷模型。All above supplies data and evidence for practical application or the revision of the light - weight concrete code
最後對剪力墻滯回特性、延性和剛度退化率作了分析，為工程實際中煤矸石砼剪力墻的應用提供了實驗依據。分享友人