退化根 的英文怎麼說
中文拼音 [tuìhuàgēn]
退化根
英文
reduced root-
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。Similarly, although at least some cetaceans have taste buds, the nerves serving these have degenerated or are rudimentary
相同的，盡管至少一些鯨魚還有味蕾，但服務的神經已經退化或根本未發育。Soil is the base of agriculture production, the key measure to prevent water and soil loss is to conserve soil, but most soil nutrient is lost with the sediment loss, and serious water and soil loss make the soil thickness degrease, the soil nutrient be deficient and lean, the land quality degrade and the yield of plant decrease, all this results is going to threaten the people ' s transplanting and the agriculture sustainable development, and restrict the economy development of three gorges regions
同時，土壤是農業生產的根本，治理水土流失的關鍵是要保住土壤，而土壤養分絕大部分是隨著泥沙流失的，嚴重的水土流失造成土層淺簿、養分貧瘠，土地質量退化，產量下降，對三峽庫區移民工作和農業可持續發展造成嚴重威脅，制約三峽庫區經濟發展。因此進行三峽庫區坡耕地土壤侵蝕機理研究，探索減輕坡耕地土壤流失的方法措施，具有全局性的重大意義。42 trees are obtained and the 13th is most acceptable. the results show that the evolutionary inclination of forewing and hindwing of empoascini is that the forewing evolved from these whose veins of mp " are derived from cell r, to these whose mp " from cell m, and the most advanced taxa include these whose 3 distal veins are derived from cell m. the hindwing are evolved from these whose cua is branched and the mp " + cua " is presented, to those whose cua is unbranched and mp " + cua " disappeared, based on the above analysis, the genera of empoascini can be divided into two groups : one group includes these whose mp " + cua " are present, the other consists of those whose mp " + cua " are disappeared
在系統發育方面，應用hennig86 （ version1 . 5 ）軟體，根據中國小綠葉蟬族40個屬及外群dikraneura ，首次研究了該族的系統發育關系，根據研究結果初步提出了該族前、后翅脈的進化方向，即該族前翅翅脈呈現出mp脈源於r室，逐漸進化到mp脈源於m室，最後前翅3條端脈皆源於m室的趨勢；后翅翅脈由cua脈端部分二叉，進化到后翅cua脈端部不分叉、 mp + cua脈退化的趨勢。Hydrophytes show certain adaptations to such habitats, notably development of aerenchyma, reduction of cuticle, root system, and mechanical and vascular tissues, and divided leaves
水生植物表現出適應水生的特性：具有發達的通氣組織；表皮、根系、機械組織、維管組織退化；葉片分裂；葉片、根和莖中均具有通氣道或氣腔。Based on the project imbrued especially by hunan province construction office, the study of this paper includes four parts as follows : the first part does some simplify on the characters of the rc material under high temperature. after transferring the rc section under fire to equivalent one at normal temperature based on the stiffness and intensity equivalent, the rc members under fire can be calculated as ones at normal temperature
主要研究內容如下: （ 1 ）基於剛度等效或強度等效原則，根據截面各點材料力學性能的退化，把受火鋼筋混凝土非均勻截面等效成常溫下的鋼筋混凝土截面，使得高溫下構件剛度和強度的計算可按常溫下的計算理論進行。Fungi form mycorrhizae in plant roots and the hyphae take in carbon from plants through their epidermal cells and move mineral nutrients and water from soil to their epidermal cells ; this symbiosis is of high importance in studying biodiversity conservation, the origins and evolution of terrestrial plant, the rehabilitation and reconstruction of degenerated ecosystems, agriculture, horticulture and forestry
真菌在植物根系形成菌根后，菌絲通過根的皮層細胞獲取植物提供的碳源，同時將礦物營養和水從土壤轉運到皮層細胞，這種共生過程的研究在生物多樣性的保護、陸生植物的起源與演化、退化生態系統的修復與重建以及農業、林業和園藝業的應用具有重要的意義。Based on the principles of restoration ecology and main aim of karst vegetation restoration at present, take huajiang canyon with a typical degraded vegetation area located in southwest guizhou as an example, we study bio - ecological features of the volunteer plants with some economic values and the soil environment, for the purpose of making some models of the pioneer plants to popularize
根據恢復生態學原理和喀斯特區植被恢復的目標，以位於貴州省西南部的典型喀斯特植被退化區花江峽谷為例，通過研究該區具一定經濟價值和推廣價值的先鋒植物的生物生態學特徵和土壤環境，研究適于推廣應用的先鋒植物群落模式。Incomplete visual recovery after cataract surgery was due to ( 1 ) refractive error ( incorrect or no glasses ), ( 2 ) armd, ( 3 ) glaucoma and ( 4 ) posterior capsule opacity ( or after - cataract )
至於手術后視力未能完全恢復的原因，一般為屈光不正（如眼鏡度數有誤或根本沒有配戴眼鏡） 、老年性黃斑退化、青光眼及晶體后囊膜混濁（繼發性白內障） 。According to the load behavior and defection degrees of existed reinforced concrete bridge, the calculating modeles for normal section strength and bearing capacity for reinforced concrete bridge are established by the elasticity analysis and nonlinear analysis of grade stiffness degeneration
根據既有鋼筋混凝土橋梁的受力特點和損傷程度，採用兩種方法：即《規范》法分析理論和分級剛度退化非線性分析理論，分別建立了既有鋼筋混凝土橋梁正截面強度計算和承載能力評定的計算分析模型。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。A lot of areas have already become the fragile district of the ecology. the mesoscale ( mm5v3 - 5 ) model was used to simulate the change of temperature, heat flux by means of changing landuse according to the survey data about the land degradation and renewing in the west of liaoning, which used data in june, july and august, 2001
本文利用中尺度模式（ mm5v3 - 5 ） ，選擇2001年6 、 7 、 8月份的資料，根據遼西地區土地退化的有關調查材料，對模式中的下墊面狀況（ landuse ）進行改變，模擬植被退化和恢復后，遼西地區的溫度、熱通量變化。In the artificial - planting, the strain of cordyceps militaris is easy to degenerate. at present, the study about the fungus in cordyceps genus are just in the identification of fungi 、 the nutrition analysis 、 the using in medicine and artificial - planting. although, it could reduce the lost by the usual breeding way, we could not solve the problem at basic. about the degeneration of strain, people mostly use the gender - cycling 、 the fusing - cytoplasmic technology and the genetic - engineering method to reform the strain. most of people use moleculor method in the study of relationships among the species and between the species
用常規選育方法雖然能減少一定的損失，但不能從根本上解決菌種退化這一長期困擾企業生產的問題。針對菌種退化問題，主要是利用有性循環、原生質體融合和遺傳工程等途徑進行菌株改良，應用分子生物學手段只是研究種內、種間的系統關系等，而關于菌種退化遺傳機理的研究尚未見報道。菌種退化是菌類栽培過程中普遍存在的，也是生產當中迫切希望得到解決的問題。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In order to investigate the effect of high - field hot - carrier on devices and circuits, the electrical stress experiment is carried out with 1. 2 n m, 1. 0 n m and 0. 8 u m channel length home - made mosfet ' s by the monitor system with ate and cat technology. by using the fresh and degraded experiment data, bsim2 model parameters are extracted
為了分析研究高場熱載流子效應對器件和電路特性可靠性的影響，採用自動測試與cad技術相結合的監測系統，對國內溝道長度1 . 2 m 、 1 . 0 m和0 . 8 m的mosfet進行了電應力退化實驗，並根據實驗結果提取了退化前後器件的bsim2模型參數。In addition, the pith of root and stem is flourishing for prosperous growth period and declining period, the vascular tissue storing the nutrient and providing the nourishment for the biennial plant in next year from abnormal secondary growth is developing in pith, unusual structure eg. epidermis and vice - epidermis, bubble form cell, short pipe numerators and wreath grid types leaf etc. in each organ of pugionium comutum ( l. ) gaertn. had been formed to adapt to dry environment, so the characteristics on appearance and anatomies in pugionium cornutum ( l ) gaertn. has closely of relation with its anti - drought and its adapting to desert environment
此外，葉片旺盛生長期、衰退期根莖具發達的髓，髓內有異常次生生長形成的維管組織，貯藏養分，為沙芥次年形成二年生植株提供營養，沙芥各器官在解剖結構方面都形成了特化結構如具表皮及副表皮、泡狀細胞、短的導管分子及環柵型葉等以適應乾旱的環境，因此沙芥各器官的形態及解剖特點與其抗旱、適應沙漠環境有密切的關系。Due to irrational land utilization, absurd assarting and herding, a series of environmental problems, such as sandy soil, grassland degeneration, soil and water loss, appeared, which severely threatened to survival and development of human being. it was proved that biomic - measure was the radical measure of ecology environment construction and harnessing. thus, a research on choosing a kind of grass, which was good, stronger stress resistance and faster growth velocity, was carried out
黃土高原半乾旱區多年來由於不合理的土地利用和濫墾濫牧等現象，致使土壤沙化，草地退化，水土流失等一系列生態環境問題嚴重威脅著人類的生存與發展，多年的研究已證明，生物措施是生態環境建設與治理的根本性措施，因此，針對目前的自然現狀，選擇抗逆性強、生長快、生產中急需的優良牧草進行了定位試驗研究。In original and jamming slightly vegetation, because dead roots, branch and leaves back to soil, soil organic matter higher, soil available phosphorus higher, too ; chemical and physical characters of soil were stabilization. the reason were original vegetation have more species and structure of community was stable. the degradation of fertility and structure of soil in secondary vegetation was influenced by change with structure and form of community
在人為干擾小的原生性森林，植物種類豐富，群落結構穩定，植物死根系和枯枝落葉全部回歸土壤，土壤有機質含量高，養分呈有機態為多，故有效磷較高，土壤理化性質較穩定；次生植被群落土壤結構和肥力的退化是由於群落組成和結構的改變導致枯枝落葉成分和土壤發規白山地還小問沙消民俗一非定俗地征王卿喬忡旺w比收財育環境差異而引起，次生植被土壤的退化狀態隨植被退化程度不同而有差異。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。( 2 ) based on deterioration model of owerage bond stress of beam reinforcement accounting for effect of axial compression ration and number of displacement loops, and stress - strain relationship of the concrete in the joint core accounting for effects of both softening and confinement, the modified compression field theory was employed to simulate behavior of the joint core under loading reversals. analysis by means of the program jap on the tested specimens in this paper and those obtained from other researchers produced consistent results
根據本文建立的考慮軸壓比和位移循環次數影響的梁筋平均粘結應力退化模型和考慮軟化效應、約束效應的核心區混凝土應力應變關系，通過在試驗中得出的節點核心區混凝土、箍筋、節點正面、背面柱筋在反復荷載下的受力特點，利用斜壓場理論模擬節點核心區在反復受力過程中的受力狀態。分享友人