行退化 的英文怎麼說
中文拼音 [hángtuìhuà]
行退化
英文
row degradation-
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。That ' s why no reptile degenerates to a bluegreen alga
為什麼中間沒有發生過爬行動物又退化回藍藻的現象？Based on the science of human settlements, the theory of urban growth, the theory of urban - rural integration and the theory of sustainable development, this paper proceeded with the prominent contradiction between urban growth and cave - dwellings " degeneration. after analyzing general situation and regional feature of qingyang, the actualities of cave dwellings were evaluated in the first place which including cave dwellings " history, basic style, regional feature, green principle, culture connotation, as well as traditional cave dwellings " shortage and developing dilemma
本研究從城鎮增長和窯居退化這一突出矛盾入手，依據人居環境理論、城鎮增長理論、城鄉一體化理論、可持續發展理論，在分析慶陽概況與區域特徵的基礎上，首先對慶陽窯洞民居的發展現狀進行了評價，包括窯洞民居的歷史沿革、基本類型、地域特色、綠色理念、聚落景觀、文化內涵以及傳統窯居的局限性和目前發展的困境。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。The immature mice were also used to see the expression and regulation of stat3 by gonadotrophin treatment. additionally, the expression and regulation of stat3 were examined during the formation and regression of corpus luteum
此外，還研究了促性腺激素對性未成熟小鼠子宮中stat3表達和激活的調節，並對stat3在小鼠黃體形成和退化過程中的作用進行了研究。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。By carrying out the experiment of five pieces of brick masonry walls with pilaster under low reversed cyclic loading, including four pieces strengthened with gfs and one piece un - strengthened, the seismic performance, such as the hysteretic behavior, rigidity degradations deformation and energy - dissipation, are studied systematically
摘要通過1片未加固磚墻體和4片玻璃纖維布加固磚墻體抗震性能的試驗，對墻體的滯回特性、剛度退化性能、變形性能及耗能性能進行系統分析。Putting forward to the clear and definite concept and principia in proseminar ", the sustained land management evaluation in developing country ", and " the sustained land management ( using ) hi 21st century " point out : the land using is to combine the technique, policy with the social economic principle and the incorporated behavior of circumstance relation, in order to attain the keeping or increasing production or services at the same time, lowering the production risk, keeping nature resources potential and preventing the soil degeneration, making its have the economic vitality and accepted by the social
土地資源的可持續利用是可持續發展的基礎，沒有土地資源的可持續利用就不可能有可持續發展。 1991年9月在泰國清邁舉行的「發展中國家持續土地管理評價」研討會和1993年6月在加拿大舉行的「 21世紀持續土地管理（利用） 」國際會議上提出了持續土地利用的明確概念和基本原則：指出可持續土地利用是將技術、政策和旨在使社會經濟原理與環境關系一體化行為結合起來，以便同時達到保持或提高生產或服務，降低生產風險，保持自然資源潛力和防止土壤退化，使其具有經濟活力和被社會所接受。The wings of the chicken have become vestigial ; it can no longer fly.
雞的翅膀逐漸退化，不會在空中飛行了。The causes of devolution, desertation, salinization and solonization were analysed in two aspects : it is apparently due to overpopulation, overstocking, unreasonably using, lacking of new technique, frequent occurrence of nature disaster, small area and low output of artificial pasture and semi - artificial pasture, but the more deeply reason was that the function of grassland was not completely understood only emphasizing the economic efficiency and regrowthful resource in grassland while the ecological efficiency and its potential use were neglected
本文主要從兩方面對草原三化進行了分析，首先從表面上看有以下幾方面原因，人口多、牲畜數量多、草原利用不合理、新技術推廣差、草原自然災害頻繁、人工半人工草地少產量低。其次又挖掘了草原退化的深層原因，第一對草原資源的功能和作用的認識具有片面性，只重視草原的經濟效益，卻忽略了它的生態效益；只重視草原資源的再生性，卻忽略了它的適宜可利用性。In this thesis, four types of steel beam - rectangular cfst column connections, including normal welded flange plate ( wfp ) connection, bolted flange plate ( bfp ) connection, stiffened end plate ( sep ) connection and double split - tee plate ( dst ) connection, were designed based on the configuration of steel frame connection. total 8 models, 2 models of each kind of connections were tested under low - reversed cyclic loading at the end of cfst columns. the relationships between force and displacement at the end of columns, the relationships between the moment and rotation of the joints, degradations of strength and stiffness, ductility, failure mechanism and failure characteristics of these four connections under different axial - compression ratios were presented
本文借鑒鋼框架節點構造，設計了四種類型矩形鋼管混凝土柱與鋼梁連接節點，包括常規栓焊（ wfp ）節點、翼緣全螺栓連接（ bfp ）節點、雙t板連接（ dst ）節點以及加勁端板連接（ sep ）節點，進行了四類節點8個模型試件在柱端低周反復荷載作用下的抗震性能試驗研究，比較了不同軸壓比下節點的滯回性能、強度與剛度退化、延性、破壞機理與破壞特徵，主要結論有： 1 、節點的位移滯回曲線與轉角滯回曲線為塊型分佈，沒有或略有捏攏現象，耗能能力強； 2 、軸壓比對節點滯回曲線有顯著影響，全部節點都有顯著的剛度退化； 3 、位移與轉角骨架曲線在峰值荷載後有較長的水平或下降段，具有良好的延性性能； 4 、從整體抗震性能上看，翼緣全螺栓連接節點、雙t板連接與加勁端板連接節點都優于常規栓焊節點，可在實際工程中加以推廣。The child, facing stress of hospitalization, used coping behaviors that included regression and escapism
學齡前期的兒童，面對住院壓力最易產生退化、逃避等因應行為。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。Based on measurement of strains of both horizontal stirrups in the joint core and longitudinal reinforcement passing througth the joint, in different stages, transfer mechanism and factors affacting seismic behavior of the joint, were analysed. under different shear compression ration, effect of axial force ratio on seismic behawior of the joint was also evaluated, static shear and seismic shear of the joint based on capacity design were investigated. on this basis, new governing criteria and conditions of seismic behavior of the joint were put forward
通過對節點區水平箍筋以及貫穿節點梁、柱縱筋在不同受力階段應變的精細量測，對節點的傳力機理以及影響抗震性能的因素進行了分析研究；對不同剪壓比條件下軸壓比對節點抗震性能的影響規律進行了分析研究；對不同受力階段梁筋的粘結退化規律以及節點區的剪切變形進行了分析研究；對節點的靜力抗剪與建立在能力設計思路上的抗震抗剪問題進行了深入研究，提出了建立在新思路基礎上的節點抗震性能控制準則和控制條件。On may 3, invited by the institutes deputy directors liu xiaobing and hu naizhe, dr. mclaughlin visited the experimental park in harbin and the black soil ecological experiment station in hailun. with deputy director liu xiaobing and the research fellow zhang xingyi, he had an in - depth discussion of some issues of common interest to both sides, like the deterioration and management of black soil, conservation farming, compacting of soil
5月3日， neil博士應劉曉冰副所長和胡乃哲副所長的邀請，訪問了我所哈爾濱園區以及海倫黑土生態實驗站，與劉副所長張興義研究員等圍繞黑土退化與管理保護性耕作土壤壓實等雙方感興趣的問題進行了深入的交流。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In the paper, a series of the field investigation, laboratory culture and pot experiments were conducted, to study microbial eco - characteristic and restoration in relation to soil - plant system of red soils reclaimed - mine. the main results were summarized as below : 1. soil microbes eco - characteristic in lipu copper mining reclaimed soil - endurance plant system were studied comparatively, zhe jiang province
本論文採用野外礦區調查、實驗室培養和溫室盆栽試驗相結合的方法，對我國南方紅壤礦區土壤的微生物生態特徵及其穩定性恢復進行了研究，以期為礦區重金屬污染及退化土壤微生物生態系統的生物修復及土壤復墾工程提供理論技術依據。The goal of the programme of action is to address the significant impacts on human health, poverty alleviation and food security caused by the continued degradation of the coastal and marine environment through land - based activities
該行動方案的目標是針對沿海和海洋環境受陸基活動影響造成持續退化對人類健康、減緩貧窮和糧食安全所產生的重大影響。It is designed a contrast experiment on two sets of two - span and two - story rc frames under low cycle reversed loading, one frame has construction joints while the other has not
摘要對一組留置施工縫，一組未留置施工縫的兩組單榀兩層兩跨框架結構進行了低周反復荷載作用下的試驗研究，對兩組框架的滯回性能、延性、剛度退化等性能作了深入的分析。Wuxi county is located in typically fragile ecological strip - - three gorges reservoir area and belongs to national ecological environment construction key region. based on soil and water conservation project in wuxi county this article designs the landscape health assessment system and analyses health classes of degraded ecosystem by applying fuzzy ahp method, discloses degraded characteristics in aspect of land use patterns in wuxi county contrasted with bishan county, puts forward ecological restoration models combined with soil and water conservation harnessing, analyses and compares soil fertility quality in biological communities of different ecological restoration succession phases and restoration measures
本論文依託巫溪縣水土保持生態修復項目，運用模糊層次分析方法，進行退化生態系統的景觀健康評價體系設計與健康等級分析；通過對比研究巫溪縣與另一個生態修復試點縣? ?璧山縣的土地景觀空間格局分析，揭示巫溪縣土地利用格局上的退化特徵；提出與水土保持治理相結合起來的生態恢復模式；引用土壤肥力質量指數，對生態修復區不同生態恢復演替階段群落及不同時期坡改梯、休耕地與封山育林三項生態修復措施的土壤肥力質量分析與對比。分享友人