退化系 的英文怎麼說
中文拼音 [tuìhuàxì]
退化系
英文
degenerated system-
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。In section 1, we give sufficient and necessary conditions for stability of the degernerate differential systems with delay ex ( t ) = ax ( t ) + bx ( t - r ), meanwhile, its complex lyapunov matrix equation is given as : wherez, this results can contain the results in [ 5 ] and [ 11 ] ; in section 2, we investigate the controability of a class of degernerate differential systems with delay
第三章中給出了對退化時滯系統一些研究結果，在第一節中討論了退化時滯微分系統的全時滯穩定性，闡述了系統全時滯穩定的充要條件，並給出了復lyapunov方程：其中，此結果可包容文獻[ 11 ]及文獻[ 5 ]中的結果。Relations between the signal - to - noise, sensibility, demagnetizing factor, output of fluxgate sensor with its diameter, thickness and turns of core are discussed in this paper. the author of this paper also concluded some basic principle for the designing of fluxgate sensor. the author designed and produced two dimension sensors to prove the possibility of the miniaturization of fluxgate sensor
本文還分析了小型化傳感器的實現可行性，分析了磁通門傳感器的信噪比、靈敏度、退磁系數、感應輸出與傳感器磁芯直徑、厚度和磁芯匝數的關系，論證了傳感器小型化的可行性，總結了在設計磁通門傳感器時所應遵循的基本原則，並且設計製作了兩種尺寸的傳感器，從實驗角度論證了傳感器小型化的可行性。An evaluating index system is established for degenerated estuarine ecosystem restoration
摘要建立了退化河口生態系統恢復評價指標體系。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。In typical watershed, quxi watershed, the result of external forcing, submerge and migrant, is the resource change of slope cultivated lands, economical forest, vegetation, water, habitant etc. of the ecosystem, and the changes of demand for food supplies, energy resource and education
移民區典型小流域? ?曲溪小流域，受淹沒、移民2個驅動力的作用，耕地、經濟林、植被、水、棲息地等資源發生了顯著變化，系統的糧食、能源、教育需求也隨之而變，在內在反饋機制的作用下，導致系統輸出為水土流失加劇、生物多樣性受到破壞、土地退化嚴重等。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。Along with development of mining in this region, abnormity of heavy - metal endogenetic geochemistry change to heavy - metal inchoative geochemistry, which lead to accumulation and diffusion of heavy metal in mine region of red soil and great red soil area, serious degradation of soil caused by heavy metal pollution, and mine ecological system destroy
隨著有色金屬采礦業的發展，重金屬的內生地球化學異常轉化向表生地球化學異常。由此，使紅壤礦區土壤乃至大面積紅壤中重金屬積累擴散，造成土壤重金屬污染退化加劇，生態系統遭受嚴重破壞。First, the generalized elastic theory is employed into in single pile analysis. the degeneration solution is accordant with poulos " results. analyzing the load - displacement behavior of the battered pile, the results agree well with meyerhof ' s model experiments and zhanglm ' s centrifuge experiments
對于直樁，退化為彈性理論的計算結果同poulos的結果一致，退化為荷載傳遞法與他人的結果基本吻合；然後研究了斜樁的荷載-變形特性，把公式用於計算meyerhof的模型試驗以及zhanglm的離心機試驗的荷載-位移關系，發現同試驗結果吻合較好。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。The humankind is troubled seriously by a series of environmental problems, such as air pollution, ozonosphere destruction, glasshouse effect, acid rain, water pollution, land pollution and soil erosion and so on. all of these will stop our economy developing
大氣污染、臭氧層破壞、溫室效應、酸雨頻繁、水污染、土地污染、水土流失、草原退化、森林急劇減少、珍稀動植物滅絕、沙漠急劇擴大等一系列環境問題嚴重困擾著人類，各種公害接二連三地侵襲人類，再這樣下去，經濟將變成無源之水、無本之木。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。The study of different deteriorated grasslands showed, although occurring genetic differentiation and reduced genetic diversity, biodiversity in deteriorated population can still maintain a high level. additionally, it had gene exchanges with normal populations. the deteriorated grassland can restore its vegetation as normal if rational management was adopted
不同退化系列，克氏針茅種群雖發生了遺傳分化，遺傳多樣性略有降低但仍維持較高的水平，且與正常草地間有基因流，只要採取合理的草地利用措施，減輕放牧壓力，退化草地即可恢復，若採取人工補播正常種群種子，將會加快退化種群的恢復進程。Complementary degenerate series
補退化系列The complicated mountain topography and disturbed degradation ecosystem cause the landscape characteristics of high patch size coefficient of variance, anomalistic patch shape and high fragmentation degree. the moderate erosive intensity and area are both the greatest, which mostly distributed in the degraded landscape affected by human unreasonable activities
巫溪縣復雜的山地地勢及受干擾的退化系統，形成了其斑塊面積變異性大、形狀不規則、破碎化程度高的景觀特點，中度侵蝕是侵蝕強度與面積均大的侵蝕類型，且主要分佈在受人類不合理開墾、濫砍濫伐活動的退化景觀上。The philosophy and methodology of performance - based seismic design ( pbsd ) has been an extensive topic discussed by earthquake engineering experts at home and abroad. in this paper, research work on displacement - based seismic design ( dbsd ) at home and abroad are systematically collected and analyzed. based on the available references of seismic behavior of frame - wall buildings, the method of dbsd of reinforced concrete frame - wall buildings is primarily put forward by taking into account the fault of methods of seismic design in current code. the main contents are as follows : the actual stiffness of frames and seismic walls at different deformation stages are determined from experimental data, and the results are adopted in the dbsd method
本文對國內外基於位移的抗震設計研究成果進行了較系統的綜述與分析，在已有框架-剪力墻結構抗震性能研究的基礎上，針對現行抗震設計方法的不足，提出了鋼筋混凝土框架-剪力墻結構直接基於位移的抗震設計方法，並對其進行了一些研究和探索，主要內容如下：對國內外框架和剪力墻的模型試驗數據進行分析，量化了剛度退化系數與層間側移角之間的關系，並將其結果引入框架-剪力墻結構直接基於位移的抗震設計方法中。Using the method of parabolic regularization, we first study the existence of the optimal control of nondegenerate systems governed by where and jn is mollifying sequence in r. by de giorgi - nash ' s technique, we obtain some uniformly estimates of solutions of regularizing prob - lem, from compactness, we prove the existence of the optimal control of degenerate system by a approximate approach
利用拋物正則化方法，我們首先研究了非退化系統最優控制的存在性，其中而j _ n是r上的軟化子。利用degiorgi - nash技巧，對正則化問題的解可以得到一些一致估計，利用緊性，通過一個逼近過程我們得到了退化系統最優控制的存在性。Considering the deterioration series of populations, deterioration degrees led to morphological variations. with the increasing of grassland deterioration, vegetative tiller length and reproductive tiller length became shorter. medium sized bunch, small sized bunch, reproductive tiller percentage, reproductive tiller number were reduced
退化系列種群的形態變異隨退化程度而異，營養枝和生殖枝長度隨著退化的加重枝條長度變短，中、小株叢減少，生殖分配減少，生殖枝數量減少。Deterioration series of populations were analyzed by the means of allozyme and rapd. the results showed that as the deterioration of grassland became heavier, genetic diversity would drop, but there was no distinct linear correlation between genetic diversity and deterioration degree
等位酶和rapd標記分析退化系列種群，其遺傳多樣性隨退化程度加重有降低的趨勢，但與退化程度無明顯的線性相關。Hollow shear walls " stiffness degeneration, seismic action of frame - shear wall is made certain. this paper presents a method for calculating frame - shear wall structure in elastic - plastic phase based on traditional elastic calculating method. the reference is advanced to make sure the earthquake action of frame - shear wall structure with r. c
本文利用試驗中得出的空心剪力墻的剛度退化系數，並根據傳統的框-剪結構彈性計算方法，建立了彈塑性階段框架-剪力墻結構的簡化計算方法，為有鋼筋混凝土空心剪力墻的框-剪結構地震作用的確定提供了參考。分享友人