相似比 的英文怎麼說
中文拼音 [xiāngsìbǐ]
相似比
英文
ratio of similitude-
Form. taxus chinensis var. mairei is protecting plant in the first class, which is a precious and endangering plant in china in this paper, the quantitative characterics of form. taxus chinensis vsr. mairei population including age structure, spatial distribution pattern, growth dynamics of tree basal area, niche characterics, fractal dimension and competition between specises were studied using methods of mathematics ecology from the angle of population ecology of form. taxus chinensis var. mairei, then the prent state and the endangering causes were analysed. this research offers gist to protecting and enlarging the crude resourse of form. taxus chinensis vsr. mairei population, afforesting plantation and sustainable utilize for us
本文從南方紅豆杉種群生態學的角度、主要應用數學生態學的方法探討南方紅豆杉種群的數量特徵，包括南方紅豆杉種群年齡結構、種群空間格局（探討分佈格局動態規律與生境相互關系） 、不同立地條件下種群優勢度增長趨勢、生態位寬度、生態位相似比例、生態位重疊、空間占據能力及種間競爭等，分析其目前現狀及瀕危原因，期望為南方紅豆杉野生資源的保護和擴大、營造人工林及可持續利用提供理論基礎，也為瀕危植物種群生態學的研究提供參考。Low niche breadth and similarity ratio, resulting from the conditions of the droughty desert habitats, are one of the major features of sparsely distributing plants in droughty desert ecological environments
生態位寬度和生態位相似比例小是受制於乾旱荒漠生境條件的結果，是乾旱荒漠生態環境中稀疏荒漠植物的主要特徵之一。To meet the demands for large space and flexible compartmentation of buildings, laminated vierendeel trusses are adopted in high - position transfer story structures. first the bearing characteristics are analyzed, in which reasonable stiffness ratio of the upper chord, middle chord, and lower chord is derived. then combined with an actual engineering model ( 1 8 similar ratio ), the static loading and pseudo - dynamic tests of two models for laminated vierendeel truss used in transfer story structures are conducted, in which one model adopts reinforced concrete, and the other adopts prestressed concrete and shape steel concrete. seismic behaviors are analyzed, including inter - story displacement, base shear - displacement skeleton curves, and equivalent viscosity - damping curves. a program is programmed to carry out the elasto - plastic dynamic analysis, and displacement time - history curves of the two models are derived. the test and analysis results show that the laminated vierendeel truss with prestressed concrete and shape steel concrete has excellent seismic behaviors. it can solve the disadvantages of laminated vierendeel trusses used in transfer story structures. finally, some design suggestions are put forward, which can be referenced by similar engineering
為滿足建築物大空間和靈活隔斷要求，在高位轉換層結構中採用迭層空腹桁架結構.首先分析了其受力性能，得出了空腹桁架各構件合理的截面剛度以及布局形式.然後結合一實際工程，進行了兩榀迭層空腹桁架轉換結構模型（ 1 : 8相似比）的豎向荷載下靜力試驗以及擬動力試驗.其中一榀為普通混凝土迭層空腹桁架，另一榀配置了預應力和鋼骨混凝土，對比分析了兩模型的層間位移比、骨架曲線以及等效粘質阻力系數等抗震性能的比較，並進行了彈塑性動力分析.試驗和分析結果表明，配置預應力和型鋼混凝土的迭層空腹桁架轉換結構具有良好的抗震性能，可以成功地解決迭層空腹桁架作為轉換層結構所產生的弊端問題，最後對這類轉換層結構提出了相應的設計建議In this paper, the niche characteristics of the dominant herb species in the subtropical ev - ergreen broad leaved woodland ( 53 species ) have been measured at the natural reserve of wanmu ling, including niche breadth, niche proportional similarity and niche overlap
對萬木林自然保護區常綠闊葉林森林群落的53個主要種群進行生態位測定，包括生態位寬度、生態位相似比例、生態位重疊。In the plant vegetations are mainly communities, the niche breadths vary greatly and the similarity ratios among different plants are very low
植物群落內生態位寬度懸殊，植物種之間的生態位相似比例很小。So, changing the material property of slrcp to decrease the crack width or to avoid the crack to happen is a good method. this method can keep the advantage of slrcp, and at the same time avoid its disadvantage. so, two new slrcp. is presented : steel lined steel fiber reinforced concrete penstock ( slsfrcp ), steel lined steel fiber self - stress reinforced concrete penstock ( slsfsrcp )
基於此思路，提出了兩種改性鋼襯鋼筋混凝土壓力管道：即鋼襯鋼筋鋼纖維混凝土壓力管道、鋼材鋼筋鋼纖維自應力混凝土壓力管道，並進行了以下開創性的研究： l以三峽電站壓力管道為原型，按相似比1 ： 10製作完成了常規鋼襯鋼筋混凝土壓力管道、改性鋼材鋼筋混凝土壓力管道模型。Surprisingly for astronomers and nuclear physicists, the abundance ratios of thorium to other heavy elements are very similar to ratios found for milky way stars
出乎意料的天文學家和核物理學家豐比率釷等重元素非常相似比率發現銀河系恆星It simulates human ' s behavior in the process of conventional experiential quotation, and quantifies the useful information of a new die part and a series of correlative die samples accumulated in the foregone quotation experience by fuzzy membership, and then compares the similarity between the new part and the samples after computing their fuzzy level of approximation to find three of the most similar samples, based on which the producing cost of the new part is estimated by exponential - smoothing - method
本文提出的模糊相似比較法和工時法相結合的模具報價方法，就是模擬傳統的經驗報價中人的報價行為過程，利用模糊理論中的模糊隸屬度來量化新工件與原有的在以往生產實際中積累的一系列相關模具樣本的有用信息，計算它們之間的模糊貼近度，進行相似度比較，找出與新工件最相似的三個模具樣本，在此基礎上利用預測技術中的指數平滑法估算出新工件的生產成本。The scaling law is a power law if, and only if, a characteristic dimension is absent
2 、證明相似定律是依尺寸相似比的乘冪關系的規律。Using the means of similar analysis, this paper derives such similar standard and ratio as geometric similar, time similar, dynamic similar, movement similar, and material similar with geological structure physical model, discusses the experimental model, means, materials and the boundary condition of geological structure physical modeling experiment, points out that they might simulate various complex geological structure patterns with different materials under the definitive boundary condition
摘要把地質構造物理模擬實驗模型抽象為動力相似問題進行討論，用相似理論分析導出了地質構造物理模型的相似準則並給出了相似比，認為幾何相似、動力相似、材料相似和邊界相似是反映地質構造現象的主要相似條件，時間相似、運動相似和其他相似條件是反映地質構造現象的次要相似條件。Adopting archimedes number arq as similarity standard, the author determine every kind of similarity scale according to geometry scale 1 / 18 and other limit condition, at the same time, complete organization of model essence, simulation heat source system, design and arrangement of air supply and exhaust system according to every kind of similarity scale
採用熱量阿基米德數arq作為相似準則，按照1 / 18的幾何比例尺以及其他制約條件確定各種相似比例尺。根據各種相似比例尺完成模型本體結構、模擬熱源系統及模型送排風系統的設計和配置。Moreover, the simularity scale relations for the tidal current and sediment experiment and the tidal current and pollutant dispersion experiment are also derived
同時，還導出了潮流泥沙試驗和潮流污染物擴散試驗的相似比尺關系。Even the chemical synthesis model sand can not satisfy the need of silt dynamics research in different similar scale for the expensive self - cost and unchangeable density
而採用合成的樹脂顆粒作為模型沙，成本較高，且過于圓滑，亦不能根據相似比尺的要求調整其密度，給泥沙動力學研究造成不便。With theory analysis, similarity principle and similarity three - laws of hydromechanics, the paper applies methods of law analysis and equation analysis to give an assumptive condition of simulation and original mold ’ s geometry scale, with which to deduce parameters " simulation scale, and builds theory foundation for experiments of model
在模型試驗階段，在理論分析的基礎上，藉助于流體力學相似性原理，應用定律分析法，以模型和原型的幾何比例尺為基礎，推導出各參數的相似比例尺，從而為模型試驗打下了理論基礎。The test results indicated that : crack similitude of reinforced concrete simple beams is not equal to model scale under the working load ; when the amount and surface shape of reinforcing bar are same, the similitude of crack width, crack amount and crack spacing of reinforced concrete simple beams of different scales are all nearly equal to the square root of model scale ; when the amount and surface shape of reinforcing bar are different, the similitude of crack amount and crack spacing are still nearly equal to, whereas the crack width is not only approximately proportional to, but the influence of the amount and surface shape of reinforcing bar on crack width should be considered also at the same time
試驗結果表明：在使用荷載下，鋼筋混凝土簡支梁的裂縫相似率並不等於幾何相似比；當鋼筋根數及形式相同時，不同模型比尺下的鋼筋混凝土簡支梁的裂縫寬度、裂縫條數及裂縫間距的相似率，均約等於模型幾何相似比的平方根；當鋼筋根數及形式不同時，裂縫條數及裂縫間距的相似率仍然約等於，而裂縫寬度的相似率近似與成正比，但應同時考慮鋼筋根數與鋼筋表面形狀對裂縫寬度相似率的影響。On the other hand, an experimental small - scale model, which is 1 : 8 - scaling model of the polyu / ustc atrium, was established. the effects of some factors on the smoke layer interface of the smoke exhaust system in atria are studied by using the orthogonal experiments
論文以香港理工大學和中國科技大學合建的大空間火災實驗廳為原型，按1 ： 8的相似比例，搭建了中庭火災相似模型實驗臺，採用兩水平正交實驗研究了影響機械排煙系統煙氣層高度的幾個因素。The work presented in this thesis is part of the research project - similitude laws and nondestructive diagnosis on concrete pavements, which is supported by china national science foundation. 9 slabs were tested to failure with factors of slab thickness, size ratio of geometrically similar slabs and loading place taken into account
本課題在國家自然科學基金項目「混凝土路面板相似理論與損傷診斷研究」 （批準號59978015 ）資助下，進行了不同厚度、不同幾何相似比的9塊剛性路面板的試驗研究。The dissertation builds the original feature set, fuzzy memberships and weights of small stamping die, which provides basic principle and method to resolve the practical problem. 3
以沖裁模為研究對象，建立其初步的特徵工件集合、模糊相似關系和權值，提供了解決這一實際問題的基本原則和方法，從理論上解決了模糊相似比較法的報價方法問題。The main contents include : 1. the mechanics performances of geometrically similar slabs under static load on the same elastic foundation are similar, according to the analysis of slabs with similitude laws and tests of soil stress under rigid pavements with different size ratios. 2
主要內容包括： 1 、根據靜力荷載下不同相似比的剛性路面板下的土壓力測試結果，結合應用相似理論對彈性地基板所作的分析，指出同一場地土上幾何尺寸相似的彈性地基板在靜載下的力學性能相似。Fifthly, the paper utilize the fuzzy mathematics principle to analyse model setting up, model discerning, fuzzy decision - making process of fuzzy mathematics, the conclusion is drawn that we appraised mould cost with fuzzy similar comparative method, with fuzzy mathematics the expert ' s behavior is simulated as well as the useful information is drawn lastly, the fuzzy similar appraisal mathematics model on basic of man - hour method is set up, the characteristic factors to describe automobile covering of mould and coefficient of influence factor to synthetically judge similar work are confirmed which raises the precision of price by mathematics foundation, work characteristic sureness, influence factor sureness, management of sample data, etc. of weight of factor of model, the paper set up more intact theoretical system of mould price estimate with fuzzy similar comparative method
建立了基於工時法的模糊相似評價數學模型，確定了描述汽車覆蓋件模具的特徵因素；並確定了綜合評判工件相似性所用各影響因素的權重集合，提高了模具價格估計的精度。通過對數學模型的建立、工件特徵因素的確定、影響因素權重的確定、樣本數據的管理等的研究，本文較完整的建立了利用模糊相似比較方法估算模具價格的理論體系。在分析模具報價流程和決策過程的基礎上，開發了汽車覆蓋件模具計算機輔助報價系統，該系統安全、方便、準確。分享友人