邊際條件 的英文怎麼說

中文拼音 [biāntiáojiàn]
邊際條件 英文
marginal condition
  • : 邊Ⅰ名詞1 (幾何圖形上夾成角的直線或圍成多邊形的線段) side; section 2 (邊緣) edge; margin; oute...
  • : Ⅰ名詞1 (靠邊的或分界的地方) border; boundary; edge 2 (里邊; 中間) inside 3 (彼此之間) betwe...
  • : Ⅰ名詞1 (細長的樹枝) twig 2 (條子) slip; strip 3 (分項目的) item; article 4 (層次; 秩序; 條...
  • : Ⅰ量詞(用於個體事物) piece; article; item Ⅱ名詞1. (指可以一一計算的事物) 2. (文件) letter; correspondence; paper; document
  • 邊際 : (邊界; 邊緣) limit; bound; boundary
  • 條件 : 1. (客觀的因素) condition; term; factor 2. (提出的要求) requirement; prerequisite; qualification
  1. In recent years, plentiful and substantial fruits achieved by the lb method in simulations of hydraulics, multiphase flows, flows in porous media and heat transfer as well as magnetohydrodynamics, have revealed a broad perspective of application of this method, it will become a powerful competitor to the conventional approaches. in order to absorb the recent achievement in theory and application of the lb method, explore new ways in hydraulic computation to promote the development of practice, some work is car ried out in this thesis, as following : advances in the theory research and application, deductive process of the d2q9 model and some other commonly used models of the lb method are summarized. based on the hydrodynamic and general boundary conditions, a new joint boundary condition is presented, it integrates advantage of the two conditions above and obtains very good results in dealing with all kinds of boundaries of flow fields

    為了消化和吸收近年來lb方法在理論和應用方面的新成果,探索在水力計算方面的新途徑以促進lb方法實用化的發展,本文進行了下列研究工作:綜述了lb方法在理論研究和實應用方面的新進展,以及d2q9模型的推導過程和其他一些常用的模型;在水動力和通用的基礎上提出了一種新的聯合方法,它綜合了上述兩種的優點,在流場的各種界處理中取得了非常好的效果,經過模塊化的處理以後這種具有更好的實用性;針對均勻網格的lb方法計算效率較低的不足,提出了雙重網格的latticeboltzmann方法,通過二維poiseulle流動、后臺階流動和渠道方槽流動三個算例的模擬,證明這種方法能夠明顯地提高流場模擬的計算效率;此外,根據復雜區域流場的特徵提出了latticeboltzmann方法的分塊-耦合演算法,利用lb方法的計算特性實現塊與塊之間的數據交換,充分利用計算資源提高計算效率,通過對「 t 」型、 「十」型和「 x 」型分岔管道流場的模擬,展示了這種演算法的特徵和優點,以及它所具有的應用前景。
  2. Unfortunately, the numerating model used in such method is quite different from the actual instance, and the constraints are to o simple, the effects of the side load, elastic modular of the stone body of the foundation and the compatible structural deformation are not involved in. due to the asymmetry of the spatial load, it is quite different between the analysis results and the test data

    這種集中計算方法力學模型的建立與結構的實受力情況出入較大,且對考慮過于簡單,對荷載的影響、基礎巖體彈模的影響及結構本身變形協調一致等均未能一併考慮,對于空間受力不對稱的狀況,作為二維問題分析時計算結果與應力測試結果出入較大。
  3. Using the trial - solution method under specific boundary conditions, the diffusion equations were derived of chlorine, singlet oxygen, and total oxygen in gas and liquid phases

    在實工作中的射流發生器非常復雜,其擴散方程和為非線性,非齊次,非齊次泛定方程組,求解難度較大。
  4. This paper establishes a model simulating dam actual placing process and considering the non - continuity of initial temperature on the boundary of new and old concrete, daily air temperature change, concrete - placing temperature, hydration heat, heat insulation on boundary, water - storing process, placing intermission and curing with water. the calculation of stress field considers the concrete weight, static water pressure, thermal stress, different autogenous volume change between rcc and normal concrete, change of elastic modulus of concrete with age and creep action

    考慮了乞今最為全面的初始,包括模擬壩體的實升程過程,考慮了新老混凝土接觸面上的初始溫度不連續,逐日的氣溫變化,混凝土的入倉溫度,水化熱溫升,界保溫,水庫蓄水過程,澆築間歇以及灑水養生等因素;應力場的計算考慮了混凝土的自重,靜水壓力,溫度應力,常態混凝土與碾壓混凝土不同的自生體積變形,混凝土的彈性模量隨齡期的變化以及徐變的作用。
  5. According to actual situation of production wells, external boundary conditions and coupled inner boundary conditions between welibore and adjacent rocks, welibore and production zones, adjacent rocks and production zones are constructed, and an alternate direction implicit finite difference algorithm ( adi ) is used to solve temperature models

    根據生產井的實情況,構建起外以及井筒與圍巖、井筒與產層、圍巖與產層之間的耦合內,採用交替方向半隱式有限差分方法( adi方法)求解所建立的井下溫度場模型。
  6. Use is made of the elliptic coordinates for the ease of treating ellipse shaped boundary, while the analytical results for the components in the cartesian coordinates are provided for convenience of application

    分析引入橢圓坐標,以助於處理問題的,並最終給出直角坐標下各分量的對應結果,以便於實應用。
  7. Sandbag is used to make a flexible wall around the model in order to make the condition of the experiment more closely to the true condition

    為使其盡量同實情況一致,模型周圍採用了砂袋作柔性擋土墻。
  8. Through the excel program, and combining the inside and outside environment of the excavation and stress field and displace field, the data of stress and displacement of points are analyzed in variable depth and load grade and terminal state. the spss software has been applied to the statistics of geometry parameter of failure surface, and the failure surface criterion is created by the linearity regression from d ( the longest horizontal distance between the failure surface and the side face of the slope ), ho ( the depth

    此外,應用spss軟體對試驗破壞滑弧的幾何參數進行統計分析,並對滑弧的最大水平深入距離d及d處至坑底的高度h _ 0結合各水理指標進行多元線性回歸,建立滑面的判據,並對此判據進行修正,且用實工程對其進行評價,通過反算已知滑面的c 、值,表明對破壞形式有極大的干擾作用,所直接看到的破壞類型土體不是發生整體滑移破壞,而是剝落式的潰屈破壞。
  9. So for, because of the restriction of experiment boundary condition that different original condition and over ideal theorization model that is mentioned in the preface, it is imminence needs to understand the changing of reality soil on the true wave loading in true time and space so that validated and lead next research in theory and simulation

    正如在前言中對此方面研究評述所提及,目前的研究被與實迥異的實驗和過分理想化理論模型制約,迫切需要了解真實的時間和空間尺度下,真實的土體在真實的波浪荷載作用下將發生怎樣的變化,以驗證和引導我們進行的理論與模擬研究。
  10. Without any hypothesis of the propeller ' s geometry, the surface panel method satisfy the body surface boundary condition on the fact body surface, and make the geometry representation of the propeller more precise, the mathematical model is more perfect

    面元法是在實物面上滿足物面,沒有對螺旋槳的幾何形狀做任何假設,能更精確地描述螺旋槳的復雜幾何形狀,其數學模型更加完善。
  11. Some economic characteristic indices, such as the marginal condition for enterprise ' s profit maximization, and substitution property of different comodities etc. under certain market environment, can be analysed by using the said model

    按照經濟分析的要求,利用數學求導的鏈式法則,建立了描述熱力系統生產特性的熱經濟學模型,可分析在特定市場環境下企業利潤最大化的邊際條件、產品替代特性等經濟性能指標。
  12. Using fcc flow - reaction mathematical model and boundary condition developed in paper ( i ) and the operational constants in commercial fcc riser, the hydrodynamics of catalysts and the distribution of concentration of catalytic cracking products, as well as the temperature of two - phase along the riser are simulated and predicted

    運用已經建立的催化裂化反應的數學模型和模型及求解方法,結合煉油廠工業提升管的實操作參數,模擬預測了催化裂化提升管反應器內催化劑顆粒的流場特徵和原料油反應產物的濃度及氣粒兩相平均溫度的沿程分佈特徵。
  13. In this paper, a model of debris flow is calculated by using the finite nodes method with triangle cells. the method is combined with fdm and fem. vast applications proved that it can suit for complex boundary as fem and is efficient as fdm

    這種方法將有限元的思想與有限差分的方法結合起來,吸收了有限元方法中三角網格模擬符合實情況的優點,又具有差分方法計算量小的特點,方法的適用性經過了大量工程實踐的檢驗。
  14. We also analyze the influence of the boundary condition 、 safety distance and deceleration probability to the traffic flow. finally, we propose an crossroad modle. this model is made up of one main road and one branches : traffic with lights placed on the crossing, vehicles " breaking while running and turning to other direction while jamming. we investigate the velocity and flow of the model when the initial density, the brake and turning probabilities, the green to signal ratio are changed. then the reasons causing all the kinds of phenomena are analyzed

    最後研究了周期性下的十字路口的ca模型,該模型由一主幹道和一支道組成,在幹道與支道的交叉路口設置紅綠燈,車輛在運行中對突發事發生反應的剎車,路口的車輛可以轉向等各種實交通行為,並通過計算機模擬,研究模型在改變車輛的初始密度、剎車概率、轉向概率、紅綠燈信號的綠信比等各種情況下支、主幹道車輛的速度、流量的變化,並分析在各種情況下交通狀況的成因,提出改善交通的有效措施。
  15. In the part sea area of the oujiang estuary which has complicated landform, the different ko are adopted in the control equations of flow and salinity process to work out the process of tide level, averaged salinity and the flow field using the invariant flow and the real process of tide level as the boundary conditions. the comparison and analysis among the computed results, the theoretic results and the computed results of two dimensional numeric model in a large area indicate that the model is applicable

    以地形復雜的甌江河口局部海區為例,分別採用給定恆定流以及實潮流過程作為,對水流鹽度過程採用不同的k _ 0形式進行了計算,給出了潮位過程、平均鹽度過程以及流場的逐時計算結果,將計算結果與相應的理論結果、實測資料以及大范圍二維數學模型的計算結果進行了驗證及細致分析,得到了較為滿意的結果。
  16. In the design of applying the numerical simulation method to return roadway bolt support on working face in some mine, the author builds a numerical model that based on real condition, rules of designing numerical model and geological mechanics parameter of the regional terrain as the simulated limiting condition by geological data research in spot

    摘要將數值模擬方法應用到某礦工作面回風順槽煤巷錨桿支護設計中,根據實和建立數值模型的原則,通過現場地質資料調查得到區域巖層地質力學參數作為模擬,建立了數值模擬模型。
  17. As mentioned in above, the boundary condition of ridge waveguide is quite complex, so to solve the field equations directly is very tedious and complicate

    鑒于脊波導的廣泛使用,本課題的研究很有實意義。脊波導的比較復雜,直接求解場方程非常冗長、繁瑣。
  18. Finally in chapter 6, the problems of boundary conditions and incident wave, as the most valuable problem of mrtd as a time - domain method, are studied. this chapter presents the simulation results of the electromagnetic propagation and its interactions with the dielectric slab and analyse of the graph of the reflection coefficient in frequency. compared with fdtd results, the numerical results, obtained using the mrtd method, show the directness and conciseness of mrtd as a time - domain method and the advantages in grid enlargement and saving computer resource etc.

    最後,第六章討論了mrtd作為時域數值技術最具實應用價值的設置和入射波加入等問題,並給出模擬電磁波傳播過程和介質板反射系數頻譜分析,其數值結果表明了mrtd作為時域方法的直觀簡練,與fdtd方法的結果比較,顯示了其在擴大網格、節省計算資源等方面的優勢。
  19. At the meantime, the rock mass may alternate between loading and unloading and it exists in certain kind of liquid, such as surface water, unconfined water, confined water etc for its intrinsic crannies. the practical rock mass concerned project must solve the key stability pr oblem after the understanding of the complicated mechanical characteristic and the deformation trends to guide the following project design and construction for the demand of security, economy, feasibility and validity. however, the intrinsic nonlinearness and complexity of the engineering rock mass become the main difficulty to predict the stability and deformation, the corresponding structure design must ensure enough safety with all the determinate or random force combination, so a model without the geometry distortion and constitutive equation warp is necessary to be built for the quantificational analysis of practical structure ' s stress, for the simulation of the real process and for the determinate evaluation system and optimization

    由於實工程巖體其固有的非線性和復雜性,使得求解對應的諸如其穩定性、變形等問題面臨較大的困難,而有關的工程結構的設計必須保證該結構在外來因素的作用下具有足夠的安全度、經濟性和合理性,這必然要求對巖體及其工程結構的受力與變形有一套量化評判體系和優化技術,抓住實工程問題的本質特徵並建立可行的符合幾何模擬、本構模擬、受力模擬、過程模擬四原則的求解模型,通過該模型的數值模擬成果來指導巖體工程的設計、施工及運營、管理;而巖體結構面的存在使得基於傳統連續介質力學理論的理論分析和數值模擬面臨巨大的挑戰,物理模擬的試驗周期和成本也大大增加,而巖土體工程問題則成為典型的數據有限、了解程度有限類問題,這類問題的解決需要綜合應用理論分析、經驗判斷、物理模擬和數值模擬等方法,數值模擬可以完成目前許多技術手段無法完成的實驗,如參數控制,復雜下的的處理,同時數值模擬具有高可重復性,且數值模擬的成本和人力開銷等遠低於物理模擬,因此研究巖土體工程問題的流形元數值模擬方法是一項具有理論和實工程應用價值的重要課題。
  20. Because the actual position has been assumed to be the boundary constraint, the proposed dynamic models have overcome the weakness that the conventional method is not convenient for the dynamic analysis of the kind of constrained flexible systems

    由於採用了系統變形后的實位置為,本文所提出的受限柔性機器人的動力學模型和柔性機器人協調操作受限負載的動力學模型克服了通常方法不方便對受限柔性系統進行動力學分析的弱點。
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