粘性項 的英文怎麼說
中文拼音 [niánxìngxiàng]
粘性項
英文
viscosity term-
In water hydrostatic bearing lubrication, however, more accurate research results can be obtained as long as inertia of water flow is considered, because inertia item almost has the same quantitative level as the viscous one
然而，在水靜壓支承潤滑中，水的流動慣性項幾乎與粘性項具有相同的數量級，對水膜的流速及壓力分佈具有一定的影響，因此應予以考慮，才能得出更加準確的研究結果。Finally, in the third section, by constructing some functional which similar to the conservation law of evolution equation and the technical estimates, we prove that in the inviscid limit the solution of generalized derivative ginzburg - landau equation ( ggl equation ) converges to the solution of derivative nonlinear schrodinger equation correspondently in one - dimension ; the existence of global smooth solution for a class of generalized derivative ginzburg - landau equation are proved in two - dimension, in some special case, we prove that the solution of ggl equation converges to the weak solution of derivative nonlinear schrodinger equation ; in general case, by using some integral identities of solution for generalized ginzburg - landau equations with inhomogeneous boundary condition and the estimates for the l ~ ( 2 ) norm on boundary of normal derivative and h ~ ( 1 ) ' norm of solution, we prove the existence of global weak solution of the inhomogeneous boundary value problem for generalized ginzburg - landau equations
第三部分：在一維情形，我們考慮了一類帶導數項的ginzburg ? landau方程，通過構造一些類似於發展方程守恆律的泛函及巧妙的積分估計，證明了當粘性系數趨于零時， ginzburg ? landau方程的解逼近相應的帶導數項的schr （ ? ） dinger方程的解，並給出了最優收斂速度估計；在二維情形，我們證明了一類帶導數項的廣義ginzburg ? landau方程整體光滑解的存在性，以及在某種特殊情形下， gl方程的解趨近於相應的帶導數項的schr （ ? ） dinger方程的弱解；在一般情形下，我們討論了一類ginzburg ? landau方程的非齊次邊值問題，通過幾個積分恆等式，同時估計解的h ~ 1模及法向導數在邊界上的模，證明了整體弱解的存在性。Actually, n - s equation has three unknown functions u, v, p and three equations, now prandtl boundary layer equation has two unknown functions w, vand two equations only, and viscosity terms has partly reduced
原來有三個未知函u ， v ， p及三個方程，現在只有兩個未知函數u ， v及兩個方程，且粘性項也少了一些，這些都是簡化的地方。This dissertation mainly investigates the properties of solutions of a class of quasi - linear wave equations with a viscosity, a nonlinear perturbation ( source term ) and a dissipative term ( damping term ), which arises from the longitudinal motion of a visco - elastic material. it contains the problems of existence and uniqueness of solutions, global existence, asymptotic behaviour and finite time blow up, etc. this thesis consists of four parts
本論文主要研究來自於物體的波動等應用領域中的一類帶有粘性項、非線性擾動項（源項）和耗散項（阻尼項）的擬線性波動方程解的定性性質，內容包括解的存在唯一性，解的整體存在性和漸進性態及解在有限時刻爆破等問題The total pressure is subdivided into the hydrostatic and residual hydrodynamic components. k - e turbulent flows model, non - staggered curvilinear grids, momentum interpolation, simplec and simpler algorithms are used to solve the basic equations
水流運動方程壓力項分解為靜水壓力和動水壓力，紊動粘性系數由k紊流模型求解，非交錯網格減化方程離散，降低插值運算。For the present two les models, adopting the subgrid eddy viscosity concept and introducing the transport equation of turbulence energy k, the subgrid scale turbulence is parameterized by the turbulence energy k and the length scale of turbulence / ( k - 1 model ). in addition, vegetation is considered as an internal source of resistant force and turbulence energy
在應用大渦模擬方法求解數值計算模型控制方程時，亞網格雷諾應力項沿用了亞網格渦粘性系數思路，引入亞網格紊流脈動動能k的輸運方程，建立了關于亞網格紊流脈動動能k和紊流特徵長度l的k - l模型求解。To ensure the numerical dissipation much smaller than the physical viscous terms, directional scaling of the artificial dissipation is achieved and proper boundary conditions are also introduced in this term
為保證高雷諾數下n - s方程的數值粘性遠小於物理粘性，對人工粘性項進行了方向性修正並引入適當的邊界條件。In this thesis, the modified critical fracture resistance was defined by excluding the viscoelastic dissipation, which is related to the intrinsic fracture energy
本文利用內稟斷裂能的概念，定義了不含粘性耗散項的臨界斷裂阻力。The study solves engineering problem as follows : ( 1 ) the systematic study on the historical course of xigeda strata deposit and geologic environment includes strata, lithologic characters and constitution et in the liangshan and panzhihua region. the results show that the xichang - panzhihua express way is controlled by the anninghe fault and the xigeda fault, the earthquake frequently happen in the region of pass, the different sedimentation number is more great, they effect the road building, safety in operation and structure belong road ( 2 ) because in some place the xigeda strata is foundation and roadbed, the study on the basic properties of the xigeda strata include density, moisture content plastic and liquid limit graduation. the results show that the xigeda strata is deposition in lake, the main component is mudstone and sandstone, the fine particle is main, it has some viscosity, the moisture content of mudstone is different the it of sandstone, the other property are likeness. the xigeda strata has no dilatation on total, some claystone have low and medium dilatation ; ( 3 ) the study on the basic properties of xigeda filler include the composition of matter the biggest standard dry density, the optimum moisture content the results show that xigeda filler can use as road material, it is well grade filler and admixture filler on essence, its compaction index should change in different place because the property is controlled by mudstone and sandstone that change is great in different place ; ( 4 ) the study on the xigeda filler craft used as express way roadbed, includes suitable thickness, compaction numbers and methods and equipment choice et
公路沿線廣泛分佈有昔格達地層，昔格達地層能否用作高速公路路基填料，國內沒有先例，本論文就是結合導師的科研項目，在非典期間，現場長達5個月的工作，完成了從試驗、現場施工工藝到路堤分層沉降監測等工作，是面對生產實際，認識昔格達地層的性質和其作為地基、路基和填料應用中面臨的問題進行的研究。主要的研究內容有：對攀西地區地層巖性、構造等地質環境和昔格達地層的沉積歷史過程作了系統的分析，研究表明西攀高速公路主要受安寧河斷裂和昔格達斷裂影響，通過地區地震活動頻繁，差異沉降較大，對公路建設、安全運行和沿線構築物設計有較大影響；由於昔格達地層在有些路段作為地基、有些作為路基，對其基本性質進行了研究：包括天然密度、含水量、塑液限、顆粒級配等指標的試驗研究。研究成果表明：昔格達地層為湖相沉積，主要為砂巖和泥巖，它以細粒組為主，同時粘粒的存在，使其具有一定粘性。In oil lubrication theory, the effect of inertia on flow state of lubrication film is generally ignored because the inertia item is far smaller than the viscous one
在油潤滑理論中，一般情況下都忽略慣性對潤滑膜流動狀態的影響，這是因為慣性項與粘性項相比要小得多。Only clouds of points instead of grids are distributed over the computational domain and the spatial derivatives are estimated using a least - square curve fit on local clouds of points. the paper gives discrete form for euler equations on base of gridless method, and adopts five steps runge - kutta scheme for time - marching. the numerical results have been obtained for the 2 - d flows over airfoils or multi - element airfoils using the method presented
本文首先對無粘euler方程進行無網格離散，並運用顯式runge - kutta格式推進求解，成功地數值模擬了二維單段和多段翼型的繞流；在此成功的基礎上通過在euler方程的右端加入粘性項，使求解方程變為層流navier ? stokes方程，得到了翼型繞流，數值結果顯示出粘性的影響。The ns solver is developed from euler equation code by adding viscous terms and two - equation turbulence models. in order to get a better result, the improved jameson second and forth artificial dissipation is used, the implicit residual averaging and local time step techniques are employed to accelerate the convergence processing
本文是在歐拉方程求解器的基礎上，通過加入粘性（耗散）項，把流場的主控方程由歐拉方程（ euler ）改為ns方程，然後引入兩方程湍流模型，使其封閉。Fluorocarbon paint paint fluorocarbon coating, fluororesin coating : coating, coatings with the introduction of the element fluorine - - negative, fluorocarbon bond energy, and possess exceptional properties : weatherability, heat resistance, low temperature resistance, chemical, but not unique viscosity and low friction, fluoride coatings in the construction, chemical industry, electrical electronics industry, machinery industry, the aerospace industry, household goods in various fields has been extensively applied to become acrylic coatings, polyurethane coatings, silicone coating and other high - performance coatings, the highest performance coatings brands
氟碳油漆漆、氟碳塗料、氟樹脂塗料：在各種塗料之中，氟樹脂塗料由於引入的氟元素電負性大，碳氟鍵能強，具有特別優越的各項性能：耐候性、耐熱性、耐低溫性、耐化學藥品性，而且具有獨特的不粘性和低磨擦性，氟塗料在建築、化學工業、電器電子工業、機械工業、航空航天產業、家庭用品的各個領域得到廣泛應用，成為繼丙烯酸塗料、聚氨酯塗料、有機硅塗料等高性能塗料之後，綜合性能最高的塗料品牌。It is believed that it can bring the important inspiration for the future medical micro robot which can be embedded into inner organ of human for inspection, drug spot deliverance and local body surgery. supported by supported by the nation nature science foundation of mechanism, structure and control study on swimming micro robot in liquid ( item no. 69885002 ) and guangdong province science foundation of research on swimming micro robot in liquid ( item no. 980402 ) and guangdong province education department foundation of research on micro pipe robot driven by liquid self energy ( item no. 010043 ), this dissertation mainly deals with much theoretical and, including research situation and the main issue of micro mobile robot in liquid, fish propulsion mechanism, design and locomotion mechanism, and flagellum - like propulsion swimming micro robot in low reynolds number viscous liquid
本論文得到國家自然科學基金項目「泳動微機器人的機理、機構和控制」 （項目資助號： 69885002 ） 、廣東省自然科學基金項目「液體中泳動微機器人的研究」 （項目資助號： 980402 ）和廣東省教育廳基金項目「基於流體自身能量的微管道機器人研究」 （項目資助號： 010043 ）的資助，主要對液體中微機器人的國內外研究現狀和主要研究問題、魚類推進機理、液體中微機器人的設計與運動機理、低雷諾數粘性液體中仿鞭毛推進微機器人研究等方面進行了大量的理論與實驗研究。This feature reflects the physical phenomenon of breaking of waves and development of shock waves. in the fields of fulid dynamics, ( 0. 2. 1 ) is an approximation of small visvosity phenomenon. if viscosity ( or the diffusion term, two derivatives ) are added to ( 0. 2. 1 ), it can be researched in the classical way which say that the solutions become very smooth immediately even for coarse inital data because of the diffusion of viscosity. a natural idea ( method of regularity ) is obtained as follows : solutions of the viscous convection - diffusion pr oblem approachs to the solutions of ( 0. 2. 1 ) when the viscosity goes to zeros. another method is numerical method such as difference methods, finite element method, spectrum method or finite volume method etc. numerical solutions which is constructed from the numerical scheme approximate to the solutions of the hyperbolic con - ervation laws ( 0. 2. 1 ) as the discretation parameter goes to zero. the aim of these two methods is to construct approximate solutions and then to conside the stability of approximate so - lutions ( i, e. the upper bound of approximate solutions in the suitable norms, especally for that independent of the approximate parameters ). using the compactness framework ( such as bv compactness, l1 compactness and compensated compactness etc ) and the fact that the truncation is small, the approximate function consquence approch to a function which is exactly the solutions of ( 0. 2. 1 ) in some sense of definiton
當考慮粘性后，即在數學上反映為（ 0 . 1 . 1 ）中多了擴散項（二階導數項） ，即使很粗糙的初始數據，解在瞬間內變的很光滑，這由於流體的粘性擴散引起，這種對流-擴散問題可用古典的微分方程來研究。自然的想法就是當粘性趨于零時，帶粘性的對流-擴散問題的解在某意義下趨于無粘性問題（ 0 . 1 . 1 ）的解，這就是正則化方法。另一辦法從離散（數值）角度上研究僅有對流項的守恆律（ 0 . 1 . 1 ） ，如構造它的差分格式，甚至更一般的有限體積格式，有限元及譜方法等，從這些格式構造近似解（常表現為分片多項式）來逼近原守恆律的解。Furthermore, the temperature fields of the radial - thrust floating ring hybrid bearing which includes the lubricant inertia item is stud ied for the first time, the reynolds and energy equations are derived, the relationship between viscosity and temperature as well as the boundary condition of pressure and temperature are developed
此外，本文還首次對考慮慣性項下該動靜壓軸承的溫度場進行了理論研究，建立了數學模型，導出了該浮環動靜壓軸承徑向部分、推力部分的能量方程、雷諾方程以及粘溫關系、壓力、溫度邊界條件等。Three spatially discrete schemes about the convection terms of the n - s equations : the centered difference with artificial viscosity by jameson, the van leer scheme of flux vector splitting, and the roe scheme of flux difference splitting are studied respectively
3研究了n - s方程組中對流項的三種空間離散格式：改進的jameson中心+人工粘性格式、通量矢量分裂類vanleer格式和通量微分分裂類roe格式。According to the mathematic modeling principle of physical problem, the error of lattice boltzmann model is analyzed in chapter 3. the nonlinear deviation term from the navier - stokes equation is given, and the main model coefficients, such as speed of sound, viscosity and so on, are verified by numerical computation, the results show that the lattice boltzmann method has second order precision in space and in time which satisfy the engineering application, whereas, the compressible effect ca n ' t be neglected along with mach number increasing, and must be reduced or eliminated
其次，按照物理問題數學建模的原則，對格子法的誤差進行了分析，給出了格子bgk方程再現navier - stokes方程時的壓縮誤差項，並數值驗證了格子模型的聲速及粘性系數等相關參數的精度，表明格子模型盡管具有時空二階精度，能滿足工程計算的要求，但隨著mach數增大，壓縮誤差逐漸成為主要誤差，必須予以消除。In this paper, we investigate comparison principle for semicontinuous viscosity solutions of fully nonlinear elliptic equation with nonlocal intergro - differential item. this kind of equation is from diffusion process with jumps and has important application in stochastic control and finance mathematics
本文研究一類帶有非局部積分項的完全非線性橢圓型方程粘性解的比較原理，這類方程源自帶跳躍的擴散過程，在隨機控制，金融數學中有廣泛而重要的應用。On basis of a review of the recent achievements, the distribution of the lateral seismic inertia force along the height of retaining wall and / or bridge abutment, and the calculation of the seismic soil pressure of cohesive backfill are treated with in this paper, for the revision of chinese earthquake resistant design code for highway construction, and a suggestion to combine sei smic design of retaining wall and of bridge abutment together into one chapter from the past in two chapters in the previous version is also worked out
結合規范jtj004 ? 89的修編，本文在總結已有研究成果的基礎上，主要研究了擋土墻和橋臺地震慣性力沿高度分佈的規律，粘性填土的地震土壓力計算和計算公式的簡化，以及在公路工程抗震設計規范中將擋土墻和橋臺的抗震設計歸入一章的問題，具體包括如下5項工作。分享友人