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time finite element methods for the

Fundamentals of the finite element method for heat and fluid flow   lewis, nithiarasu,seetharamu

Fundamentals of the finite element method for heat and fluid flow lewis, nithiarasu,seetharamu

Vật lý

... up the stiffness matrix and hence solve for the outlet temperature and the effectiveness of the heat exchanger by using element, elements and elements for the heat exchanger Also determine the ... gas; mw , the mass of the wall of the bulb; cpw , the specific heat of the wall; hf , the heat transfer coefficient between the filament and the gas; hg , the heat transfer coefficient between the gas ... without the actual motion of the molecules, or because of the motion of the free electrons if they are present Therefore, this form of heat transport depends heavily on the properties of the medium...
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1 coupling transfer matrix method to finite element method for analyzing the acoustics of complex hollow body networks

1 coupling transfer matrix method to finite element method for analyzing the acoustics of complex hollow body networks

Báo cáo khoa học

... between the full finite element model (FEM) and the hybrid transfer matrix – finite element method (TM-FEM) The thick line in the graph gives the results calculated by the FEM model in the two-port element ... makes the coupling between the transfer matrix method and the finite element method natural For an eventual finite element implementation, the admittance matrix of the two-port acoustical element ... this time the kth acoustical element, N is the number of acoustical elements in the HBN, and {qn} is injected nodal harmonic volume flow rate vector If there is no noise source, {qn} = {0} If there...
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THE ISOGEOMETRIC MULTISCALE FINITE ELEMENT METHOD FOR HOMOGENIZATION PROBLEMS

THE ISOGEOMETRIC MULTISCALE FINITE ELEMENT METHOD FOR HOMOGENIZATION PROBLEMS

Tài liệu khác

... Answering these questions is the aim of the mathematical theory of homogenization These questions are very important in the applications since, if one can give positive answers, then the limit ... quadrilateral elements We denote HK the diameter of elements K TH , and H := maxKTH HK The triangulation is assumed to be conformal and shape regular (see [Ciarlet]) The macro finite element space is then ... over the world The IGA allows to closely link the gap between Computer Aided Design (CAD) and Finite Element Analysis (FEA) It means that the IGA uses the same basis functions to describe both the...
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Finite element model for nonlinear analysis of steel–concrete composite beams using Timoshenkos beam theory

Finite element model for nonlinear analysis of steel–concrete composite beams using Timoshenkos beam theory

Báo cáo khoa học

... thhan the EB EB 8DOF model, because the shhear on of the cross-section c n is taken innto accountt for each llayer Fig presents the deformatio comparisoon for the sliip distributio on along thee ... are the axial strains at the levels of the reference fibres of the two components respectively, θ c ( z ) = ϕ 'c and θ s ( z ) = ϕ 's is the curvature of the RC slab and the steel girder The ... accountinng for the shhear deformaability of booth componeents has been presented p T proposed The d model is fformulated by b modelingg the RC slaab and the stteel girder by means m of thee Timoshenkko...
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boundary element methods for soil structure interaction

boundary element methods for soil structure interaction

Kiến trúc - Xây dựng

... difficulties for finite element models due to the large number of elements involved in the analysis and the lack of infinite elements such as those existing for 2-D problems Boundary Element Methods ... on the one hand the excitation due to waves impinging on the structure depends on the soil properties and the foundation characteristics; on the other hand, the response of the structure to the ... of the perturbation theory is developed and illustrated by means of a numerical example The fifth section is used for the formal development of a BEM formulation based on the perturbation theory...
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Comparison of Methods for the Extraction of Bioflocculants from Activated Sludge

Comparison of Methods for the Extraction of Bioflocculants from Activated Sludge

Môi trường

... released into the culture broth, and the flocculant is obtained from the filtrate of the culture broth; and second, a cell surface material associated with the cell wall or adsorbed to the cell surface ... control test was calculated every minute using the following formula: The relative A660 = A660 of flocculating test A660 of control test For the control, the polymer solution was replaced by distilled ... and washing extraction the lowest (13.3 mg/g, dry sludge) Protein was the main component of all the polymers, although the content varied significantly with the polymer The NaOH- and SDS-extracted...
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03  analysis of mechanical systems using interval computations applied to finite element methods o  dessombz

03 analysis of mechanical systems using interval computations applied to finite element methods o dessombz

Báo cáo khoa học

... convergence of the iterative scheme The smaller the spectral radius of |[G]|, the faster the convergence of the algorithm and the smaller the overestimation of the solution 4.2 TEST OF THE NEW ALGORITHM ... respectively the shear force and bending momentum applied at the free end of the beam, d and θ correspond to the displacement and slope at the free end of the beam The characteristics of the beam are: The ... out the limitations of these formulations, which present a major drawback: the classical formulation does not take into account the way the matrices are built for mechanical problems In fact, the...
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Tài liệu Báo cáo khoa học:

Tài liệu Báo cáo khoa học: "Methods for the Qualitative Evaluation of Lexical Association Measures" doc

Báo cáo khoa học

... precision values above 50% for the rst 10% of the list, but is outperformed by the t-test afterwards Looking at the rst 40% of the data, there is a big gap between the good measures (t-test, ... misleading results For instance, if we just look at the rst of the SLs for the PNV data, we might conclude that the t-test and frequency measures are equally well suited for the extraction of ... the precision (or recall) values achieved For instance, the precision values for and for the AdjN data can be read from the -axis in Figure at positions where and (marked by vertical lines) The...
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Đề tài

Đề tài " A five element basis for the uncountable linear orders " doc

Thạc sĩ - Cao học

... from I The key observation — and the reason why the main theorem goes through — is the following Since P is in E ∩ N , it does not reject Y (N ) and therefore there is a ξ in Ξ ∩ P such that for ... fact such a basis follows from the Proper Forcing Axiom, a strong form of the Baire Category Theorem The elements ∗ are X, ω1 , ω1 , C, C ∗ where X is any suborder of the reals of cardinality ℵ1 ... cardinality ℵ1 , then X serves as a single -element basis for the class of uncountable separable linear orders PFA is a strengthening of the Baire Category Theorem and is independent of the usual axioms...
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Nonlinear Stability of Finite Volume Methods for Hyperbolic Conservation Laws: and Well-Balanced Schemes for Sources ppt

Nonlinear Stability of Finite Volume Methods for Hyperbolic Conservation Laws: and Well-Balanced Schemes for Sources ppt

Cao đẳng - Đại học

... scheme for solving (1.8) is a formula of the form Uin+1 Uin + t (Fi+1/2 Fi1/2 ) = 0, xi (2.5) telling how to compute the values Uin+1 at the next time level, knowing the values Uin at time tn ... domain for (1.8) if it has the property that U (x) U for all x U (t, x) U for all x, t (1.19) Notice that the convexity property is with respect to the conservative variable U There is a full theory ... recently, at the level of analysis with the occurrence of the resonance phenomenon, as well as at the level of numerical methods The numerical diculty here is to treat the dierential term and the source...
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nmr methods for the investigation of structure and transport

nmr methods for the investigation of structure and transport

Đại cương

... upon time derivation due to the time- dependence of the unit vectors Using the product rule for the derivation and the fact that the time derivative of the unit vector is the cross product of !rf ... incrementing tR for different passes of the sequence The second dimension is the time tE at which the echoes occur Several thousand echoes can be observed The third dimension is the time axis for each ... Fundamentals The read gradient is also flow compensated at time tE , of course not for the entire acquisition time Further methods for the phase encoding of velocity are presented in [13] Selection of the...
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báo cáo hóa học:

báo cáo hóa học: " The evolution of methods for the capture of human movement leading to markerless motion capture for biomechanical applications" pptx

Hóa học - Dầu khí

... The classic work at the University of California [5,6] provided a tremendous resource of knowledge related to the mechanics of human movement The work at the University of California formed the ... limit the risk of producing artifact due to markers or the constraints of the testing methods For example, the constraints of the laboratory environment as well as the markers placed on the subjects ... equations to the general deformation case, modeling the deformation by an activity-dependent function, and smoothing the deformation over a specified interval to the functional form A limitation...
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CHL - A Finite Element Scheme for Shock Capturing_1 pdf

CHL - A Finite Element Scheme for Shock Capturing_1 pdf

Kĩ thuật Viễn thông

... of these methods not preserve the original equations within the shock due to this added diffusion Hughes and Brooks (1982) have approached this problem within the finite elements method by the ... analogy to the Euler equations with the depth substituted for density and dropping the energy equation This equation set is ideal for testing numerical schemes for the Euler equations The model ... subsonic craft are supersonic For example, the rotors of helicopters have supersonic regions as the blades of the turbine engines used on many crafts The shock is formed as the flow passes from supersonic...
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CHL - A Finite Element Scheme for Shock Capturing_3 doc

CHL - A Finite Element Scheme for Shock Capturing_3 doc

Kĩ thuật Viễn thông

... relies upon how the elemental deviation compares with that of all the other elements of the grid If a problem contains no shocks, it would still select the worst elements and raise the value of ... show the center-line profile over time of these tests for at = 1.0 and for AX = 0.4 and 0.8 m, respectively These plots represent the center-line depth profile over time in a perspective view The ... where SZi = element i E = mechanical energy a; = area of element i and I?;, the average energy of element i, is calculated by and E = the average element energy over the entire grid S = the standard...
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CHL - A Finite Element Scheme for Shock Capturing_4 pdf

CHL - A Finite Element Scheme for Shock Capturing_4 pdf

Kĩ thuật Viễn thông

... critical reach is in the region of the contraction near the dam breach The basic element length in the channel is 0.1 m and there are five elements across the channel width For the smooth channel ... Figures 24-26 Here the time- history of the water elevation is shown for the inside and outside of the channel for both the numerical model (at of 1.0 and 1.5) and the flume The inside wall is ... arrival time for the outer wave connpared to the inner wave The numerical model does not show this In comparing the water ellevations between the flume and the numerical model, it is apparent that the...
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CHL - A Finite Element Scheme for Shock Capturing_5 potx

CHL - A Finite Element Scheme for Shock Capturing_5 potx

Kĩ thuật Viễn thông

... for time of 3.5 sec The nodes are delineated by the symbols along the lines The overshoot of the second-order scheme and the damping of the first-order is obvious Again, it is probable that the ... http://www.simpopdf.com where the superscript n indicates the time- step and the subscript j is the spatial node location We now present the results of this analysis for a = 112 and for the temporal derivative ... appropriate (time accuracy is irrelevant here) The results from the numerical model run and the flume results are shown in Figure 28 The oblique shock forms along the sidewalls of the transition...
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CHL - A Finite Element Scheme for Shock Capturing_6 potx

CHL - A Finite Element Scheme for Shock Capturing_6 potx

Kĩ thuật Viễn thông

... but restricting the error to the neighborhood of the jump or shock This technique is called ction matrix Furthermore, in order to restrict the shock capturing to the vicinity of the jump, a method ... address the case of advection-dominated flow is a dissipative technique that serves well for the capturing of shocks The dissipative mechanism is large for short wavelengths, thus enforcing energy ... Brooks, A N (1982) "A theoretical framework for Petrov-Galerkin methods with discontinuous weighting functions: Applications to the streamline-upwind procedures." Finite Elements in Fluids R H...
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Cocoa Processing Methods for the Production of High Quality Cocoa in Vietnam ppt

Cocoa Processing Methods for the Production of High Quality Cocoa in Vietnam ppt

Báo cáo khoa học

... 25kg 4: The effect of pod storage on the fermentation temperatures of cocoa 5: The effect of pod storage and fermentation time on the percentage of fully brown beans in the cut test 6: The effect ... covering the fermenting cocoa is the problem of losing heat by dissipation during the fermentation This would cause the cocoa to not attain the high temperatures required for a good fermentation Therefore ... rule, the closer to 50oC, that fermentations reach, the better the quality of the dried cocoa is Typical temperatures for the different types of fermentation are presented in figures 5, & For all...
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