LEADER 01649oam 2200481 450 001 9910707049303321 005 20160323111821.0 035 $a(CKB)5470000002460995 035 $a(OCoLC)886560650 035 $a(EXLCZ)995470000002460995 100 $a20140812d1989 ua 0 101 0 $aeng 135 $aurmn||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aGeology and geochemistry of the Pitch uranium mine area, Saguache County, Colorado /$fby J. Thomas Nash 210 1$a[Reston, Va.] :$cDepartment of the Interior, U.S. Geological Survey,$d1988. 210 2$a[Washington, D.C.] :$cUnited States Government Printing Office. 215 $a1 online resource (iv, 38 pages) $cillustrations, maps 225 1 $aU.S. Geological Survey bulletin ;$v1797 300 $aTitle from title screen (viewed Aug. 11, 2014). 320 $aIncludes bibliographical references. 606 $aGeology$zColorado$zSaguache County 606 $aUranium ores$zColorado$zSaguache County 606 $aGeology$2fast 606 $aUranium ores$2fast 607 $aColorado$zSaguache County$2fast 615 0$aGeology 615 0$aUranium ores 615 7$aGeology. 615 7$aUranium ores. 700 $aNash$b J. Thomas$g(John Thomas),$f1941-$01382440 712 02$aGeological Survey (U.S.), 801 0$bCOP 801 1$bCOP 801 2$bOCLCO 801 2$bOCLCF 801 2$bGPO 906 $aBOOK 912 $a9910707049303321 996 $aGeology and geochemistry of the Pitch uranium mine area, Saguache County, Colorado$93526988 997 $aUNINA LEADER 05186nam 2200565Ia 450 001 9910791971603321 005 20230105233523.0 010 $a0-19-163034-9 010 $a1-283-42690-0 010 $a9786613426901 010 $a0-19-163033-0 035 $a(CKB)2560000000079339 035 $a(EBL)834727 035 $a(OCoLC)772845035 035 $a(MiAaPQ)EBC834727 035 $a(Au-PeEL)EBL834727 035 $a(CaPaEBR)ebr10523344 035 $a(CaONFJC)MIL342690 035 $a(EXLCZ)992560000000079339 100 $a20110622d2011 uy 0 101 0 $aeng 135 $aur|n|---||||| 200 14$aThe finite element method$b[electronic resource] $ean introduction with partial differential equations /$fA.J. Davies 205 $a2nd ed. 210 $aOxford ;$aNew York $cOxford University Press$d2011 215 $a1 online resource (308 p.) 300 $aDescription based upon print version of record. 311 $a0-19-960913-6 320 $aIncludes bibliographical references and index. 327 $aCover; Contents; 1 Historical introduction; 2 Weighted residual and variational methods; 2.1 Classification of differential operators; 2.2 Self-adjoint positive definite operators; 2.3 Weighted residual methods; 2.4 Extremum formulation: homogeneous boundary conditions; 2.5 Non-homogeneous boundary conditions; 2.6 Partial differential equations: natural boundary conditions; 2.7 The Rayleigh-Ritz method; 2.8 The 'elastic analogy' for Poisson's equation; 2.9 Variational methods for time-dependent problems; 2.10 Exercises and solutions; 3 The finite element method for elliptic problems 327 $a3.1 Difficulties associated with the application of weighted residual methods3.2 Piecewise application of the Galerkin method; 3.3 Terminology; 3.4 Finite element idealization; 3.5 Illustrative problem involving one independent variable; 3.6 Finite element equations for Poisson's equation; 3.7 A rectangular element for Poisson's equation; 3.8 A triangular element for Poisson's equation; 3.9 Exercises and solutions; 4 Higher-order elements: the isoparametric concept; 4.1 A two-point boundary-value problem; 4.2 Higher-order rectangular elements; 4.3 Higher-order triangular elements 327 $a4.4 Two degrees of freedom at each node4.5 Condensation of internal nodal freedoms; 4.6 Curved boundaries and higher-order elements: isoparametric elements; 4.7 Exercises and solutions; 5 Further topics in the finite element method; 5.1 The variational approach; 5.2 Collocation and least squares methods; 5.3 Use of Galerkin's method for time-dependent and non-linear problems; 5.4 Time-dependent problems using variational principles which are not extremal; 5.5 The Laplace transform; 5.6 Exercises and solutions; 6 Convergence of the finite element method; 6.1 A one-dimensional example 327 $a6.2 Two-dimensional problems involving Poisson's equation6.3 Isoparametric elements: numerical integration; 6.4 Non-conforming elements: the patch test; 6.5 Comparison with the finite difference method: stability; 6.6 Exercises and solutions; 7 The boundary element method; 7.1 Integral formulation of boundary-value problems; 7.2 Boundary element idealization for Laplace's equation; 7.3 A constant boundary element for Laplace's equation; 7.4 A linear element for Laplace's equation; 7.5 Time-dependent problems; 7.6 Exercises and solutions; 8 Computational aspects; 8.1 Pre-processor 327 $a8.2 Solution phase8.3 Post-processor; 8.4 Finite element method (FEM) or boundary element method (BEM)?; Appendix A: Partial differential equation models in the physical sciences; A.1 Parabolic problems; A.2 Elliptic problems; A.3 Hyperbolic problems; A.4 Initial and boundary conditions; Appendix B: Some integral theorems of the vector calculus; Appendix C: A formula for integrating products of area coordinates over a triangle; Appendix D: Numerical integration formulae; D.1 One-dimensional Gauss quadrature; D.2 Two-dimensional Gauss quadrature; D.3 Logarithmic Gauss quadrature 327 $aAppendix E: Stehfest's formula and weights for numerical Laplace transform inversion 330 $aThe finite element method is a technique for solving problems in applied science and engineering. 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