Metadata solutions : using metamodels, repositories, XML, and enterprise portals to generate information on demand / Adrienne Tannenbaum

• Record Nr.: UNISALENTO991000751509707536
• Autore: Tannenbaum, Adrienne, 1955-
• Pubbl/distr/stampa: Boston : Addison-Wesley, c2001
• ISBN: 0201719762
• Descrizione fisica: xxv, 490 p. : ill. ; 24 cm
• Disciplina: 005.15
• Soggetti: Information technology; Metadata
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Nota di bibliografia: Include riferimenti bibliografici e indice

Introduction to Nonlinear Thermomechanics of Solids / / by Michał Kleiber, Piotr Kowalczyk

• Record Nr.: UNINA9910254238203321
• Autore: Kleiber Michał
• Pubbl/distr/stampa: Cham : , : Springer International Publishing : , : Imprint : Springer, , 2016
• ISBN: 3-319-33455-7
• Edizione: [1st ed. 2016.]
• Descrizione fisica: 1 online resource (VIII, 345 p. 69 illus.)
• Collana: Lecture Notes on Numerical Methods in Engineering and Sciences, , 1877-735X
• Disciplina: 531.3
• Soggetti: Mechanics, Applied; Solids; Mechanics; Mathematical physics; Mechanical engineering; Computer-aided engineering; Mathematics - Data processing; Solid Mechanics; Classical Mechanics; Theoretical, Mathematical and Computational Physics; Mechanical Engineering; Computer-Aided Engineering (CAD, CAE) and Design; Computational Science and Engineering
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: Includes Index.
• Nota di contenuto: 1. Introduction -- 1.1. General remarks on the book content -- 1.2. Nonlinear continuum thermomechanics as a field of research and its industrial applications -- 2. Fundamental concepts of mechanics -- 2.1. Statics of a bar -- 2.2. Trusses -- 2.3. Two-dimensional continuum generalization -- 3. Fundamentals of tensor algebra and analysis -- 3.1. Introduction -- 3.1.1. Euclidean space and coordinate systems -- 3.1.2. Scalars and vectors -- 3.1.3. Basis of vector space -- 3.2. Tensors -- 3.2.1. Definitions -- 3.2.2. Operations on tensors -- ; 3.2.3. Isotropic tensors -- 3.3. Second order tensors -- 3.3.1. Definitions and properties -- 3.3.2. Tensor eigenproblem -- 3.3.3. Spectral decomposition of symmetric tensor -- 3.3.4. Polar decomposition of tensor -- 3.4. Tensor functions and fields -- 3.4.1. Integration and differentiation of tensor fields -- 3.4.2. Gauss–Ostrogradski theorem -- 3.5. Curvilinear coordinate systems -- 3.6. Notations used in tensor description -- 4. Motion, deformation and strain in material continuum -- 4.1. Motion of bodies -- 4.2. Strain -- 4.2.1. Definitions -- 4.2.2. Physical meaning of strain in one dimension -- 4.2.3. Physical meaning of strain components -- 4.2.4. Some other strain tensor properties -- 4.3. Area and volumetric deformation -- 4.4. Strain rate and strain increments -- 4.4.1. Time derivative of a tensor field. Lagrangian and Eulerian description of motion -- 4.4.2. Increments and rates of strain tensor measures -- 4.4.3. Strain increments and rates in one dimension -- 4.5. Strain compatibility equations -- 5. Description of stress state -- 5.1. Introduction -- 5.1.1. Forces, stress vectors and stress tensor in continuum -- 5.1.2. Principal stress directions. Extreme stress values -- 5.2. Description of stress in deformable body -- 5.2.1. Cauchy and Piola–Kirchhoff stress tensors -- 5.2.2. Objectivity and invariance of stress measures -- 5.3. Increments and rates of stress tensors -- 5.4. Work of internal forces. Conjugate stress–strain pairs -- 6. Conservation laws in continuum mechanics -- 6.1. Mass conservation law -- 6.2. Momentum conservation law -- 6.3. Angular momentum conservation law -- 6.4. Mechanical energy conservation law -- 7. Constitutive equations -- 7.1. Introductory remarks -- 7.2. Elastic materials -- 7.2.1. Linear elasticity -- 7.2.2. Nonlinear elasticity -- 7.3. Viscoelastic materials -- 7.3.1. One-dimensional models -- 7.3.2. Continuum formulation -- 7.3.3. Energy dissipation in viscoelastic materials -- 7.4. Elastoplastic materials -- 7.4.1. One-dimensional models -- 7.4.2. Three-dimensional formulation in plastic flow theory -- 8. Fundamental system of solid mechanics equations -- 8.1. Field equations and initial-boundary conditions -- 8.2. Incremental form of equations -- 8.3. Some special cases -- 8.4. Example of analytical solution -- 9. Fundamentals of thermomechanics and heat conduction problem -- 9.1. Laws of thermodynamics -- 9.1.1. The first law of thermodynamics -- 9.1.2. The second law of thermodynamics -- 9.2. Heat conduction problem -- 9.3. Fundamental system of solid thermomechanics equations. Thermomechanical Couplings -- 9.4. Thermal expansion in constitutive equations of linear elasticity -- 10. Variational formulations in solid thermomechanics -- 10.1. Variational principles — introduction -- 10.2. Variational formulations for linear mechanics problems -- 10.2.1. Virtual work principle and potential energy -- 10.2.2. Extended variational formulations -- 10.3. Variational formulations for nonlinear mechanics problems -- 10.3.1. Elasticity at large deformations -- 10.3.2. Incremental problem of nonlinear mechanics -- 10.4. Variational formulations for heat conduction problems -- 11. Discrete formulations in thermomechanics -- 11.1. Discrete formulations in heat conduction problems -- 11.1.1. Linear problem of stationary heat conduction -- 11.1.2. General form of the heat conduction problem -- 11.2. Discrete formulations in solid mechanics problems -- 11.2.1. Linear problem of statics -- 11.2.2. Linear problem of dynamics -- 11.2.3. Nonlinear elastic problem with large deformations -- 11.2.4. Incremental form of nonlinear mechanics problem -- 11.3. Weighted residual method -- 12. Fundamentals of finite element method -- 12.1. Introduction -- 12.1.1. FEM formulation for linear heat conduction problem -- 12.1.2. FEM formulation for linear static elasticity problem -- 12.2. FEM approximation at the ; element level -- 12.2.1. Simple one-dimensional elements -- 12.2.2. Constant strain elements -- 12.2.3. Isoparametric elements -- 13. Solution of FEM equation systems -- 13.1. Introduction -- 13.2. Solution methods for linear algebraic equation systems -- 13.2.1. Elimination methods -- 13.2.2. Iterative methods -- 13.3. Multigrid methods -- 13.4. Solution methods for nonlinear algebraic equation systems -- 13.5. Solution methods for linear and nonlinear systems of first order ordinary differential equations -- 13.6. Solution methods for linear and nonlinear systems of second order ordinary differential equations -- Bibliography -- Index. .
• Sommario/riassunto: The first part of this textbook presents the mathematical background needed to precisely describe the basic problem of continuum thermomechanics. The book then concentrates on developing governing equations for the problem dealing in turn with the kinematics of material continuum, description of the state of stress, discussion of the fundamental conservation laws of underlying physics, formulation of initial-boundary value problems and presenting weak (variational) formulations. In the final part the crucial issue of developing techniques for solving specific problems of thermomechanics is addressed. To this aim the authors present a discretized formulation of the governing equations, discuss the fundamentals of the finite element method and develop some basic algorithms for solving algebraic and ordinary differential equations typical of problems on hand. Theoretical derivations are followed by carefully prepared computational exercises and solutions.

Typed PHP : Stronger Types For Cleaner Code / / by Christopher Pitt

• Record Nr.: UNINA9910254759603321
• Autore: Pitt Christopher
• Pubbl/distr/stampa: Berkeley, CA : , : Apress : , : Imprint : Apress, , 2016
• ISBN: 9781484221143; 1484221141
• Edizione: [1st ed. 2016.]
• Descrizione fisica: 1 online resource (XVIII, 76 p. 8 illus., 7 illus. in color.)
• Collana: Expert's Voice
• Disciplina: 005.11
• Soggetti: Computer programming; Programming languages (Electronic computers); Web Development; Programming Techniques; Programming Languages, Compilers, Interpreters
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: Includes index.
• Nota di contenuto: 1. The State of PHP -- 2. Structure -- 3. Extensions -- 4. Design -- 5. Implementation.
• Sommario/riassunto: Discover how stronger types mean cleaner, more efficient, and optimized PHP applications. This unique book looks at typed PHP: PHP types, strings, regular expressions, and more from PHP 7 as found in standard PHP libraries, user libraries, extensions, and cross-compilers. You'll see how to create a set of reusable tools that unify and ease the scalar types of PHP. PHP has a rich history and a dominant place on the web. It has achieved much despite language inconsistencies and difficulties. Bjarne Stroustrup once said: "There are only two kinds of languages: the ones people complain about and the ones nobody uses". PHP is one of those languages that everybody uses, yet that's often seen as a good reason to ignore the bad parts and just get stuff done. We're all for getting stuff done, and to that end, the author has used Plain Ol' PHP for many years. It's always bugged him how procedural PHP is, in an ecosystem of OOP libraries and frameworks. So he decided to take a deeper look at building a stronger type system on top of PHP. That's the goal of this book. What You'll Learn Discover the fundamentals of PHP strings, regex, underscores, native function ; inconsistencies, and more Examine the structure of PHP types including boxing, regex, namespace functions, composer autoload, null problem, optional values, and more Work with extensions like vagrant + phansible, provisioning, vagrant commands, SPL types, scalar objects, zephir, and more Design using scalar, SPL, zephir, structure types, resolving types, chaining, combining number types, PHPUnit, packaging, and more Plan for the future using a case study example.