05564nam 22004935 450 991035031530332120180829130310.0981-13-0230-810.1007/978-981-13-0230-5(CKB)4100000005958195(MiAaPQ)EBC5501073(DE-He213)978-981-13-0230-5(EXLCZ)99410000000595819520180827d2019 u| 0engurcnu||||||||txtrdacontentcrdamediacrrdacarrierDesign Sensitivity Analysis and Optimization of Electromagnetic Systems[electronic resource] /by Il Han ParkSingapore :Springer Singapore :Imprint: Springer,2019.1 online resource (376 pages) illustrationsMathematical and Analytical Techniques with Applications to Engineering,1559-7458Includes index.981-13-0229-4 1. Introduction -- 1.1 Optimal Design Process -- 1.2 Design Steps of Electromagnetic System -- 1.3 Design Variables -- 1.4 Equations and Characteristics of Electromagnetic Systems -- 1.5 Design Sensitivity Analysis -- 2. Variational Formulation of Electromagnetic Systems -- 2.1 Variational Formulation of Electrostatic System -- 2.2 Variational Formulation of Magnetostatic System -- 2.3 Variational Formulation of Eddy Current System -- 2.4 Variational Formulation of DC Conductor System -- 3. Continuum Shape Design Sensitivity of Electrostatic System -- 3.1 Material Derivative and Formula -- 3.2 Shape Sensitivity of Outer Boundary -- 3.3 Shape Sensitivity of Outer Boundary for System Energy -- 3.4 Shape Sensitivity of Interface -- 3.5 Shape Sensitivity of Interface for System Energy -- 4. Continuum Shape Design Sensitivity of Magnetostatic System -- 4.1 Interface Shape Sensitivity -- 4.2 Interface Shape Sensitivity for System Energy -- 5. Continuum Shape Design Sensitivity of Eddy Current System -- 5.1 Interface Shape Sensitivity -- 5.2 Interface Shape Sensitivity for System Power -- 6. Continuum Shape Design Sensitivity of DC Conductor System -- 6.1 Shape Sensitivity of Outer Boundary -- 6.2 Shape Sensitivity of Outer Boundary for Joule loss power -- 7. Level Set Method and Continuum Sensitivity -- 7.1 Level Set Method -- 7.2 Coupling of Continuum Sensitivity and Level Set Method -- 7.3 Numerical Considerations -- 8. Hole and Dot Sensitivity for Topology Optimization -- 8.1 Hole Sensitivity -- 8.2 Dot Sensitivity -- Appendix A. More Examples of Electrostatic System -- Appendix B. More Examples of Magnetostatic System -- Appendix C. More Examples of Eddy Current System -- Appendix D. More Examples of DC Conductor System.This book presents a comprehensive introduction to design sensitivity analysis theory as applied to electromagnetic systems. It treats the subject in a unified manner, providing numerical methods and design examples. The specific focus is on continuum design sensitivity analysis, which offers significant advantages over discrete design sensitivity methods. Continuum design sensitivity formulas are derived from the material derivative in continuum mechanics and the variational form of the governing equation. Continuum sensitivity analysis is applied to Maxwell equations of electrostatic, magnetostatic and eddy-current systems, and then the sensitivity formulas for each system are derived in a closed form; an integration along the design interface. The book also introduces the recent breakthrough of the topology optimization method, which is accomplished by coupling the level set method and continuum design sensitivity. This topology optimization method enhances the possibility of the global minimum with minimised computational time, and in addition the evolving shapes during the iterative design process are easily captured in the level set equation. Moreover, since the optimization algorithm is transformed into a well-known transient analysis algorithm for differential equations, its numerical implementation becomes very simple and convenient. Despite the complex derivation processes and mathematical expressions, the obtained sensitivity formulas are very straightforward for numerical implementation. This book provides detailed explanation of the background theory and the derivation process, which will help readers understand the design method and will set the foundation for advanced research in the future.Mathematical and Analytical Techniques with Applications to Engineering,1559-7458ElectronicsProduction of electric energy orElectronics and Microelectronics, Instrumentationhttp://scigraph.springernature.com/things/product-market-codes/T24027Continuous Optimizationhttp://scigraph.springernature.com/things/product-market-codes/M26030Power Electronics, Electrical Machines and Networkshttp://scigraph.springernature.com/things/product-market-codes/T24070Electronics.Production of electric energy or.Electronics and Microelectronics, Instrumentation.Continuous Optimization.Power Electronics, Electrical Machines and Networks.621.30151825Park Il Hanauthttp://id.loc.gov/vocabulary/relators/aut909797BOOK9910350315303321Design Sensitivity Analysis and Optimization of Electromagnetic Systems2035903UNINA01931nam 2200409 450 991071468760332120230609091712.0(CKB)3710000000295079(NjHacI)993710000000295079(OCoLC)1137548407(OCoLC)993710000000295079(EXLCZ)99371000000029507920230609d2003 uy 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierElection Reform and Electronic Voting Systems (DREs) Analysis of Security Issues (RL32139) /Eric A. Fischer[Library of Congress public edition].Washington, D.C. :Congressional Research Service,2003.1 online resource (37 pages)CRS report for CongressThe CRS report home page provides access to all versions published since 2018 in accordance with P.L. 115-141; earliest version dated 2003.Report includes bibliographical references.This report discusses several questions about voting-system security. To address these questions, this report begins with a description of the historical and policy context of the controversy. That is followed by an analysis of the issues in the broader context of computer security. The next section discusses several proposals that have been made for addressing those issues, and the last section discusses options for action that might be considered by policymakers.Election lawUnited StatesElection law342.7307Fischer Eric A.1361581Library of Congress.Congressional Research Service,NjHacINjHaclBOOK9910714687603321Election Reform and Electronic Voting Systems (DREs)3380191UNINA