00871nam0-22003011i-450 99000172828040332120190705122613.00-08-034202-7000172828FED01000172828(Aleph)000172828FED0100017282820030910d1988----km-y0itay50------baeng<<An >>introduction to farm organisation and managementMaurice Buckett2nd ed.OxfordPergamon Press1988IX, 338 p.25 cmEconomia aziendale agricola658.93Buckett,Maurice74796ITUNINARICAUNIMARCBK99000172828040332160 658.93 BUCM 19881550FAGBCFAGBCIntroduction to farm organisation and management360166UNINA04333nam 22005775 450 991098613110332120250310115239.09789819631490981963149110.1007/978-981-96-3149-0(CKB)37817229200041(MiAaPQ)EBC31955465(Au-PeEL)EBL31955465(DE-He213)978-981-96-3149-0(OCoLC)1506234079(EXLCZ)993781722920004120250310d2025 u| 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierParity-Time Symmetric Wireless Power Transfer /by Bo Zhang, Xujian Shu, Lihao Wu1st ed. 2025.Singapore :Springer Nature Singapore :Imprint: Springer,2025.1 online resource (342 pages)CPSS Power Electronics Series,2520-88619789819631483 9819631483 Introduction -- PT Symmetric Principle and Circuits -- PT Symmetric Wireless Power Transfer System and Its Characteristics -- Transfer Characteristics of Constant Power and Constant Efficiency Against Misalignment -- Transfer Characteristics of Constant Power and Constant Efficiency Against Distance -- Transfer Characteristics of Constant Voltage / Constant Current -- Multi-Load PT Symmetric Wireless Power Transfer System -- High-Order PT Symmetric Wireless Power Transfer System With Relay Coils -- Techniques for Improving Performances of PT Symmetric Wireless Power Transfer -- Electric-Field Coupling PT Symmetric Wireless Power Transfer System -- Inductive and Capacitive Dual-Coupled PT Symmetric Wireless Power Transfer System.This book belongs to the subject of Electric Engineering, and involves the concept of PT symmetry in quantum mechanics. It presents a concise and insightful view of the knowledge on PT symmetric circuits. This book first offers an overview of the development and challenges of wireless power transfer technology, as well as the introduction of PT symmetry in wireless power transfer, and then briefly introduces PT symmetry and its representation in circuits, so as to present the realization methods of negative resistor as the key component of PT symmetric circuits. On this basis, PT symmetric wireless power transfer systems are constructed, and their characteristics, including constant power, constant efficiency, constant voltage and constant current, are analyzed. Therein, the system designs and implementations are also mentioned. Next, the various techniques for improving performances of PT symmetric wireless power transfer, such as improvement of transfer distance, reduction of switching frequency and losses, etc. Moreover, the basic structures, transfer characteristics, system designs and implementations of different types of PT symmetric wireless power transfer systems are proposed, including multi-load system, multi-relay coil system, capacitive coupled system, inductive and capacitive dual-coupled system. Therefore, this book provides readers with enough background and understanding to go deeper in the topic of PT symmetric wireless power transfer, so that this book can be used as a textbook for courses related to PT symmetric circuits, PT symmetric wireless power transfer, etc. This book is intended for students without an extensive mathematical background, and is suitable for advanced undergraduate and graduate students, engineers and researchers who focus on the PT symmetric circuits, PT symmetric wireless power transfer systems.CPSS Power Electronics Series,2520-8861Power electronicsElectronic circuitsPower ElectronicsElectronic Circuits and SystemsPower electronics.Electronic circuits.Power Electronics.Electronic Circuits and Systems.621.381044Zhang Bo875254Shu Xujian1790666Wu Lihao1790667MiAaPQMiAaPQMiAaPQBOOK9910986131103321Parity-Time Symmetric Wireless Power Transfer4327399UNINA04929nam 2200625 a 450 991100474310332120200520144314.01-282-54175-797866125417591-85617-829-3(CKB)2530000000000375(EBL)535215(OCoLC)555545454(SSID)ssj0000332087(PQKBManifestationID)12117192(PQKBTitleCode)TC0000332087(PQKBWorkID)10330575(PQKB)10834271(MiAaPQ)EBC535215(EXLCZ)99253000000000037520091023d2010 uy 0engur|n|---|||||txtccrWorking guide to pumps and pumping stations calculations and simulations /E. Shashi Menon and Pramila S. Menon1st ed.Burlington, MA Gulf Professional Pub.c20101 online resource (298 p.)Description based upon print version of record.1-85617-828-5 Includes bibliographical references and index.Front Cover; Working Guide to Pumps and Pumping Stations; Copyright Page; Contents; Preface; Author Biography; Chapter 1 Introduction; Types of Pumps; Liquid Properties; Energy of a Flowing Liquid and Bernoulli's Equation; Pump Head and Capacity; Summary; Problems; Chapter 2 Pump Performance; Manufacturers' Pump Performance Curves; Power Required by a Pump: Hydraulic and Brake Horsepower; Pump Driver and Power Required; Multistage Pumps; Specific Speed; Summary; Problems; Chapter 3 Liquid Properties versus Pump Performance; Temperature Rise of Liquid Due to Pump InefficiencyStarting Pump against a Closed Discharge ValveSystem Head Curve; Pipe Diameters and Designations; Summary; Problems; Chapter 4 Pressure Loss through Piping Systems; Velocity of Flow; Types of Flow; Pressure Drop Due to Friction; Determining the Friction Factor from the Moody Diagram; Calculating the Friction Factor: the Colebrook Equation; Explicit Equations for the Friction Factor; Hazen-Williams Equation for Pressure Drop; Pressure Loss through Fittings and Valves; Entrance and Exit Losses, and Losses Due to Enlargement and Contraction; Pipes in Series and ParallelHead Loss in Series PipingHead Loss in Parallel Piping; Summary; Problems; Chapter 5 System Head Curves; Pump Throttling and Power Loss; Types of System Head Curves; Summary; Problems; Chapter 6 Pump Performance at Different Impeller Sizes and Speeds; Calculating the Impeller Diameter or Speed for a Specific Operating Point; Summary; Problems; Chapter 7 NPSH and Pump Cavitation; Summary; Problems; Chapter 8 Pump Applications and Economics; Pumps in Series and Parallel; Economics of Pumping Systems; Summary; Problems; Chapter 9 Pump Simulation Using PUMPCALC Software; Single Pump SimulationSimulating Impeller Diameter and Speed ChangeSimulating Impeller Trim for a Design Point; Viscosity Correction Example; Summary; Appendices; Appendix A: Summary of Formulas; Chapter 1; Chapter 2; Chapter 3; Chapter 4; Chapter 6; Chapter 7; Chapter 8; Appendix B: Units and Conversion Factors; Appendix C: Properties of Water - USCS Units; Appendix D: Properties of Common Liquids; Appendix E: Properties of Circular Pipes - USCS Units; Appendix F: Properties of Circular Pipes - SI Units; Appendix G: Head Loss in Water Pipes - USCS Units; Appendix H: Darcy Friction FactorsAppendix I: Least Squares MethodReferences; Index; A; B; C; D; E; F; H; I; L; M; N; P; R; S; T; V A plain language guide to the tools and techniques needed to ensure efficiency, Working Guide to Pump and Pumping Stations provides practicing engineer and senior field personnel with a quick but rigorous exposition of pumps, including applications. In this book, readers find expert advice for determining TDH, NPSH, BHP and driver power requirements, discharge temperature, parallel/series operation and their impact on the operating conditions; developing system-head curves and performance considerations; pump selection for multi-product operations. The book also emphasizes the understandingPetroleum pipelinesEquipment and suppliesHandbooks, manuals, etcPetroleum pipeline pumping stationsHandbooks, manuals, etcPumping machineryHandbooks, manuals, etcPetroleum pipelinesEquipment and suppliesPetroleum pipeline pumping stationsPumping machinery621.6/9Menon E. Shashi1823929Menon Pramila S1823930MiAaPQMiAaPQMiAaPQBOOK9911004743103321Working guide to pumps and pumping stations4390877UNINA