01580ojm 2200253z- 450 991014890470332120230912161814.00-00-811300-9(CKB)3710000000923704(BIP)050978158(EXLCZ)99371000000092370420231107c2016uuuu -u- -engTorn: A Terrified Girl. A Shocking Secret. A Terrible ChoiceHarperCollins UKExperienced foster carer Rosie Lewis faces a battle to uncover the dark family secret that is tearing a family apart.Rosie is used to looking after children from difficult home situations, but she finds herself struggling when she agrees to take in Taylor and her younger brother, Reece, for a short while. Taylor tries desperately not to fit in, to be the tough young teen that she has had to become, making it clear that she cares about nothing and no-one, while Reece is just desperate for someone to love him. Rosie finds herself battling an unknown monster in their past, as social media and the Internet become a means to control and manipulate the siblings while in her care. And then a more sinister turn of events causes Rosie to dig into their past, desperate to discover the truth before her time with them is over and they must be returned to their family.Torn362.733092Lewis Rosie1452558Gould MadelineothAUDIO9910148904703321Torn: A Terrified Girl. A Shocking Secret. A Terrible Choice3654408UNINA04377nam 2200709 a 450 991082146040332120240401200016.01-118-79162-21-118-79148-71-118-79145-2(CKB)2550000001111879(EBL)1441766(OCoLC)857662917(SSID)ssj0001034935(PQKBManifestationID)11562950(PQKBTitleCode)TC0001034935(PQKBWorkID)11016785(PQKB)10675660(MiAaPQ)EBC1441766(Au-PeEL)EBL1441766(CaPaEBR)ebr10748682(CaONFJC)MIL511771(PPN)185469310(EXLCZ)99255000000111187920130829d2013 uy 0engur|n|---|||||txtccrControl of switching systems by invariance analysis application to power electronics /Laurent Fribourg, Romain Soulat1st ed.London ISTE20131 online resource (146 p.)FOCUS series,2051-2481"FOCUS systems engineering series"--Cover.1-84821-606-8 1-299-80520-5 Includes bibliographical references and index.Cover; Title Page; Contents; Preface; Acknowledgments; Introduction; Chapter 1. Control Theory: Basic Concepts; 1.1. Model of control systems; 1.2. Digital control systems; 1.2.1. Digitization; 1.2.2. Quantization; 1.2.3. Switching; 1.3. Control of switched systems using invariant sets; 1.3.1. Controlled invariants; 1.3.2. Safety control problem; 1.3.3. Stability control problem; 1.3.4. Other controllers; 1.4. Notes; Chapter 2. Sampled Switched Systems; 2.1. Model; 2.2. Illustrative examples; 2.3. Zonotopes; 2.4. Notes; Chapter 3. Safety Controllers3.1. Backward fixed point computation (direct approach)3.2. Approximate bisimulation (indirect approach); 3.3. Application to a three-cell Boost DC-DC converter; 3.3.1. Model; 3.3.2. Direct method; 3.3.3. Indirect method; 3.4. Notes; Chapter 4. Stability Controllers; 4.1. Motivation; 4.2. Preliminaries; 4.2.1. Control induced by the decomposition; 4.3. Decomposition function; 4.3.1. Basic procedure; 4.3.2. Enhancement for safety; 4.4. Limit cycles; 4.4.1. Discussion of the assumptions H1 and H2; 4.4.2. Illustrative examples; 4.5. Implementation; 4.6. NotesChapter 5. Application to Multilevel Converters5.1. Multilevel converters; 5.2. Application of the decomposition procedure; 5.2.1. Five-level converter; 5.2.2. Seven-level converter; 5.3. Physical experimentations; 5.4. Notes; Chapter 6. Other Issues: Reachability, Sensitivity, Robustness and Nonlinearity; 6.1. Reachability control; 6.2. Sensitivity; 6.3. Robust safety control; 6.4. Nonlinearity; 6.5. Notes; Conclusions and Perspectives; Appendix 1. Sufficient Condition of Decomposition; Appendix 2. Applications of the Enhanced Decomposition Procedure; Appendix 3. Proof of Theorem 4.3This book presents correct-by-design control techniques for switching systems, using different methods of stability analysis. Switching systems are increasingly used in the electronics and mechanical industries; in power electronics and the automotive industry, for example. This is due to their flexibility and simplicity in accurately controlling industrial mechanisms. By adopting appropriate control rules, we can steer a switching system to a region centered at a desired equilibrium point, while avoiding "unsafe" regions of parameter saturation.The authors explain various correct-by-Focus series (London, England).Focus series in systems engineering.Switching circuitsSystem analysisPower electronicsSwitching circuits.System analysis.Power electronics.621.381537Fribourg Laurent906321Soulat Romain906322International Society for Technology in Education.MiAaPQMiAaPQMiAaPQBOOK9910821460403321Control of switching systems by invariance analysis2026919UNINA