03552nam 2200361za 450 991083019500332120230725023600.09781444324273 (e-book)9781444324266 (pbk.)(MiAaPQ)EBC547193(EXLCZ)99267000000002958020100309d2010 uy 0engur|n|---|||||Electrical installation calculations[electronic resource] for compliance with BS 7671 : 2008 /Mark Coates, Brian Jenkins4th ed.Chichester Wiley20101 online resource (xix, 192 p.) illIncludes index.Previous ed.: 2003.1. Calculation of the cross-sectional areas of circuit live conductors -- 2. Calculation of voltage drop under normal loadconditions -- 3. Calculation of earth fault loop impedance -- 4. Calculations concerning protective conductor cross-sectional area -- 5. Calculations related to short circuit conditions -- 6. Combined examples -- Appendix: The touch voltage concept -- Index.Manual calculations are still extensively used and in particular are necessary for checking and verifying various software calculation design packages. It is highly recommended that users of such software familiarise themselves with the rudiments of these calculations prior to using the software packages. This essential book fills the gap between software and manual calculations. It provides the reader with all the necessary tools to enable accurate calculations of circuit designs. Rather than complex equations, this book uses extensive worked examples to make understanding the calculations simpler. The focus on worked examples furnishes the reader with the knowledge to carry out the necessary checks to electrical cable sizing software programmes. Other key features include: Updated information on 230 volt references and voltage drop under normal load conditions; New sections on buried cables that take into account soil thermal conductivity, trenches and grouping, allowing readers to carry out accurate cables sizing; Information and examples of steel wired armour cables, new to this edition. This includes sufficiency during short circuits and, for cables with externally run CPCs, gives unique fault conditions. Covers: calculations of cross-sectional areas of circuit live conductors; Earth fault loop impedances; Protective conductor cross-sectional areas and short circuit conditions; Short circuit protection. The last chapter combines all of the calculations of the previous chapters to enable the reader to complete an accurate design of an installation circuit under all conditions. A unique tool for detailed electrical installation trade, Electrical Installation Calculations, fourth edition is invaluable to electricians, electrical designers, installers, technicians, contractors, and plant engineers. Senior electrical engineering students and technical colleges, junior engineers, and contracts managers will also find this text useful.Electric wiringMathematicsElectric wiringStandardsGreat BritainElectric wiringMathematics.Electric wiringStandards621.31924Jenkins Brian D(Brian David)856699Coates M(Mark)856700Electrical Contractors' Association (Great Britain)9910830195003321Electrical installation calculations1913331UNINA04207nam 22006735 450 991073147360332120251009101019.0981-9931-69-X10.1007/978-981-99-3169-9(CKB)27113548000041(MiAaPQ)EBC30603278(Au-PeEL)EBL30603278(DE-He213)978-981-99-3169-9(PPN)272273589(EXLCZ)992711354800004120230619d2023 u| 0engurcnu||||||||txtrdacontentcrdamediacrrdacarrierDeriving Priorities from Incomplete Fuzzy Reciprocal Preference Relations Theories and Methodologies /by Yejun Xu1st ed. 2023.Singapore :Springer Nature Singapore :Imprint: Springer,2023.1 online resource (180 pages)9789819931682 Chapter 1. Introduction -- Chapter 2. Normalizing Rank Aggregation-based Method -- Chapter 3. Eigenvector Method -- Chapter 4. Logarithmic Least Squares Method -- Chapter 5. A Chi-Square Method -- Chapter 6. A Least Deviation Method -- Chapter 7. Priorities from Fuzzy Best Worst Method Matrix -- Chapter 8. Weighted Least Square Method -- Chapter 9. Priorities from Incomplete Hesitant Fuzzy Reciprocal Preference Relations.As we know, multiplicative preference relations (or called pairwise comparisons in AHP) were proposed by Dr. Thomas L Saaty. One important work is to derive its priority from pairwise comparisons. It has been proposed many methods to derive priority for multiplicative preference relation. On the basis of fuzzy sets, the fuzzy reciprocal preference relation is proposed and is extended to the incomplete contexts. However, how to derive the priorities from incomplete fuzzy reciprocal preference relations is an interesting and challenging work. This book systematically presents the theories and methodologies for deriving priorities from incomplete fuzzy reciprocal preference relations. This book can be divided into three parts. In the first part, this book introduces the basic concepts of fuzzy reciprocal preference relations and incomplete fuzzy reciprocal preference relations. Then, two consistencies of complete fuzzy reciprocal preference relations are introduced: additive consistency and multiplicative consistency. Then, the relationships between the fuzzy reciprocal elements and the weights are showed. Afterward, in the second part, different priority methods are presented. The inconsistency repairing procedures are also proposed. Last, the priority method for incomplete hesitant fuzzy reciprocal preference relations is presented. This book can be used as a reference for researchers in the areas of management science, information science, systems engineering, operations research, and other relevant fields. It can also be employed as a textbook for upper-level undergraduate students and graduate students.Artificial intelligenceComputer scienceInformation modelingMachine theoryAlgorithmsArtificial IntelligenceModels of ComputationInformation ModelFormal Languages and Automata TheoryDesign and Analysis of AlgorithmsComputer Science Logic and Foundations of ProgrammingArtificial intelligence.Computer science.Information modeling.Machine theory.Algorithms.Artificial Intelligence.Models of Computation.Information Model.Formal Languages and Automata Theory.Design and Analysis of Algorithms.Computer Science Logic and Foundations of Programming.511.3223Xu Yejun1368807MiAaPQMiAaPQMiAaPQBOOK9910731473603321Deriving Priorities from Incomplete Fuzzy Reciprocal Preference Relations3394829UNINA