In simulation tests of dynamic states of the power system (PS), the database of parameters of mathematical models of generating units is most commonly used. In many cases, the parameter values are burdened with large errors. Consequently, the results obtained are not reliable and do not allow drawing true conclusions. This monograph presents the developed methods and tools supporting the process of measurement determination of reliable values of parameters of mathematical models of synchronous generators and excitation systems. Special measurement tests are the basis for determining the parameters. The tests can be carried out in conditions of normal operation of generating units, in which electrical machines operate in the state of saturation of magnetic cores, and voltage regulators can reach limits. This book is intended for specialists in power engineering as well as students of faculties of electrical engineering interested in issues of PS transient states.
Andrzej Franaszek’s award-winning biography of Czeslaw Milosz—winner of the Nobel Prize in Literature—recounts the poet’s odyssey through WWI, the Bolshevik revolution, the Nazi invasion of Poland, and the USSR’s postwar dominance of Eastern Europe. This edition contains a new introduction by the translators, along with maps and a chronology.
This work, taking the form of a culinary book, is at the same time the result of ethnobotanical and botanical research conducted by members of the BG PAS conservation botany team - Dr Marcin Kotowski, Alidovar Sodatsairov and the director of BG PAS, Prof. Arkadiusz Nowak, in cooperation with scientists from the Central Asian University in Khorog - Dr Murodbek Laldjebaev and Barfiya Palavonshanbieva. In this book, the authors aim to bring both Polish- and English-speaking readers a picture of the nature of Central Asia through the prism of local culinary culture and related folk beliefs. The publication was funded by the Activity of Dissemination of Science of the Polish Academy of Sciences.
The intention of this book is to reveal and discuss some aspects of the metal fo- ing plasticity theory. The modern theory describes deformation of metallic bodies in cold and hot regimes under combined thermal and mechanical loadings. Th- mal and deformation fields appear in metal forming in various forms. A thermal field influences the material properties, modifies the extent of plastic zones, etc. and the deformation of metallic body induces changes in temperature distribution. The thermal effects in metal forming plasticity can be studied at two levels, - pending on whether uncoupled or coupled theories of thermo-plastic response have to be applied. A majority of metal forming processes can be satisfactorily studied within an uncoupled theory. In such an approach the temperature enters the stress-strain relation through the material constants and through the thermal dilatation. The description of thermo-plastic deformation in metal forming is c- ried out on the ground of thermodynamics.
This book presents the up-to-date status of quantum theory and the outlook for its development in the 21st century. The covered topics include basic problems of quantum physics, with emphasis on the foundations of quantum theory, quantum computing and control, quantum optics, coherent states and Wigner functions, as well as on methods of quantum physics based on Lie groups and algebras, quantum groups and noncommutative geometry.
A woman scientist discovers that a meltdown in a nuclear reactor was caused by a bug in a computer chip. She informs the manufacturer. The company's owner, a member of the military-industrial complex, has her killed to silence her. So begins a thriller starring lady FBI agent Esther Cruz.
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