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A system is loosely defined as complex if it is composed of a large number of elements, interacting with each other, and the emergent global dynamics is qualitatively different from the dynamics of each one of the parts. The global dynamics may be either ordered or chaotic and among the most interesting emergent global properties are those of learning and adaptation.Complex systems, in the above sense, appear in many fields ranging from physics and technology to life and social sciences. Research in complex systems involves therefore a wide range of topics, studied in seemingly disparate fields. This calls for some effort to develop general principles and a common language so that tools deve...
Classical synchronous motors are the most effective device to drive industrial production systems and robots with precision and rapidity. However, numerous applications require efficient controls in non-conventional situations. Firstly, this is the case with synchronous motors supplied by thyristor line-commutated inverters, or with synchronous motors with faults on one or several phases. Secondly, many drive systems use non-conventional motors such as polyphase (more than three phases) synchronous motors, synchronous motors with double excitation, permanent magnet linear synchronous motors, synchronous and switched reluctance motors, stepping motors and piezoelectric motors. This book prese...
Her name is undoubtedly less familiar than that of her grandmother, Eleanor of Aquitaine, or that of her famous conqueror son, Fernando III, yet during her lifetime, Berenguela of Castile (1180-1246) was one of the most powerful women in Europe. As queen-consort of Alfonso IX of León, she acquired the troubled boundary lands between the kingdoms of Castile and León and forged alliances with powerful nobles on both sides. Even after her marriage was dissolved, she continued to strengthen these connections as a member of her father's court. On her brother's death, she inherited the Castilian throne outright—and then, remarkably, elevated her son to kingship at the same time. Using her assi...
Au cours des cinquante dernières années, la formation et le métier d'ingénieur ont été totalement refondés. Le transistor a révolutionné l’électronique, l’internationalisation a ouvert les meilleurs laboratoires aux étudiants et aux chercheurs...
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Prefeitura do distrito.