Simple and accurate models based on adaptive-network-based fuzzy inference system (ANFIS) to compute the physical dimensions of open supported coplanar waveguides are presented. The ANFIS is a class of adaptive networks which are functionally equivalent to fuzzy inference systems. Four optimization algorithms, hybrid learning, simulated annealing, least-squares, and genetic, are used to determine optimally the design parameters of the ANFIS. When the performances of ANFIS models are compared with each other, the best results are obtained from the ANFIS models trained by the hybrid learning algorithm. The results of ANFIS are compared with the results of the conformal mapping technique, the rigorous spectral-domain hybrid mode analysis, the improved spectral domain approach, the synthesis formulas, a full-wave electromagnetic simulator IE3D, and experimental works realized in this study.
This paper presents a dynamic approach to the synthesis of a crank-rocker four-bar mechanism, that is obtained by an optimization problem and its solution using the swarm intelligence algorithm called Modified-Artificial Bee Colony (M-ABC). The proposed dynamic approach states a mono-objective dynamic optimization problem (MODOP), in order to obtain a set of optimal parameters of the system. In this MODOP, the kinematic and dynamic models of the whole system are consider as well as a set of constraints including a dynamic constraint. The M-ABC algorithm is adapted to solve the optimization problem by adding a suitable constraint-handling mechanism that is able to incorporate the kinematic and dynamic constraints of the system. A set of independent computational runs were carried out in order to validate the dynamic approach. An analysis from the mechanical and computational point of view is presented, based on the obtained results. From the analysis of the simulation and its results, it is shown that the solutions for the proposed algorithm lead to a more suitable design based on the dynamic approach.
Autor se pokusil o dílčí komentář k osmisvazkovému projektu Archeologie pravěkých Čech, a to z pozice aktivního účastníka přípravy syntéz pravěku Čech z roku 1978 i 2007–2008. Nová syntéza uspokojivě shrnuje výsledky českého terénního výzkumu i stav zpracování pramenů, ale – podle názoru autora – faktografické limity domácích pramenů spolu s dnešní úrovní integrace výsledků humanitních a přírodních věd omezují možnosti jejich celistvého interpretačního využití. Další rozvoj, resp. přežití oboru bude záviset dílem na míře úspěšnosti integrace českého výzkumu v rámci Evropy, dílem na schopnosti archeologů přesvědčit domácí veřejnost, že péčí a hospodařením s archeologickými prameny plníme nepominutelnou společenskou objednávku nadnárodního dosahu. and The author comments on the eight-volume Archeologie pravěkých Čech [Archaeology of Prehistoric Bohemia] from the position of an active participant in the preparation of the synthesis of information concerning prehistoric Bohemia in 1978 and 2007–2008. This new synthesis provides a satisfactory summary of the results of Czech field research as well as the state of the processing of sources. However, in the opinion of the author, the factographic limits of domestic sources together with today’s unsatisfactory integration of the results of the humanities and natural sciences restricts the possibilities of their cohesive interpretive use. Further progress, or even the survival of the field, will depend in part on the success of the integration of Czech research into the framework of Europe and in part on the ability of archaeologists to convince the public that care and management of archaeological sources is a vital social mission of supranational importance.