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( Varinia González Estevez ) 부경대학교 글로벌지역학연구소 2018 Journal of Global and Area Studies(JGA) Vol.2 No.1
Research on cities is an essential contribution to understanding the identity processes, especially when they are perceived in a close relation with people relation with the man who creates and inhabits cultural spaces. Those that have addressed the urban growth of Santiago de Cuba in different historical moments are within this range of research. The period between 1820 and 1829 is characterized by the economic and commercial takeoff, when the area adjacent to the bay of Santiago became a closely related area to the port and, therefore, commercial function of the city; the city had formed in a random way in the early years of the nineteenth century. This research aims at analyzing the image of the city through the study of the plan of 1823, and reflection the urban transformation that took place in the northwest and southwest, adjacent to the coast. The analysis also relies on primary sources of time: testimonies, epistles and reports, which describe how these processes of construction and consumption of space occur to hive in this peripheral area of the city, nerve center of commercial life in relation to the port of Santiago de Cuba.
Prediction-observer Scheme for Linear Systems with Input-output Time-delay
Varinia Fragoso-Rubio,Martín Velasco-Villa,Miguel A. Hernández-Pérez,Basilio del Muro-Cuéllar,Juan Francisco Márquez-Rubio 제어·로봇·시스템학회 2019 International Journal of Control, Automation, and Vol.17 No.8
This work deals with the prediction and control problems associated with a class of linear systems with time-delay at the input-output path. A general prediction observer scheme that estimates the future value of the delayed system from the output is proposed. Later, a full-information predictor-observer is introduced and the convergence of the estimated future values is formally proven for a time-delay τ of any size by increasing the dimension of the proposed predictor-observer. The estimated future state is used to design a feedback law that compensates the delay effects on the original system. The performance of the prediction-observation control strategy is shown by means of numerical simulations. Thus, it is illustrated that the performance of the proposed full-information predictor-observer is improved with respect to the sequential sub-predictors previously presented in the literature.