Hybrid supervisory systems integrate and exchange information between discrete- and continuous-data-based controllers and subsystems. Application areas include process, manufacturing and service industries, healthcare, telecommunication, transportation and logistics, among others.
From the hardware point of view, the rapid progress of information-processing power and its commercial availability has made possible the development of complex supervisory systems. Many barriers that restrained the evolution of supervisory systems in the past have been removed by the recent popularisation of the open-system paradigm. On the other hand, software has not followed the evolution in hardware and both the industrial and scientific communities have pointed out the need for a generic approach that guides the development of hybrid supervisory systems.
Modelling and Analysis of Hybrid Supervisory Systems introduces a modelling formalism that merges Petri nets, differential equation systems and object-oriented methods; a formalism that is adequate for modelling complex and large-scale systems. To guide the designer and conduct hybrid modelling, the book describes a method that starts from the requirements of a supervisory system and results in a proposal for such a system. The method is mainly based on Unified Modelling Language diagrams, well-known tools in both academia and industry. In order to ensure that the supervisory system will behave as expected under any operational circumstances, a validation procedure that allows verification of the formal properties of the hybrid model is presented.
In building a bridge between what is developed in academic research and what is available to the industrial professional, this monograph places particular emphasis on the description of real-world examples; three of these an HVAC management system, a landing system and a cane-sugar factory are discussed at length. It will interest academic researchers working with hybrid systems and their applications and will answer the need of industry-based engineers to unify their control of continuous- and discrete-event systems."
Scars is a novel about whiteness, racism, and breaking past the normative boundaries of heterosexuality, as experienced through eighteen year old Savannah Penelope Sales. Savannah is a Black girl, born and raised in a white, working class, and rural New England town. She is in denial of her lesbian sexuality, harbors internalized racism about her body, and is ashamed of being poor. She lives with her ailing mother whose Emphysema is a symptom of a mysterious past of suffering and sacrifice that Savannah is not privy to. When Savannah takes her first trip to a major metropolitan city for two days, she never imagines how it will affect her return back home to her mother ... or her capacity to not only love herself, but also those who she thought were her enemies. Scars is about the journey of friends and family who love Savannah and try to help her heal, all while they too battle their own wounds and scars of being part of multiple systems of oppression and power. Ultimately, Scars makes visible the psychological trauma and scarring that legacies of colonialism have caused to both the descendants of the colonized and the colonizer ... and the potential for healing and reconciliation for everyone willing to embark on the journey. As a work of social fiction born out of years of critical race, Black feminist, and critical whiteness studies scholarship, Scars engages the reader to think about USA culture through the lenses of race, whiteness, working-class sensibilities, sexual orientation, and how rural geography influences identity. Scars can be used as a springboard for discussion, self-reflection and social reflection for students enrolled in American Studies, Sociology, Women's Studies, Sexuality Studies, African American Studies, human geography, LGBTQ studies and critical whiteness studies courses, or it can be read entirely for pleasure.
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