The Experts below are selected from a list of 102 Experts worldwide ranked by ideXlab platform
Javier Camara - One of the best experts on this subject based on the ideXlab platform.
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theorem proving for product line model verification
Lecture Notes in Computer Science, 2004Co-Authors: Mike Mannion, Javier CamaraAbstract:Product line models of requirements can be used to drive the selection of requirements of new systems in the product line. Validating any selected single system is difficult because product line models are large and complex. However by modelling variability and dependency between requirements using propositional connectives a Logical Expression can be developed for the model and then selection validation can be achieved by satisfying the Logical Expression. This approach can be used to validate the model as a whole. A case study with nearly 800 requirements is presented and the computational aspects of the approach are discussed.
Mike Mannion - One of the best experts on this subject based on the ideXlab platform.
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theorem proving for product line model verification
Lecture Notes in Computer Science, 2004Co-Authors: Mike Mannion, Javier CamaraAbstract:Product line models of requirements can be used to drive the selection of requirements of new systems in the product line. Validating any selected single system is difficult because product line models are large and complex. However by modelling variability and dependency between requirements using propositional connectives a Logical Expression can be developed for the model and then selection validation can be achieved by satisfying the Logical Expression. This approach can be used to validate the model as a whole. A case study with nearly 800 requirements is presented and the computational aspects of the approach are discussed.
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using first order logic for product line model validation
Software Product Lines, 2002Co-Authors: Mike MannionAbstract:Product line models are used to drive the generation of requirements for single systems in the product line. They are difficult to validate because they are large and complex. By modelling variability and dependency between requirements using propositional connectives, a Logical Expression can be developed for the model. Validation of the selection of requirements from the model can be achieved by satisfying the Logical Expression. This approach can be used to validate the model as a whole. A detailed worked example is presented, and the computational aspects of the approach are discussed.
Kenzo Nonami - One of the best experts on this subject based on the ideXlab platform.
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structural controller for Logical Expression of linear constraints on petri nets
IEEE Transactions on Automatic Control, 2020Co-Authors: Jiliang Luo, Mengchu Zhou, Hui Shao, Kenzo NonamiAbstract:Based on the P-type composition of Petri nets (PNs) defined in this paper, a framework for a structural control of discrete event systems (DESs) is constructed such that a closed-loop PN is obtained by composing a plant PN and a controller. As for a disjunction or conjunctive normal form (CNF) of linear constraints, a new approach is proposed to design a structural controller in this framework. First, a switching-net is defined for a disjunction of constraints, and an extended plant is obtained through the P-type composition of a plant PN and switching-net. Second, the disjunction of bounded constraints is transformed into a conjunction of switching-constraints on the extended plant. Third, a controller is synthesized by designing monitors for conjunctive switching-constraints according to a supervision-based-on-place-invariant method. Fourth, in a similar manner, a controller is also designed for a CNF of bounded constraints. The resulting controller is maximally permissive if each disjunction of constraints meets the jump-free condition, and its size grows polynomially with the number of constraints. Another advantage is that the closed-loop system is still a PN for many real DES since a CNF can describe not only convex but also nonconvex state regions.
Jiliang Luo - One of the best experts on this subject based on the ideXlab platform.
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structural controller for Logical Expression of linear constraints on petri nets
IEEE Transactions on Automatic Control, 2020Co-Authors: Jiliang Luo, Mengchu Zhou, Hui Shao, Kenzo NonamiAbstract:Based on the P-type composition of Petri nets (PNs) defined in this paper, a framework for a structural control of discrete event systems (DESs) is constructed such that a closed-loop PN is obtained by composing a plant PN and a controller. As for a disjunction or conjunctive normal form (CNF) of linear constraints, a new approach is proposed to design a structural controller in this framework. First, a switching-net is defined for a disjunction of constraints, and an extended plant is obtained through the P-type composition of a plant PN and switching-net. Second, the disjunction of bounded constraints is transformed into a conjunction of switching-constraints on the extended plant. Third, a controller is synthesized by designing monitors for conjunctive switching-constraints according to a supervision-based-on-place-invariant method. Fourth, in a similar manner, a controller is also designed for a CNF of bounded constraints. The resulting controller is maximally permissive if each disjunction of constraints meets the jump-free condition, and its size grows polynomially with the number of constraints. Another advantage is that the closed-loop system is still a PN for many real DES since a CNF can describe not only convex but also nonconvex state regions.
Tang Zhimin - One of the best experts on this subject based on the ideXlab platform.
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Timing Logical Expression Based on DDR SDRAM Controller Signals
Computer Engineering, 2005Co-Authors: Tang ZhiminAbstract:The paper defines the clock unit stepping function and proposes a kind of timing Logical Expression for DDR SDRAM controller signals, establishing the timing sequential Expression of the major signals through the analysis of the burst read/write operation of the DDR SDRAM controller. And its also gives an example of application using this kind of timing Expression. This method can be used to estimate the static timing delay value and bandwidth of the main memory channel.