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Modelling Hybrid Programs with Event-B [chapter]

Meryem Afendi, Régine Laleau, Amel Mammar
2020 Lecture Notes in Computer Science  
In this paper, we propose a correct-by-construction approach that implements the reasoning on hybrid programs particularly the reasoning of dRL in Event-B to take advantage of its associated tools.  ...  Based on the differential refinement logic (dRL), a dynamic logic for refinement relations on hybrid systems, it is possible to prove that a Time-Triggered model refines an Event-Triggered model.  ...  Modelling Hybrid Programs with Event-B The objective of the DISCONT project [1] is to elaborate a correct-byconstruction method, based on Event-B, to specify hybrid systems models.  ... 
doi:10.1007/978-3-030-48077-6_10 fatcat:we5xf3l2ivb25ljvm7ir6oo26y

Formal Verification of a Hybrid IoT Operating System Model

Yuqian Guan, Jian Guo, Qin Li
2021 IEEE Access  
This paper proposes a hybrid model for an IoT operating system and employs the Event-B method for modeling and verification.  ...  According to the programming model, IoT operating systems can be categorized into three types: multithreading, event-driven, and hybrid.  ...  ACKNOWLEDGMENT The authors would like to thank Abrial (the inventor of the Event-B method) for his help in modeling verification, Z.  ... 
doi:10.1109/access.2021.3073398 fatcat:ex6rxymf4bhb7imztec4t37twm

Non-monotonic Negation in Hybrid Probabilistic Logic Programs

Emad Saad, Enrico Pontelli
2006 International Symposium on Artificial Intelligence and Mathematics  
It is the first time that two different semantics for Hybrid Probabilistic Programs with nonmonotonic negation as well as their relationships are described.  ...  of original Hybrid Probabilistic Logic programs framework of [23] for programs without negation.  ...  Hybrid Probabilistic Programs In the following subsections, we present the syntax of the proposed Hybrid Probabilistic Programs with nonmonotonic negation.  ... 
dblp:conf/isaim/SaadP06 fatcat:a6js7mw6rnhc7f53vlddtn2d4u

A new approach to hybrid probabilistic logic programs

Emad Saad, Enrico Pontelli
2007 Annals of Mathematics and Artificial Intelligence  
among the events in the program.  ...  In this paper, we extend the language of hybrid probabilistic programs by allowing disjunctive composition functions to be associated with heads of clauses and change its semantics to be more suitable  ...  Let P be a ground h-program and h be a hybrid formula function. Then, h is a probabilistic model of P iff h satisfies P . Definition 15 ([17]). Let [a 1 , a 2 ], [b 1 , b 2 ] ∈ C[0, 1].  ... 
doi:10.1007/s10472-007-9082-1 fatcat:kf7j7dd6gzgj5gvomj34c5v3pe

Model-Based Self-Adaptive Embedded Programs with Temporal Logic Specifications

Li Tan
2006 Proceedings - International Conference on Quality Software  
Our approach works with models, and hence it may be incorporated into existing model-based design workflow: the resulting self-adaptive model can be analyzed using an existing model simulator and may be  ...  temporal logic requirements; we then extend the self-monitoring model with a reconfiguration mechanism based on its REDL specification.  ...  program using an existing model-based code generator.  ... 
doi:10.1109/qsic.2006.41 dblp:conf/qsic/Tan06 fatcat:ulin4py4bjdwlai7jzsgn6e47y

A Formal Framework for Hybrid Event B

Jie Liu, Jing Liu
2014 Electronical Notes in Theoretical Computer Science  
In this paper, we present Hybrid Event B, a formal language for modeling hybrid systems. Specifically, Hybrid Event B is an extension of Event B associating with differential dynamic logic.  ...  The main contribution of this paper is that we give the definition of a differential event in Hybrid Event B, which makes it possible using differential dynamic logic in modeling continuous dynamical systems  ...  This work is partially supported by the projects funded by the 973 Program  ... 
doi:10.1016/j.entcs.2014.12.002 fatcat:cxrph6vianhi5c6opuatvaarl4

A Correct by Construction Approach for the Modeling and the Verification of Cyber-Physical Systems in Event-B [chapter]

Meryem Afendi
2020 Lecture Notes in Computer Science  
models.  ...  One of the most common architectures for CPSs is a discrete software controller which interacts with its physical environment in a closed-loop schema where input from sensors is processed and output is  ...  In our approach we propose to model the high-level structure of hybrid programs in Event-B, and more precisely the generic templates defined for modelling Event and Time-Triggered systems in dRL to take  ... 
doi:10.1007/978-3-030-48077-6_31 fatcat:ecwxfxgtx5gfza322fzuwwkgbq

Towards a UTP Semantics for Modelica [chapter]

Simon Foster, Bernhard Thiele, Ana Cavalcanti, Jim Woodcock
2017 Lecture Notes in Computer Science  
This is a language for modelling a system's continuous behaviour using a combination of differentialalgebraic equations and an event-handling system.  ...  When combined with the wealth of existing UTP theories for discrete system modelling, our work enables a sound approach to heterogeneous semantics for Cyber-Physical systems by leveraging the theory linking  ...  time and discrete event models, and their concurrent simulation to support empirical evaluation.  ... 
doi:10.1007/978-3-319-52228-9_3 fatcat:qdchoo2yo5h5rhjk5briyywqau

Early Experiments with the OpenMP/MPI Hybrid Programming Model [chapter]

Ewing Lusk, Anthony Chan
2008 Lecture Notes in Computer Science  
The paper describes some very early experiments on new architectures that support the hybrid programming model.  ...  We demonstrate the use of a tool that can examine the detailed sequence of events in a hybrid program and illustrate that a hybrid computation might not always proceed as expected.  ...  Basic tests We wrote a simple hybrid Fortran program and instrumented it with MPE.  ... 
doi:10.1007/978-3-540-79561-2_4 fatcat:oikw5eflmfdcrd7elgusr4kfgq

Combining Formal and Informal Methods in the Design of Spacecrafts [chapter]

Mengfei Yang, Naijun Zhan
2016 Lecture Notes in Computer Science  
a formal model using Hybrid CSP (HCSP), which is an extension of CSP for formally modeling hybrid systems.  ...  of attempts have been done (see the related work section); -It provides an option to start the design of a hybrid system with an HCSP formal model, and simulate and/or test it using Matlab platform economically  ...  We thank all of our collaborators with whom the joint work are reported in this chapter, including Prof. Chaochen Zhou  ... 
doi:10.1007/978-3-319-29628-9_6 fatcat:5lnkzjh2mjhlramjaduen4w4d4

Hybrid versus traditional cardiac rehabilitation models: A systematic review and meta-analysis

Congyin Wu, Yan Li, Juan Chen
2014 Kardiologia polska  
In summary, hybrid CR protocols have comparable efficacy to the traditional model.  ...  Therefore, hybrid CR protocols have been developed. In this study, we compared the hybrid and traditional CR models in a meta-analysis framework.  ...  The hybrid model was associated with fewer ECG sessions which contributed to a significant cut to the program costs.  ... 
doi:10.5603/kp.a2018.0175 pmid:30251248 fatcat:dqvyqnehnbfrbap3fmprcyzaci

The SHIFT Programming Language and Run-time System for Dynamic Networks of Hybrid Automata [chapter]

Akash Deshpande, Aleks Göllü, Luigi Semenzato
2000 Verification of Digital and Hybrid Systems  
Components exhibit hybrid behavior, consisting of continuous-time phases separated by discrete-event transitions.  ...  This report presents SHIFT, a programming language for describing dynamic networks of hybrid automata.  ...  a have one transition t1 with two external events b : x and d : z. Let b have t w o transitions t1 and t2. Let t1 h a v e one local event b : x and one external event d : w.  ... 
doi:10.1007/978-3-642-59615-5_17 fatcat:gyljt6d5dvc67cr7qmv7tn7cfy

A general technique for the PLC-Based implementation of RW supervisors with time delay functions

Murat Uzam
2011 The International Journal of Advanced Manufacturing Technology  
effect, the PLC implementation of the hybrid controller with the reduced RW supervisor was not possible.  ...  The reduced RW supervisor offers fewer states for the programmable logic controller (PLC) implementation of the hybrid controller with less memory requirements, but due to a problem called the avalanche  ...  For step 4, if place p is bounded in accordance with M(p) ≤ b, say, then p is modeled by a buffer with capacity b (i.e. b + 1 states).  ... 
doi:10.1007/s00170-011-3817-1 fatcat:as4bpgxrhbekdehrmqfiuxrlbu

Multi-item EOQ model with hybrid cost parameters under fuzzy/fuzzy-stochastic resource constraints: A geometric programming approach

Debdulal Panda, Samarjit Kar, Manoranjan Maiti
2008 Computers and Mathematics with Applications  
In this paper, a multi-item economic order quantity (EOQ) model is considered in which the cost parameters are of fuzzy/hybrid nature under two types of resources -(a) resources as fuzzy quantities; (b  ...  We find the average cost for the model, which is a function of order quantity and demand rate and also of some hybrid parameters.  ...  Letà 1 = (3, 5, 9) (+) (6, 1.2) andà 2 = (6, 7, 10) (+) (7, 1.8) be two hybrid numbers, theñ A 1 ⊕à 2 = [(3, Fuzzy-stochastic programming Probability of a fuzzy event The imprecise events may be  ... 
doi:10.1016/j.camwa.2008.09.010 fatcat:eftvhzfu4zgrjkyl2xvueylsoi

SIGNAL as a model for real-time and hybrid systems [chapter]

Albert Benveniste, Michel Borgne, Paul Guernic
1992 Lecture Notes in Computer Science  
Hybrid Systems axe models of systems operating in real-time and handling events as well as "continuous" computations. The SIGNAL formalism for Hybrid Systems is presented in this extended abstract.  ...  Its expressive power is discussed, and a general method to associate various formal systems with it is presented and illustrated on deriving the present SmNAL compiler.  ...  This very fundamental remark justifies the kind of model for Hybrid System we use in this paper. Our model handles infinite sequences of data with a certain kind of restricted asynchronism.  ... 
doi:10.1007/3-540-55253-7_2 fatcat:wiirwa67cjbfnhiwybu3h34izq
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