By Alessandro Aldini

ISBN-10: 184800222X

ISBN-13: 9781848002227

ISBN-10: 1848002238

ISBN-13: 9781848002234

Concurrency idea, software program structure, method modeling and verification, and dependability and function assessment could seem unrelated disciplines, yet actually they're deeply intertwined and will be a part of an built-in view so that it will effectively deal with the expanding complexity of software program structures today.

This publication introduces a technique algebraic method of software program structure layout. approach algebra, initially conceived for reasoning concerning the semantics of concurrent courses, offers a foundational foundation for the modeling and verification of useful and nonfunctional features of speaking concurrent structures. this is often exploited on the software program structure point of layout to enhance the formality of layout files and make attainable the research of method houses on the early layout stages.

The first a part of the publication bargains an outline of the options and result of method algebra conception offering history fabric at the syntax and semantics for procedure calculi in addition to at the bisimulation, checking out, and hint ways to the definition of behavioral equivalences for nondeterministic, deterministically timed, and stochastically timed processes.

Part provides instructions for a principled transformation of strategy algebra into an architectural description language, ahead of demonstrating the best way to use strategy algebraic options to deal with the detection of architecture-level mismatches, performance-driven choice between substitute designs, and the success of a tradeoff among dependability positive aspects and function indices.

Graduate scholars and software program execs, will discover a procedure Algebraic method of software program structure layout an invaluable addition to their bookshelf.

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3. 4. 5. 6. a . P1 ≈Tr a . P2 for all a ∈ Name. P1 + P ≈Tr P2 + P and P + P1 ≈Tr P + P2 for all P ∈ P. P1 S P ≈Tr P2 S P and P S P1 ≈Tr P S P2 for all P ∈ P and S ⊆ Namev . P1 /H ≈Tr P2 /H for all H ⊆ Namev . P1 \L ≈Tr P2 \L for all L ⊆ Namev . P1 [ϕ ] ≈Tr P2 [ϕ ] for all ϕ ∈ Relab. 6 Trace Equivalence 33 We observe that, although it abstracts from τ -actions, ≈Tr does not incur the congruence problem of ≈B with respect to the alternative composition operator. The reason is the insensitivity of ≈Tr to the branching structure of process terms.

1? 3, in order to answer this question we have to investigate the existence of some relation between PCpipe,2 and ProdCons0/2 . The first step consists of comparing [[PCpipe,2 ]] and [[ProdCons0/2 ]], which are shown below: P ||{d}(LB ||{ p} RB)/{p} ||{w}C deposit ProdCons 0/2 withdraw P ||{d}(LB ||{p} RB)/{ p} ||{w}C τ P || (LB || RB)/{p} || C {d} {p} {w} withdraw deposit P ||{d}(LB ||{ p} RB)/{p} ||{w}C deposit withdraw ProdCons 1/2 deposit withdraw ProdCons 2/2 In addition to the same shorthands as before for process constants and action names on the left-hand side, we have LB for pass .

An ≡ ε and P ≡ P when n = 0. 14. Let P1 , P2 ∈ P. Then: P1 ≈T P2 ⇐⇒ (∀φ ∈ M L T . 3 through the application of the verification algorithm for ∼B to suitable variants of labeled transition systems. 6 Trace Equivalence 31 These are called acceptance graphs and are a particular class of deterministic labeled transition systems, so they have no τ -transitions and none of their states has multiple transitions labeled with the same action. Every state of an acceptance graph is labeled with two pieces of information, which are a Boolean and a family of sets of visible actions, respectively.

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A Process Algebraic Approach to Software Architecture Design by Alessandro Aldini

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