Component-Based software engineering provides an opportunity for better quality and increased productivity in software development by using reusable software components [10]. One of the most critical aspects of the quality of a software system is its performance. The systematic application of software performance engineering techniques throughout the development process can help to identify des...

analyzing the nonlinear vibration of beams is one of the important issues in structural engineering. according to this, an impressive analytical method which is called modified iteration perturbation method (mipm) is used to obtain the behavior and frequency of a cantilever beam with geometric nonlinear. this new method is combined by the mickens and iteration methods. moreover, this method don...

The purpose of this study is to investigate the impact of estimation techniques and sample sizes on model fit indices in structural equation models constructed according to the number of exogenous latent variables under multivariate normality. The performances of fit indices are compared by considering effects of related factors. The Ratio Chi-square Test Statistic to Degree of Freedom, Root Me...

Speech enabled interfaces and spoken dialog sys−tems are mostly based on statistical speech and language processing modules. Their behavior is therefore not deterministic and hardly predictable. This makes the simulation and the optimization of such systems performances difficult, as well as the reuse of previous work to build new systems. In the aim of a partially automated optimization of suc...

Refinement via annotations is a common practice in Model-Driven Engineering (MDE). For instance, in the case of our Model-Driven Performance Engineering (MDPE) architecture, we are required to annotate different types of process models with performance objectives, constraints and other information. This is used to enable domain experts, such as business analysts, to benefit from an automated pe...

This chapter presents a case study in performance engineering. The case study consists of a Software Retrieval System based on agents. The system is modelled in a pragmatic way using the Uniied Modeling Language and in a formal way using stochastic Petri Nets. Once the system has been modelled, performance gures are obtained from the formal model. Finally, some concluding remarks are obtained f...

Multifrequency composites seems to be a good approach to increase the acoustic bandwidth of standard piezoelectric composites. The mechanical coupling between the different piezoceramic elements introduces new degrees of freedom into their design. Monodimensional models have been developed to study their performances in a first approximation. In order to obtain a powerful design model, a two-di...