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Abstract

The main goal of the paper is to show the value of texts preserved in more than one version for studies aimed at identifying reasons for the demise of words. The data selected is a set of six non-surviving English preterite-present verbs. The analysis of the material shows that mediaeval manuscripts often exhibit orthographic and morphological variation as well as differ in lexemes. Such differences prove to be useful for the search of factors leading to the elimination of the verbs in question.
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Abstract

The supply chain of spare parts is the intersection between the supply chain, the after-sales and the maintenance services. Some authors have tried to define improvement paths in terms of models to satisfy the performance criteria. In addition, other authors are directed towards the integration of risk management in the demand forecasting and the stock management (performance evaluation) through probabilistic models. Among these models, the probabilistic graphical models are the most used, for example, Bayesian networks and petri nets. Performance evaluation is done through performance indicators. To measure the appreciation of the supply of the spare parts stock, this paper focuses on the performance evaluation of the system by petri nets. This evaluation will be done through an analytical study. The purpose of this study is to evaluate and analyze the performance of the system by proposed indicators. First, we present a literature review on Petri nets which is the essential tool in our modeling. Secondly, we present in the third section the analytical study of the model based on bath deterministic and stochastic petri networks. Finally, we present an analysis of the proposed model compared to the existing ones.
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