A srmphtied method to calculate the excitation spectra of n-electron systems is proposed. The method is based on the assumptton that a "cluster" approxrmation can be apphed to exctted states. It is demonstrated that. for the low-lying triplet and opttcally allowed states of butadtene, hexatriene and
A Decomposition Method to Support the Configuration / Reconfiguration of Production Systems
β Scribed by M. Colledani; T. Tolio
- Publisher
- International Academy for Production Engineering
- Year
- 2005
- Tongue
- English
- Weight
- 625 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0007-8506
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β¦ Synopsis
The configuration phase of a production system is characterized by the need of evaluating a large number of system alternatives. In this phase, a fast and reliable performance evaluation tool able to analyze and explain the behaviour of the system is necessary. The paper proposes an approximate analytical method based on decomposition techniques for modelling and evaluating the performance of production systems involving split and merge of production flows, multiple products, buffers with finite capacity and manufacturing/assembly/disassembly operations. The paper also reports the application of the method to the performance evaluation and reconfiguration of a real system producing white goods.
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