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The change detection and diagnosis methods have gained considerable attention in scientif c research and appears to be the central issue in various application areas. These applications need some robust change detection schemes to work well and separate the changes in the experimental conditions from the real changes in the system, especially for systems with arbitrary and non-stationary known or...
Interleavers are important blocks from turbo codes structure, their type and dimensions having a significant influence on the performances of the mentioned codes. The permutation polynomial (PP) based interleavers lead to remarkable performances of these codes, if they are appropriately chosen. The most used interleavers from this category are quadratic permutation polynomials (QPPs) and cubic permutation...
Increasing the performances of turbo codes used in communication systems is an important issue at the moment. The method used for trellis termination influences the code performances. This paper describes and compares (in terms of bit error rate - BER and frame error rate - FER) four types of these methods: without trellis termination, termination only of the first trellis, post-interleaver flushing...
Change detection problem refers to the detection of abnormal regimes and incipient faults of electrical circuits, devices or equipments. The problem is coming more and more important as the requirements for high and constant quality, low maintenance and high reliability of complex electronic products are continuously increasing. Classical methods use statistical signal processing techniques, various...
In national power network there are still many IO-type oil-based high-voltage circuit breakers, which are acted by oleo-pneumatic mechanisms (MOP). Changing them with new ones is not an easy task, due to their huge number in the power networks and the implementing costs. From all breaker components, MOP presents the highest fault rate. In this paper, modeling aspects of MOP-type drive mechanisms are...
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