The detection of outliers has gained considerable interest in data mining with the realization that outliers can be the key discovery to be made from very large databases. Outliers arise due to various reasons such as mechanical faults, changes in system behavior, fraudulent behavior, human error and instrument error. Indeed, for many applications the discovery of outliers leads to more interes...

Silicic calderas form during explosive volcanic eruptions when magma withdrawal triggers collapse along bounding faults. The nature of specific interactions between magmatism and tectonism in caldera-forming systems is, however, unclear. Regional stress patterns may control the location and geometry of magma reservoirs, which in turn may control the spatial and temporal development of faults. H...

In this paper we evaluate the performance of Gallager-B algorithm, used for decoding low-density paritycheck (LDPC) codes, under unreliable message computation. Our analysis is restricted to LDPC codes constructed from circular matrices (QC-LDPC codes). Using Monte Carlo simulation we investigate the effects of different code parameters on coding system performance, under a binary symmetric com...

We investigate the performances and collective task-solving capabilities of complex networks of automata using the density problem as a typical case. We show by computer simulations that evolved Watts–Strogatz small-world networks have superior performance with respect to scale-free graphs of the Albert– Barabási type. Besides, Watts–Strogatz networks are much more robust in the face of transie...

the oudna field part of the offshore northeastern tunisia, straddles between two structural domains, the tunisian atlas to the north and the pelagian sea to the south. the study of this field has confirmed adequate petroleum system in fahdene formations (albian-cenomanian) and birsa (serravallian) resulting from the combination of several sedimentary, tectonic and thermal factors. to do this, w...

Physical faults include bridging faults, break (open) faults, transistor stuck-on and transistor stuck-off. Compared to traditional gate-level stuck-at faults, physical faults more closely represent realistic faults appearing at the gate level and transistor level. Analytical modelling for such faults, used for design and testability, is still a new and emerging area. Undetectable bridging faul...

the model are two pairs of probability density maps. The first pair consists of smoothed seismicity and weighted focal mechanisms based on observed earthquakes. The second pair corresponds to mapped faults and their slip rates and consists of smoothed momentrate and weighted focal mechanisms based on fault geometry. We construct from the model a “stochastic event set”, i.e. a large set of simul...

The significant advantages of permanent magnet synchronous motors, such as very good dynamic properties, high efficiency and power density, have led to their frequent use in many drive systems today. However, like other types electric they are exposed various faults, including stator winding faults. Stator faults mainly inter-turn short circuits among the most common motors. In this paper, poss...

Changes in the physicochemical conditions of process unit, even under control, may lead to what are generically referred to as faults. The cognition of causes is very important, because the system can be diagnosed and fault tolerated. In this article, we discuss and propose an artificial neural network that can detect the incipient and gradual faults either individually or mutually. The mai...