The faults of rotating machinery monitored by fixing the sensors on rotor directly brings some problems such as difficulty in fixing the sensors, poor universality and so on, while it brings some advantages such as rapidness, convenience and good universality and so on by fixing the sensors on the base. Since the base is far away from the fault source, the collected vibration signals are relati...

This paper reviews rock friction and the frictional properties of earthquake faults. The basis for rateand state-dependent friction laws is reviewed. The friction state variable is discussed, including its interpretation as a measure of average asperity contact time and porosity within granular fault gouge. Data are summarized showing that friction evolves even during truly stationary contact, ...

This paper presents a logic synthesis tool called BETSY (BIST Environment Testable SYnthesis) for synthesizing circuits that achieve complete (100%) fault coverage in a user specified BIST environment. Instead of optimizing the circuit for a generic pseudo-random test pattern generator (by maximizing its random pattern testability), the circuit is optimized for a specific test pattern generator...

In allusion to more indeterminate information and higher speed request characteristic in fault diagnosis system, according to the intelligence complementary strategy, a new fault diagnosis(SWPSO-BPN) model based on combining improved particle swarm optimization (PSO) algorithm and Back-propagation(BP) neural network is proposed in this paper. In the SWPSO-BPN method, an improved PSO (SWPSO) alg...

The term and characteristic of self-healing, applied to systems, is often seen from different fields of computer science, such as fault tolerance or network and service management, with diverging semantics. Since this impression was confirmed also during the first discussions of the Dagstuhl seminar on ”Self-Healing and Self-Adaptive Systems”, a seminar’s working group on ”Terminology” was form...

In a spirit akin to the sandpile model of selforganized criticality, we present a simple statistical model of the cellular-automaton type which simulates the role of an asperity in the dynamics of a one-dimensional fault. This model produces an earthquake spectrum similar to the characteristic-earthquake behaviour of some seismic faults. This model, that has no parameter, is amenable to an alge...

Induction motors are a critical component of many industrial processes and are frequently integrated in commercially available equipment and industrial processes. The studies of induction motor behavior during abnormal conditions, and the possibility to diagnose different types of faults have been a challenging topic for many electrical machine researchers. The Motor Current Signature Analysis ...

Regarding the wide use of distributed systems in various areas, having a system with fault tolerance ability would be an import characteristic. And in designing the real time distributed systems, this seems to be more considerable. With regard using some middleware like CORBA in designing such systems, and in order to increase their compatibility, speed, performance, to simplify the network pro...

A Compound fault signal usually contains multiple characteristic signals and strong confusion noise, which makes it difficult to separate week fault signals from them through conventional ways, such as FFT-based envelope detection, wavelet transform or empirical mode decomposition individually. In order to improve the compound faults diagnose of rolling bearings via signals' separation, the pre...