This paper describes a NASA-funded project to develop reliability analysis software capable of modeling complex, highly dynamic systems over the duration of a mission, taking into account variation in input parameters and the evolution of the system. It is designed as an extension to GoldSim, a simulation program which is widely used for Performance Assessment in the nuclear arena, most notably...

The main goal of this paper is to structurally analyze impact of DSM programs on reliability indices. A new approach is presented to structurally decompose reliability index Expected Energy Not Supplied (EENS) by using Monte Carlo simulation. EENS is decomposed into two terms. The first term indicates EENS which is caused by generation contingencies. The second term indicates EENS which is caus...

This paper describes a simulation method for reliability assessment of electrical distribution systems. The method has been implemented in the reliability assessment tool RADPOW which now is able to perform both analytical and simulation evaluations. The implemented method is validated by comparing results from application studies made for an electrical distribution system in the Stockholm area...

We discuss the advantages and disadvantages of a functional approach to clustering of spatial-temporal data. This leads us to suggest an alternative methodology which allows cluster memberships to vary over both temporal and spacial domains. One advantage of our approach is that it can easily incorporate time-varying covariates. A fitting algorithm is developed and we provide a simple simulatio...

A large number of commercial simulation tools support performance oriented studies of complex computer and communication systems. Reliability of these systems, when desired, must be obtained by remodeling the system in a different tool. This has obvious drawbacks: (i) substantial extra effort is required to create the reliability model, (ii) through modeling error the reliability model may not ...

Conventionally design principles for spoken dialogue systems are drawn either from experiences or from corpus-based analysis. However, human experiences are usually not precise enough for engineering design, while for corpus-based analysis many factors such as speech recognition or understanding performance and user’s behavior can never be precisely controlled. Recently, a new design/analysis a...

A new approach to the evaluation of the reliability of electrical systems is presented. In this approach a Graph Trace Analysis based approach is applied to integrated system models and reliability analysis. The analysis zones are extended from the traditional power system functional zones. The systems are modeled using containers with iterators, where the iterators manage graph edges and are u...