Study on uncertainty of geospatial semantic Web services composition based on broker approach and Bayesian networks

Yang, Xiaodong; Cui, Weihong; Liu, Zhen; Ouyang, Fucheng

doi:10.1117/12.812526

Cited by 1 publication

(1 citation statement)

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“…A Bayesian framework for probabilistic service composition is given in [38] where plausible reasoning services are developed by using historical QoS data, recorded by brokers; uncertainty is represented using Bayesian networks. Bayesian games have also been used to analyse security risks.…”

Section: Related Workmentioning

confidence: 99%

Analysing Web-Orchestrations Under Stress Using Uncertainty Profiles

Gabarró

Serna

Stewart

2013

The Computer Journal

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An orchestration is a multi-threaded computation which invokes a number of remote services. In practice the responsiveness of a web-service fluctuates with demand; during surges in activity service responsiveness may be degraded, perhaps even to the point of failure. An uncertainty profile formalises a user's perception of the effects of stress on an orchestration of web-services; it describes a strategic situation, modelled by a zero-sum angel-daemon game. Stressed webservice scenarios are analysed, using game theory, in a realistic way, lying between over-optimism (services are entirely reliable) and over-pessimism (all services are broken). The "resilience" of an uncertainty profile can be assessed using the valuation of its associated zero-sum game. In order to demonstrate the validity of the approach we consider two measures of resilience and a number of different stress models. It is shown how (i) uncertainty profiles can be ordered by risk (as measured by game valuations) and (ii) the structural properties of risk partial orders can be analysed.

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Section: Related Workmentioning

confidence: 99%