domingo, 31 de maio de 2020

[Rever] Industrial control and protection logic network

https://www.researchgate.net/figure/Industrial-control-and-protection-logic-network_fig1_250386614


[...] Very high reliability figures cannot be formally justified for a piece of software. Failure probabilities lower than 1E-4 are rarely claimed or justified even in a highly diversified software system, and there is not an accepted approach for the use of quantitative evaluation for software reliability between the different countries. The situation is even more difficult concerning figures for software CCF. The current state of the art for the quantification of software reliability relies mostly on holistic approaches, such as conformance to appropriate safety standards such as IEC 61508, or statistical testing. The EU Euratom FP7 project HARMONICS (Harmonised Assessment of Reliability of Modern Nuclear I&C Software) will tackle the problem of software reliability quantification using analytical and Bayesian approaches that take into consideration all the information available, in particular evidence obtained by V&V.

[...] The logic network works for supporting logical inference of Bayesian network. In the result of some learning experiments using interactive data, we have confirmed that the proposed interactive learning method is useful for scene context reasoning.