Download Propagation of Interval and Probabilistic Uncertainty in by Christian Servin, Vladik Kreinovich PDF

By Christian Servin, Vladik Kreinovich

On quite a few examples starting from geosciences to environmental sciences, this

book explains how you can generate an sufficient description of uncertainty, tips to justify

semiheuristic algorithms for processing uncertainty, and the way to make those algorithms

more computationally effective. It explains in what feel the prevailing process to

uncertainty as a mix of random and systematic parts is barely an

approximation, offers a extra enough three-component version with an additional

periodic blunders part, and explains how uncertainty propagation ideas can

be prolonged to this version. The ebook offers a justification for a virtually efficient

heuristic process (based on fuzzy decision-making). It explains how the computational

complexity of uncertainty processing may be lowered. The e-book additionally indicates how to

take under consideration that during genuine existence, the knowledge approximately uncertainty is frequently only

partially recognized, and, on a number of sensible examples, explains easy methods to extract the missing

information approximately uncertainty from the to be had data.

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Extra resources for Propagation of Interval and Probabilistic Uncertainty in Cyberinfrastructure-related Data Processing and Data Fusion

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Let h denote the total number of such cells. This means that as the result of combining prior estimates and estimates corresponding to high spatial resolution model(s), we have h values x f ,1 , x f ,2 , . . , x f ,h . 2 Model Fusion: Case of Probabilistic Uncertainty 47 Derivation. In this case, the above system of linear equations takes the following form: for i = 1, . . , h, we have σ −2 f ,i · (xi − x f ,i ) + 1 · w1,i · 2 σl,1 ∑ w1,i · xi − X1 + i 1 (xi − X1 ) = 0; 2 σe,1 and for i > h, we have 1 · w1,i · 2 σl,1 ∑ w1,i · xi − X1 + i 1 (xi − X1) = 0.

53 Fig. 7. 3 Model Fusion: Case of Interval Uncertainty Main Idea. Our solution to the model fusion problem is to take into account three different types of approximate equalities: • Each higher spatial resolution estimate xi is approximately equal to the actual value xi in the corresponding (smaller size) cell i, with the approximation error xi − xi bounded by the known value Δh,i : xi − Δh,i ≤ xi ≤ xi + Δh,i . • Each lower spatial resolution estimate X j is approximately equal to the average of values of all the smaller cells xi(1, j) , .

A (xm ) > μi (xm ), then min(μa (xm ), μi (xm )) = μi (xm ). In this case, we cannot have μi (xm ) = 1, so we must have μi (xm ) < 1. In this case, by modifying xm a little bit, we can increase the value μi (x) and thus, achieve a larger value of the min(μa (x), μi (x)) – which contradicts to our assumption that the function attains maximum at xm . Similarly, the maximum cannot be attained when μa (xm ) < μi (xm ), so it has to be attained when μa (xm ) = μi (xm ). In this case, the desired maximum d is equal to d = μa (xm ) = μi (xm ).

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