Fast Fourier Transform

https://pure.tue.nl/ws/files/3733415/845663329264403.pdf

Uncertainty analysis in building performance simulation for design support

http://inis.jinr.ru/sl/tot_ra/0/0/3/cacuci-sensitiv.pdf

SENSITIVITY and UNCERTAINTY ANALYSIS

1. In a rapidly changing world, ecology has the potential to move from empirical and conceptual stages to application and management issues. It is now possible to make large-scale predictions up to continental or global scales, ranging from the future distribution of biological diversity to changes in ecosystem functioning and services. With these recent developments, ecology has a historical opportunity to become a major actor in the development of a sustainable human society. With this opportunity, however, also comes an important responsibility in developing appropriate predictive models, correctly interpreting their outcomes and communicating their limitations. There is also a danger that predictions grow faster than our understanding of ecological systems, resulting in a gap between the scientists generating the predictions and stakeholders using them (conservation biologists, environmental managers, journalists, policymakers).
2. Here, we use the context provided by the current surge of ecological predictions on the future of biodiversity to clarify what prediction means, and to pinpoint the challenges that should be addressed in order to improve predictive ecological models and the way they are
understood and used. 
3. Synthesis and applications. Ecologists face several challenges to ensure the healthy development of an operational predictive ecological science: (i) clarity on the distinction between explanatory and anticipatory predictions; (ii) developing new theories at the interface between
explanatory and anticipatory predictions; (iii) open data to test and validate predictions; (iv) making predictions operational; and (v) developing a genuine ethics of prediction.

/pdf/review-predictive-ecology-in-a-changing-world-41l0w5bwnr.pdf

REVIEW: Predictive ecology in a changing world

Progress in dynamic simulation of thermal power plants

In the last four decades, large efforts have been undertaken to provide reliable thermal-hydraulic system codes for the analyses of transients and accidents in nuclear power plants. Whereas the first system codes, developed at the beginning of the 1970s, utilized the homogenous equilibrium model with three balance equations to describe the two-phase flow, nowadays the more advanced system codes are based on the so-called “two-fluid model” with separation of the water and vapor phases, resulting in systems with at least six balance equations. The wide experimental campaign, constituted by the integral and separate effect tests, conducted under the umbrella of the OECD/CSNI was at the basis of the development and validation of the thermal-hydraulic system codes by which they have reached the present high degree of maturity. However, notwithstanding the huge amounts of financial and human resources invested, the results predicted by the code are still affected by errors whose origins can be attributed to several reasons as model deficiencies, approximations in the numerical solution, nodalization effects, and imperfect knowledge of boundary and initial conditions. In this context, the existence of qualified procedures for a consistent application of qualified thermal-hydraulic system code is necessary and implies the drawing up of specific criteria through which the code-user, the nodalization, and finally the transient results are qualified.

/pdf/thermal-hydraulic-system-codes-in-nulcear-reactor-safety-and-3swdfbr4fx.pdf

Thermal-Hydraulic System Codes in Nulcear Reactor Safety and Qualification Procedures

Methodology for the reliability evaluation of a passive system and its integration into a Probabilistic Safety Assessment

Uncertainty methodology based on accuracy extrapolation (UMAE) is outlined. This methodology is suitable for evaluating the uncertainty in the prediction of transient scenarios in nuclear reactors ...

Francesco Saverio D'Auria

Papers

Thermal-Hydraulic System Codes in Nulcear Reactor Safety and Qualification Procedures

Methodology for the reliability evaluation of a passive system and its integration into a Probabilistic Safety Assessment

Outline of the uncertainty methodology based on accuracy extrapolation

Passive Safety Systems and Natural Circulation in Water Cooled Nuclear Power Plants

Transient and stability analysis in single-phase natural circulation