Unveiling and Unraveling Aggregation and Dispersion Fallacies in Group MCDM

Priorities in multi-criteria decision-making (MCDM) convey the relevance preference of one criterion over another, which is usually reflected by imposing the non-negativity and unit-sum constraints. The processing of such priorities is different than other unconstrained data, but this point is often neglected by researchers, which results in...

Ratio product model: A rank-preserving normalization-agnostic multi-criteria decision-making method

This paper presents a new multi-criteria decision-making (MCDM) method, namely the ratio product model (RPM). We first overview two popular aggregating models: the weighted sum model (WSM) and the weighted product model (WPM). Then, we argue that the two models suffer from some fundamental issues mainly due to ignoring the ratio nature of the...

Development of a Modelling Framework for Core Data Integration using XRF Scanning

Sedimentary deposits are important archives of the Earth’s history. In addition, they are of key economical and societal importance because they contain natural resources (e.g., hydrocarbons and drinking water). Hence, it is of utmost importance that we understand the mechanisms controlling the heterogeneity, morphology and spatial distribution...

Modelling the spectral gamma-ray log: The influence of provenance and selective transport

In clastic rock, the interpretation of facies from the spectral gamma-ray log should be applied with caution because a consistent relationship with gamma-ray is lacking due to variations in provenance and/or diagenesis. In this thesis the use of the gamma-ray log for the derivation of source rock characteristics and/or diagenesis is examined....

Weathering of fluvial sands as a compositional linear process: A new modeling approach

Geological data is often compositional (i.e. positive and sum to unity). The constrained nature of compositional data can lead to severe problems during data analysis. Transforming from the simplex to centered log-ratio (CLR) space can solve these problems, converting constrained non-linear processes into unconstrained linear processes ...

Semi-automatic core characterisation based on geochemical logging data

Textural variations in sediment are considered to be one of the primary controls on the geochemical composition. This relation has been widely exploited for the climatological interpretation of unconsolidated Quartenary sediment cores. Despite the common objectives in respectively unconsolidated and consolidated sedimentological studies, for the...