A foundational question in the theory of linear compartmental models is how to assess whether a model structurally identifiable – that is, parameter values can be inferred from noiseless data directly combinatorics model. Our main result completely answers this for (with one input and output) which underlying graph bidirectional tree; moreover, identifiability such verified visually. Models str...

in this work some quantitative structure activity relationship models were developed for prediction of three bioenvironmental parameters of 28 volatile organic compounds, which are used in assessing the behavior of pollutants in soil. these parameters are; half-life, non dimensional effective degradation rate constant and effective péclet number in two type of soil. the most effective descripto...

The following regularity conditions are made. (A.1) X has full rank p and η ∈ Ω where Ω is an open subset of R p+q+1 that contains η 0. (A.2) Γ γ is twice differentiable with respect to γ with continuous second-order derivatives and is positive definite.

We investigated the relationships between leaders' and their followers' psychological capital and organizational identification in a Chinese community. Participants included 423 followers on 34 work teams, each with its respective team leader. Hierarchical linear models (HLM) were used in the analyses to delineate the relationships among participants' demographic background (gender, age, marita...

a compact formulation of the set of tours neither in a graph nor its complement is presented and illustrates a general methodology proposed for constructing polyhedral models of decision problems based upon permutations, projection and lifting techniques. directed hamilton tours on n vertex graphs are interpreted as (n-1)- permutations. sets of extrema of birkhoff polyhedra are mapped to tours ...