The group with the least severe neonatal symptoms showed a few discrete neuropsychological difficulties, but was more intelligent and performed better in school than the group with the most severe neonatal symptoms.
In the case of discrete systems, a difficulty appears from the outset in the sense that the discrete analogue of the Painlevé property, namely singularity confinement, does not guarantee integrability.
In this context, obtaining an expression for the structure function becomes difficult, compared to the discrete case, with difficulty increasing as the number of components of the system increases.
Rather than discrete events, general difficulty in school(s) impacted their subsequent life.
However, these economic models, which tend to be formulated in discrete time, can present difficulties both in linking with natural science-based models formulated in continuous time and in representing the ongoing development of environmental phenomena over time.
The main difficulty of discrete fracture approach is the need for extensive computation involved in reservoir scale flow simulation.
Previous work has shown that the continuous solver differential evolution (DE) can be successfully applied to this discrete problem, but has difficulty exploring the region of solutions with lowest resonant frequency.
The full test (parts 1 and 2) takes approximately 15 min and consists of 60 multiple-choice questions with increasing levels of difficulty, including discrete multiple-choice questions and multiple-choice cloze questions (i.e., text passages with gaps that have to be filled with one of three or four alternatives).
It also demonstrated the difficulty in identifying discrete depositional episodes and occupation surfaces, because of the intense bioturbation.
Due to the non-monotonous behaviour for this type of the optimization problems, the extended BESO method using discrete design variables has its difficulty to obtain convergent solutions for such problems.
