The difficulty for design teams and the requirements community is arriving at a good estimate of what a particular configuration may look like, as well as what technologies are needed to enable it, given a set of strict requirements.
A large gap of rheological properties between the raw and pretreated lignocellulose raised a difficulty for designing proper pretreatment reactors with maximum efficiency and minimum power consumption.
Another difficulty for designing predictable behaviour in interconnected modules is the fact that different connected modules might have varying sensitivity to the intra- and intercellular environment.
However, exchanges inside the spray mixture are difficult to express as combined mass and heat are transferred between phases, resulting in difficulties for the design of spraying systems.
If (10) is fulfilled, the feedback AD in Fig. 4 produces two unstable poles in the open-loop transfer function from i ref to i L1 or i L2, yielding some difficulties for robust design [27, 31].
Two coalescent kettle holes at Borras Bog constitute a natural obstacle on the route of the A5156 Llanypwll Link Road and posed difficulties for highway design and construction.
These rigid inclusions can significantly change the entire stress distribution in the membrane and therefore create major difficulties for the design.
The most characteristic features of MOOCs massification, heterogeneity and the absence of a tutor, differ entirely from online academic training, and these extreme training characteristics present greater difficulties for the design of MOOCs than for other online courses (Fidalgo-Blanco, García-Peñalvo & Sein-Echaluce, 2013).
Exons show very little variability for the phylogenies of closely related species, whereas intergenic regions present difficulties for the design of primers of wide-specificity.
It is proved that the in-plane system is weak minimum phase by selecting a proper Lyapunov candidate function, and there are some difficulties for controller designing based on nonlinear model directly.
One also observes the constant difficulties of designing sustainable schemes for bus companies.
