Sentence examples for main difficulties lie from inspiring English sources

The main difficulties lie in determining the initial value at the starting time and simulating improper integrals more efficiently.

The main difficulties lie in uncertainties of FE modeling and errors related to modal testing (Lin 1990).

The main difficulties lie in two folds: First, how to develop adaptive backstepping control scheme for nonlinear strict-feedback systems with time delays by relaxing the restrictions of the time-delayed functions with all state variables.

The main difficulties lie in two aspects.

The main difficulties lie in dressing, use of the toilet, and personal hygiene.

Main difficulties lie in choosing appropriate indicators and the subsequent assignment of weights, avoiding under or over estimation, and standards.

One of the main difficulties lies in handling the nonlocal term (frac{lambda f t, u(t))}{(int_{0}^{t}f x, u(x)),dx)^{2}}), representing a heat source and that depends continuously on time; another one in the fact that electrical conductivity depends on both time and temperature.

Those are persons whose main difficulty lies in their absence of dee emotional response, their inability to profit from experience, & their disregard for social mores.

"The main difficulty lies in finding good suppliers, because many of the processes are still manual, artisanal," says Mr. Metsavaht of Osklen.

The main difficulty lies in finding a suitable internal model.

Second, the main difficulty lies in evaluating prior bounds.