Sentence examples for is still a difficult problem from inspiring English sources

However, flexible treatment of complicated free surface behavior such as fragmentation and coalescence of liquids is still a difficult problem.

However, choosing the best combination of algorithmic skeletons to yield good parallel speedups for a specific program on a specific parallel architecture is still a difficult problem.

In the current computational fluid dynamics (CFD) research, it is still a difficult problem to extend the higher-order Euler solver to the NS one due to the change of governing equations from hyperbolic to parabolic type and the initial interface discontinuity.

However, choosing an efficient and implementable nonexpansive mapping is still a difficult problem.

However, choosing an efficient and implementable nonexpansive mapping for a general VI(F, K) is still a difficult problem.

However, it is still a difficult problem in visual SLAM to discriminate the moving objects from the stationary landmarks in dynamic environments.

Notwithstanding many years of progress, visual tracking is still a difficult but important problem.

Transient stability constrained optimal power flow (TSCOPF) is still a difficult but important problem in power system planning and operation.

Coordinating the interactions of applications running on the diversity of both mobile and embedded devices that will be common in ubiquitous computing environments is still a difficult and not completely solved problem.

However, besides the problems with getting data, the evaluation of PHC is still a difficult and controversial task.

Faced with so many discrete choice models, how to choose an appropriate one to simulate travel behavior is still a rather difficult problem.