Sentence examples for a challenge problem is from inspiring English sources

Several questions remain to be investigated in our future work: 1) A challenge problem is the lack of large benchmark datasets for evaluation the scalability of the proposed method.

Indeed, the challenge problem is exactly an example of a missing value estimation problem, for which many algorithms have been developed [21].

To demonstrate that the proposed method can be applied to model validation problems successfully, a validation benchmark, the static frame challenge problem, is implemented.

A few days after the challenge problem was posted in the hallway, he was lingering by the snack cart again when Thays arrived.

Thus, how to obtain the accurate CSI in a low-complexity manner for multiple AF-relays-assisted broadband cooperative diversity systems could be a challenge problem and has not been satisfactorily addressed, which motivates our present work.

Considering the diversity of objects in texture, shape and pose, object labeling is still a challenge problem, though there have been several approaches dealing with this problem [1, 15, 22, 23].

It is a challenge problem to numerically describe the nodal fingering effects.

The second test is a challenge problem for any existing rarefied flow solver.

Prediction of protein structural class for low-similarity sequences is a challenge problem.

It is a challenge problem to protect bidding prices.

As he sees it, Republicans face a marketing challenge: the problem is the box, not the pizza.