Sentence examples for are difficult to be attained from inspiring English sources

In other words, magnetic core volume is the most significant factor determining the inductance value, and the size and thickness reductions are difficult to be attained unless the magnetic properties of magnetic materials are improved [39].

In fact ηa is shown to be limiting, such that values over ηa > 50% are difficult to attain.

During the summer, ferry reservations are difficult to attain.

Such conditions are difficult to attain in large WSNs.

Because video marketing offers a way to grab search market share for keywords that are difficult to attain via normal, text-based search.

Reliable multiple alignments of C-subunit sequences are difficult to attain as long as no 3D-structures are available.

Risk assessments are important under conditions of low risk when estimates are difficult to attain from trials.

The naturalness that Mr. Malick was after was difficult to attain with a digital approach, said Dan Glass, the film's senior visual effects supervisor, speaking of some of the more hallucinatory passages in "The Tree of Life".

Rapid fabrication of dense ceramic structures with high-purity and complex geometry is of high demand, however, it is difficult to attain by traditional solid-phase sintering.

This equilibrium is difficult to attain and even more difficult to change.

But he conceded it would be difficult to attain that goal.