Sentence examples for normally difficult to obtain from inspiring English sources

In addition, performance weighting function which is normally difficult to obtain is automatically determined by PSO.

Since it is normally difficult to obtain a closed form solution, finite element approximations of optimal control problems governed by partial differential equations have been extensively studied in the literature.

Although it's normally difficult to obtain brand-name rights in China so quickly, the Chinese authorities apparently saw this as a payback in return for Trump's backing away from recognizing Taiwan.

For other than elementary flows the latter would normally not be available, and extremely difficult to obtain if at all.

Palestinian construction is normally allowed here, but permits are very difficult to obtain.

Since vehicle lateral states are difficult to obtain, the state feedback controller normally requires vehicle full-state feedback is a critical challenge for vehicle lateral dynamics control.

Weight loss over the last 6 months was significantly more prevalent among those categorized as malnourished vs. normally nourished (15 vs. 3 patients; p<.0001), but was difficult to obtain or assess in 17 (30%) patients.

Since complete darkness is difficult to obtain, experiments were performed in a normally illuminated environment.

Details are difficult to obtain.

Some are extremely difficult to obtain.

Clear information proved, in the end, difficult to obtain.