Sentence examples for usually difficult to achieve from inspiring English sources

Unfortunately, perfect dose uniformity is usually difficult to achieve when treating samples with a complex shape.

It is usually difficult to achieve fairness in two-party protocols.

Although one-dimensional quantizers yield reasonably good performances, a problem remains: independency between all feature dimensions is usually difficult to achieve.

Moreover, uniform dispersion of catalysts in a reactor is usually difficult to achieve by stirring, and the aggregation of numerous catalysts may affect their performance.

This is usually difficult to achieve because of the lack of suitable patients and patient safety regulations.

The CAs-CHIP is, therefore, expected to enable the integration of universal pretreatment processes by using different kinds of chemically-functionalized capillary and multilayer flow-based chemical processes; this is usually difficult to achieve using other reported techniques.

Thus, correct and scientific decision-making is usually very difficult to achieve by only a single DM, because of time pressure and the limitation of the information-processing capacity, expertise, and experience.

We decided to include a larger group of mice in experiment 3 because it is usually more difficult to achieve clinical improvement in longstanding disease.

When the initial frequency offset is large (close to half the subcarrier spacing), it usually becomes rather difficult to achieve global solution convergence.

In the past, the measurement of settling velocity has been a relatively unattractive laboratory technique, being usually time-consuming and difficult to achieve a useful throughput of samples.

This is known as "circular breathing" and can be very difficult to achieve, usually resulting in the breath-holder losing both air reserves.