Unfortunately, existing methods are difficult to detect this threat.
However these methods are difficult, time consuming and their results not always consistent.
Traditional survey methods are difficult to use in locating, measuring, recording, and other related tasks.
These methods are difficult to integrate with other ome-wide measurements, tissue context, and morphology in single cells.
However, conventional ridge estimation methods are difficult to extract the targeted ridge from the highly nonstationary signals.
However, most of existing methods are difficult to obtain the real-time values of some key variables in the process.
The mentioned methods are difficult, especially for time-consuming and the need of technical equipment is required.
Conventional nondestructive testing (NDT) methods are difficult to detect, locate and evaluate the internal defect in aluminum tubes in a one-pass scan.
Such methods are difficult to implement on parallel computers because they employ elaborate dynamic data structures to selectively capture localized irregular phenomena.
However, these methods are difficult to use and compare due to differences in the number of criteria used (from 1 to 12).
However, for measuring an aspheric surface with a large departure from a perfect spherical surface, both of these methods are difficult to use.
