Sentence examples for many challenging issues from inspiring English sources

3D face recognition is a continuously developing subject with many challenging issues [1 3].

The production of hydrocarbons from underground reservoirs is associated with many challenging issues, due particularly to the complex characteristics of reservoirs.

To offer multimedia services in mobile hotspots, many challenging issues need to be addressed due to high mobility and fast channel fading.

The huge demand for real time services in wireless mesh networks (WMN) creates many challenging issues for providing quality of service (QoS).

Nevertheless, it also has many challenging issues, such as large volume expansion, poor electrical conductivity and the formation of unstable solid electrolyte interphase layers.

However, many challenging issues remain unresolved, and the current trends tend to use nature-inspired algorithms and surrogate-based techniques for modelling and optimization.

Though, subthreshold operation of device shows huge potential towards satisfying the ULP requirement, it holds many challenging design issues.

Modelling distributed parameter systems (DPS) by electric circuits and fabricating the complicated equivalent circuits to evaluate system responses poses many challenging research issues for many years.

However, these promising storage services bring many challenging design issues, considerably due to both loss of data control and abstract nature of clouds.

There have been many challenging design issues on Solar-B, as well as the usual problems involved in designing for the hostile space environment, not to mention communication difficulties!

The dilemma underlying many ethically challenging issues is selecting the better of two competing moral goods -- or opting for the least bad between two negative choices.