The phrase "are not only valid" is correct and usable in written English.
It can be used when discussing the validity of multiple points or arguments, often in a context where you are about to present additional information or contrasting ideas.
Example: "These theories are not only valid, but they also provide a comprehensive understanding of the phenomenon."
Alternatives: "are not just valid" or "are more than valid".
Finally, four of the six flow regime maps are not only valid for fully developed flow, but also developing flow.
Experiments confirm that our results are not only valid to FGN model, but also able to offer reference to estimate the autocorrelation of other self-similar models, such as fractional auto-regression integrated moving average.
A final ingredient is that all the above assumptions are not only valid at an instant but remain true in the course of time.
Some of the issues raised are not only valid in an OC context, but also for other forward distribution structures (e.g., shorter lead time with decentralization).
Due to the assumption of perfect DIC, the performance limits presented below are not only valid for the system concept proposed by the authors, but can also be applied to other multiplexing techniques like TDM.
But with eyes wide open I have concluded that fairy tales and their messages are not only valid and reflect the very way we are wired, they represent tremendous universality in the crafting of myriad aspects of happiness: Magic in all its incarnations, color, drama, love, lust, beauty, art -- both the virtuous and the dark side -- are all essential ingredients in living life to the fullest.
The mechanism is not only valid for TDIROF but also for other electrodes because it is independent of the electrode material.
The computation approach is not only valid for membrane covered electrodes, but is suitable for other experimental set ups where a one-dimensional Fickian diffusion model is valid, for example, for axial diffusion through cylindrical geometries.
Finally, a three-stage empirical study is conducted to validate the proposed models, compare them with the traditional distance-based methods, and the result shows that our approach is not only valid but also outperforms the traditional methods.
