The phrase "as mentioned in the introduction a" is not correct in written English due to the abrupt truncation at the end.
It can be used when referring back to information that was previously stated in the introduction of a text, but it needs to be completed for clarity.
Example: "As mentioned in the introduction, a thorough understanding of the topic is essential for success."
Alternatives: "as stated in the introduction" or "as noted in the introduction".
As mentioned in the introduction, a fourth-order polynomial model was used in [20] for representing ten consecutive LSF values.
As mentioned in the introduction, a computer program was developed to design different vessel configurations by using the Arnold and Stewart procedure.
As mentioned in the introduction, a key problem is to stop requiring line managers to understand the details of the many different types of graphs and charts, to not have then think like analysts.
As mentioned in the Introduction, a growth-size correlation may not be due to large size causing faster growth, but to the fact that faster-growing trees are larger.
As mentioned in the introduction, a recent biomechanical study [11] by the authors showed that when a tension band is added to the re-fixation of a Chevron osteotomy with a cancellous screw, the re-fixated Chevron osteotomy is able to withstand significant higher forces applied to the triceps compared to the cancellous screw alone.
As mentioned in the introduction, a carrier size of 10 200 nm in diameter is appropriate for in vivo delivery since larger particles (D>200 nm) are eliminated by the reticuloendothelial system, and they also have short life-time [17] in the cardiovascular system whereas the small particles (D<10 nm) escape by renal clearance [18].
As mentioned in the " Introduction", ASAXS as a method has been known for a long time.
As mentioned in the Introduction, scCO2 has a very low solvating ability with highly polar compounds.
As mentioned in the introduction, PRKCA is a predicted miR-34c target.
As mentioned in the introduction, SMARTS is an extension to the SMILES format.
As mentioned in the introduction ongoing pain is a common characteristic and core symptom in TM.
