The phrase respective existing is correct and usable in written English.
You can use this phrase when two or more things have different traits, but you want to stress the fact that each one exists in its own right. For example, "The two countries have their respective existing political systems."
Both have done remarkably well commercially, probably because they offer clear extensions of the respective brands' existing principles.
An interview guide was used with questions focusing on contextual factors influencing the conduct of HSR within the country and specifically at the respective SPH, existing policies, available human and financial resources, and staff motivation for HSR.
"The strong and reputable Scottish brand is driving up demand as our exporters continue to seize on the opportunities that exist in new and existing markets in their respective fields.
Chromosome identity was ascribed to unlinked markers and marker linkage groups by comparison with the respective marker affinities on existing Atlantic salmon mapping panels [ 45].
This can be done with the deformation of an existing atlas respective to measured fiducials during the experiment, like in our case, or with the help of individual anatomically-resolved scans (MRI, X-Ray).
The results after investigation show a considerable improvements in terms of their evaluation measures as compared to the existing methods on respective databases.
Performance of the proposed method is tested by conducting three experiments on benchmark image databases and retrieval results show a significant improvement in terms of their evaluation measures as compared to other existing methods on respective databases.
The results after being investigated show a significant improvement in terms of average precision, average recall and average retrieval rate on DB1 database and average retrieval rate on texture databases (DB2 and DB3) as compared with most of existing techniques on respective databases.
This discussion indicates that our approach has identified many potential gene markers that are also shown to be associated with the respective cancer types in different existing studies.
