It is not grammatically correct to use "many previous research" as a standalone phrase in a sentence.
The article "many" should be followed by a plural noun, so it should either be "many previous studies" or "much previous research." Correct example: Many previous studies have shown the positive effects of exercise on mental health. Incorrect example: Many previous research suggests that exercise can improve mental health.
These frames are of particular importance since they have been the focus of many previous research studies under earthquake excitations.
Many previous research works are carried out to investigate the local and overall interactive buckling behavior and ultimate load-carrying capacity of thin-walled columns.
While analysis of hybrid systems that depend on diesel generators as backup sources can be found in many previous research works, detailed techno economic analysis of hybrid systems that depend on microturbines as backup sources are less addressed.
Many previous research efforts have been focused on the mid-surface abstraction, including the model decomposition based methods, Medial Axis Transform (MAT) based methods and Chordal Axis Transform (CAT) based methods.
Many previous research works also divided occupations into two or three categories (e.g., Liu and Zhang 2004).
In fact, many previous research studies have focused on fair bandwidth allocation in wireless networks [2 9].
However, many previous researches have only emphasized on one of the two trends.
Many previous researches have concentrated on the noise reduction of the axial flow fan by changing the tip clearance and blade shape of the trailing edge (TE).
As demonstrated in the Interplanetary Kite-craft Accelerated by Radiation Of the Sun (IKAROS), reflectivity control devices (RCDs) are switched on or off independently with each other, which has nevertheless been ignored by many previous researches.
Many previous researches showed that this protease had potential application as a detergent additive.
Many previous researches proposed lists of DEGs, pathways, network modules (the latter two can be considered as gene sets) to predict prognosis for HCC patients.
