Before revision:  With the purpose of solving these issues, many technical solutions have been proposed and evaluated so far , in fields like network architectures, data distribution and filtering, resource balancing, computing models, predictive modeling and synchronization in NVEs.
After revision:  With the purpose of solving these issues, researchers have proposed and evaluated so far , in fields like network architectures, data distribution and filtering, resource balancing, computing models, predictive modeling and synchronization in NVEs.