Sentence examples for existed some problems in from inspiring English sources

For the initial one (GA-1), despite getting an acceptable result, there still existed some problems in its optimization process.

There existed some problems in chemotherapeutic drugs, such as the development of drug resistance, low bioavailability, and undesirable severe side effects [3, 4].

In practical engineering applications also exist some problems: In Substation Project configuration, many manufacturer device configuration tools, Project configuration file distributed, is Management difficulties.

However, after careful reading of their works, we discovered that there exist some problems in references [1] and [2] as follows.

However, there exists some problem in their proofs.

Although our work gets outstanding performances, there still exists some problems for further investigation in future work.

On the other side, there also exist some problems and challenges waiting for studying in future: PUs' movements are continuous and random, ordinary "ON-OFF" type definition on spectrum channels occupation is not very appropriate for this question actually, a more precise PUs' interference estimation method should be studied.

The new technologies are being investigated that provide high speed, capacity, spectral efficiency, energy efficiency, pseudo outdoor communication, etc. that solves the existed problems in mobile communication system.

However, there exist potential problems in reusing services.

There exist problems in applications whose models can be written in the form [9]. (1.4).

Lots of tools exist to find problems in code that was developed without cybersecurity in mind.