<p>This paper has already received comments from the reviewers. One reviewer suggests improving the English writing of the paper as: "Overall, the level of English writing in the paper needs serious improvement. Please check the grammar throughout the paper. But more importantly,  improve paragraph writing and sentence structuring. Currently, the manuscript is hard to read, also because of the use of acronyms throughout the text (so avoid unnecessary acronyms). Check consistency of tenses".<br /> <br /> I have already revised the paper according to the reviewers' comments and tried to improve the English writing. Please refer to the comments above and help to improve the English language of the paper.</p>