Requirements for submissions: 

Submission of an article implies that the work described is requested to be original and has not been published previously and copyrighted, that it is not under consideration for publication elsewhere, and its submission has been approved by all the authors and by the institute where the work was carried out, and that, if accepted, it will not be published elsewhere in the same form, in English or in any other language without the written consent of the publisher. Before the files of an article are transmitted, authors should read the explanation with regard to the format of the Journal carefully. Upon acceptance of an article, authors will be asked to sign the Copyright Transfer Agreement. This transfer will ensure the widest possible dissemination of information. 

Manuscript preparing: 

The article should be written in good English. The title should be concise and informative. Author names and affiliations should be presented. E-mail address and complete postal address of corresponding author should be provided. The abstracts should be able to stand alone, stating briefly the purpose of the research, the principal results and major conclusions. The Introduction of the article should state the objectives of the work and provide an adequate background, avoiding a detailed literature survey or a summary of the results. The Experimental section should provide sufficient detail to allow the work to be reproduced (Methods already published should be indicated by a reference). In Results and Discussion section, results should be clear and concise; the discussion should explore the significance of the results of the work, not repeating them. A short Conclusion section should also be presented in the end. Research papers are no less than 6,000 words, and, if accepted, it will not be published elsewhere in the form of Research papers, in English or in any other languages; Reviews are no less than 7,000 words. 

Figures and Tables should be consecutively numbered with Arabic numerals in accordance with their appearance in the text; footnotes indicating them should be placed below the table or figure body. Each figure should have a descriptive legend. Drawings should be of professional quality or generated by high-resolution computer graphics. Nomenclature and units should follow internationally accepted rules and conventions: use the international system of units (SI). If other quantities are mentioned, give their equivalent in SI. References to the literature should be cited in the text by Arabic numerals in square brackets in accordance with their appearance in the text, and listed numerically at the end of the paper. 

Submission: 

All manuscripts should be submitted through the column of “Online Submission” on the website of the journal—http://www.pgtjournal.com. Please prepare a single file (allowed formats: Word) containing all schemes, figures, and tables integrated in the text. Then follow the instructions on the submission website. A successful electronic submission of a manuscript will be followed by a system-generated acknowledgement to the principal/corresponding author of the manuscript. After successful submission, the author can check the whole course through the column of “Online checking” on the website of the journal. The journal adopts the single blind peer review system, we will send the manuscrpt to at least 2 experts for review. Authors must rewrite the portions of the article that do not meet the requirements of the Journal and submit the revision of manuscript via the web site. After the print publication, two journals of each article will be provided free of charge. 

Double blind peer review process 

Each manuscript is subjected to document misconduct detection and preliminary review by the editorial department. In addition, manuscripts are reviewed by two external audit experts from the same profession and the review process for papers is double blind. If both external audit experts agree that the paper is of poor quality, publication is not recommended, and the article is rejected. If both external audit experts agree that the paper is of good quality, the article will be included in the final review. If both external audit experts agree to recommend publication after modifications, the authors will be notified of the required modifications, and the revised draft will be reviewed again before entering the final review. If one of the external audit experts believes the article to be of good quality and recommends publication while the other expert considers the paper to be of poor quality and does not recommend publication, then, a third expert will be invited to review the article, and acceptance, rejection or modification will be decided according to the third expert's opinion. The revised manuscript will be reviewed and approved by the expert before entering the final review.