Reliability Study for Communication System: A Case Study of an Underground Mine
Round 1
Reviewer 1 Report
Dear Editor
In this paper, authors develop new model and suggested for developing the rate probability of the availability of underground mine communication system with one, two and three shafts. According to the original objectives of our study, a methodology has been developed that allows for simulation development of the without standby communication system in one shaft underground mine, which shows the impact of doubling the current and corrective maintenance without standby after increasing preventative maintenance by 50% and increasing corrective and preventative maintenance simultaneously. The results of this study show that using system dynamics modeling instead of traditional methods provides a simple simulation model that can be used to study the reliability and availability of any communication system. In this paper, real-time failure data of a system was used for simulation development. System failure data was not used to develop a model for single and dual standby systems. By being based on a real operating system, the models that were developed are suitable for practical use. In the future, these models can be developed for any system by using more complex system dynamics and real-time failure data for single and dual standby system model.
Paper is well written, and I have following observations:
1) Abstract is too long, must be short and specific to the topic.
2) Details must be added in the introduction part.
3) typo mistakes must be incorporated such as Drift (inclined)or, etc
4) in equations 1 and 2 * must be removed
5) In my finding, the system they developed is just linear differential equations with constant co-officiants, and this kind of system (like eq 8-15) has a unique solution of the system and can be solved exactly if it is so then why do we go for an approximation? What was the need for an approximation when we have an exact solution?
Authors must cite https://doi.org/10.1186/s13662-021-03519-1, https://doi.org/10.1515/mgmc-2021-0012, file:///C:/Users/6702/Downloads/preprints202106.0073.v1.pdf,https://www.researchgate.net/publication/343933961_A_study_of_Mining_Communication_System_Reliability_Model
Author Response
Response to Reviewer 1 Comments
Point 1: Abstract is too long, must be short and specific to the topic.
Response 1: The abstract is redused and now it is covered purpose, method, results and originality/novety.
Point 2: Details must be added in the introduction part.
Response 2: This study is the main part of my research work for doctoral degree, and in the introduction section have been added other works and studies that are close related to the topic of the study.The main detailed parts of the paper are included in the materials and methods section. Detailed parts were added to the Introduction section.
Point 3: Typo mistakes must be incorporated such as Drift (inclined)or, etc.
Response#3: These mistakes are have been corrected.
Point 4: In equations 1 and 2 * must be removed.
Response#4: In equations 1 and 2 * was removed.
Point 5: In my finding, the system they developed is just linear differential equations with constant co-officiants, and this kind of system (like eq 8-15) has a unique solution of the system and can be solved exactly if it is so then why do we go for an approximation? What was the need for an approximation when we have an exact solution?
Response#5: The system dynamics method was used as the model was developed with the possibility of experiment and simulation. For example, simulations can be performed to improve the quality of preventive and corrective maintenance. If it is calculated analytically, it is difficult to perform experiments and simulation in a simple way.
Author Response File: 
Author Response.docx
Reviewer 2 Report
The following points should be considered to improve the presentation of this paper:
(1) What is the relationship between the system on electric and other system that are close to communication system?
(2)The abstract and the conclusion are too long.
(3）The numerical simulations may not be convincing. Can you compare the results with the other results to show the progress of your results? The author should strengthen the comparison of the discussed problems in simulation by figures and tables.
（4 ）The presentation can be further polished Also, the format of the references should be unified.
(5) Can you apply neural networks to your study?Some future research topics can be discussed in the conclusion, for example, Extended Analysis on the global Mittag-Leffler synchronization problem for fractional-order octonion-valued BAM neural networks; Unified analysis on the global dissipativity and stability of fractional-order multidimension-valued memristive neural networks with time delay.
Author Response
Response to Reviewer 2 Comments
Point 1: What is the relationship between the system on electric and other system that are close to communication system?
Response 1: We wrote the first sentence of the abstract section that way because the power system is very similar to the underground mine communication system. But because your question was a very valid criticism, we changed the first sentence of the abstract. As for other systems, we took more ideas from the works [5], [6] about the resource system and the maintenance, then our study expanded more and compared the results in our paper.
Point 2: The abstract and the conclusion are too long.
Response 2: The abstract has been suggestively reduced. However, it is a bit difficult to reduce the conclusion part, because according to the results of our study and also comments from other reviewers, there was a need to add more information about the future work related to our study.
Point 3: The numerical simulations may not be convincing. Can you compare the results with the other results to show the progress of your results? The author should strengthen the comparison of the discussed problems in simulation by figures and tables.
Response#3: We cited from the research work on reliability centered maintenance [5] and used in our study. Also, we compared the results of our own work with the results of that work. As well, on Implications and limitations of the study section of the paper, the problems occurred in our study before using the system dynamics simulation method.
Point 4: The presentation can be further polished Also, the format of the references should be unified.
Response#4: The format of the reference section is consolidated. Also, the results expressed in some graphs were removed, leaving a graph showing all the results on one graph.
Point 5: Can you apply neural networks to your study?Some future research topics can be discussed in the conclusion, for example, Extended Analysis on the global Mittag-Leffler synchronization problem for fractional-order octonion-valued BAM neural networks; Unified analysis on the global dissipativity and stability of fractional-order multidimension-valued memristive neural networks with time delay.
Response#5: This part was updated and was included in the conclusion.
Author Response File: Author Response.docx
Reviewer 3 Report
The article discusses the works related to reliability studies on electric and other system that are close to communication systems.
The idea is good, but the following issues which are needed to be addressed before publication:
1. The motivation of the study needs to be discussed more clearly.
2. The title should be changed: i.e., Reliability Study for Communication System: A case study of the Underground coal Mine
3. A schematic diagram is required for research methodology.
4. Research implications and limitations are not discussed. Please specify these in separate sections.
5. A thorough proofreading is required for grammatical errors.
Author Response
Response to Reviewer 3 Comments
Point 1: The motivation of the study needs to be discussed more clearly?
Response 1: This study is a major part of my research for doctoral degree that is on the reliability research of underground mine communication system, and we have previously published other research papers related to the topic. Based on the results of the previous work, the direction of this work was revealed
and then the purpose of this paper was determined. Since the underground mine has its own features compared to the surface, ensuring the reliable operation of the underground mine communication system became one of the motivations of this study. In addition, for me, the fact that I myself work as a communications engineer in the Oyu Tolgoi mine had a great influence on choosing this topic.
Point 2: The title should be changed: i.e., Reliability Study for Communication System: A case study of the Underground coal Mine.
Response 2: According to your suggestion, the title of the paper has been changed to Reliability Study for Communication System: A Case Study of the Underground Copper Mine. Because we carried out the research on the example of the communication system of Oyu Tolgoi copper mine.
Point 3: A schematic diagram is required for research methodology.
Response#3: In the Materials and methods section, a diagram and explanatory table about the research methodology have been added.
Point 4: Research implications and limitations are not discussed. Please specify these in separate sections.
Response#4: As you suggested, we included the implications and limitations of our study in a separate section.
Point 5: A thorough proofreading is required for grammatical errors.
Response#5: The paper was revised by a native English speaker.
Author Response File: Author Response.docx
Round 2
Reviewer 2 Report
The references are not enough.please cite and discuss the following research and yours:
Unified Analysis on the Global Dissipativity and Stability of Fractional-Order Multidimension-valued Memristive Neural Networks With Time Delay, IEEE Transactions on Neural Networks and Learning Systems,33(7),5656-5665,2022.
Extended Analysis on the global Mittag-Leffler synchronization problem for fractional-order octonion-valued BAM neural networks,154(2022),491-507.
Reviewer 3 Report
My comments are significantly addressed.
