Mine Fire Safety Monitoring in Underground Metal Mines: Is Zigbee Wireless Sensor Networks Technology the Best Choice?

2020 ◽  
Vol 18 (12) ◽  
pp. 910-912
Author(s):  
Haoxuan Yu
Keyword(s):  
Economic Losses ◽  
Dust Explosion ◽  
Mining Engineering ◽  
Monitoring Methods ◽  
Present Stage ◽  
Fire Monitoring ◽  
Mine Fire ◽  
Metal Mines ◽  
Practical Engineering ◽  
Engineering Projects

Mine fire is a very common and serious problem in mining engineering, and often causes casualties, equipment losses, mine shutdown, resource destruction, and even sulphide dust explosion. So it is of vital importance to monitor mine fire in the engineering projects in order to prevent economic losses and casualties. Actually, we have done a lot of engineering projects on mine fire monitoring and have seen a variety of monitoring systems in underground metal mines. Unmodestly speaking, we are experts in this field, therefore, in this viewpoint paper, we mainly introduce a few mine fire monitoring methods and technologies according to our practical engineering experience, especially the ZigBee WSN technology and sensors. And in the end of the paper, we have explained “Why is ZigBee WSN technology the best choice in the fire monitoring in the underground metal mines at the present stage?”.

Pretreatment of Micro-Polluted Raw Water by Parallel Process of Photocatalysis-Biological Contact Oxidation

2011 ◽  
Vol 374-377 ◽  
pp. 851-854
Author(s):  
Ying Qing Guo ◽  
Chun Sheng Lei ◽  
Er Deng Du
Keyword(s):  
Removal Efficiency ◽  
Ph Value ◽  
Reference Value ◽  
Parallel Process ◽  
Biological Oxidation ◽  
Raw Water ◽  
Practical Engineering ◽  
Contact Oxidation ◽  
Biological Contact Oxidation ◽  
Engineering Projects

By using parallel process of photocatalysis-biological contact oxidation, a research on the pretreatment effect of micro-polluted raw water was conducted. The result indicates that the changes of HRT and the initial concentration take significant impact on the removal of NH3-N. 60min is the best residence time for the pretreatment. Once the thickness of composite media is 120mm, the removal efficiency of CODMn may reach as much as 15.55%, while the average removal efficiency of turbidity is 20%. Since the nitration reaction consumes certain amount of alkalinity, the pH value of outlet water is lower than inlet water. When employing parallel process, biological oxidation and photocatalysis are performed and finished in the same reactor simultaneously, conducing to maintaining a moderate level of the removal of CODMn and NH3-N. All these are of reference value for its application in practical engineering projects.

Appropriate Methods for Tropical Coastal Resource Inventory and Monitoring

1984 ◽  
Vol 16 (3-4) ◽  
pp. 541-550
Author(s):  
R M Watson
Keyword(s):  
Economic Status ◽  
Coastal Engineering ◽  
Matrix Analysis ◽  
Eastern Africa ◽  
Monitoring Methods ◽  
Aerial Surveillance ◽  
Tropical Regions ◽  
Multi Stage ◽  
Inventory And Monitoring ◽  
Engineering Projects

Most investments in research, development and management for coastal engineering projects have taken place in temperate zones, usually in areas of highly developed infrastructures. There is a need for more coastal engineering in poor tropical regions, and many contend that the economic status of this part of the world is a consequence of poorly developed infrastructures. The provision of appropriate information on resources and ecology in the tropics, against which coastal engineering projects can be evaluated, requires special techniques for inventory and monitoring. Methods are influenced by the particular biologies of tropical coastal ecosystems, and by the undeveloped state of economies and infrastructures. A selection of methods found suitable for tropical coastal studies in Eastern Africa is described, including remote sensing, multi-stage sampling, non-biased quantification techniques, fixed point monitoring, low-level aerial surveillance and reconnaissance, an aerial collecting drogue, and a matrix analysis for evaluating environmental consequences in valid economic terms.

Learning Physics Using Practical Engineering Projects

2010 ◽  
Vol 156-157 ◽  
pp. 1082-1085
Author(s):  
Hui Liang Zhang ◽  
Ding Ding Shi ◽  
Chun Yuan Zhang
Keyword(s):  
Problem Solving ◽  
Communication Skills ◽  
Self Directed Learning ◽  
Learning Skills ◽  
Problem Solving Skills ◽  
Practical Engineering ◽  
Directed Learning ◽  
Problem Solving Strategy ◽  
Solving Strategy ◽  
Engineering Projects

A problem solving strategy based on practical engineering projects in physics has been developed. The survey shows that 85% of the students think this strategy can help them improve self-directed learning skills, their communication skills and problem solving skills in their learning process.

scholarly journals Application of WSN Fire Monitoring System in Coal Mining

2017 ◽  
Vol 13 (03) ◽  
pp. 17
Author(s):  
Chengyu Bai
Keyword(s):  
Monitoring System ◽  
Coal Mine ◽  
Control Measures ◽  
Sensor Nodes ◽  
Basic Unit ◽  
Control Center ◽  
Fire Monitoring ◽  
Mine Fire ◽  
Sensor Module ◽  
Coal Mine Fire

<span style="font-family: 'Times New Roman',serif; font-size: 10pt; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: DE; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;">Targeted at the potential fire in coal mine production, this paper proposes a coal mine fire monitoring system based on Zig-bee technology, and discusses the network data transmission process in the system. When the system is applied to an actual coal mine, it achieves a sound fire monitoring effect. The wireless sensor network (WSN) coal mine fire monitoring system consists of such three subsystems as data acquisition subsystem, control center subsystem and emergency response subsystem. With sensor nodes as the basic unit, the WSN is divided into five parts: sensor module, treatment module, wireless communication module, location module and power supply module. The system can monitor the air temperature, humidity and smoke concentration of fire in the coal mine, and provide effective basis for monitoring department to make decisions on fire prevention and control measures. The on-site monitoring test shows that, in the event of a fire, the WSN can monitor the trend of fire in the coal mine effectively, reflect the temperature distribution in details, and issue alarms accurately. The conclusion offers a theoretical reference for the development of coal mine fire monitoring technology.</span>

Forest fire monitoring using NOAA satellite AVHRR

1986 ◽  
Vol 16 (5) ◽  
pp. 975-982 ◽  
Author(s):  
M. D. Flannigan ◽  
T. H. Vonder Haar
Keyword(s):  
Forest Fires ◽  
Forest Service ◽  
Fire Size ◽  
Monitoring Methods ◽  
North Central ◽  
Fire Monitoring ◽  
Forested Areas ◽  
Remaining Time ◽  
Very High ◽  
Fire Outbreak

The feasibility of using the advanced very high resolution radiometer (AVHRR) carried by the National Oceanic and Atmospheric Administration (NOAA) series of satellites to monitor forest fires was tested during a severe fire outbreak in north central Alberta between June 12 and June 21, 1982. A multispectral technique used AVHRR channels 3 and 4 to identify fires and estimate fire size. This multispectral approach enabled identification of subpixel-sized fires as small as 1 ha. During the study, fires were obscured from satellite view by the presence of cloud and smoke 59% of the time. In the remaining time, 80% of the fires listed by the Alberta Forest Service were identified by satellite. Satellite observations of forest fires are not sufficiently accurate to replace existing monitoring methods, but they are of value in providing a rapid, inexpensive supplement, especially in remote forested areas.

The Transformation Method between Simple Matrix of Jordan and its Algebra Equivalence System

2012 ◽  
Vol 616-618 ◽  
pp. 2117-2126
Author(s):  
Zhong Xu Han ◽  
Ya Hong Chen
Keyword(s):  
Control System ◽  
Simple Calculation ◽  
Transformation Method ◽  
Standard Type ◽  
Matrix Block ◽  
Rapid Calculation ◽  
Practical Engineering ◽  
Simple Matrix ◽  
Engineering Projects ◽  
Application Scope

Algebra Equivalent Observer (AEO) is a derivate due to the nonsingularity of state in linear system, and also an observer usually applied in practical engineering projects. For the rapid calculation of what the parameters of AEO having effect on control system. Taking great inertia system as object to analyze relationship between a simple matrix J of Jordan standard type and its algebra equivalent system called as matrix block JBS of Jordan standard type in broad sense. A simple calculation method of the transform matrix P is given, in which P is used in JBS=PJP–1. Some simple methods of design and debug to control system can be got during expanding the application scope of the method in process of parameters setting of the observer.

scholarly journals Intelligent Ventilation Systems in Mining Engineering: Is ZigBee WSN Technology the Best Choice?

2021 ◽  
Vol 4 (3) ◽  
pp. 42
Author(s):  
Mario Di Nardo ◽  
Haoxuan Yu
Keyword(s):  
Ventilation System ◽  
Mining Industry ◽  
Mine Ventilation ◽  
Underground Mines ◽  
Mining Engineering ◽  
Great Role ◽  
Present Stage ◽  
Paper Briefly ◽  
Ancient Times ◽  
Ventilation Systems

With the continuous development and progress of the mining industry, various technologies in mining engineering have gradually developed towards the intelligent stage, and the ventilation system is no exception. Since ancient times, mine ventilation has been a necessary part of mining engineering, and so the optimization of mine ventilation undoubtedly plays a great role in mining production. This two-part opinion paper briefly introduces the development of the intelligent ventilation in mining engineering and serves as a guide to the Tossing out a brick to get a jade gem, with implications for both the development and the future of the underground mine ventilation systems. Finally, in the second part of the paper, we explain why we think ZigBee WSN technology is the best choice in intelligent ventilation systems in underground mines at the present stage.

scholarly journals Scour Protection of Underwater Pipelines

2018 ◽  
Vol 7 (4) ◽  
pp. 171
Author(s):  
Liquan Xie ◽  
Yehui Zhu
Keyword(s):  
Literature Review ◽  
Numerical Simulations ◽  
Local Scour ◽  
The Self ◽  
Research Progress ◽  
Submarine Pipeline ◽  
Practical Engineering ◽  
Scour Protection ◽  
Engineering Projects

 A detailed literature review on the protection of local scour beneath a submarine pipeline is presented. The review covers two basic parts of countermeasures against the pipeline scour, namely preventing the onset of scour and stimulating the self-burial of a pipeline. The research progress on the methods of the two sections is discussed in detail separately. The methods preventing the onset of scour have been extensively studied, but the understanding on their mechanisms is yet to be improved. The progress in stimulating the self-burial of a pipeline mainly focuses on a spoiler attached to a pipeline, which is investigated comprehensively with both experiments and numerical simulations. Both parts of countermeasures have been applied in some practical engineering projects and the protection effects are generally satisfying.

scholarly journals Semantic-Segmentation-Based Rail Fastener State Recognition Algorithm

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Liming Li ◽  
Rui Sun ◽  
Shuguang Zhao ◽  
Xiaodong Chai ◽  
Shubin Zheng ◽  
...  
Keyword(s):  
Semantic Segmentation ◽  
Recognition Algorithm ◽  
Detection Methods ◽  
State Recognition ◽  
Detection Model ◽  
Practical Engineering ◽  
The One ◽  
And Function ◽  
Key Steps ◽  
Engineering Projects

Rail fastener status recognition and detection are key steps in the inspection of the rail area status and function of real engineering projects. With the development of and widespread interest in image processing techniques and deep learning theory, detection methods that combine the two have yielded promising results in practical detection applications. In this paper, a semantic-segmentation-based algorithm for the state recognition of rail fasteners is proposed. On the one hand, we propose a functional area location and annotation method based on a salient detection model and construct a novel slab-fastclip-type rail fastener dataset. On the other hand, we propose a semantic-segmentation-framework-based model for rail fastener detection, where we detect and classify rail fastener states by combining the pyramid scene analysis network (PSPNet) and vector geometry measurements. Experimental results prove the validity and superiority of the proposed method, which can be introduced into practical engineering projects.

scholarly journals Relevance of the problem and the current situation with infectious morbidity in the Russian ­Federation

2021 ◽  
Vol 102 (1) ◽  
pp. 85-91
Author(s):  
I E Kravchenko ◽  
A M Galieva ◽  
A Yu Vafin
Keyword(s):  
Infectious Diseases ◽  
Russian Federation ◽  
New Technologies ◽  
Morbidity And Mortality ◽  
Economic Losses ◽  
High Morbidity ◽  
Urgent Problem ◽  
Present Stage ◽  
Infectious Morbidity ◽  
The Russian Federation

The article provides an overview of domestic and foreign literary sources devoted to an urgent challenge in modern health care infectious morbidity. The extraordinary socio-economic importance of infectious diseases at the present stage throughout the world, including in the Russian Federation, based on their global spread and high economic losses associated with disability, treatment costs and anti-epidemic measures. In recent decades, the emergence of previously unknown new infectious diseases and the return of old infections, many of which pose a high epidemiological danger and are characterized by high mortality, have been noted. Among the significant reasons for the emergence of new infections, an increase in infectious diseases, changes in the nature of the course of known diseases, it is necessary to note such reasons as a change in a person's lifestyle and the introduction of new technologies. In Russia, a high incidence of acute respiratory infections is recorded annually. An increase in the incidence of acute intestinal infections of viral etiology and a decrease in the incidence of these diseases of bacterial etiology are noted. An urgent problem is the high level of morbidity and mortality from infection caused by the human immunodeficiency virus, as well as the incidence of chronic viral hepatitis and an increase in mortality from their unfavorable outcomes. Natural focal infections remain an important problem, among which hemorrhagic fever with renal syndrome and tick-borne infections occupy a significant place. The threat of the invasion of infections that cause emergencies in the field of sanitary and epidemiological welfare of the population into the Russian Federation territory remains. Infectious diseases are becoming one of the leading causes of premature mortality in the working-age population. In 2020, the Russian Federation faced the pandemic of the new coronavirus infection COVID-19, which led to high morbidity and mortality. Thus, infectious diseases are an urgent problem for the Russian Federation at the present stage, necessitates the development of a targeted program to reduce morbidity and mortality from infectious diseases.

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