The reliability factors of a dragline stripping system were analyzed using system reliability theory to improve its reliability and ensure the stability of surface coal mine production.The relationship between the dra...The reliability factors of a dragline stripping system were analyzed using system reliability theory to improve its reliability and ensure the stability of surface coal mine production.The relationship between the dragline scheduled stripping volume with both the weighted average thickness of the coal seam and the height of the blast casting bench was derived.The results show that the reliability of the dragline stripping system decreases with the weighted average thickness of the coal seam and increases with a reduced casting blast bench height and monthly raw coal production capacity.Furthermore,the dynamic monthly advance distance of the dragline stripping system was found,a new concept of the dragline stripping system reliability and measurement methodology were proposed,and a prediction model for the dragline production capacity was established using a generalized regression neural network.In addition,the steps and processes of the reliability were improved.The study on the Heidaigou surface mine shows that the height of the casting blast bench should be reduced to 10.5 m when its raw coal production capacity is improved from 20 to 30 Mt/a.During the normal production of surface coal,the system reliability can be improved by dynamically determining the weighted average coal seam thickness,accurately predicting the dragline production capacity,and taking other corresponding measures.展开更多
With the continuous development of the construction industry, post cast strip construction technology has been widely used in large-scale engineering construction site. At present, most of the buildings are using conc...With the continuous development of the construction industry, post cast strip construction technology has been widely used in large-scale engineering construction site. At present, most of the buildings are using concrete structure, which will produce certain deformation, cracks and foundation settlement under the influence of various external factors, which causing certain harm to the overall construction quality. The application of post cast strip construction technology in construction engineering can reasonably solve the above problems, improve the construction quality, and play a key role in the stable development of the construction industry.展开更多
With the comprehensive promotion of China's urbanization process, the speed of urban construction is accelerated. In order to improve the construction quality faster and more effectively and ensure the constructio...With the comprehensive promotion of China's urbanization process, the speed of urban construction is accelerated. In order to improve the construction quality faster and more effectively and ensure the construction safety, the construction technology is also developing in the direction of modernization. Through innovation and good application of science and technology, the quality and safety of buildings can be effectively guaranteed. Architecture involves many disciplines, among which the post casting zone construction technology is the most important one and plays an important role in architecture. Post broadcast tape technology can effectively improve the quality of housing construction.展开更多
Pathogenic microorganisms can cause infectious diseases in the human body and cause harm to humans.Under the continuous changes of human life style,sudden infectious diseases and sudden pathogenic microbial contaminat...Pathogenic microorganisms can cause infectious diseases in the human body and cause harm to humans.Under the continuous changes of human life style,sudden infectious diseases and sudden pathogenic microbial contamination in food have brought great challenges to human health.Traditional pathogenic microorganism detection is mainly carried out in laboratories with low speed,and requires experienced operators,which greatly affects the detection efficiency,and real-time monitoring cannot be achieved in the face of epidemics or food contamination.In response to these new situations,new on-site rapid detection methods have become a must,but to achieve the purpose of on-site rapid and immediate detection,higher requirements have been put forward to sensitivity and specificity.Due to their special photoelectric properties and adsorption properties,nanomaterials have gradually been applied in on-site rapid detection methods such as biosensors,and some substantial progress has been made.In this study,we introduced the actual application of nanomaterials in testing and their applications in on-site rapid testing,and made some prospects for the development of on-site rapid testing methods.展开更多
基金This work was supported by the Scientific Research Program Funded by Shaanxi Provincial Education Department(Program No.18JS067)the National Natural Science Foundation of China(Program No.51974231).
文摘The reliability factors of a dragline stripping system were analyzed using system reliability theory to improve its reliability and ensure the stability of surface coal mine production.The relationship between the dragline scheduled stripping volume with both the weighted average thickness of the coal seam and the height of the blast casting bench was derived.The results show that the reliability of the dragline stripping system decreases with the weighted average thickness of the coal seam and increases with a reduced casting blast bench height and monthly raw coal production capacity.Furthermore,the dynamic monthly advance distance of the dragline stripping system was found,a new concept of the dragline stripping system reliability and measurement methodology were proposed,and a prediction model for the dragline production capacity was established using a generalized regression neural network.In addition,the steps and processes of the reliability were improved.The study on the Heidaigou surface mine shows that the height of the casting blast bench should be reduced to 10.5 m when its raw coal production capacity is improved from 20 to 30 Mt/a.During the normal production of surface coal,the system reliability can be improved by dynamically determining the weighted average coal seam thickness,accurately predicting the dragline production capacity,and taking other corresponding measures.
文摘With the continuous development of the construction industry, post cast strip construction technology has been widely used in large-scale engineering construction site. At present, most of the buildings are using concrete structure, which will produce certain deformation, cracks and foundation settlement under the influence of various external factors, which causing certain harm to the overall construction quality. The application of post cast strip construction technology in construction engineering can reasonably solve the above problems, improve the construction quality, and play a key role in the stable development of the construction industry.
文摘With the comprehensive promotion of China's urbanization process, the speed of urban construction is accelerated. In order to improve the construction quality faster and more effectively and ensure the construction safety, the construction technology is also developing in the direction of modernization. Through innovation and good application of science and technology, the quality and safety of buildings can be effectively guaranteed. Architecture involves many disciplines, among which the post casting zone construction technology is the most important one and plays an important role in architecture. Post broadcast tape technology can effectively improve the quality of housing construction.
文摘Pathogenic microorganisms can cause infectious diseases in the human body and cause harm to humans.Under the continuous changes of human life style,sudden infectious diseases and sudden pathogenic microbial contamination in food have brought great challenges to human health.Traditional pathogenic microorganism detection is mainly carried out in laboratories with low speed,and requires experienced operators,which greatly affects the detection efficiency,and real-time monitoring cannot be achieved in the face of epidemics or food contamination.In response to these new situations,new on-site rapid detection methods have become a must,but to achieve the purpose of on-site rapid and immediate detection,higher requirements have been put forward to sensitivity and specificity.Due to their special photoelectric properties and adsorption properties,nanomaterials have gradually been applied in on-site rapid detection methods such as biosensors,and some substantial progress has been made.In this study,we introduced the actual application of nanomaterials in testing and their applications in on-site rapid testing,and made some prospects for the development of on-site rapid testing methods.
