Prompt gamma neutron activation analysis (PGNAA) is a non-destructive online measurement nuclear analysis method. With its unique advantages, it has been widely used in online analysis of industrial materials such as ...Prompt gamma neutron activation analysis (PGNAA) is a non-destructive online measurement nuclear analysis method. With its unique advantages, it has been widely used in online analysis of industrial materials such as coal, cement, and minerals in recent years. </span><span style="font-family:Verdana;">However, there are many kinds of literature on PGNAA in the field of industrial materials detection, and there are still a few concluding articles. To this end,</span><span style="font-family:Verdana;"> based on the principle of PGNAA online analysis, the status quo and development of the real-time online detection of industrial material components in the field are reviewed and discussed by consulting a large number of domestic and foreign PGNAA related literature and data, to facilitate the reference of relevant scientific researchers.展开更多
1.INTRODUCTION Fire is one of the most common and severe disasters that threaten public safety,social development,and forest-grassland ecosystems.1,2 It not only causes significant casualties and property losses but a...1.INTRODUCTION Fire is one of the most common and severe disasters that threaten public safety,social development,and forest-grassland ecosystems.1,2 It not only causes significant casualties and property losses but also often triggers secondary disasters,resulting in profound social and ecological impacts.Broadly speaking,fire-safety materials are those designed to prevent,mitigate,or inhibit fire initiation and propagation.This category includes but is not limited to flame-retardant materials,fire detection materials,and fire suppression materials,among which the flame-retardant materials which serve as one of the most effective measures for fire prevention and hazard minimization.Numerous laws and regulations have been enacted worldwide to mandate flame retardancy in materials across various industries.These requirements encompass foundational materials such as chemicals,plastics,rubbers,fibers,textiles,coatings,and composites as well as critical application sectors including aerospace,energy equip-ment,rail transportation,large aircraft,new energy vehicles,emergency safety,construction materials,military equipment,and wildfire prevention.展开更多
Fuzzy logic detection has been applied to the signal enhancement of ultrasonic flaw echoes from the structure noise due to nonflaw related scattering of ultrasound in highly scattering materials. Cross-correlation, ph...Fuzzy logic detection has been applied to the signal enhancement of ultrasonic flaw echoes from the structure noise due to nonflaw related scattering of ultrasound in highly scattering materials. Cross-correlation, phase difference and fractal dimension are used as signal characteristics in fuzzy logic detection. Experimental results show that this new method has better performance than the commonly used correlation detection.展开更多
文摘Prompt gamma neutron activation analysis (PGNAA) is a non-destructive online measurement nuclear analysis method. With its unique advantages, it has been widely used in online analysis of industrial materials such as coal, cement, and minerals in recent years. </span><span style="font-family:Verdana;">However, there are many kinds of literature on PGNAA in the field of industrial materials detection, and there are still a few concluding articles. To this end,</span><span style="font-family:Verdana;"> based on the principle of PGNAA online analysis, the status quo and development of the real-time online detection of industrial material components in the field are reviewed and discussed by consulting a large number of domestic and foreign PGNAA related literature and data, to facilitate the reference of relevant scientific researchers.
基金supported by the National Science Foundation of China(U24A6004)the Fundamental Research Funds for the Central Universities,the 111 project(B20001)+1 种基金National Key Laboratory of Advanced Polymer Materials(Grant No.sklpme2024-2-02)the Institutional Research Fund from Sichuan University(2021SCUNL201).
文摘1.INTRODUCTION Fire is one of the most common and severe disasters that threaten public safety,social development,and forest-grassland ecosystems.1,2 It not only causes significant casualties and property losses but also often triggers secondary disasters,resulting in profound social and ecological impacts.Broadly speaking,fire-safety materials are those designed to prevent,mitigate,or inhibit fire initiation and propagation.This category includes but is not limited to flame-retardant materials,fire detection materials,and fire suppression materials,among which the flame-retardant materials which serve as one of the most effective measures for fire prevention and hazard minimization.Numerous laws and regulations have been enacted worldwide to mandate flame retardancy in materials across various industries.These requirements encompass foundational materials such as chemicals,plastics,rubbers,fibers,textiles,coatings,and composites as well as critical application sectors including aerospace,energy equip-ment,rail transportation,large aircraft,new energy vehicles,emergency safety,construction materials,military equipment,and wildfire prevention.
文摘Fuzzy logic detection has been applied to the signal enhancement of ultrasonic flaw echoes from the structure noise due to nonflaw related scattering of ultrasound in highly scattering materials. Cross-correlation, phase difference and fractal dimension are used as signal characteristics in fuzzy logic detection. Experimental results show that this new method has better performance than the commonly used correlation detection.
