Abstract.Affected by climate change and other factors, global fires occur frequently, and the fire burning area in the high latitude permafrost region with low temperature is gradually expanding. The occurrence of fire will cause a large amount of carbon to be released into the air, which will further exacerbate global climate change. Through the fourth edition of the Global Fire Emissions Database (GFED), this paper analyzes the burning area and carbon emissions in the permafrost region of southeast Siberia from 1997 to 2020. The results show that the global carbon emissions from fires are mainly … Read more →

Abstract.In order to study the propagation and attenuation law of explosive stress wave in rock mass with filling joints, and consider the influence of different crustal stress conditions, different strength mortar is used to simulate rock mass and joints, and the multi-functional simulation test device of geotechnical engineering is used to carry out explosive model test research, the influence characteristics of different in-situ stress conditions on the attenuation of explosive stress wave in rock mass with different thickness filling joints are analyzed, and obtain the transmission law of stress … Read more →

Abstract.In 2021, the Nobel Prize in Physics was awarded to three physicists who made breakthroughs in understanding complex systems: Syukuro Manabe of Japan, Klaus Hasselmann of Germany and Giorgio Parisi of Italy. This paper mainly introduces the legendary experience of Italian scientist Giorgio parisi, including the promotion of Solvey Conference and his love affair with China. Read more →

Abstract.Split grouting is a common method of stratum reinforcement. However, due to the concealment of grouting itself, it is difficult to observe the slurry diffusion of split grouting. Therefore, this paper uses PFC2D software to simulate the split grouting in loess to study the diffusion law of slurry and the change of formation porosity. The research results show that the number of fracturing cracks increases with the increase of time. The porosity of soil mass changes obviously after the first fracturing, and the change rate of porosity increases after the second fracturing. With the increase of … Read more →

Abstract.Due to the high-speed development of the Internet today, once a burst event occurs, it will attract the general public‘s attention in a short time and spread rapidly on the Internet, which will lead to the formation of large-scale network public opinion on emergencies. We can accurately judge the development trend of bursts and provide a reference for emergency supervisory departments to deal with public opinion crises by predicting the trend of public opinion on the network of emergencies. To address the issues of a single prediction model's low prediction accuracy and the large influence of … Read more →

Abstract.As an important cultural heritage, traditional garden stone rockery has attracted much attention. In recent years, with the frequent climate change and the intensification of the impact of human activities, the health status of traditional garden rockery has been declining. However, the corresponding technical means of health evaluation are still not systematic. Starting from the actual needs of rockery protection, this paper focuses on combing the relevant detection and analysis technologies from the aspects of materials and structural connection, and explores their applicability, in order to … Read more →

Abstract.In this paper, through the methods of Topsis evaluation method, rank and ratio comprehensive evaluation method, and entropy weight method, a relevant model is established to quantitatively evaluate each type of fire detector components, alarm signal authenticity, and the comprehensive management level of fire brigade, and to propose an improvement plan. Read more →

Abstract.Children with mental disabilities are one of the large special groups in China, which has been concerned by all walks of life. This paper combined with literature research and field investigation, found that the current rehabilitation methods of children with mental disorders, but the systematic research is less, and put forward children with mental disorders face "slow mental development, emotional sensitivity, lack of social ability, limited family support", with "accompanying education, professional training, return to normal life" and other requirements. Read more →

Abstract.This paper uses k-means clustering algorithm, single objective optimization model and multisource multi-sink problem shortest path algorithm to obtain the optimal path algorithm for emergency evacuation and the shortest time model.Firstly, a code of conduct for the division of terrorist attacks has been established. The number of casualties in various incidents and the scope of destructive power to public areas are counted. A three-dimensional cluster core is selected. All terrorist at- tacks are classified into three levels: level 1-3 by the k-means clustering algorithm, and the degree of harm … Read more →