Fractal characterization for the mining crack evolution process of overlying strata based on microseismic monitoring technology

In order to study the evolution laws during the development process of the coal face overburden rock mining-induced fissure,we studied the process of evolution of overburden rock mining-induced fissures and dynamically quantitatively described its fractal laws,based on the high-precision microseismic monitoring method and the nonlinear Fractal Geometry Theory.The results show that:the overburden rock mining-induced fissure fractal dimension experiences two periodic change processes with the coal face advance,namely a Small→ Big→ Small process,which tends to be stable;the functional relationship between the extraction step distance and the overburden rock mining-induced fissure fractal dimension is a cubic curve.The results suggest that the fractal dimension reflects the evolution characteristics of the overburden rock mining-induced fissure,which can be used as an evaluation index of the stability of the overburden rock strata,and it provides theoretical guidance for stability analysis of the overburden rock strata,goaf roof control and the support movements in the mining face.

A Compliance Society: Social Form and Legal Form of Future

Algorithm-based technologies are promoting the arrival of legal singularity-a time node when the transformation of legal form happens.Frontier researches have demonstrated that artificial intelligence and big data technology will drive the reform of legal system.This article puts forward a new academic model“the compliance society”,which can be defined as a society where all legal subjects abide by the law proactively.The concept is a novel vision of the society of future based on the maximum utilization of modern legal technology.We first explore the feasibility of constructing a compliance society,and then use cost-benefit analysis to assess the possible socio-economic effects.

Japanese Science and Technology Basic Plan: A Perspective of Policy Process

The Japanese government formulates the Science and Technology Basic Plan every five years based on the Science and Technology Basic Law, and indicates the future direction of Japan’s science and technology. This paper describes its history, significance, and decision process of this Science and Technology Basic Plan. Then this paper describes the characteristics of the previous five plans, contributions to Japanese science and technological activities, and its challenges for the future. In the formulation of the Science and Technology Basic Plan, the role of the Council for Science and Technology Policy has been significant. However, after establishing Shinzo Abe administration, the inclination to global innovation has been emphasized in Japan as well, the Council for Science and Technology Policy was renamed the Council for Science, Technology and Innovation, and the midterm and annual strategies centered on innovation have also been prepared. This paper described these movements.Japan suffers from population decline and the increase in governmental deficits, and there is also a tendency towards weakness in science and technology innovation. To formulate more suitable science and technology basic plans will revitalize and strengthen Japan’s science and technology innovation.