The Experts below are selected from a list of 15753 Experts worldwide ranked by ideXlab platform
Shipeng Xue - One of the best experts on this subject based on the ideXlab platform.
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Rock burst prevention based on Dissipative Structure theory
International Journal of Mining Science and Technology, 2012Co-Authors: Dazhao Song, Enyuan Wang, Mingyue Jin, Shipeng XueAbstract:Abstract Dynamic collapses of deeply mined coal rocks are severe. In order to explore new ideas for rock burst prevention, the relationship between entropy equations and Dissipative Structure was studied, and a concept-rock burst activity system (RAS) was proposed and its entropy was analyzed. The energy features of RAS were analyzed, and the relationship between electromagnetic radiation (EMR) intensity E and dissipated energy Ud was initially established. We suggest that rock burst normally happens only when diS ≪ −deS in RAS; RAS is the Dissipative Structure before collapse, and after which it become a new orderly Structure, i.e., a “dead”, a statically orderly Structure. We advanced that the effective way to prevent rock burst is to introduce entropy to the system for it keeps the system away from the Dissipative Structure. E and Ud of RAS are positively related, which is used as a bridge between Dissipative Structure theory and rock burst prevention engineering applications. Based on this, and using the data of rock burst prevention for working face No. 250205up of Yanbei coal mine, an engineering verification for the Dissipative Structure of RAS was carried out, which showed good results.
F Castelli - One of the best experts on this subject based on the ideXlab platform.
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quantum noise reduction in a spatial Dissipative Structure
Physical Review Letters, 1992Co-Authors: Luigi A. Lugiato, F CastelliAbstract:We give the quantum-mechanical formulation of a model which predicts the onset of a spatial Dissipative Structure in a nonlinear optical system. In the case of roll patterns, we show that the two signal beams which constitute the pattern are correlated twin beams, i.e., their intensity difference exhibits fluctuations below the standard quantum limit.
Dazhao Song - One of the best experts on this subject based on the ideXlab platform.
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Evolution Model for Dynamic Pressure-Type Rock Bursts in RADS
Rockburst Evolutionary Process and Energy Dissipation Characteristics, 2020Co-Authors: Dazhao Song, Zhenlei Li, Xueqiu He, Enyuan Wang, Jie LiuAbstract:After roadway excavation, the RADS forms, where complex physical and mechanical changes occur. As the most complex part, RADS is likely to form a Dissipative Structure. According to the previous research, the system is considerably stable at this time, and some small external disturbances are generally absorbed and have little effects on the system’s stability. But when external disturbances are great enough to damage its Dissipative Structure, the system will further self-organize and evolve and likely undergo rock bursts. In this chapter, we analyze the possibility of rock bursts in the RADS from the energy point of view, construct and numerically simulate the model for RADS’s dynamic pressure-type rock burst evolution, and study the characteristic evolution behaviors of the RADS based on the model by using the on-the field EM radiation data.
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Rock burst prevention based on Dissipative Structure theory
International Journal of Mining Science and Technology, 2012Co-Authors: Dazhao Song, Enyuan Wang, Mingyue Jin, Shipeng XueAbstract:Abstract Dynamic collapses of deeply mined coal rocks are severe. In order to explore new ideas for rock burst prevention, the relationship between entropy equations and Dissipative Structure was studied, and a concept-rock burst activity system (RAS) was proposed and its entropy was analyzed. The energy features of RAS were analyzed, and the relationship between electromagnetic radiation (EMR) intensity E and dissipated energy Ud was initially established. We suggest that rock burst normally happens only when diS ≪ −deS in RAS; RAS is the Dissipative Structure before collapse, and after which it become a new orderly Structure, i.e., a “dead”, a statically orderly Structure. We advanced that the effective way to prevent rock burst is to introduce entropy to the system for it keeps the system away from the Dissipative Structure. E and Ud of RAS are positively related, which is used as a bridge between Dissipative Structure theory and rock burst prevention engineering applications. Based on this, and using the data of rock burst prevention for working face No. 250205up of Yanbei coal mine, an engineering verification for the Dissipative Structure of RAS was carried out, which showed good results.
Luigi A. Lugiato - One of the best experts on this subject based on the ideXlab platform.
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quantum noise reduction in a spatial Dissipative Structure
Physical Review Letters, 1992Co-Authors: Luigi A. Lugiato, F CastelliAbstract:We give the quantum-mechanical formulation of a model which predicts the onset of a spatial Dissipative Structure in a nonlinear optical system. In the case of roll patterns, we show that the two signal beams which constitute the pattern are correlated twin beams, i.e., their intensity difference exhibits fluctuations below the standard quantum limit.
Mingyue Jin - One of the best experts on this subject based on the ideXlab platform.
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Rock burst prevention based on Dissipative Structure theory
International Journal of Mining Science and Technology, 2012Co-Authors: Dazhao Song, Enyuan Wang, Mingyue Jin, Shipeng XueAbstract:Abstract Dynamic collapses of deeply mined coal rocks are severe. In order to explore new ideas for rock burst prevention, the relationship between entropy equations and Dissipative Structure was studied, and a concept-rock burst activity system (RAS) was proposed and its entropy was analyzed. The energy features of RAS were analyzed, and the relationship between electromagnetic radiation (EMR) intensity E and dissipated energy Ud was initially established. We suggest that rock burst normally happens only when diS ≪ −deS in RAS; RAS is the Dissipative Structure before collapse, and after which it become a new orderly Structure, i.e., a “dead”, a statically orderly Structure. We advanced that the effective way to prevent rock burst is to introduce entropy to the system for it keeps the system away from the Dissipative Structure. E and Ud of RAS are positively related, which is used as a bridge between Dissipative Structure theory and rock burst prevention engineering applications. Based on this, and using the data of rock burst prevention for working face No. 250205up of Yanbei coal mine, an engineering verification for the Dissipative Structure of RAS was carried out, which showed good results.