Based on coal seam geological condition and mining technological characteristic in Jisan Mine, coal seamgeological condition is quantitative evaluated by using fuzzy evaluation with the view of coal mining and coalfac...Based on coal seam geological condition and mining technological characteristic in Jisan Mine, coal seamgeological condition is quantitative evaluated by using fuzzy evaluation with the view of coal mining and coalfaceproduction. The structure and index system of evaluation factor, the membership functions and weights of evaluationfactor, evaluation model and reliability in the coal seam geological conditions are expounded in detail. Eighty-twocoalfaces which will be exploited is classified. All of these have provided a theoretical foundation for the selection ofcoal mining technology and for sustainable development of the coal mine.展开更多
The dead load crown of hydraulic elastic bulging roll was discussed using the theory of elastically supported beam,and the dead load experiment was carried out. The theoretical calculation is consistent with the exper...The dead load crown of hydraulic elastic bulging roll was discussed using the theory of elastically supported beam,and the dead load experiment was carried out. The theoretical calculation is consistent with the experimental result. The structure parameters for the thickness of roll sleeve,the length of the oil groove and the crown of roll were discussed. The fundamental principle of determining the parameters was put forward. The theoretical basis of the application of the hydraulic elastic bulging roll was established.展开更多
In a small electron storage ring,such as the Hefei Light Source(HLS)ring,the newly generated ions,which can not escape from the beam potential and then are trapped from turn to turn,will lead to the beam instability.T...In a small electron storage ring,such as the Hefei Light Source(HLS)ring,the newly generated ions,which can not escape from the beam potential and then are trapped from turn to turn,will lead to the beam instability.The ions created by the leading bunches can perturb the trailing bunches and also themselves during their subsequent passage,which will make the amplitude of beam oscillation be damped and anti-damped periodically.A computer simulation based on the strong-weak model shows a good agreement with our analytical model using the linear theory.展开更多
文摘Based on coal seam geological condition and mining technological characteristic in Jisan Mine, coal seamgeological condition is quantitative evaluated by using fuzzy evaluation with the view of coal mining and coalfaceproduction. The structure and index system of evaluation factor, the membership functions and weights of evaluationfactor, evaluation model and reliability in the coal seam geological conditions are expounded in detail. Eighty-twocoalfaces which will be exploited is classified. All of these have provided a theoretical foundation for the selection ofcoal mining technology and for sustainable development of the coal mine.
基金Item Sponsored by Scientific and Technological Brainstorm Project for Ninth Five-Year Plan of China(95-528-01-04B)
文摘The dead load crown of hydraulic elastic bulging roll was discussed using the theory of elastically supported beam,and the dead load experiment was carried out. The theoretical calculation is consistent with the experimental result. The structure parameters for the thickness of roll sleeve,the length of the oil groove and the crown of roll were discussed. The fundamental principle of determining the parameters was put forward. The theoretical basis of the application of the hydraulic elastic bulging roll was established.
文摘In a small electron storage ring,such as the Hefei Light Source(HLS)ring,the newly generated ions,which can not escape from the beam potential and then are trapped from turn to turn,will lead to the beam instability.The ions created by the leading bunches can perturb the trailing bunches and also themselves during their subsequent passage,which will make the amplitude of beam oscillation be damped and anti-damped periodically.A computer simulation based on the strong-weak model shows a good agreement with our analytical model using the linear theory.
