This study focused on the stability control of roof in long wall stratified mining of large dip angle thick coal seam.Taking Panbei Coal Mine in Huainan as an example, the effect mechanism of water content, compression ratio and grain size grading on the compression characteristics of gangue is analyzed by comprehensive application of gangue latera
This paper discusses the resilience of the UAV quadrotor to wind disturbances.An unknown input-state observer is presented that uses the Lipschitz method to estimate the internal states and disturbances of the quadrotor and compensate for them by varying the velocities of 8056597586030 the four rotors.The observer intends to use existing sensor mea
This paper examines the long-term urban modification of mean annual conditions of near surface temperature in Nairobi City.Data from four weather stations situated in Nairobi were collected from the Kenya Meteorological Department for the period from 1966 to 1999 inclusive.The data included mean annual maximum and minimum temperatures, and was firs