Interferometric synthetic aperture radar （InSAR） images reveal deformation around northern Hejin, Shanxi Province. The small baseline subset （SBAS） approach for InSAR-derived deformation indicates that the observe...Interferometric synthetic aperture radar （InSAR） images reveal deformation around northern Hejin, Shanxi Province. The small baseline subset （SBAS） approach for InSAR-derived deformation indicates that the observed deformation pattern can be characterized by the sum of two phenomena： background subsidence from December 2003 to February 2009 with a cumulative displacement of approximately 5 cm and uplift from Febru- ary 2009 to November 2010 with a cumulative displacement of approximately 2.5 cm. Deformation modeling indicates that the local deformation was caused by the closing and opening of a sill beneath northern Hejin. The modeled sill which is approximately 5 km long, 2 km wide, is centered at 1.5 km depth. The deformation was caused by the withdrawal and influx of subsurface water.展开更多
The effects of three factors on combustion performance of petroleum coke, Herin Coal and Shenmu Coal have been studied, including the ratio of primary air, excess air factor, and the swirling intensity of outer second...The effects of three factors on combustion performance of petroleum coke, Herin Coal and Shenmu Coal have been studied, including the ratio of primary air, excess air factor, and the swirling intensity of outer secondary air. The experiments were carried out on a one-dimensional furnace with dual channel swirling burner, in which temperature of center furnace, emission of air pollutants, and burn-out rate of fuel were measured. The results provide the optimal ratio of primary air, excess air factor and swirling intensity of outer secondary air for the fuels. The combustion performance of petroleum coke B is much better than petroleum coke A, but worse than Hejin coal and Shenmu coal. In addition, the burn-out rate of petroleum coke depends much more on the temperature in terminal stage of combustion than in the early stage of combustion.展开更多
基金supported by the Special Earthquake Research Project of the China Earthquake Administration(201208009)
文摘Interferometric synthetic aperture radar （InSAR） images reveal deformation around northern Hejin, Shanxi Province. The small baseline subset （SBAS） approach for InSAR-derived deformation indicates that the observed deformation pattern can be characterized by the sum of two phenomena： background subsidence from December 2003 to February 2009 with a cumulative displacement of approximately 5 cm and uplift from Febru- ary 2009 to November 2010 with a cumulative displacement of approximately 2.5 cm. Deformation modeling indicates that the local deformation was caused by the closing and opening of a sill beneath northern Hejin. The modeled sill which is approximately 5 km long, 2 km wide, is centered at 1.5 km depth. The deformation was caused by the withdrawal and influx of subsurface water.
基金Acknowledgments This work is supported by Natural Science Foundation of China （NO. 51076127） and the Clean Combustion ＆ Gas-solid Two-Phase Flow group in Xi＇an Jiaotong University.
文摘The effects of three factors on combustion performance of petroleum coke, Herin Coal and Shenmu Coal have been studied, including the ratio of primary air, excess air factor, and the swirling intensity of outer secondary air. The experiments were carried out on a one-dimensional furnace with dual channel swirling burner, in which temperature of center furnace, emission of air pollutants, and burn-out rate of fuel were measured. The results provide the optimal ratio of primary air, excess air factor and swirling intensity of outer secondary air for the fuels. The combustion performance of petroleum coke B is much better than petroleum coke A, but worse than Hejin coal and Shenmu coal. In addition, the burn-out rate of petroleum coke depends much more on the temperature in terminal stage of combustion than in the early stage of combustion.
