An alpha-uniformized Markov chain is defined by the concept of equivalent infinitesimalgenerator for a semi-Markov decision process (SMDP) with both average- and discounted-criteria.According to the relations of their...An alpha-uniformized Markov chain is defined by the concept of equivalent infinitesimalgenerator for a semi-Markov decision process (SMDP) with both average- and discounted-criteria.According to the relations of their performance measures and performance potentials, the optimiza-tion of an SMDP can be realized by simulating the chain. For the critic model of neuro-dynamicprogramming (NDP), a neuro-policy iteration (NPI) algorithm is presented, and the performanceerror bound is shown as there are approximate error and improvement error in each iteration step.The obtained results may be extended to Markov systems, and have much applicability. Finally, anumerical example is provided.展开更多
为研究青岗坪煤矿综放面矿压规律及支架适应性,指导该矿综放面安全高效生产及后续支架选型,根据青岗坪煤矿42104综放面地质及开采技术条件,通过相似模拟实验及现场观测,分析了综放面覆岩垮落规律、来压强度及支架工作情况。研究结果表明...为研究青岗坪煤矿综放面矿压规律及支架适应性,指导该矿综放面安全高效生产及后续支架选型,根据青岗坪煤矿42104综放面地质及开采技术条件,通过相似模拟实验及现场观测,分析了综放面覆岩垮落规律、来压强度及支架工作情况。研究结果表明:基本顶初次来压步距62m,周期来压步距27 m,来压时支架的平均载荷6 951 k N,最大载荷7 798 k N,动载系数1.36,动载系数随工作面推进呈上升趋势,来压显现强度中等。ZF6800/18/35型支架在42104工作面总体适应性良好,但支架增阻量增加显著,增阻速率大,支架普遍长时间处于增阻状态,支架初撑力整体偏低,应加强工作面初撑力管理;从支架的普遍适应性及安全性考虑,支架工作阻力应提高到8 000 k N为宜。展开更多
文摘An alpha-uniformized Markov chain is defined by the concept of equivalent infinitesimalgenerator for a semi-Markov decision process (SMDP) with both average- and discounted-criteria.According to the relations of their performance measures and performance potentials, the optimiza-tion of an SMDP can be realized by simulating the chain. For the critic model of neuro-dynamicprogramming (NDP), a neuro-policy iteration (NPI) algorithm is presented, and the performanceerror bound is shown as there are approximate error and improvement error in each iteration step.The obtained results may be extended to Markov systems, and have much applicability. Finally, anumerical example is provided.
文摘为研究青岗坪煤矿综放面矿压规律及支架适应性,指导该矿综放面安全高效生产及后续支架选型,根据青岗坪煤矿42104综放面地质及开采技术条件,通过相似模拟实验及现场观测,分析了综放面覆岩垮落规律、来压强度及支架工作情况。研究结果表明:基本顶初次来压步距62m,周期来压步距27 m,来压时支架的平均载荷6 951 k N,最大载荷7 798 k N,动载系数1.36,动载系数随工作面推进呈上升趋势,来压显现强度中等。ZF6800/18/35型支架在42104工作面总体适应性良好,但支架增阻量增加显著,增阻速率大,支架普遍长时间处于增阻状态,支架初撑力整体偏低,应加强工作面初撑力管理;从支架的普遍适应性及安全性考虑,支架工作阻力应提高到8 000 k N为宜。
