【摘 要】
:
Coal production capacity regulation is a complex system involving economic growth,structural opti-mization,high-efficiency mining,and environmental protection.Based on its driving factors,this paper forms four regulation modes representing different contr
【机 构】
:
School of Management,China University of Mining and Technology-Beijing,Beijing,100083,China
论文部分内容阅读
Coal production capacity regulation is a complex system involving economic growth,structural opti-mization,high-efficiency mining,and environmental protection.Based on its driving factors,this paper forms four regulation modes representing different control orientations,establishes a system dynamics model,and predicts the regulation effects of single-factor and combined control mode.The result shows:(1)Except for the mechanization degree and recovery rate,the other nine individual production capacity control policies are all conducive to reducing coal production capacity and restraining the excessive growth of coal production capacity.(2)The effect of combined regulation mode on slowing down the growth of coal demand,regulating the excessive growth of coal production capacity and new capacity investment are obviously better than that of single policy.(3)The combined control modes have obvious differences in the suppression effect on coal production capacity:transformational development mode>technology-driven mode>structural optimization mode>efficiency improvement mode.Therefore,in the process of achieving optimal regulation of coal production capacity,attention should be paid to the preferential use of transformational development and technology-driven mode.At the same time,the comprehensive use of regulation and control methods should also be considered to improve the regulation effect and the regulation efficiency of coal production capacity.
其他文献
In order to effectively control petroleum hydrocarbon pollution by immobilisation technology,it is necessary to understanding the degradation pathways of petroleum hydrocarbon in immobilised petroleum-degradation bacteria system.However,the adsorption in
Polymer gel systems have been widely applied to control excessive water and improve oil recovery (IOR)in petroleum reservoirs.They are usually divided into two main types,in-situ cross-linked polymer gels,and pre-formed polymer gels.In recent years,nuclea
In order to develop high-efficiency and low-cost catalyst for the slurry-phase hydrocracking of vacuum residue (VR),the catalyst supported on natural rectorite was prepared,and the effect of calcination modification of rectorite on the catalyst properties
为了提升硬质地层破岩效率,满足深井、超深井钻井的提速需求,结合扭转冲击破岩及水力脉冲空化射流提速方法的特点,提出了双向耦合冲击钻井提速方法,并基于该方法研制了新型双向耦合冲击钻具.分析了双向耦合冲击提速方法及工具的结构特点,并从理论上进行了可行性分析与论证.采用数值模拟的方式分析了脉冲射流结构流场压力变化规律和脉动特性.分析结果表明:随着排量的增大,脉冲结构入口和出口压力脉动幅值呈线性增大,压降呈幂次方增长;叶轮叶片数量增加,入口和出口压力脉动幅值减小,但对压降的影响不大;叶轮直径增大,出口压力脉动幅值和
The existence of water phase occupies oil flow area and impacts the confined oil flow behavior at the solid substrate in inorganic nanopores of shale oil reservoirs,resulting in a completely different flow pattern when compared with the single oil phase f
Pickering emulsions stabilized by solid particles have gained much attention,which afford high stability,low toxicity,controllable rheological properties and stimuli-responsive behavior compared to the traditional emulsions emulsified by surfactants.Those
During the pipeline plugging process,both the pipeline and the pipe isolation tool (PIT) will be greatly damaged,due to the violent vibration of the flow field.In this study,it was proposed for the first time to reduce the vibration of the flow field duri
目的 提出一种双节点板式K形外置钢支撑-方钢管柱连接节点,并对其抗震性能进行研究.方法 采用ABAQUS软件对节点在单调荷载和往复荷载作用下的力学性能进行有限元分析,研究对拉螺栓直径、节点板厚度、方钢管柱壁厚、高强螺栓直径等参数对新型节点受力性能的影响.结果 新型节点具备良好的耗能能力和延性;新型节点的承载力和初始刚度受高强螺栓直径变化的影响较大;耗能能力和延性受对拉螺栓直径变化的影响较大.在往复荷载作用下,新型节点的滞回曲线较为饱满,延性系数大于4,新型节点具备良好的抗震性能.结论 新型节点的抗震性能良
Based on Iran\'s sixth development plan,the country\'s oil and gas industry requires an investment of about $200bn in the next five years to increase production.The Iranian government,to attract and motivate international oil company investment in the
With the maturity of horizontal drilling and hydraulic fracturing technologies,countries rich in shale gas have begun to promote the development of the shale gas industry.The impact of the booming shale gas industry on the regional economy has also become