Based on the analysis of the importance of professional cluster construction by ecological theory,with the change of social demand for talents,this paper explores the practice of environmental chemical professional cl...Based on the analysis of the importance of professional cluster construction by ecological theory,with the change of social demand for talents,this paper explores the practice of environmental chemical professional cluster construction in Pingdingshan University,including gradually perfecting teaching conditions and reforming teaching mode,breaking through the limitations of resources,integrating the boundaries of colleges and departments,integrating multiple resources,innovating systems and mechanisms,reconstructing professional clusters,decon-structing professional connotations,reorganizing curriculum systems,etc.,in order to better build the ecological chain network of education in application-oriented colleges and universities,realize the deep integration of industry and education,train future-oriented interdisciplinary applied talents of new engineering,and realize the construction of characteristic professional cluster in application-oriented colleges.展开更多
针对老油田后续水驱阶段开发单元面临着高含水井比例大、平面注采不均衡、生产参数不合理及地面电动机配套设备能耗高和单元产量自然递减率大等问题,提出了采取限提并举调整单元产液结构、限制无效产液提升有效产液的注采一体化调整,以...针对老油田后续水驱阶段开发单元面临着高含水井比例大、平面注采不均衡、生产参数不合理及地面电动机配套设备能耗高和单元产量自然递减率大等问题,提出了采取限提并举调整单元产液结构、限制无效产液提升有效产液的注采一体化调整,以及配套更新地面拖动设备的优化方案,介绍了孤东四区3—4开发单元注采结构一体化调整节能示范区项目的主要内容、实施情况,并对项目实施效果和综合效益作了分析评价。实践证明,该方案实施后注采比保持在0.9~1.0之间,保证了开发单元平面注采均衡,开发单元年自然递减率下降了13.6%,单元油井系统效率达标率提高了24.7%,百米吨液单耗降低了0.1 k Wh,区域年节电能力达245.34×104k Wh,它的实施对于高孔、高渗油藏注聚单元后续水驱开发调整具有典型示范作用和推广价值。展开更多
For over half a century,numerical integration methods based on finite difference,such as the Runge-Kutta method and the Euler method,have been popular and widely used for solving orbit dynamic problems.In general,a sm...For over half a century,numerical integration methods based on finite difference,such as the Runge-Kutta method and the Euler method,have been popular and widely used for solving orbit dynamic problems.In general,a small integration step size is always required to suppress the increase of the accumulated computation error,which leads to a relatively slow computation speed.Recently,a collocation iteration method,approximating the solutions of orbit dynamic problems iteratively,has been developed.This method achieves high computation accuracy with extremely large step size.Although efficient,the collocation iteration method suffers from two limitations:(A)the computational error limit of the approximate solution is not clear;(B)extensive trials and errors are always required in tuning parameters.To overcome these problems,the influence mechanism of how the dynamic problems and parameters affect the error limit of the collocation iteration method is explored.On this basis,a parameter adjustment method known as the“polishing method”is proposed to improve the computation speed.The method proposed is demonstrated in three typical orbit dynamic problems in aerospace engineering:a low Earth orbit propagation problem,a Molniya orbit propagation problem,and a geostationary orbit propagation problem.Numerical simulations show that the proposed polishing method is faster and more accurate than the finite-difference-based method and the most advanced collocation iteration method.展开更多
基金Supported by Education and Teaching Reform Research Project of Pingdingshan University(2021-JY55,2020-JY05)Key Scientifie Research Project of Col-leges and Universities in Henan Province(22B180011)+2 种基金Project of Henan Sci-ence and Technology Department(232102320262)Ideological and Political Theories Teaching in Key Demonstration Courses at School Level in Pingdings-han College in 2022-Comprehensive Experiment of Environmental BiologyIde-ological and Political Theories Teaching in Demonstration Courses at School Level in Pingdingshan College in 2023-Ecological Engineering.
文摘Based on the analysis of the importance of professional cluster construction by ecological theory,with the change of social demand for talents,this paper explores the practice of environmental chemical professional cluster construction in Pingdingshan University,including gradually perfecting teaching conditions and reforming teaching mode,breaking through the limitations of resources,integrating the boundaries of colleges and departments,integrating multiple resources,innovating systems and mechanisms,reconstructing professional clusters,decon-structing professional connotations,reorganizing curriculum systems,etc.,in order to better build the ecological chain network of education in application-oriented colleges and universities,realize the deep integration of industry and education,train future-oriented interdisciplinary applied talents of new engineering,and realize the construction of characteristic professional cluster in application-oriented colleges.
文摘针对老油田后续水驱阶段开发单元面临着高含水井比例大、平面注采不均衡、生产参数不合理及地面电动机配套设备能耗高和单元产量自然递减率大等问题,提出了采取限提并举调整单元产液结构、限制无效产液提升有效产液的注采一体化调整,以及配套更新地面拖动设备的优化方案,介绍了孤东四区3—4开发单元注采结构一体化调整节能示范区项目的主要内容、实施情况,并对项目实施效果和综合效益作了分析评价。实践证明,该方案实施后注采比保持在0.9~1.0之间,保证了开发单元平面注采均衡,开发单元年自然递减率下降了13.6%,单元油井系统效率达标率提高了24.7%,百米吨液单耗降低了0.1 k Wh,区域年节电能力达245.34×104k Wh,它的实施对于高孔、高渗油藏注聚单元后续水驱开发调整具有典型示范作用和推广价值。
基金This study was co-supported by the National Key Research and Development Program of China(No.2021YFA0717100)the National Natural Science Foundation of China(Nos.12072270,U2013206).
文摘For over half a century,numerical integration methods based on finite difference,such as the Runge-Kutta method and the Euler method,have been popular and widely used for solving orbit dynamic problems.In general,a small integration step size is always required to suppress the increase of the accumulated computation error,which leads to a relatively slow computation speed.Recently,a collocation iteration method,approximating the solutions of orbit dynamic problems iteratively,has been developed.This method achieves high computation accuracy with extremely large step size.Although efficient,the collocation iteration method suffers from two limitations:(A)the computational error limit of the approximate solution is not clear;(B)extensive trials and errors are always required in tuning parameters.To overcome these problems,the influence mechanism of how the dynamic problems and parameters affect the error limit of the collocation iteration method is explored.On this basis,a parameter adjustment method known as the“polishing method”is proposed to improve the computation speed.The method proposed is demonstrated in three typical orbit dynamic problems in aerospace engineering:a low Earth orbit propagation problem,a Molniya orbit propagation problem,and a geostationary orbit propagation problem.Numerical simulations show that the proposed polishing method is faster and more accurate than the finite-difference-based method and the most advanced collocation iteration method.
