This article mainly introduces the innovative internship and training model of vocational colleges,including five aspects such as“four-party collaboration,three-stage progression,four-way integration,value-added eval...This article mainly introduces the innovative internship and training model of vocational colleges,including five aspects such as“four-party collaboration,three-stage progression,four-way integration,value-added evaluation,and double selection and promotion.”The model aims to improve students’practical skills and professional quality to better adapt to market demand and social development.The article also presents the prospects of the future internship and training model,including strengthening cooperation and communication with industry enterprises,focusing on students’personalized development and practical skill cultivation,and establishing a scientific and objective evaluation and feedback mechanism.展开更多
Studying the spatiotemporal variations in ecosystem services and their interrelationships on the Loess Plateau against the background of the gully control and land consolidation(GCLC)project has significant implicatio...Studying the spatiotemporal variations in ecosystem services and their interrelationships on the Loess Plateau against the background of the gully control and land consolidation(GCLC)project has significant implications for ecological protection and quality development of the Yellow River Basin.Therefore,in this study,we took Yan'an City,Shaanxi Province of China,as the study area,selected four typical ecosystem services,including soil conservation service,water yield service,carbon storage service,and habitat quality service,and quantitatively evaluated the spatiotemporal variation characteristics and trade-offs and synergies of ecosystem services from 2010 to 2018 using the Integrated Valuation of Ecosystem Services and Trade-offs(InVEST)model.We also analysed the relationship between the GCLC project and regional ecosystem service changes in various regions(including 1 city,2 districts,and 10 counties)of Yan'an City and proposed a coordinated development strategy between the GCLC project and the ecological environment.The results showed that,from 2010 to 2018,soil conservation service decreased by 7.76%,while the other three ecosystem services changed relatively little,with water yield service increasing by 0.56% and carbon storage service and habitat quality service decreasing by 0.16% and 0.14%,respectively.The ecological environment of Yan'an City developed in a balanced way between 2010 and 2018,and the four ecosystem services showed synergistic relationships,among which the synergistic relationships between soil conservation service and water yield service and between carbon storage service and habitat quality service were significant.The GCLC project had a negative impact on the ecosystem services of Yan'an City,and the impact on carbon storage service was more significant.This study provides a theoretical basis for the scientific evaluation of the ecological benefits of the GCLC project and the realization of a win-win situation between food security and ecological security.展开更多
多区域综合能源系统(integrated energy system,IES)的能量供需关系复杂,增加了系统规划及运行调度的难度。为此,提出了计及区域能量互济的多目标双层优化策略。其中,规划层选取年化总成本、㶲效率及年碳排放量作为优化子目标,并对子目...多区域综合能源系统(integrated energy system,IES)的能量供需关系复杂,增加了系统规划及运行调度的难度。为此,提出了计及区域能量互济的多目标双层优化策略。其中,规划层选取年化总成本、㶲效率及年碳排放量作为优化子目标,并对子目标赋予权重因子,建立多目标优化模型;调度层以日运行成本最低为目标函数,并计及区域能量互济的作用。分别采用线性权重递减的粒子群优化算法和整数线性规划方法求解规划及调度问题,实现了二者的协同优化。算例分析表明:双层优化策略将IES的运行特性纳入规划过程,提高了规划方案的可行性;应合理配置多目标优化的权重因子,以实现多目标的合理折中;区域能量互济能够优化IES的运行方式,提高综合效益。展开更多
基金Special Project for Research on Vocational Education and Industrial Talent in Shandong Province in 2023:General Fund Project“Innovative Research on the‘Four-Way Integration,Three-Stage Progression,Four-Way Progression,Value-Added Evaluation,Double Selection and Promotion’Internship Training Mode Under the Reform of the Modern Vocational Education System Construction”(Project number:2023ZX058)。
文摘This article mainly introduces the innovative internship and training model of vocational colleges,including five aspects such as“four-party collaboration,three-stage progression,four-way integration,value-added evaluation,and double selection and promotion.”The model aims to improve students’practical skills and professional quality to better adapt to market demand and social development.The article also presents the prospects of the future internship and training model,including strengthening cooperation and communication with industry enterprises,focusing on students’personalized development and practical skill cultivation,and establishing a scientific and objective evaluation and feedback mechanism.
基金supported by the Innovation Capability Support Program of Shaanxi Province,China(2023-CX-RKX-102)the Key Research and Development Program of Shaanxi Province,China(2022FP-34)+1 种基金the Open Foundation of the Key Laboratory of Natural Resource Coupling Process and Effects(2023KFKTB008)the Open Fund of Shaanxi Key Laboratory of Land Consolidation,China(300102352502).
文摘Studying the spatiotemporal variations in ecosystem services and their interrelationships on the Loess Plateau against the background of the gully control and land consolidation(GCLC)project has significant implications for ecological protection and quality development of the Yellow River Basin.Therefore,in this study,we took Yan'an City,Shaanxi Province of China,as the study area,selected four typical ecosystem services,including soil conservation service,water yield service,carbon storage service,and habitat quality service,and quantitatively evaluated the spatiotemporal variation characteristics and trade-offs and synergies of ecosystem services from 2010 to 2018 using the Integrated Valuation of Ecosystem Services and Trade-offs(InVEST)model.We also analysed the relationship between the GCLC project and regional ecosystem service changes in various regions(including 1 city,2 districts,and 10 counties)of Yan'an City and proposed a coordinated development strategy between the GCLC project and the ecological environment.The results showed that,from 2010 to 2018,soil conservation service decreased by 7.76%,while the other three ecosystem services changed relatively little,with water yield service increasing by 0.56% and carbon storage service and habitat quality service decreasing by 0.16% and 0.14%,respectively.The ecological environment of Yan'an City developed in a balanced way between 2010 and 2018,and the four ecosystem services showed synergistic relationships,among which the synergistic relationships between soil conservation service and water yield service and between carbon storage service and habitat quality service were significant.The GCLC project had a negative impact on the ecosystem services of Yan'an City,and the impact on carbon storage service was more significant.This study provides a theoretical basis for the scientific evaluation of the ecological benefits of the GCLC project and the realization of a win-win situation between food security and ecological security.
文摘多区域综合能源系统(integrated energy system,IES)的能量供需关系复杂,增加了系统规划及运行调度的难度。为此,提出了计及区域能量互济的多目标双层优化策略。其中,规划层选取年化总成本、㶲效率及年碳排放量作为优化子目标,并对子目标赋予权重因子,建立多目标优化模型;调度层以日运行成本最低为目标函数,并计及区域能量互济的作用。分别采用线性权重递减的粒子群优化算法和整数线性规划方法求解规划及调度问题,实现了二者的协同优化。算例分析表明:双层优化策略将IES的运行特性纳入规划过程,提高了规划方案的可行性;应合理配置多目标优化的权重因子,以实现多目标的合理折中;区域能量互济能够优化IES的运行方式,提高综合效益。
