Without the agricultural standardization, there would be no agricultural modernization. Through many years of effort, the building of agricultural standardization system in Zhejiang Province has made significant achie...Without the agricultural standardization, there would be no agricultural modernization. Through many years of effort, the building of agricultural standardization system in Zhejiang Province has made significant achievements, effectively giving play to the technology supporting role of agricultural standardization in adjusting agricultural industrial structure, and promoting the transformation and upgrading of industrial structure. But with the acceleration of the development of modern agriculture in Zhejiang Province, the building of agricultural standardization system poses new opportunities and challenges. This article describes the development course of the building of agricultural standardization system in Zhejiang Province, analyzes the current situation, characteristics and problems, and finally puts forward the following recommendations: improving and coordinating the working mechanism; improving standard system; focusing on demonstration and promotion; improving test and supervision system; focusing on human resources building; increasing capital input.展开更多
电网换相换流器型高压直流输电(line commutated converter-based high voltage direct current,LCC-HVDC)系统若发生后续换相失败,将严重影响交直流混联电网的安全稳定运行。文中首先针对LCC-HVDC系统故障恢复过程中电流偏差控制作用...电网换相换流器型高压直流输电(line commutated converter-based high voltage direct current,LCC-HVDC)系统若发生后续换相失败,将严重影响交直流混联电网的安全稳定运行。文中首先针对LCC-HVDC系统故障恢复过程中电流偏差控制作用阶段易再次发生换相失败的问题,对电流偏差控制参数与换相失败之间的关系进行理论分析,发现此阶段系统若不发生换相失败,逆变侧LCC直流电压和交流换相电压须满足一定的约束关系,且该约束关系受电流偏差控制参数的直接影响。然后,基于理论分析结果,提出一种电流偏差控制参数整定方法,可改善系统故障恢复过程中对直流电压恢复速度和程度的控制要求,使系统更易满足直流电压与交流换相电压稳定运行约束关系,以降低后续换相失败概率。最后,利用PSCAD/EMTDC仿真平台CIGRE标准测试模型验证了理论分析的正确性以及参数整定方法的有效性。展开更多
国家高度重视毕业后的医学教育培训,要求各大医疗机构必须积极完善住院医师规范化培训(住培)基地与教学方法,引导住院医师将在校学到的理论知识充分应用到临床实践当中,培养其成为真正合格的临床执业医师。但就目前来说,我国“住培”仍...国家高度重视毕业后的医学教育培训,要求各大医疗机构必须积极完善住院医师规范化培训(住培)基地与教学方法,引导住院医师将在校学到的理论知识充分应用到临床实践当中,培养其成为真正合格的临床执业医师。但就目前来说,我国“住培”仍存在诸多问题,其教学方法也尚未形成统一标准或模式。本文从带教老师经验、住院医师学习能力以及带教教学模式等方面,分析了“住培”的现状,同时针对现状问题,分别阐述了问题导向式教学方法(Problem Based Learrning,PBL)、迷你临床演练(Mini-Clinical Evaluation Exercise,Mini-CEX)联合操作技能直接观察(Direct Observation of Procedural Skills,DOPS)评估教学、体验式教学、以病例为基础的学习(Case Based Learning,CBL)+PBL教学以及微信平台辅助教学等在“住培”中的应用进展。展开更多
基金Supported by Project of Zhejiang Provincial Agricultural Products Quality Safety & Supervision and Testing Cooordination Meeting Office(2009-122012-13)
文摘Without the agricultural standardization, there would be no agricultural modernization. Through many years of effort, the building of agricultural standardization system in Zhejiang Province has made significant achievements, effectively giving play to the technology supporting role of agricultural standardization in adjusting agricultural industrial structure, and promoting the transformation and upgrading of industrial structure. But with the acceleration of the development of modern agriculture in Zhejiang Province, the building of agricultural standardization system poses new opportunities and challenges. This article describes the development course of the building of agricultural standardization system in Zhejiang Province, analyzes the current situation, characteristics and problems, and finally puts forward the following recommendations: improving and coordinating the working mechanism; improving standard system; focusing on demonstration and promotion; improving test and supervision system; focusing on human resources building; increasing capital input.
文摘电网换相换流器型高压直流输电(line commutated converter-based high voltage direct current,LCC-HVDC)系统若发生后续换相失败,将严重影响交直流混联电网的安全稳定运行。文中首先针对LCC-HVDC系统故障恢复过程中电流偏差控制作用阶段易再次发生换相失败的问题,对电流偏差控制参数与换相失败之间的关系进行理论分析,发现此阶段系统若不发生换相失败,逆变侧LCC直流电压和交流换相电压须满足一定的约束关系,且该约束关系受电流偏差控制参数的直接影响。然后,基于理论分析结果,提出一种电流偏差控制参数整定方法,可改善系统故障恢复过程中对直流电压恢复速度和程度的控制要求,使系统更易满足直流电压与交流换相电压稳定运行约束关系,以降低后续换相失败概率。最后,利用PSCAD/EMTDC仿真平台CIGRE标准测试模型验证了理论分析的正确性以及参数整定方法的有效性。
文摘国家高度重视毕业后的医学教育培训,要求各大医疗机构必须积极完善住院医师规范化培训(住培)基地与教学方法,引导住院医师将在校学到的理论知识充分应用到临床实践当中,培养其成为真正合格的临床执业医师。但就目前来说,我国“住培”仍存在诸多问题,其教学方法也尚未形成统一标准或模式。本文从带教老师经验、住院医师学习能力以及带教教学模式等方面,分析了“住培”的现状,同时针对现状问题,分别阐述了问题导向式教学方法(Problem Based Learrning,PBL)、迷你临床演练(Mini-Clinical Evaluation Exercise,Mini-CEX)联合操作技能直接观察(Direct Observation of Procedural Skills,DOPS)评估教学、体验式教学、以病例为基础的学习(Case Based Learning,CBL)+PBL教学以及微信平台辅助教学等在“住培”中的应用进展。