经济发展与环境保护能否实现双赢是高质量发展阶段函待解决的问题,因此从效率评价的角度对我国多维目标的实现效果进行综合评价具有重要的现实意义。本文创新性地将污染的空间溢出效应引入至效率评价模型中,构建了一个改进的SBM(Improve...经济发展与环境保护能否实现双赢是高质量发展阶段函待解决的问题,因此从效率评价的角度对我国多维目标的实现效果进行综合评价具有重要的现实意义。本文创新性地将污染的空间溢出效应引入至效率评价模型中,构建了一个改进的SBM(Improved Slack Based Model,ISBM),对中国省级绿色生产效率和绿色全要素生产率进行了全新测度,随后利用Tobit模型对绿色生产效率的影响因素进行实证分析,主要得出以下几点结论:首先,中国的绿色生产效率在样本期内呈波动上升超势,但均未达到有效水平,其中东部地区最高,西部次之,中部最低;其次,绿色全要素生产率在考察期内呈微弱下降趋势,其中技术进步减缓是阻碍其提高的核心因素;再次,绿色生产效率的影响因素存在明显的区域异质性,综合而言,加强环保规制力度和提高城镇化率是提升全国绿色生产效率的有效手段,而东部地区需警惕二产回流,西部地区则应摒弃“唯GDP论的逐底竞赛”;最后,绿色生产效率最低的省份是处于新城市集群地理中枢位置的人口大省,而非是经验认知中的高度工业化省份,产生这一结果的根源在于这些省份承载了大量来自其他省份的污染转移,这一结果再一次证明非期望投入是效率评价体系中不可忽视的重要部分。展开更多
The formula of input impedance of dipole antenna in Gigahertz Transverse ElectroM agnetic(GTEM) cell based on the dyadic Green's function is first obtained in this paper. The validation of the formula is verified ...The formula of input impedance of dipole antenna in Gigahertz Transverse ElectroM agnetic(GTEM) cell based on the dyadic Green's function is first obtained in this paper. The validation of the formula is verified by the results of theoretical derivation and simulation with well agreements. In comparison with the formula of input impedance in free space, the relationship between the change of input impedance with the length of antenna and the position of antenna in GTEM cell is obtained. In addition, some meaningful conclusions are presented, which not only can be referred by the further research of ElectroM agnetic Interference(EMI) measurements in GTEM cell, but also provide the theoretical basis for testing compensation and error analysis.展开更多
文摘经济发展与环境保护能否实现双赢是高质量发展阶段函待解决的问题,因此从效率评价的角度对我国多维目标的实现效果进行综合评价具有重要的现实意义。本文创新性地将污染的空间溢出效应引入至效率评价模型中,构建了一个改进的SBM(Improved Slack Based Model,ISBM),对中国省级绿色生产效率和绿色全要素生产率进行了全新测度,随后利用Tobit模型对绿色生产效率的影响因素进行实证分析,主要得出以下几点结论:首先,中国的绿色生产效率在样本期内呈波动上升超势,但均未达到有效水平,其中东部地区最高,西部次之,中部最低;其次,绿色全要素生产率在考察期内呈微弱下降趋势,其中技术进步减缓是阻碍其提高的核心因素;再次,绿色生产效率的影响因素存在明显的区域异质性,综合而言,加强环保规制力度和提高城镇化率是提升全国绿色生产效率的有效手段,而东部地区需警惕二产回流,西部地区则应摒弃“唯GDP论的逐底竞赛”;最后,绿色生产效率最低的省份是处于新城市集群地理中枢位置的人口大省,而非是经验认知中的高度工业化省份,产生这一结果的根源在于这些省份承载了大量来自其他省份的污染转移,这一结果再一次证明非期望投入是效率评价体系中不可忽视的重要部分。
基金Supported by Chinese Academy of Sciences(No.Y140110213)
文摘The formula of input impedance of dipole antenna in Gigahertz Transverse ElectroM agnetic(GTEM) cell based on the dyadic Green's function is first obtained in this paper. The validation of the formula is verified by the results of theoretical derivation and simulation with well agreements. In comparison with the formula of input impedance in free space, the relationship between the change of input impedance with the length of antenna and the position of antenna in GTEM cell is obtained. In addition, some meaningful conclusions are presented, which not only can be referred by the further research of ElectroM agnetic Interference(EMI) measurements in GTEM cell, but also provide the theoretical basis for testing compensation and error analysis.
