文章基于微观企业数据对比分析不同所有制结构下制糖企业全要素能源效率(total-factor energy efficiency,TFEE)的静态与动态差异,并运用面板分数响应模型检验所有制结构对TFEE的影响。研究发现:样本期间,外资企业的TFEE最高,其次为国...文章基于微观企业数据对比分析不同所有制结构下制糖企业全要素能源效率(total-factor energy efficiency,TFEE)的静态与动态差异,并运用面板分数响应模型检验所有制结构对TFEE的影响。研究发现:样本期间,外资企业的TFEE最高,其次为国有、多元混合投资和民营企业;四种所有制形式企业的能源效率均存在追赶效应,但制糖业仍存在能源效率差异现象。进一步的估计表明,外资、民营所有制形式对提高TFEE影响显著,比国有企业更有竞争力。因此,建议制糖业不断推进所有制改革,鼓励国有企业进行产权改制,吸收外资企业和民营企业的先进管理理念和技术,从而提高企业的能源效率。展开更多
As a new type of structure which has never been built, submerged floating tunnel was studied mainly by numerical simulations. To further study the seismic response of a submerged floating tunnel, the first model exper...As a new type of structure which has never been built, submerged floating tunnel was studied mainly by numerical simulations. To further study the seismic response of a submerged floating tunnel, the first model experiment of submerged floating tunnel （SFT） under the earthquake was carried out on the unique underwater shaking table in China. The experimental results show that vertical excitation induces larger response than horizontal and different inclination degrees of the tether also cause different seismic responses. Subsequently, based on the fluid-structure interaction theory, the corresponding numerical model is established. And comparing the numerical results with the experimental results, those of shaking table test. Numerical model adopted is effective for it is shown that the numerical results are basically identical with dynamic response of SFT.展开更多
文摘文章基于微观企业数据对比分析不同所有制结构下制糖企业全要素能源效率(total-factor energy efficiency,TFEE)的静态与动态差异,并运用面板分数响应模型检验所有制结构对TFEE的影响。研究发现:样本期间,外资企业的TFEE最高,其次为国有、多元混合投资和民营企业;四种所有制形式企业的能源效率均存在追赶效应,但制糖业仍存在能源效率差异现象。进一步的估计表明,外资、民营所有制形式对提高TFEE影响显著,比国有企业更有竞争力。因此,建议制糖业不断推进所有制改革,鼓励国有企业进行产权改制,吸收外资企业和民营企业的先进管理理念和技术,从而提高企业的能源效率。
基金Projects(51108224,51179026) supported by the National Natural Science Foundation of China
文摘As a new type of structure which has never been built, submerged floating tunnel was studied mainly by numerical simulations. To further study the seismic response of a submerged floating tunnel, the first model experiment of submerged floating tunnel （SFT） under the earthquake was carried out on the unique underwater shaking table in China. The experimental results show that vertical excitation induces larger response than horizontal and different inclination degrees of the tether also cause different seismic responses. Subsequently, based on the fluid-structure interaction theory, the corresponding numerical model is established. And comparing the numerical results with the experimental results, those of shaking table test. Numerical model adopted is effective for it is shown that the numerical results are basically identical with dynamic response of SFT.
