3篇
您的检索式：作者名="Defeng Zou"
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| 1 | Water resource utilization efficiency and spatial spillover effects in China显示文摘基于水脚印和灰色的省的面板数据浇脚印,并且在数据包封分析的帮助下当模特儿就而言并且没有考虑不受欢迎的产量,这份报纸从 1997 ~ 2011 在中国估计水资源利用效率。空间 weighting 矩阵基于经济空间的距离功能被建立讨论水资源利用效率的空间自相关。在绝对集中模型的帮助下,这份报纸断定那在那里存在在水资源利用效率的集中。在考虑并且没有考虑不受欢迎的产量的条件下面,完成集中的一半的程度分别地花大约 52.6 和 5.6 年。由空间 Durbin econometric 模型的平均数,这份报纸在中国学习省的水资源利用效率的空间溢出效果。结果如下。1 ) 与考虑并且没有考虑不受欢迎的产量,在在中国的省的水资源效率有重要空间关联。2 ) 在二个盒子下面,空间 autoregressive 系数() 分别地是 0.278 和 0.507,在 1% 意义水平。在那里存在省的水资源利用效率的空间溢出效果。3 ) 与考虑不受欢迎的产量,教育资金的这些因素,交通基础结构,和工业、农业的水消费比例有积极影响。外国直接投资的这些因素,工业增值水消费每 1 万,元,人均的水消费,和全部的降水有否定影响。4 ) 没有考虑不受欢迎的产量, GDP 的因素在水资源利用效率上每劳动者有更大的积极重要影响。然而,在 1 万元和交通基础结构的工业增值水消费的事实没有重要影响。5 ) 不管水资源利用效率的不受欢迎的输出,对在中国的现在的真实的水资源利用的评价将被弄歪,政策制定的愿望被误导。就环境因素而言的水效率措施(例如灰色的水脚印) 是更合理的。 | SUN Caizhi ZHAO Liangshi ZOU Wei ZHENG Defeng | 2014 | Journal of Geographical Sciences2014，24，5： | 29 |
| 2 | Overexpression of microRNA-124 promotes the neuronal differentiation of bone marrow-derived mesenchymal stem cells显示文摘microRNAs(miRNAs) play an important regulatory role in the self-renewal and differentiation of stem cells. In this study, we examined the effects of miRNA-124(miR-124) overexpression in bone marrow-derived mesenchymal stem cells. In particular, we focused on the effect of overexpression on the differentiation of bone marrow-derived mesenchymal stem cells into neurons. First, we used GeneChip technology to analyze the expression of miRNAs in bone marrow-derived mesenchymal stem cells, neural stem cells and neurons. miR-124 expression was substantially reduced in bone marrow-derived mesenchymal stem cells compared with the other cell types. We constructed a lentiviral vector overexpressing miR-124 and transfected it into bone marrow-derived mesenchymal stem cells. Intracellular expression levels of the neuronal early markers β-III tubulin and microtubule-associated protein-2 were significantly increased, and apoptosis induced by oxygen and glucose deprivation was reduced in transfected cells. After miR-124-transfected bone marrow-derived mesenchymal stem cells were transplanted into the injured rat spinal cord, a large number of cells positive for the neuronal marker neurofilament-200 were observed in the transplanted region. The Basso-Beattie-Bresnahan locomotion scores showed that the motor function of the hind limb of rats with spinal cord injury was substantially improved. These results suggest that miR-124 plays an important role in the differentiation of bone marrow-derived mesenchymal stem cells into neurons. Our findings should facilitate the development of novel strategies for enhancing the therapeutic efficacy of bone marrow-derived mesenchymal stem cell transplantation for spinal cord injury. | Defeng Zou Yi Chen Yaxin Han Chen Lv Guanjun Tu | 2014 | Neural Regeneration Research2014，9，12： | 15 |
| 3 | Spectral filtering effect on multi-pulsing induced by chirped fiber Bragg grating in dispersion-managed mode-locked Yb-doped fiber lasers显示文摘We numerically and experimentally investigate the multi-pulsing mechanism in a dispersion-managed mode-locked Ybdoped fiber laser.Multi-pulsing occurs primarily owing to the inherent filtering effect of the chirped fiber Bragg grating.The spectral filtering effect restricts the spectral broadening induced by self-phase modulation and causes extra loss,leading to a decreased pump power threshold for the multi-pulsing state.Numerical simulations show that multi-pulsing emerges at a lower pump power when the spectral filter bandwidth becomes narrower.In the experiment,the spectral width increases as the net cavity dispersion approaches zero.Pulses with wider spectral widths experience more loss from the spectral filtering effect,leading to a decreased pump power threshold for multi-pulsing.Therefore,the net cavity dispersion also has an impact on the multi-pulsing threshold.Based on this conclusion,we devise a strategy to obtain single-pulsing operation with the shortest pulse width and the highest pulse energy. | Dongyu Yan Bowen Liu Defeng Zou Jie Guo Yuxi Chu Youjian Song Minglie Hu | 2021 | High Power Laser Science and Engineering2021，9，3： | 0 |
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