When repairing nerves with adhesives, most researchers place glue directly on the nerve stumps, but this method does not fix the nerve ends well and allows glue to easily invade the nerve ends. In this study, we estab...When repairing nerves with adhesives, most researchers place glue directly on the nerve stumps, but this method does not fix the nerve ends well and allows glue to easily invade the nerve ends. In this study, we established a rat model of completely transected sciatic nerve injury and re- paired it using a modified 1 cm-length conduit with inner diameter of 1.5 mm. Each end of the cylindrical conduit contains a short linear channel, while the enclosed central tube protects the nerve ends well Nerves were repaired with 2-octyl-cyanoacrylate and suture, which complement the function of the modified conduit. The results demonstrated that for the same conduit, the av- erage operation time using the adhesive method was much shorter than with the suture method. No significant differences were found between the two groups in sciatic function index, motor evoked potential latency, motor evoked potential amplitude, muscular recovery rate, number of medullated nerve fibers, axon diameter, or medullary sheath thickness. Thus, the adhesive method for repairing nerves using a modified conduit is feasible and effective, and reduces the operation time while providing an equivalent repair effect.展开更多
Purpose: This paper aims to investigate the scientific productivity of China's science system. Design/methodology/approach: This paper employs the Malmquist productivity index(MPI) based on Data Envelopment Analys...Purpose: This paper aims to investigate the scientific productivity of China's science system. Design/methodology/approach: This paper employs the Malmquist productivity index(MPI) based on Data Envelopment Analysis(DEA).Findings: The results reveal that the overall efficiency of Chinese universities increased significantly from 2009 to 2016, which is mainly driven by technological progress. From the perspective of the functions of higher education, research and transfer activities perform better than the teaching activities.Research limitations: As an implication, the indicator selection mechanism, investigation period and the MPI model can be further extended in the future research.Practical implications: The results indicate that Chinese education administrative departments should take actions to guide and promote the teaching activities and formulate reasonable resource allocation regulations to reach the balanced development in Chinese universities.Originality/value: This paper selects 58 Chinese universities and conducts a quantified measurement during the period 2009–2016. Three main functional activities of universities(i.e. teaching, researching, and application) are innovatively categorized into different schemes, and we calculate their performance, respectively.展开更多
Given the significant role of the high-tech industry(HTI)in the national development,it is crucial to promote its balanced and efficient development.This study aims to investigate the innovation efficiency(IE)of the H...Given the significant role of the high-tech industry(HTI)in the national development,it is crucial to promote its balanced and efficient development.This study aims to investigate the innovation efficiency(IE)of the HTI of China’s mainland from 2009 to 2019 and find practical paths of driving its sustained development.Using an integrated approach within the data envelopment analysis framework,we obtain both static and dynamic IE,of which we also conduct in-depth temporal and spatial analysis based on the Moran index.The results show an uneven and spatially correlated distribution of the IE,and the technological upgrading is identified as the main way of improving the efficiency.Furthermore,the Tobit regression analysis is applied to explore the impact of environmental factors on the IE from the macro perspective.The per capita GDP and the number of R&D institutions reveal a significantly positive effect on the improvement of the IE.Based on our main findings,we also put forward corresponding policy suggestions to enhance the competitiveness of this industry in China.展开更多
基金supported by the International Technology Cooperation Program,No.S2014ZR0393
文摘When repairing nerves with adhesives, most researchers place glue directly on the nerve stumps, but this method does not fix the nerve ends well and allows glue to easily invade the nerve ends. In this study, we established a rat model of completely transected sciatic nerve injury and re- paired it using a modified 1 cm-length conduit with inner diameter of 1.5 mm. Each end of the cylindrical conduit contains a short linear channel, while the enclosed central tube protects the nerve ends well Nerves were repaired with 2-octyl-cyanoacrylate and suture, which complement the function of the modified conduit. The results demonstrated that for the same conduit, the av- erage operation time using the adhesive method was much shorter than with the suture method. No significant differences were found between the two groups in sciatic function index, motor evoked potential latency, motor evoked potential amplitude, muscular recovery rate, number of medullated nerve fibers, axon diameter, or medullary sheath thickness. Thus, the adhesive method for repairing nerves using a modified conduit is feasible and effective, and reduces the operation time while providing an equivalent repair effect.
基金the financial support from National Natural Science Foundation (NSFC, No. 71671181)
文摘Purpose: This paper aims to investigate the scientific productivity of China's science system. Design/methodology/approach: This paper employs the Malmquist productivity index(MPI) based on Data Envelopment Analysis(DEA).Findings: The results reveal that the overall efficiency of Chinese universities increased significantly from 2009 to 2016, which is mainly driven by technological progress. From the perspective of the functions of higher education, research and transfer activities perform better than the teaching activities.Research limitations: As an implication, the indicator selection mechanism, investigation period and the MPI model can be further extended in the future research.Practical implications: The results indicate that Chinese education administrative departments should take actions to guide and promote the teaching activities and formulate reasonable resource allocation regulations to reach the balanced development in Chinese universities.Originality/value: This paper selects 58 Chinese universities and conducts a quantified measurement during the period 2009–2016. Three main functional activities of universities(i.e. teaching, researching, and application) are innovatively categorized into different schemes, and we calculate their performance, respectively.
基金the support from the National Natural Science Foundation of China(NSFC,Nos.72071196,71671181)the support from the program for postgraduate education reform of the Capital University of Economics and Business(2023)
文摘Given the significant role of the high-tech industry(HTI)in the national development,it is crucial to promote its balanced and efficient development.This study aims to investigate the innovation efficiency(IE)of the HTI of China’s mainland from 2009 to 2019 and find practical paths of driving its sustained development.Using an integrated approach within the data envelopment analysis framework,we obtain both static and dynamic IE,of which we also conduct in-depth temporal and spatial analysis based on the Moran index.The results show an uneven and spatially correlated distribution of the IE,and the technological upgrading is identified as the main way of improving the efficiency.Furthermore,the Tobit regression analysis is applied to explore the impact of environmental factors on the IE from the macro perspective.The per capita GDP and the number of R&D institutions reveal a significantly positive effect on the improvement of the IE.Based on our main findings,we also put forward corresponding policy suggestions to enhance the competitiveness of this industry in China.
