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Hua-bing Zhao,Yuan Long,Xing-hua Li,Liang Lu 대한토목학회 2016 KSCE JOURNAL OF CIVIL ENGINEERING Vol.20 No.1
Since the new tunnel is close to existing tunnel, the vibration wave induced by blasting endangers the safety and stabilization of the surrounding rock and the lining of existing tunnel. In the tunnel blasting vibration monitoring and safety prediction, Peak Particle Velocity (PPV) and vibration frequency are used widely as safety standards. To investigate the effect of blast-induced vibration from adjacent tunnel on existing tunnel, field monitoring experiments and a numerical method that is Finite Element Method (FEM) were adopted to study the blasting vibration velocity and vibration frequency of existing tunnel. Combined blasting vibration velocity with vibration frequency, the paper studied axial and radial blasting vibration velocity distributions and the corresponding Power Spectral Density (PSD) distributions of the existing tunnel under the effect of blast-induced vibration from adjacent subway tunnel. And the parameters of constitutive model and blasting loads were also discussed. It is shown that field monitoring experiment and numerical simulation can optimize blasting excavation program and provide a reference for other similar engineering projects.
OFDI对中国江苏区域创新能力的影响研究 ——基于吸收能力的视角
郭化?(Hua-Bing Guo) 한국아시아학회 2020 아시아연구 Vol.23 No.4
Based on the review of the existing theories and literature and the analysis of the development status and characteristics of Jiangsu’s OFDI, this paper carries out the empirical analysis as follows. The Hansen’s dynamic panel threshold model is applied to measure the threshold effect in terms of research and development(R&D) level, human resources, economic development level, financial development level and economic openness. The results show that there are minimum threshold requirements for other four other absorptive capacity indicators except the R&D level. Meanwhile, there is a ceiling limit threshold for economic development level, financial development level and economic openness, which means when the three indexes develop into moderate scale, the reverse technology spillover effect of OFDI would play a more positive role.
郭化?(Hua-Bing Guo) 한국아시아학회 2020 아시아연구 Vol.23 No.3
China"s economy is shifting from a stage of high-speed growth to a stage of high-quality development. How to use increasing foreign direct investment to enhance China"s overall technological innovation capability and promote "innovation-driven" strategic transformation has become the focus of attention everywhere. Based on the analysis of the characteristics of Jiangsu Province’s foreign direct investment, This essay also analyzed the panel data in 13 cities of Jiangsu Province in 11 years to find out its reverse technological overflow effect of OFDI. Research has found out that OFDI has positive influence on the regional innovation capacity in Jiangsu Province. After further analysis in different regions in Jiangsu province, it should be noted that different regions of Jiangsu Province are in the different development stages of OFDI. In the end, we can conclude some constructive suggestions and policy recommendations for the effective improvement of the reverse technology spillover effect of Jiangsu’s OFDI on technological progress.
ACCURACY OF LAMOST DR1 STELLAR PARAMETERS
GAO, HUA,ZHANG, HUA-WEI,XIANG, MAO-SHENG,HUANG, YANG,LIU, XIAO-WEI,LUO, A-LI,ZHANG, HAO-TONG,WU, YUE,ZHANG, YONG,LI, GUANG-WEI,DU, BING The Korean Astronomical Society 2015 天文學論叢 Vol.30 No.2
We adopt the PASTEL catalog combined with SIMBAD radial velocities as a testing standard to validate the stellar parameters (effective temperature $T_{eff}$, surface gravity log g, metallicity [Fe/H] and radial velocity $V_r$) from the first data release (DR1) of The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) survey. After applying data reduction and temperature constraints to the sample obtained by cross-identification, we compare the stellar parameters from DR1 and PASTEL. The results show that the DR1 results are reliable under certain conditions. We derive a dispersion of 110 K, 0.19 dex, 0.11 dex and $4.91kms^{-1}$ in specified effective temperature ranges, for $T_{eff}$, log g, [Fe/H] and $V_r$ respectively. Systematic errors are negligible except for those of $V_r$. In addition, for stars with PASTEL [Fe/H] < -1:5, the metallicities in DR1 are systematically higher than those in PASTEL.