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해외직접투자와 현지국 흡수능력 관계 실증분석 연구: 패널문턱 회귀모형을 적용하여
갈남남 ( Nannan Ge ),유천 ( Cheon Yu ),황윤섭 ( Yun-seop Hwang ) 한국통상정보학회 2019 통상정보연구 Vol.21 No.2
해외직접투자의 유입은 투자자본을 형성하고 인적자원 수준을 향상시키며 기술이전과 경쟁 강화를 통해 투자 유치국의 기술을 진보시키고 경제 성장을 촉진시킨다. 개발도상국은 다양한 인센티브를 제공하며 해외직접투자 유치에 경쟁적으로 나서고 있다. 그러나 해외직접투자의 효과에 관한 선행연구는 일치된 결론을 보여주지 못하고 있다. 이는 투자 수용국의 흡수능력의 차이에 의해 FDI의 효과가 나타나기 때문이다. 본 연구는 흡수능력이 해외직접투자의 유입과 현지국 기술진보의 관계에 미치는 영향을 규명하기 위한 것으로, Hansen (1999)의 연구를 바탕으로 패널문턱 효과모형을 이용하여 실증분석을 실시하였다. 2006년부터 2016년까지 11년간 중국 23개성의 첨단산업의 자료를 수집하여 분석에 사용하였으며, 문턱 전후 각 구역의 차이에 대해서는 SUR검증을 실시하였다. 또한 흡수능력의 영향을 효율적으로 추정하기 위해서 기술격차, 연구개발비 투입, 인적자본 투입으로 구분하여 흡수능력을 구분하고 문턱변수로 사용하였다. 분석결과 FDI 유입이 현지국 기술진보에 미치는 영향은 흡수능력에 의해 결정되며 문턱효과가 존재하는 것으로 나타났다. 이는 현지국의 흡수능력에 따라 해외직접투자 파급효과의 한계효과가 달라질 수 있음을 의미한다. 또한 SUR 검증에 따라 문턱 전후 계수에 유의한 차이가 있는 것으로 나타났다. Prior studies on the relationship between FDI and the technological progress of the host country have not been consistent. The achievement of technological progress using FDI is determined by the absorptive capacity of the host country. This study investigated the relationship between absorption capacity, foreign direct investment, and technology progress using the panel data of China's high-tech industry from 2006 to 2016. Absorptive capacity was measured by dividing into the technical gap, the human resource input level, and R&D input level. For more efficient estimation, we used a panel threshold regression model reflecting the nonlinear change of absorptive capacity. The results showed that technological progress through FDI was influenced by absorptive capacity and there was a threshold effect.
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Nannan Zhang,Diqiu Liu,Wei Zheng,Hua He,Bo Ji,Qing Han,Feng Ge,Chaoyin Chen 한국유전학회 2014 Genes & Genomics Vol.36 No.6
The basic leucine zipper (bZIP) proteins areubiquitous in plants and play important roles in plantdefense responses. In this study, based on an expressedsequence tag from a suppression subtractive hybridizationcDNA library of Lilium regale Wilson during Fusariumoxysporum f. sp. lilii infection, a novel bZIP transcriptionfactor gene LrbZIP1 was isolated from L. regale root usingthe rapid amplification of cDNA ends method. The predictedprotein of LrbZIP1 with 142 amino acid residuescontains a basic domain signature and a leucine zippermotif. The quantitative reverse transcription-PCR (qRTPCR)analysis showed that the transcription level of Lrb-ZIP1 was higher in roots of L. regale than in young stemsand leaves. Moreover, the expression of LrbZIP1 was upregulatedin the incompatible interaction between L. regaleand F. oxysporum f. sp. lilii as well as after treatments withstress-related signaling molecules. To verify the function ofLrbZIP1, a constitutive expression vector of LrbZIP1 wasconstructed and transferred into tobacco (Nicotiana tabacumL. cv Xanthi). The results of Southern blotting andqRT-PCR analyses demonstrated that the LrbZIP1 wasintegrated into genome of the tobacco transformants andhighly expressed. Under normal conditions, the T1 transgenictobacco lines showed higher antioxidant enzymeactivities and transcription levels of several resistancerelatedgenes than the wild type. Moreover, the T1 transgenictobacco plants showed strong resistance to F. oxysporumf. sp. lilii infection.
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Effect of heat shield on the thermal fields during sapphire crystal growth by Kyropoulos method
Yuqing Guo,Nannan Ge,Kai Wang,Meng Shen,Ming Wang 한양대학교 세라믹연구소 2016 Journal of Ceramic Processing Research Vol.17 No.11
In this paper, the numerical computation was performed to investigate the influence of the heat shields of sapphire crystalfurnace on temperature distributions for the Kyropoulos sapphire crystal growth process. The heat shields with different shieldradius, shield layers and the shield materials were considered, the Kyropoulos growth process was simulated by the finiteelementmethod. It is found that radial temperature gradient of crystal would increase along with the increase of the shieldradius and the decrease of the layers of top shield. If properly increasing the shield radius and the layers of the top shield, axialtemperature gradient in crystal would decrease, but the layers of side shield have little influence on the temperature in crystal. The heat shields made of different materials were compared by analyzing the crystal temperature distribution. Simulationresults showed that temperature distribution in crystal by W-Mo shield is much closer to that of ZrO2 shield, both oftemperature distribution are higher than that of graphite heat shield.
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Hua He,Diqiu Liu,Nannan Zhang,Wei Zheng,Qing Han,Bo Ji,Feng Ge,Chaoyin Chen 한국유전학회 2014 Genes & Genomics Vol.36 No.4
Pathogenesis-related (PR) proteins play keyroles in plant responses to pathogens and abiotic stresses. In this study, nine novel PR genes were isolated from Liliumregale Wilson, which is a wild lily species of Chinawith high-level resistance to the soilborne fungal pathogenFusarium oxysporum f. sp. lilii, and homology analysisclassified them into the PR10 family. These novel LrPR10swere clustered together with PR10s from monocotyledonsin a phylogenetic tree, moreover, phylogenetic analysisdivided the nine LrPR10s into two groups. The main-chainconformation and folding patterns of the LrPR10s werehighly conserved with other plant PR10s. The expressionpatterns of the nine LrPR10s in L. regale during normaldevelopment were examined by QRT-PCR, and the transcriptionlevels of the LrPR10s were relatively high inroots. Furthermore, QRT-PCR analysis indicated that theexpression levels of LrPR10-1, LrPR10-2, LrPR10-5,LrPR10-6, and LrPR10-7 in L. regale roots were up-regulatedby two or more stress-related signaling moleculesincluding salicylic acid, jasmonic acid, ethylene, and H2O2,while the other four LrPR10s were repressed by these foursignaling molecules. In addition, five members of theLrPR10 gene family including LrPR10-2, LrPR10-4,LrPR10-5, LrPR10-6, LrPR10-7, and LrPR10-9 werestrongly induced by F. oxysporum in resistant L. regalecompared with the susceptible Lilium Oriental hybrid‘Siberia’. The other four LrPR10s were down-regulated byF. oxysporum infection. In summary, our results indicatethat the members of PR10 gene family are involved inL. regale defense responses against F. oxysporum f. sp. lilii.
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