The Influence of Industrial Upgrade in ‘Belt and Road’ Host countries on China’s OFDI Flow

Zi-Han Guo,Dae-Won Oh 한국무역통상학회 2021 무역통상학회지 Vol.21 No.2

In recent years, as the largest developing country and G2, China’s OFDI scale has been expanding, and its flow pattern and characteristics have also become an important aspect of academic research. Based on this, this paper uses panel data of 7 ‘Belt and Road’ Southeast Asian countries from 2003 to 2017 and introduces structural indicators of host countries to analyze the impact of Industrial upgrade of host countries on the flow direction of China’s OFDI. As a Result, we find that China’s OFDI has the preference of “low value-added industry”, “low GDP per capita” and “high total factor productivity”. The acceleration of industrial upgrading in the host country will lead to the decrease of China’s direct investment onto the country in the medium and long term, and make China’s OFDI flow to countries with a worse industrial structure.

Relevant Analysis on User Choice Tendency of Intelligent Tourism Platform under the Background of Text mining

Zi-Yang Liu(유자양),Kai Liao,Zi-Han Guo 한국컴퓨터정보학회 2019 韓國컴퓨터情報學會論文誌 Vol.24 No.9

The purpose of this study is to find out the relevant factors of the choice tendency of tourism users to Intelligent Tourism platform through big data analysis, which will help enterprises to make accurate positioning and improvement according to user information feedback in the tourism market in the future, so as to gain the favor of users" choice and achieve long-term market competitiveness. This study takes the Intelligent Tourism platform as the independent variable and the user choice tendency as the dependent variable, and explores the related factors between the Intelligent Tourism platform and the user choice tendency. This study make use of text mining and R language text analysis, and uses SPSS and AMOS statistical analysis tools to carry out empirical analysis. According to the analysis results, the conclusions are as follows: service quality has a significant positive correlation with user choice tendency; service quality has a significant positive correlation with tourism trust; Tourism Trust has a significant positive correlation with user choice tendency; service quality has a significant positive correlation with user experience; user experience has a significant positive correlation with user choice tendency Positive correlation effect.

Selection and validation of reference genes for RT-qPCR analysis in Sf9 cell line infected by Heliothis virescens ascovirus 3h (HvAV-3h)

Zi-Shu Chen,Ning-Ning Han,Jian Hong Li,Hu Wan,Guo-Hua Huang 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.2

The real-time quantitative reverse transcription PCR (qRT-PCR) is an efficient and pervasive technique for analysis gene expression. Despite the fact that this technique has been extensively used to explore the gene functions, the stability of the reference genes still requires being validated at different experimental conditions. This research aims to confirm that the expression stability of seven candidates reference genes under different concentrations sterile hemolymph containing virus (2, 4, 6, 108-fold) infects the Spodoptera frugiperda cells line (Sf9). The appropriate reference genes as endogenous controls were determined through four computational algorithms (ΔCt, NormFinder, BestKeeper, and geNorm) and an integrated online software RefFinder. According to results of this study, TUB and ACT1 were proved to be the most stable reference genes in E2 fold and E4 fold respectively. PPI was the best reference gene in E6 and E8 fold, 28S and TUB were the most stable pair reference genes through all samples. These results can facilitate basic researches of the molecular mechanism of HvAV- 3h and also prove to be helpful for the standard RT-PCR method.

Research on Impact of Airport Service Quality on Passenger Satisfaction

Zi-Yang Liu(유자양),Han-Wen Guo(곽한문) 한국컴퓨터정보학회 2019 한국컴퓨터정보학회 학술발표논문집 Vol.27 No.1

본 연구의 목적은 서로 다른 지역의 공항서비스품질이 고객만족도에 어떤 영향을 미치는지를 규명하고자 하는 것이다. 서로 다른 지역에 있는 공항의 서비스만족도를 고찰하는 것이다. 더 좋은 공항서비스 제고방안을 제시하려고 하는 것이다. 본 연구는 설문조사를 통해 SPSS와AMOS를 사용해 신뢰도분석, 타당성분석 그리고 구조방정식모형을 통해 통계분석을 실시하였다. 분석결과, 한국 인천공항 측에서 모든 가설 다 유익한 결과가 나타났고, 중국 수도공학 측에서 공항서비스 품질이 고객감지품질에 정의 영향과 감지품질이 고객충성도에 정의 영향을 유의하지 않은 결과를 얻었다.

Investigation on purification of α-Fe₂O₃ from zinc smelting iron slag by superconducting HGMS technology

Zhang, Peng,Li, Su-qin,Guo, Zi-jie,Zhang, Chang-quan,Yang, Chang-qiao,Han, Shuai-shuai The Korea Institute of Applied Superconductivity a 2018 한국초전도저온공학회논문지 Vol.20 No.2

Comprehensive utilization of zinc smelting iron slag not only solves environmental problems but also creates huge economic benefits. This study was conducted on the enrichment and recovery of ${\alpha}-Fe_2O_3$ from zinc smelting iron slag by superconducting HGMS technology. Several variables such as slurry flow velocity, slag concentration, magnetic field intensity and the amount of dispersing agent were tested in magnetic separation. In the experiments, obtained optimal magnetic separation parameters were 1.60 T of magnetic flux intensity, 600 mL/min of slurry flow velocity of, 15 g/L of slag concentration of, 0.10 g/L of dispersing agent. Under this condition, the content of ${\alpha}-Fe_2O_3$ was increased from 86.22% to 94.39% that can approach the Chinese national standard requirements (A level) of iron oxide red. It was concluded that using superconducting HGMS technology was an effective method for the purification of ${\alpha}-Fe_2O_3$ from zinc smelting iron slag.

Investigation on purification of α-Fe2O3 from zinc smelting iron slag by superconducting HGMS technology

Peng Zhang,Su-qin Li,Zi-jie Guo,Chang-quan Zhang,Chang-qiao Yang,Shuai-shuai Han 한국초전도.저온공학회 2018 한국초전도저온공학회논문지 Vol.20 No.2

Comprehensive utilization of zinc smelting iron slag not only solves environmental problems but also creates huge economic benefits. This study was conducted on the enrichment and recovery of α-Fe2O3 from zinc smelting iron slag by superconducting HGMS technology. Several variables such as slurry flow velocity, slag concentration, magnetic field intensity and the amount of dispersing agent were tested in magnetic separation. In the experiments, obtained optimal magnetic separation parameters were 1.60 T of magnetic flux intensity, 600 mL/min of slurry flow velocity of, 15 g/L of slag concentration of, 0.10 g/L of dispersing agent. Under this condition, the content of α-Fe2O3 was increased from 86.22% to 94.39% that can approach the Chinese national standard requirements (A level) of iron oxide red. It was concluded that using superconducting HGMS technology was an effective method for the purification of α-Fe2O3 from zinc smelting iron slag.

Gamma and X-ray irradiation as a phytosanitary treatment against various stages of Planococcus lilacinus (Hemiptera: Pseudococcidae)

Ma Chen,Liu Hui,Liu Bo,Zhao Ju-Peng,Zhao Qing-Ying,Song Zi-Jiao,Han Xin,Zhan Guo-Ping 한국응용곤충학회 2022 Journal of Asia-Pacific Entomology Vol.25 No.4

The cacao mealybug, Planococcus lilacinus Cock, is an important quarantine pest. Infested commodity should be subject to appropriate phytosanitary treatment, while irradiation is recommended for the cacao mealybug. Radio-tolerance comparison tests were conducted on the crawler, nymphs, and adult females of P. lilacinus at the X-ray radiation doses of 40, 80, and 120 Gy, respectively. The results showed that irradiation had a strong effect on preventing of development and reproduction; the adult female stage was identified as the most tolerant. During the following dose–response tests, among young and late females X-ray-irradiation (20–100 Gy), the late females were most tolerant when preventing F 1 generation 2nd instars emergence was used as the evaluation criterion. Minimum absorbed dose and its 95 % fiducial limits to provide probit 9 efficacy at 95 % confidence level (100 % mortality/inhibition in an estimated population of 93,616 individuals) were 131.5 Gy (122.5, 142.6 Gy) and 144.4 Gy (132.7, 159.4 Gy), estimating from the probit analysis on dose-mortality data of 1–30 and 1–10-day-old neonates laid by late females, respectively. In the large-scale confirmatory tests, a total of estimating 97,384 late females of P. lilacinus rearing on the pumpkins fruits were irradiated with gamma-ray at the target dose of 135 or 145 Gy (measured doses 126.1–163.0 Gy), which resulted in no F 1 generation 2nd nymphs developing during a 6-week post-treatment period. The treatment efficacy calculated is 99.9969 % at the 95 % confidence level. Therefore, a minimum absorbed dose of 163.0 Gy is recommended for phytosanitary treatment of P. lilacinus in infested commodity.