http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
DOAN, Quyen Thuc,HO, Thu Thi Hoai,DOAN, Quynh Huong Korea Distribution Science Association 2022 The Journal of Asian Finance, Economics and Busine Vol.9 No.8
This study aims to examine the influence of capital structure on the business efficiency of joint stock commercial banks listed on the Vietnamese stock market. The article uses data collected from the financial statements of 15 prominent joint-stock commercial banks out of 27 joint-stock commercial banks listed in Vietnam from 2011 to 2021. The research uses E-view software in quantitative analysis to build regression models to determine the relationship and the impact of capital structure factors on the business efficiency of listed joint stock commercial banks. Research results show that ROA is affected by 2 variables of capital structure. It is the sum of customer deposits to total assets and total liabilities to total equity. Total debt to total equity and total customer deposits to total assets both have a negative effect on ROA. For the regression results of ROA with all control variables, the control variables have a positive relationship with the dependent variable. The article has provided recommendations based on the research findings to determine the proper capital structure. Managers must solve the outstanding amount of mobilized capital in previous years, combined with the bad debt handling activities that have arisen.
Doan Ngoc Chi Nam,Jong Il Yoon,Dinh Quang Truong,Kyoung Kwan Ahn 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
An ionic polymer metal composite (IPMC) actuator is an Electro-Active Polymer (EAP) that bends in response to a small applied electrical field as a result of mobility of cations in the polymer network. This paper proposes a cascaded model of Preisach operator and fuzzy Nonlinear Auto Regressive Exogenous (NARX) structure for modeling and identifying the nonlinear behavior of on type IPMC actuator. Firstly, a set of open loop input voltage signals were applied to the IPMC in order to investigate the IPMC bending actuation. Consequently, Secondly, a proper Preisach type fuzzy NARX model is developed with one input and one output to estimate the IPMC tip displacement. By employing the collected training data, an identification scheme based on incorporation of least square method and Particle Swarm Optimization (PSO) algorithm is then carried out to tune the model parameters.
Doan, An Tran,Thi, Xuan Dieu Nguyen,Nguyen, Phi Hung,Thi, Viet Nga Nguyen,Kim, Sung Jin,Vo, Vien Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.6
Graphitic g-$C_3N_4-WO_3$ composite was synthesized simply by decomposing melamine in the presence of $WO_3$ at $500^{\circ}C$. The obtained material was characterized by XRD, SEM, IR and XPS. The results showed that the as-prepared composite exhibits orthorhombic $WO_3$ phase coated by g-$C_3N_4$ and the g-$C_3N_4$ decomposed completely with N-doped $WO_3$ remaining at elevated calcination temperatures. The photocatalytic activity of the composite was evaluated by the photodegradation of methylene blue under visible light. An enhancement in photocatalytic activity for the graphitic g-$C_3N_4-WO_3$ composite compared to the conventional nitrogen-doped $WO_3$ was observed, which can be attributed to the presence of g-$C_3N_4$ in the material.
Quantifying the Effect of Economic Sanctions on Trade in Cultural Goods
Doan Ngoc Thang,Tran Manh Ha 한국국제경제학회 2023 International Economic Journal Vol.37 No.3
The question of whether the imposition of economic sanctions impairs or nurtures cultural affinity remains controversial. In effect, this paper investigates the effect of economic sanctions on the trade of cultural goods as a proxy for cultural proximity, using cross-country data with 5,304 country pairs ranging from the years 1996–2019. Through extensive robustness checks, our main findings reveal that economic sanctions drive up the trade of cultural goods. The effect on the trade of cultural goods is heterogeneous across various forms of economic sanctions. While military, arms, trade, and travel sanctions are trade facilitators, financial and other sanctions are trade barriers. These effects are conditional on the level of economic development in the sanctioned countries and change over time. Our findings suggest cultural implications of economic sanctions in foreign policy design.
Doan, Van-Tuan,Kim, Ki-Young,Choi, Woojin,Kim, Dae-Wook The Korean Institute of Power Electronics 2017 JOURNAL OF POWER ELECTRONICS Vol.17 No.1
The three-phase four-leg voltage-source inverter topology is an interesting option for the three-phase four-wire system. With an additional leg, this topology can achieve superior performance under unbalanced and nonlinear load conditions. However, because of the low bandwidth of conventional controllers in high-power inverter applications, the system cannot guarantee a balanced output voltage under the unbalanced load condition. Most of the methods proposed to solve this problem mainly use the multiple synchronous frame method, which requires several controllers and a large amount of computation because of frame transformation. This study proposes a simple hybrid controller that combines proportional-integral (PI) and resonant controllers in the synchronous frame synchronized with the positive-sequence component of the output voltage of the three-phase four-leg inverter. The design procedure for the controller and the theoretical analysis are presented. The performance of the proposed method is verified by the experimental results and compared with that of the conventional PI controller.