http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Effects of Electric Filed on Electrospray Process: Experimental and Simulation Study
Xuan Dong,Yuansheng Zheng,Binjie Xin,Huaiyuan Liu,Lantian Lin 한국섬유공학회 2020 Fibers and polymers Vol.21 No.11
At present, there exists a widely-held view that electric field plays an extremely important role in the electrosprayprocess. Aimed at investigating into the effects of electric field distribution and intensity on the electrospray process andresultant microsphere diameter, a variety of necessary and relevant tests were performed in this study by inviting an auxiliaryelectrode ring. The three-dimensional electric fields of the electrospray system were simulated, in addition, high-speedphotography was adopted to recognize the electrospray modes. The results of a series of electrospray experiments demonstratedthat not only electrospray mode but also resultant microsphere diameters are influenced, to a considerable degree, by the electricfield. Such simulation results were verified by above-mentioned experiments that from higher electric field intensity comessmaller microsphere diameter, due to the fission caused by the surface charge, and besides, more uniform electric fielddistribution produces more uniform microsphere diameter.
Minimum Wages and Firm Productivity: Evidence from Vietnamese Manufacturing Firms
Dong Xuan Nguyen 한국국제경제학회 2019 International Economic Journal Vol.33 No.3
This paper empirically examines the minimum-wage impact on firm productivity. Using a detailed Vietnamese firm-level dataset from 2010 through 2015, the regression results suggest that firms raise their labor productivity, total factor productivity, capital intensity and revenue in response to increased minimum wage standards. Firms that pay their workers below the minimum wage react more positively in raising their labor productivity than high-wage firms. Minimum wages has had a more pronounced impact on firms’ labor productivity, total factor productivity and capital intensity since the uniform wage rate was introduced for both domestic private and foreign-invested enterprises in 2012.
Xuan-Dong Nguyen,Ngo Xuan Quang,Thanh Luu Pham,Bijeesh Kozhikkodan Veettil 한국해양과학기술원 2022 Ocean science journal Vol.57 No.1
The Mekong River Delta is a hotspot of aquaculture and fish biodiversity. In this study, fish community structure, migration, threatened status and economic value were investigated in the Co Chien River (COR) from August 2017 to July 2019. A total of 3640 fish specimens were collected from 11 sampling stations in the COR. These belong to 133 species of 107 genera of 58 families of 17 orders. The Perch-like order (Perciformes) is the most diverse group, with 65 species accounting for 48.87% of total species collected. The catfish order (Siluriformes) is the second-most diverse group with 15 species (11.28%) and the carps (Cypriniformes) with 14 species (10.53%) is the third. The remaining major groups in the order of diversity are the Herring (Clupeiformes) consisting of 9 species (6.77%) and the Flounder (Pleuronectiformes) consisting of 7 species (5.26%). The remaining orders have number of species varying from 1 to 3 (0.75–2.26%). Among the 133 species recorded, 6 species were considered as Vulnerable category based on the Vietnam Red Data Book (2007). According to the IUCN Red list (2021), 1 species (Coilia mystus) is Endangered (0.75%), 2 species (Maculabatis gerrardi and Pangasius krempfi) are Vulnerable (1.50%), 4 species are Near Threatened (3.01%), 6 species are Data deficient (4.51%), and 76 species are considered as Least concern (57.14%). The results shown that 79 species were migratory fishes (20 species migrated from the upstream and 59 species migrated from the sea), 41 species are endemic species for the MR (30.83% of the total species collected and 23.70% of total endemic species of the MR) and 36 fish species are considered as of local economic value (27.07%). The diversity of fish species was found to be more diverse in the dry season than the wet season, which indicates the influence of river water salinity changes on fish diversity in the region.
Nguyen Dong Xuan,Nishisaka Emi,Kawauchi Moriyuki,Nakazawa Takehito,Sakamoto Masahiro,Honda Yoichi 한국미생물학회 2020 The journal of microbiology Vol.58 No.12
Terminators and introns are vital regulators of gene expression in many eukaryotes; however, the functional importance of these elements for controlling gene expression in Agaricomycetes remains unclear. In this study, the effects of Ceriporiopsis subvermispora terminators and introns on the expression of a recombinant hygromycin B phosphotransferase gene (hph) were characterized. Using a transient transformation system, we proved that a highly active terminator (e.g., the gpd terminator) is required for the efficient expression of the hph gene. Mutational analyses of the C. subvermispora gpd terminator revealed that hph expression was dictated by an A-rich region, which included a putative positioning element, and polyadenylation sites. In contrast, our results indicated that introns are not required for the expression of hph directed by the Csβ1-tub and Csgpd promoters in C. subvermispora. This study provides insights into the functions and cis-element requirements of transcriptional terminators in Agaricomycetes, which may be relevant for designing recombinant genes for this important fungal class.
시간지연 제어기법을 이용한 능동 현가시스템에 관한 연구
현동길(Dong Ji Xuan),김진완(Jin wan kim),장경의(Jing Yi Zhang),김영배(Young Bae Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
This is Presents experimental results of a force tracking controller for a quarter-car suspension system. The active suspension system was decomposed into two loops. At the main loop, the desired force signal is calculate by using a standard LQ design process. The Time Delay Control(TDC) design technique is then used to design the force controller such that the desired force signal is achieved in a robust manner when actuator or other plant uncertainties are present. The ADAMS controls module was used to realize the joint simulation of ADAMS and MATLAB, of which the results showed that the TDC strategy is reasonable and feasible.