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Ying Dan Liu,김민수,최형진,유천열 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.61 No.9
Magnetorheological (MR) fluid is a smart magnetic particle suspension with the ability of being transformed from a liquid-like to a solid-like state by the stimuli of magnetic field. However, in the absence of magnetic field, dispersed magnetic particles of high density are apt to settle, resulting in poor dispersion stability. In this study, we introduced an aqueous poly(ethylene oxide) (PEO) solution with controlled shear viscosity as a medium fluid for carbonyl iron based MR fluid. Its rheological and dispersion properties were studied by varying molecular weight of the PEO. Field dependence of its MR properties was observed by a rotational rheometer with the attached MR device.
Ying Lei,Longfei Wang,Lanxin Lu,Dan-dan Xia 국제구조공학회 2017 Structural Engineering and Mechanics, An Int'l Jou Vol.63 No.6
Recently, some integrated structural identification/damage detection and reliability evaluation of structures with uncertainties have been proposed. However, these techniques are applicable for off-line synthesis of structural identification and reliability evaluation. In this paper, based on the recursive formulation of the extended Kalman filter, an on-line integration of structural identification/damage detection and reliability evaluation of stochastic building structures is investigated. Structural limit state is expanded by the Taylor series in terms of uncertain variables to obtain the probability density function (PDF). Both structural component reliability with only one limit state function and system reliability with multi-limit state functions are studied. Then, it is extended to adopt the recent extended Kalman filter with unknown input (EKF-UI) proposed by the authors for on-line integration of structural identification/damage detection and structural reliability evaluation of stochastic building structures subject to unknown excitations. Numerical examples are used to demonstrate the proposed method. The evaluated results of structural component reliability and structural system reliability are compared with those by the Monte Carlo simulation to validate the performances of the proposed method
Polymeric Colloidal Magnetic Composite Microspheres and Their Magneto-Responsive Characteristics
Ying Dan Liu,최형진,홍성해 한국고분자학회 2012 Macromolecular Research Vol.20 No.12
This feature article reviews recent research on the fabrication of magnetic polymeric composite particles as well as their special applications as magnetorheological (MR) fluids. MR materials are a class of smart particles that can form chain-like structures when dispersed in a non-magnetic medium under an applied magnetic field. A range of methodologies for their fabrication, such as in situ polymerization and solvent casting, have been introduced to prepare micron-sized magnetic composite particles with polymers followed by a demonstration of their corresponding morphologies as well as their magnetic and MR properties. Both the magnetic properties of the particle and the MR performance of the MR fluid are strongly influenced by the incorporation of polymers including the synthesis method and mass ratio.
Ying Dan Liu,Fei Fei Fang,최형진 한국공업화학회 2010 Journal of Industrial and Engineering Chemistry Vol.16 No.4
We comment on the recently published dielectric properties of titanate nanotubes (TNTs)- and titania nanoparticles (P25)-based electrorheological (ER) fluids in this note aiming to make a better understanding of their ER performance. Based on our Cole–Cole model plot, it is found that we can fit the dielectric spectra (dielectric constant/dielectric loss vs. frequency) of two ER fluids well with a better explanation of their polarizability by differentiating their ER performance.
Dan-dan Sun,Xu Gu,Jun-guo Li,Ting Yao,Ying-chao Dong 아세아·태평양축산학회 2015 Animal Bioscience Vol.28 No.5
The objective of this study was to evaluate the quality of five commercial enzyme linked immunosorbent assay (ELISA) kits (A, B, C, D, and E) from different suppliers for detecting aflatoxin B1 (AFB1). AFB1-free corn samples supplemented with different levels of AFB1 (5, 10, and 20 μg/kg) were used as positive controls and 6 replicates of each control sample were tested to evaluate the accuracy and precision of these kits. In addition, we also evaluated the performance of these ELISA kits for AFB1 in 30 feed samples, including corn, distillers dried grains with soluble, wheat samples, soybean meal, and poultry feed, which were verified by high performance liquid chromatography. Results showed that the coefficients of variation ranged from 1.18% to 16.22% in intra-plate and 2.85% to 18.04% in inter-plate for the determination of AFB1. The half maximal inhibitory concentration for five kits ranged from 3.72 to 7.22 μg/kg. The quantitation limits of AFB1 were all under the legal limit in China but somewhat inconsistent with kit instructions. Although the recovery rate of four of the five kits were either less than 90% or more than 110%, all these values were acceptable in practice. Two kits had high false positive rates (C and E). In conclusion, our results revealed that the qualities of five tested ELISA kits were significantly different.
A study on submerged rotating MBR for wastewater treatment and membrane cleaning
Dan-Ying Zuo,Hong-Jun Li,Hong-Tao Liu,Gui-Ping Wu 한국화학공학회 2010 Korean Journal of Chemical Engineering Vol.27 No.3
A submerged rotating membrane bioreactor (SRMBR), with a rotatable, rounded, flat-sheet Poly(vinyldiene fluoride) (PVDF) membrane module fixed on hollow axes and moved by an electromotor, was used for wastewater reclamation. It was found that the effluent COD became stable and lower than 20 mg/L after one day running. The equilibrium permeate flux increased from 42.5 to 47.5 L/m2·h with the rotation speed increasing from 15 r/min to 25 r/min. Prolonging relaxation time could alleviate membrane fouling and enhance the flux. Finally, membrane cleaning was studied. The results showed that flushing the membrane surface with water, water/NaOH and water/NaOH/HCl recovered permeate flux to 48.4%, 83.5% and 90.2% of that of the initial operation, respectively.
Novel electrorheological properties of a metal–organic framework Cu<sub>3</sub>(BTC)<sub>2</sub>
Liu, Ying Dan,Kim, Jun,Ahn, Wha-Seung,Choi, Hyoung Jin The Royal Society of Chemistry 2012 Chemical communications Vol.48 No.45
<P>A metal–organic framework, Cu<SUB>3</SUB>(BTC)<SUB>2</SUB>, was synthesized and applied as an electro-responsive electrorheological material dispersed in insulating oil. Powder of crystalline Cu<SUB>3</SUB>(BTC)<SUB>2</SUB> exhibited excellent chain-like structures and controllable rheological properties in an applied electric field.</P> <P>Graphic Abstract</P><P>A metal–organic framework, Cu<SUB>3</SUB>(BTC)<SUB>2</SUB>, was synthesized and applied as an electro-responsive electrorheological material dispersed in insulating oil. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2cc30367a'> </P>
Influence of Chinese Cultural Values on Service Quality Dimensions
Miss Ying Ying Liao,Dr. Ebrahim Soltani,Dr. Dan Alex Petrovici 세계문화관광학회 2010 Conference Proceedings Vol.11 No.0
The aim of this study is to explore the influence of Chinese cultural values on service expectations and service determinants from customer perspective. The study utilised an extensive survey-based quantitative methodology and collected 524 questionnaires from two different types of customer across three regions of northern, middle, and southern Taiwan: the five star chain hotel restaurants and the local chain restaurants. The findings are categorised into two structural models. Overall, the findings suggest that academics and practicing managers need to move beyond the Hofstede paradigm if today‘s borderless and wireless cross-cultural management has a chance to be understood and theorized.