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11 results on '"Tang, Darong"'

2. Automatic Text Classification for Label Imputation of Medical Diagnosis Notes Based on Random Forest

Author

Yang, Bokai, Dai, Guangzhe, Yang, Yujie, Tang, Darong, Li, Qi, Lin, Denan, Zheng, Jing, Cai, Yunpeng, Hutchison, David, Series Editor, Kanade, Takeo, Series Editor, Kittler, Josef, Series Editor, Kleinberg, Jon M., Series Editor, Mattern, Friedemann, Series Editor, Mitchell, John C., Series Editor, Naor, Moni, Series Editor, Pandu Rangan, C., Series Editor, Steffen, Bernhard, Series Editor, Terzopoulos, Demetri, Series Editor, Tygar, Doug, Series Editor, Weikum, Gerhard, Series Editor, Siuly, Siuly, editor, Lee, Ickjai, editor, Huang, Zhisheng, editor, Zhou, Rui, editor, Wang, Hua, editor, and Xiang, Wei, editor

Published
2018
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6. Effect of nanocellulose fiber hornification on water fraction characteristics and hydroxyl accessibility during dehydration

Author

Tang Darong, Qijun Ding, Jinsong Zeng, Kefu Chen, Wenhua Gao, and Bin Wang

Subjects
Polymers and Plastics, Static Electricity, Nanofibers, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Nanocellulose, chemistry.chemical_compound, Differential scanning calorimetry, Microscopy, Materials Chemistry, medicine, Bound water, Colloids, Dehydration, Fiber, Desiccation, Cellulose, Chemistry, Organic Chemistry, Water, Hydrogen Bonding, Pinus, 021001 nanoscience & nanotechnology, medicine.disease, 0104 chemical sciences, Cellulose fiber, Chemical engineering, Nanoparticles, 0210 nano-technology
Abstract

Hornification are usually occurred in cellulosic fibers and even in nanocellulose fibrils during dehydration process but their mesoscopic structural changes is not fully understood. Here we investigated the structural features of cellulose nanocrystals (CNCs) and cellulose nanofibrils (CNF) with different solid content. In order to avoid the effect of drying, liquid AFM mode was carried out in this work. The different water contents of nanocellulose were quantified by Differential Scanning Calorimetry (DSC). We showed evidence of extreme growth in radial direction in the redispersed nanocelluloses, analyzed by statistics of contours from microscopy images. The amount of free water, freezing bound water, and non-freezing bound water decreased gradually during water evaporation and were completely removed in sequence. In addition, the hydroxyl accessibility of both redispersed CNCs and CNF were reduced by 83.33% and 81.96% via evaluating the uptake of fluorescent dyes.

Published
2019

7. Effect of retention rate of fluorescent cellulose nanofibrils on paper properties and structure

Author

Qijun Ding, Jinsong Zeng, Bin Wang, Jun Xu, Zhe Yuan, Tang Darong, Kefu Chen, and Wenhua Gao

Subjects
Flocculation, Materials science, Polymers and Plastics, Scanning electron microscope, Nanofibers, 02 engineering and technology, Confocal scanning microscopy, 01 natural sciences, chemistry.chemical_compound, Tensile Strength, Ultimate tensile strength, Materials Chemistry, Cellulose, 010405 organic chemistry, Rhodamines, Organic Chemistry, 021001 nanoscience & nanotechnology, Fluorescence, 0104 chemical sciences, chemistry, Chemical engineering, Elemental analysis, Nanofiber, Microscopy, Electron, Scanning, 0210 nano-technology
Abstract

In this work, we report a new characterization method using fluorescent cellulose nanofibrils to analyze retention and loss rates in the papermaking process. Cellulose nanofibrils (CNF) were isolated from chemical pulp by enzymatic pretreatment and used as a strengthening additive in sheet forming. The aim of this paper was to investigate its effects on flocculation, retention and loss rate and the physical and mechanical properties. CNF was subjected to fluorescent labeling with RBITC (Rhodamine B isothiocyanate), and the retention of fluorescent cellulose nanofibrils (FCNF) was analyzed by elemental analysis and fluorescence intensity. The retention and loss rate of the FCNF decreased with increasing the addition of FCNF. Laser Confocal Scanning Microscopy (LCSM) and Scanning Electron Microscope (SEM) images confirmed that FCNF can be evenly distributed in the paper. A thorough investigation of the relation between the retention rate and papersheet performance was conducted.

Published
2017

10. PIV Measurements of Gas Flow Fields from Burning End

Author

Zeng Jingsong, Junzhang Wu, Yifei Huang, Du Liang, and Tang Darong

Subjects
Materials science, 020401 chemical engineering, Flow (mathematics), 0103 physical sciences, 02 engineering and technology, Mechanics, 0204 chemical engineering, 01 natural sciences, 010305 fluids & plasmas
Published
2017

11. Efficiency model of pumping low viscosity fluids

Author

Tang Darong, Z Y Wang, John Lumkes, Y J Liu, and W Wang

Subjects
Engineering, Control theory, business.industry, Test rig, Resistance coefficient, Mechanics, business, Leakage (electronics)
Abstract

This paper introduces the current research situation of pump efficiency, especially in pumping low viscosity fluids. Then we propose a simple and widely used efficiency model for the pump which just depends on the suction, discharge and leakage resistance coefficient. An experimental test rig is setup. After evaluating the efficiency of the pump in different conditions, it is found that the performance is quite different when pumping different medium. A phenomenon has been observed which results of the appearance of the BEP (best efficiency point), and our efficiency model can explain these testing phenomena very well.

Published
2013

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