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Web Tension Estimation by Local Contact Force Measurement in Roll-to-Roll Manufacturing
Yiwei Jin,Jiankui Chen,Zhouping Yin 한국정밀공학회 2020 International Journal of Precision Engineering and Vol.21 No.11
Web tension and its distribution are key factors in the operation of web systems, the roll to roll (R2R) manufacturing of flexible electronics brings even higher requirements for it. To effectively get the web tension at any position on the R2R process line, a new web tension estimation method by measuring the local contact force is investigated in this paper, which can not only estimate the web tension, but also the web tension distribution. This study attempts to derive the approximate fitting formula between the local contact force and the web tension. Firstly, the schematic of web tension estimation method by local contact force measurement is presented; Then the mass spring model is used to derive the governing equations, which is discretized and solved by Improved Euler method. And approximate fitting formula of the local contact force with tension is derived based on the numerical results. Finally, to validate the fitting formula, the experiments are carried out to detect the local contact force and estimate both the web tension and its distribution.
Synthesis of Ag/TiO<sub>2</sub> Core/Shell Nanoparticles with Antibacterial Properties
Lin, Yue,Qiqiang, Wang,Xiaoming, Zhang,Zhouping, Wang,Wenshui, Xia,Yuming, Dong Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.8
Monodispersed Ag/$TiO_2$ core/shell nanoparticles were synthesized in solution via colloid-seeded deposition process using Ag nanoparticles as colloid seeds and $Ti(SO_4)_2$ as Ti-source respectively. Silver nitrate was reduced to Ag nanoparticles with $N_2H_4{\cdot}H_2O$ in the presence of CTAB as stabilizing agent. The titania sols hydrolyzed by the $Ti(SO_4)_2$ solution deposited on the surface of Ag nanoparticles to form the Ag/$TiO_2$ core/shell nanoparticles. Inductively coupled plasma atomic emission spectrometry (ICP-AES) showed low amount of Ag ion leaching from the Ag/$TiO_2$ core/shell nanoparticles. The Ag/$TiO_2$ core/shell nanoparticles indicated excellent antibacterial effects against Escherichia coli and maintained long-term antibacterial property.
Synthesis of Ag/TiO_2 Core/Shell Nanoparticles with Antibacterial Properties
Yue Lin,Wang Qiqiang,Zhang Xiaoming,Wang Zhouping,Xia Wenshui,Dong Yuming 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.8
Monodispersed Ag/TiO_2 core/shell nanoparticles were synthesized in solution via colloid-seeded deposition process using Ag nanoparticles as colloid seeds and Ti(SO_4)_2 as Ti-source respectively. Silver nitrate was reduced to Ag nanoparticles with N_2H_4·H_2O in the presence of CTAB as stabilizing agent. The titania sols hydrolyzed by the Ti(SO_4)_2 solution deposited on the surface of Ag nanoparticles to form the Ag/TiO_2 core/shell nanoparticles. Inductively coupled plasma atomic emission spectrometry (ICP-AES) showed low amount of Ag ion leaching from the Ag/TiO_2 core/shell nanoparticles. The Ag/TiO_2 core/shell nanoparticles indicated excellent antibacterial effects against Escherichia coli and maintained long-term antibacterial property.
Yue Lin,Wang Jing,Pan Kang,Zhang Xiaoming,Wang Zhouping,Xia Wenshui 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.4
Making use of chitosan (CS) and ethylenediaminetetraacetic acid (EDTA) as a reaction system, CS-EDTA nanoparticles were synthesized through a facile counterion complex coacervation method. Ag^+ could enter porous CS nanoparticles synthesized with this method, allowing Ag nanoparticles within chitosan nanoparticles were synthesized by reducing silver nitrate with chitosan. Because of the noncovalent interaction between CS and EDTA, the EDTA could be easily removed via dialysis against water, and pure core/shell-type Ag/CS nanoparticles could be obtained. The nanoparticles showed higher antibacterial activity toward E. coli than the active precursor Ag nanoparticles and CS.
Lin, Yue,Jing, Wang,Kang, Pan,Xiaoming, Zhang,Zhouping, Wang,Wenshui, Xia Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.4
Making use of chitosan (CS) and ethylenediaminetetraacetic acid (EDTA) as a reaction system, CS-EDTA nanoparticles were synthesized through a facile counterion complex coacervation method. $Ag^+$ could enter porous CS nanoparticles synthesized with this method, allowing Ag nanoparticles within chitosan nanoparticles were synthesized by reducing silver nitrate with chitosan. Because of the noncovalent interaction between CS and EDTA, the EDTA could be easily removed via dialysis against water, and pure core/shell-type Ag/CS nanoparticles could be obtained. The nanoparticles showed higher antibacterial activity toward E. coli than the active precursor Ag nanoparticles and CS.
Review in isothermal amplification technology in food microbiological detection
Xiang Li,Xiaolong Zhang,Xiaoli Shi,Hongfei Shi,Zhouping Wang,Chifang Peng 한국식품과학회 2022 Food Science and Biotechnology Vol.31 No.12
Food-borne diseases caused by microbial contamination have always been a matter of great concern to human beings. Hence, the research on these problems has never stopped. With the development of microorganism amplification technology, more and more detection methods have come into our vision. However, traditional detection technologies presents more or less drawbacks, such as complicated operation, low accuracy, low sensitivity, long-time detection, and so on. Therefore, more convenient, accurate, and sensitive measurement for the microorganism are needed. Isothermal amplification technology is one of the alternative approach containing the above mentioned advantages. This work mainly summarizes the principles of loop-mediated isothermal amplification (LAMP) and rolling circle amplification (RCA) which belong to isothermal amplification. Meanwhile, the application of LAMP and RCA in food microorganism detection is introduced.
Uniform Side Illumination Generated from LEDs Arranged by an Annealing Algorithm
Xu Wang,Panling Lei,Chaoyi Qian,Zhiping Wang,Xuefen Xu,Zhouping Su 한국광학회 2022 Current Optics and Photonics Vol.6 No.3
Given a cubic space, it is easy to uniformly illuminate the floor with light sources placed on top. However, little has been reported about uniform illumination on walls with the same configuration of light sources. Here we present a luminaire consisting of nine light-emitting diodes (LEDs) with perfect Lambertian distribution, placed on the top as a 3 × 3 rectangular LED array. The distances between LEDs and tilt angles of each individual LED are adjustable and optimized by an annealing algorithm. After optimization, the array produces a rectangular illumination pattern on one wall with a uniformity of about 89%. Analysis shows that the tilt angles of individual LEDs are key parameters for uniform side illumination. In a scenario that is more practical, the tilt angles of all the LEDs are set to be the same, only decreasing the uniformity to 83%.
The Lymphotoxin-α 252 A>G Polymorphism and Breast Cancer: A Meta-analysis
Zhou, Ping,Huang, Wei,Chu, Xing,Du, Liang-Feng,Li, Jian-Ping,Zhang, Chun Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.5
Objective: The aim of this meta-analysis is to evaluate associations between LTA-252 A>G and breast cancer (BC). Methods: Electronic searches of several databases were conducted for all online publications. A total of 7 studies involving 4,625 BC patients and 4,373 controls were identified. Results: This meta-analysis showed no significant association between the LTA-252 A>G polymorphism and BC in overall or Caucasian populations. However, a positive association was found limited to Asian populations. Conclusion: Although there was no significant association found between the LTA-252 A>G polymorphism and BC overall, a positive association was found in Asian populations.