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Yanyi Zhang,Feng Feng,Huang Rongxia,Kai Shi,Shaozhu Xiao,WeiWu,Timing Qu,Xiaohao Wang,Zhenghe Han 한국물리학회 2014 Current Applied Physics Vol.14 No.3
Cerium dioxide (CeO2) films were fabricated on yttria-stabilized zirconia (YSZ) single crystals using unbalanced radio frequency (RF) magnetron sputtering. X-ray diffraction measurements revealed film strain discrepancies under different deposition parameters. Strain evolution was induced by varying sputtering pressure, RF power, and sputtering gas. A distinct morphological transition from a granular surface to an interwoven surface was also realized by varying the above parameters. On the basis of the “atomic peening” mechanism, the influence of different parameters on film strainwas discussed. The film surface characteristics were revealed to be highly correlated with film strain. YBa2Cu3O7d (YBCO) films were post-deposited on the as-grown CeO2/YSZ(001) stack by using the trifluoroacetate metal-organic deposition (TFA-MOD) method. The superconducting property of the YBCO layer varied significantly with the morphology of the CeO2 buffer films.
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Development of Data Monitoring Based on Virtual Instrument
Yanyi Xu,Yongshun Zhang 보안공학연구지원센터 2016 International Journal of Smart Home Vol.10 No.4
The objective of this work is the design and development of the Data Acquisition based on Virtual Instrument and Storage parts of a data monitoring that will be used for a certain control and guide equipment for electronic equipment. The data captured and stored in a database will be an application that will diagnose failure of control and guide equipment. Data acquisition and data Store were developed using finite-state machine model and Virtual Instrument. This paper focuses in the description of the Data Acquisition. The data monitoring is currently installed and applied on a certain control and guide equipment.
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Liu, Dawei,Liu, Yanyi,Garcia, Betzaida Batalla,Zhang, Qifeng,Pan, Anqiang,Jeong, Yoon-Ha,Cao, Guozhong The Royal Society of Chemistry 2009 Journal of materials chemistry Vol.19 No.46
<p>V<SUB>2</SUB>O<SUB>5</SUB> xerogel films were fabricated by casting V<SUB>2</SUB>O<SUB>5</SUB> sols onto FTO glass substrates and annealing at 300 °C for 3 hours in nitrogen and air. The films annealed in nitrogen and air possessed different grain size and crystallinity. Optical absorption measurements and electrochemical impedance analyses revealed a reduced optical bandgap and enhanced electrical conductivity of N<SUB>2</SUB> annealed V<SUB>2</SUB>O<SUB>5</SUB> film. Lithium ion intercalation measurements showed that at a charge/discharge current density of 600 mAg<SUP>−1</SUP>, the N<SUB>2</SUB> annealed sample possessed noticeably better lithium ion storage capability. In contrast to the air annealed sample, which started with a discharge capacity of 152 mAhg<SUP>−1</SUP> but after 50 cycles the capacity had decreased to a low value of only 44 mAhg<SUP>−1</SUP>, the N<SUB>2</SUB> annealed sample started with a low value of 68 mAhg<SUP>−1</SUP> but the capacity increased sharply to a high value of 158 mAhg<SUP>−1</SUP> at the 24<SUP>th</SUP> cycle, followed by little capacity degradation in later cycles and after 50 cycles, the discharge capacity was still as high as 148 mAhg<SUP>−1</SUP>. Much improved lithium ion intercalation capacity and cyclic stability could be attributed to surface defects V<SUP>4+</SUP> and/or V<SUP>3+</SUP> and associated oxygen vacancies introduced by N<SUB>2</SUB> annealing as well as much less crystallized vanadium oxide.</p> <P>Graphic Abstract</P><P>V<SUB>2</SUB>O<SUB>5</SUB> films annealed in N<SUB>2</SUB> exhibited a much improved lithium ion intercalation capability as compared to counterparts annealed in air, highly favoring potential application as lithium ion battery electrodes. <img src='http://pubs.rsc.org/ej/JM/2009/b914436f/b914436f-ga.gif'> </P>
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( Changcheng Wu ),( Hao Zhang ),( Jiafeng Hua ),( Sha Hua ),( Yanyi Zhang ),( Xiaoming Lu ),( Yichen Tang ) 한국인터넷정보학회 2019 KSII Transactions on Internet and Information Syst Vol.13 No.12
Recognizing license plate from its traffic camera captured images is one of the most important aspects in many traffic management systems. Despite many sophisticated license plate recognition related algorithms available online, license plate recognition is still a hot research issue because license plates in each country all round the world lack of uniform format and their camera captured images are often affected by multiple adverse factors, such as low resolution, poor illumination effects, installation problem etc. A novel method is proposed in this paper to solve the inclination problem of license plates in their camera captured images through four parts: Firstly, special edge pixels of license plate are chosen to represent main information of license plates. Secondly, least square methods are used to compute the inclined angle of license plates. Then, coordinate rotation methods are used to rotate the license plate. At last, bilinear interpolation methods are used to improve the performance of license plate rotation. Several experimental results demonstrated that our proposed method can solve the inclination problem about license plate in visual aspect and can improve the recognition rate when used as the image preprocessing method.
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Haiyan Wang,Chen Yu,Wanghui Xu,Yupeng Zhang,Yanyi Ma,Yan Lin 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.12
An experimental study is performed on the microstructure transformation induced by rapid laser welding in the differentregions of Zr61.4Cu27.8Al4Ni6Y0.8bulk metallic glass (BMG). The laser input energy has a remarkable influence on themicrostructure and microhardness of the Zr-based BMGs. The microstructures in different regions of as-welded joints arediverse. Crystallization happens in heat-affected zone (HAZ) with crystalline dendritic phase of CuZr, which results in thedeterioration of the microhardness to 434.9 ± 17.1 HV in HAZ, much lower than that of parent material as 517 ± 5.0 HV. Meanwhile, the element profiles indicate that intragranular segregation of Cu element occurs during the crystallization process. In the center of molten zone (MZ), the structure is fully amorphous and its hardness is close to that of parent material. In the region transiting from MZ to HAZ, some nano-grains with an average size of 20–50 nm are identified. In addition,several flower-like nanostructured grains of Y2O3phase with a size ranging from 50 to 80 nm are formed in MZ’s matrix. The nanocrystallization is believed to be responsible for the enhancement of the Vickers hardness up to 560.1 ± 8.4 HV inthis region.
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