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Urunchi, China

Zuo H.,Northeastern University China | Zuo H.,Xinjiang Joinworld Co. | Liu C.-M.,Northeastern University China
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | Year: 2012

The influences of the Zn content on the corrosion structure as well as the specific capacitance of the aluminum anode foils used in high voltage electrolytic capacitors were investigated. The cube texture of the foils was characterized by X-ray diffractometer (XRD) quantitatively and the distribution of Zn in the foils was measured by secondary ion mass spectrometer (SIMS). The corrosion structure of the etched foils was characterized by scanning electron microscope (SEM). The results show that when the Zn content of the foils varies from 1.9×10-6 (mass fraction) to 2.0×10-5, the cubic texture maintains at 95% (volume fraction), the surface segregation of Zn significantly increases, the corrosion structure becomes more homogeneous and the specific capacitance of the anode foils measured at 520 V increases from 0.666 μF/cm2 to 0.689 μF/cm2. Source

Ning H.,University of Science and Technology Beijing | Ning H.,Xinjiang Joinworld Co. | Zheng X.F.,University of Science and Technology Beijing
Applied Mechanics and Materials | Year: 2013

RFID belongs to the basic input device in the IOT(Internet of Things) applications. The country has attached much importance to the technique and application of IOT, and RFID has been widely used in logistics, warehousing, traffic, cattle raising and some other industries. The thesis employs MFRC531 chip and Atmel 89C518 bit microprocessors to design and realize a RFID card reader which can be characterized by simple circuits, easy to realize and convenient to debug. Thus, it may be referred by IOT technicians. © (2013) Trans Tech Publications, Switzerland. Source

Wei B.,Xinjiang Joinworld Co. | Xiao T.,Sun Yat Sen University | Li X.,Sun Yat Sen University | Wang Y.,Sun Yat Sen University | Wu P.,Shantou University
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | Year: 2012

The multi-walled carbon nanotubes (MWCNTs) were functionalized to produce oxidized MWCNTs (MWCNTs-COOH) and epoxidized MWCNTs (MWCNTs-Epon828). Three types of Graphene-MWCNTs/EP composites were prepared by adding the graphene sheets and different types of MWCNTs into the epoxy resin (EP), respectively. By means of tensile test and thermal gravimetric analysis, the synergetic effects of graphene and MWCNTs, the effects of their content and the methods of MWCNT functionalization on the mechanical and thermal properties of the composites were studied. The results indicate that the synergetic reinforcement of the graphene and MWCNTs has a better performance than that of sole MWCNTs. Even with 0.1% mass fraction of the graphene and MWCNTs, the tensile strength of Graphene-MWCNTs-Epon828/EP composite approaches the ultimate value: The tensile strength, elastic modulus, and the elongation at break have been increased by 35%, 65% and 34%, compared with the pure EP, respectively. The thermal stability of all the Graphene-MWCNTs/EP composites are improved with the addition of graphene and MWCNTs. Source

Liang X.-P.,Central South University | Li H.-Z.,Central South University | Huang L.,Central South University | Hong T.,Xinjiang Joinworld Co. | And 2 more authors.
Transactions of Nonferrous Metals Society of China (English Edition) | Year: 2012

Target made of 2519-T87 aluminum alloy was obliquely impacted by a projectile. Microstructural evolution around the crater was investigated by optical microscopy (OM), transmission electron microscopy (TEM), and electron backscattered diffraction (EBSD). The micro-hardness distribution near the crater after impact was studied. The results indicate that at the entering stage, the amount of adiabatic shear band (ASB) is the most, and the precipitates are as fine as those of the target material; the micro-hardness is higher than that at the other stages. At the stable-running stage, the amount of ASB reduces as the micro-bands increase; the precipitates tend to coarsen, which leads to the decrease of the micro-hardness. At the leaving stage, there is a large amount of micro-bands; the precipitates are refined, and the micro-hardness is higher than that at the stable-running stage. The difference in the micro-hardness of the impact stages is due to work hardening and precipitate coarsening, which is caused by adiabatic temperature rise in the alloy. © 2012 The Nonferrous Metals Society of China. Source

Ning H.,University of Science and Technology Beijing | Ning H.,Xinjiang Joinworld Co. | Zheng X.,University of Science and Technology Beijing
International Review on Computers and Software | Year: 2012

This document specifies the Transport Layer Security supported MECC algorithm for the internet of Things. The protocol provides communications security over the Internet. The protocol allows client/server applications to communicate in a way that is designed to prevent eavesdropping, tampering, or message forgery. This paper introduced application situation of RSA (Rivest, Shamir and Adleman) algorithm and MECC (Modified Elliptic curve cryptography) algorithm, and modified the security protocol and supported the MECC algorithm, at last, proposed a security protocol at transport layer supported MECC algorithm. According to the security protocol (RFC4346 TLS1.1) and application demands, this paper added authentication mode and key exchange about MECC, and abolished the DH key negotiation, and modified the definition of key suite. © 2012 Praise Worthy Prize S.r.l. - All rights reserved. Source

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