摘要：
Research on the use of Near-infrared Spectroscopy for rapid predict oil fatty acid content, proposed a method based on fatty acid content to identify the oil species. Collect five kinds of 133 parts of edible oil data samples by Near-infrared spectroscopy. The original spectroscopy were pretreated by using standard normal variable variation and De-trending(SNV-DT), and using support vector machine regression (SVR) build quantitative models of fatty acids, using Support Vector Classification (SVC) to establish the type of oil qualitative model. Results show, Using palmitic acid, oleic acid, linoleic three kinds of fatty acids it is feasible. Three kinds of fatty acid quantitative model prediction set correlation coefficients were 95.0876%,99.8592% and 98.5951%. Quantitative - Qualitative model prediction accuracy rate of 100% set. Studies shows that Near-infrared spectroscopy can quickly predict oil fatty acid content, and discriminating oil species. This research has a strong practical and popularization value. In order to develop a kind of rapid method which predict fatty acid content and use it to identify the oil species to provide technical support.
摘要：
By modifying the accumulative roll-bonding (ARB) procedures, accumulative roll-bonding (ARB) processing up to 30 cycles (N) with a 50% thickness reduction per cycle (equivalent strain = 24) at room temperature was conducted on pure copper. The bonding condition, microhardness and electrical conductivity of the ARBed Cu were studied. Results showed that good bonding condition of the samples was achieved. As N increases, the microhardness of ARBed Cu increases, reaching ~2.9 times that of annealed Cu for N = 30. The electrical conductivity of ARBed Cu decreases slightly but with periodic fluctuations for N > 10, with a minimum of 90.4% IACS for N = 30. Our study indicated that ARB can be an effective way to produce high-hardness and high-conductivity pure copper better than or comparable to Cu alloys and Cu based composites as reported.
摘要：
Cu/C composites were prepared from Cu and graphite by accumulative roll-bonding (ARB) up to 30 cycles (N) with a 50% thickness reduction per cycle at room temperature. The microstructure and properties of the Cu/C composites were investigated. Results showed that ARB can remarkably decrease the size of graphite and improve the dispersion of graphite in the Cu matrix. Moreover, significant thickness reduction (down to ~ 5 graphene layers) of the graphite was found in the Cu/C composites fabricated by ARB. The microhardness of the Cu/C composites increases with increasing N and is ~ 3.3 times that of pure Cu for N = 30. The electrical conductivity of the Cu/C composites decreases slightly with increasing N, with a minimum of ~ 90% IACS for N = 30. Our study indicated that ARB can be an effective method for fabrication of Cu/C composites from Cu and graphite with a combination of hardness and electrical conductivity better than or as good as that of carbon nanotube or graphene reinforced Cu matrix composites as reported.
摘要：
TiAl3 and TiN composite nanoparticles were continuously synthesized from Ti–48Al master alloy by hydrogen plasma-metal reaction in a N2, H2 and Ar atmosphere. The phase, morphology, and size of the nanoparticles were studied by X-ray diffraction (XRD) and transmission electronic microscopy (TEM). X-ray photoelectron spectroscopy (XPS) and evolved gas analysis (EGA) were used to analyze the surface phase constitution and oxygen content of the nanoparticles. The as-synthesized nanopowders were mainly composed of nearly spherical TiAl3 and tetragonal TiN phases, with a mean diameter of ~42 nm and mass fractions of 49.1% and 24.3%, respectively. Passivation in the atmosphere of Ar and O2 for 24 h at room temperature led to the formation of amorphous Al2O3 shells on the TiAl3 particle surface, with a mean thickness of ~5.0 nm and a mass fraction of ~23.5%, as well as TiO2 with a mass fraction of ~3.2%.
摘要：
This paper analyzed fractional dimensions of two-dimensional Fractional Brownian Motion (FBM) and two-dimensional road irregularity and put forward a two-dimensional road generation algorithm based on wavelet transformation. And the data collected from the road were numerically reconstructed. The power spectrum estimation method was applied to compare the PSD of the simulated road with the theoretical value to test the feasibility of the two-dimensional road generation algorithm based on wavelet transformation.
作者机构：
[Jiaqing Jian; Guoquan Zhang; Hongwei Fang; Zhiming Yu] School of Mechanical Engineering, Wuhan polytechnic University;[Jiaqing Jian; Guoquan Zhang; Hongwei Fang; Zhiming Yu] Full Avic Hubei Ali-JiaTai Aircraft Equipment Co.,LTD
会议名称：
2015 2nd International Conference on Civil,Materials and Environmental Sciences(CMES 2015)
会议时间：
2015-03-14
会议地点：
London,UK
关键词：
conceptual design;project evaluation;riveting device;fuzzy set theory analysis unit
摘要：
In order to improve the automation of capacitor package, conceptual design and fuzzy theory is applied to establish evaluation system of the riveting device and evaluation index system of hierarchy an
