Báo cáo hóa học: " Influence of Surface Modified MWCNTs on the Mechanical, Electrical and Thermal Properties of Polyimide Nanocomposites" ppt

... of MWCNT in case of former and with 5 wt% in case of the latter. Electrical Properties One unique property of the MWCNTs is their electrical conductivity because of their large aspect ratio and mobile ... to longer chains of amine groups present on the surface of the tubes. The longer alkyl chains provide more repulsion between the individual MWCNT, h...

Ngày tải lên: 22/06/2014, 01:20

... results show that the approximation has little influence on conver- gence speed and estimation accuracy. Therefore, the approx- imation is a reasonable step in developing the adaptive mod- ified Newton algorithm. We ... eigendecomposition problem is reinterpreted as an unconstrained nonlinear opti- mization problem. Starting from the proposed cost function and making use of an...

Ngày tải lên: 22/06/2014, 20:20

... applications [13–16]. To date, there are many experimental and theoretical studies on the influence of GaAs substrate orientation on the QDs. However, the formation and evolution of QDs on misoriented substrates ... strain relaxation inside the QD, E surface is the surface energy associated with increased surface area of the QD, and E edge is the energy...

Ngày tải lên: 22/06/2014, 19:20

... interactions between the band elec- trons and the localized d electrons of the Co 2? ions substituting host ions and is consistent with the reported results [41], giving an additional evidence of cobalt substitution. Figure ... cobalt concentration samples ([0.05 M) have more distortion of the tetrahedral coordi- nation of Co 2? and indirect band gap absorption. Conclu...

Ngày tải lên: 22/06/2014, 00:20

... calcu- lated spontaneous polarization of 0.29 C/m 2 is less than the theoretical value of 0.81 C/m 2 of ground state PTO, but slightly larger than the value of 0.28 C/m 2 of tetragonal BTO (the other theoretical ... by the conclusion of uniaxial tensile stress dependency of elastic constant c 33 (see Fig. 2b). Note that the polarization under uniaxial stress remains alo...

Ngày tải lên: 22/06/2014, 00:20

... for the methanol decompo- sition and aldolization reaction between acetone and methanol [2–4]. However, the influence of the nature of the active sites (the surface basicity of the oxide) on the ... result of the modification of the nanostructure and the basic sites of the particles. Another phenomenon starts to occur on the surface of doped...

Ngày tải lên: 22/06/2014, 01:20

... effect of individual particles and the second power term is the contribution of particle–particle interaction. Another definitive equation for determining the modulus of a composite that contains spherical ... v 1 is the polymer–solvent interaction parameter, V, the molar volume of the solvent, and t r , the volume fraction of the rubber in the swollen gel. t r...

Ngày tải lên: 22/06/2014, 01:20

... well as for their applications in nano-devices [18]. The success of nano- devices similarly trusts on the ability of controlling the transport and electrical properties of the semiconduc- tors, ... func- tions, and diverse applications [14-17]. 1D materials have received great attention because of their much potential for fundamental studies of the roles of dim...

Ngày tải lên: 20/06/2014, 22:20

... direction on the Bayer pattern. In the conventional SSC-based methods, the smoothness of the Bayer color difference along an edge is examined, and the derivative of the differences along the hor- izontal ... focus on the local similarity of the Bayer color difference plane not only along the directional axis but also beside the axis within the local region. Si...

Ngày tải lên: 21/06/2014, 08:20

... V l is the variance of the lth corresponding filter channel, l is the filter number index, L is the number of filters, and E l is the energy vector of the lth filter channel. Visual representation of the ... the potential beginning of the music segment and, at the same time, the measurement of segment duration begins. The algorithm then waits for the trans...

Ngày tải lên: 21/06/2014, 19:20