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Online since: February 2013
Authors: Peng Fei Xu, Hong Bin Zhang, Xin Feng Wang, Zheng Yong Yu
A block SVD-based image compression scheme is demonstrated and the usage feasibility of Block SVD-based image compression is proved. 1 Introduction With the further increase of the information society, the increasing amount of information people need, digital images contain an increasingly large amount of data, how to make these large data transfer across the network quickly and easily to become a hot issue of concern, Image compression is one of the key technologies to solve this problem[1].
A further reduction on the singular values is subtracting the mean of the original image before performing the SVD.
Online since: July 2014
Authors: Dong Lai Xu, Jie Li
The data demonstrate that the incorporation of FSS into magnetic absorbing materials provides an effective solution to thin broadband EMW absorbers.
Fig. 2 Reflectivity versus frequency for the absorbers without FSS The data in Fig. 2 indicate that the absorption performance of sample 1 is evidently better than that of sample 2.
(3) In the case of the FSS1 positioned on top of the absorber, the absorption band is shifted to a higher frequency range with a significant reduction in the absorption.
Online since: December 2012
Authors: Lin Wei, Xiang Fei, Dong Fu
The reduction of CO2 emission became a global issue[1,2].
Data, 56 (2011) 2660-2663
Data, 51 (2006), 467-470
Online since: October 2012
Authors: P.P. Pradyumnan, T. Ramachandran, Nhalil E. Rajeevan
The indexing of the XRD pattern of the material was done in comparison with standard JCPDS data available (JCPDS 78-1969) which confirmed the cubic structure of the crystals.
The prominent peak indicated [311] planes, showing good agreement with the standard data, for the Co3O4 films grown by other methods.
In the presence of magnetic field the dielectric constant of the sample shows reduction which is supposed to enhance the figure of merit at higher temperatures.
Online since: September 2007
Authors: Manabu Enoki, Yun Ping Li
Introduction The demand of several industries such as automotive, aircraft and aerospace for a reduction of weight makes magnesium a material with high interest [1].
The value of 0ε is necessarily greater than the true strain ε .The nonlinear fit result by selecting appropriate value of β, 0ε and γ shows a good agreement with the experimental data as shown in Fig.2.
The calculated results from Eq.2 demonstrate a good agreement with the experimental data as shown in Fig.4, where the constant V is 10±2MPa/s and 20±3MPa/s for the parallel and vertical sample, respectively.
Online since: March 2009
Authors: Ali Shokuhfar, Mehrdad Vahdati
The input data to the software was adjusted as shown in table 1.
This pressure reduction at the end of rotor will help the air enter to this area and make the flow smoother.
Input data to the simulating software.
Online since: March 2007
Authors: Chwee Teck Lim, C.H. Sow, T. Yu, X.J. Xu, J.T.L. Thong, Y.W. Zhu
Scientists have developed many techniques to synthesize metal oxides nanostructures, such as ethylene glycol-mediated synthesis [2], carbonthermal reduction process [3], vapor-liquid-solid (VLS) process [4] and vapor-solid (VS) process [5].
Diffraction Data File, No. 33-0664, hematite (α-Fe2O3), International Centre for Diffraction Data
Online since: July 2014
Authors: Peng Zi Sun, Ye Ping Zhao, Xian Guo Han
The data acquisition software coded by Visual Basic was used for storage and display of carding force.
The tested data of carding force processed by wavelet were divided into high frequency part, which was filtered out, and low frequency part, which was kept for calculating the maximum and average carding force from the first to 20th flats, shown in Fig. 2 to Fig. 7.
Flat speed increase is conducive to each flat load reduction.
Online since: September 2013
Authors: Xiao Qiang Liu, Yan Hua Yang, Hong Qian Zhang
On account of this, this article analyzes data about coming water of Yichang and Hankou Stations to support characteristics of new flow of Yichang-Wuhan Reach after impoundment of the Three Gorges with Mann-Kendall nonparametric rank test method.
In Mann-Kendall test, time series data under null hypothesis (x1,…,xn ) are sample of n independent and random variables and distribution; alternative hypothesis is two-sided test and its distribution to all k, jn, and k≠j, xk and xj is different.
Analysis on Variation Trend and Abrupt Change of River Runoff in Yichang Station It can be seen from Fig.1 that calculation results of annul river runoff in Yichang Station that annual river runoff of Yichang Station tended to decreases as a whole from 1950 to 2008, transitory remarkable reduction trend turned up from 1960 to 1962 and in 1979 and variation tendency of other years is slight.
Online since: March 2012
Authors: Qi Lin Mei, Yan Qin, Zhi Xiong Huang, Shi Wei Zhao, Bi Fang Dai
Therefore, studying new damping materials is very important to vibration suppression and noise reduction.
Because the impact force during DSAP vibration beam test will affect the result of the test, the result is different from the data obtained in DMA test, but the two sets of data curve trend from the test and DMA are consistent.
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