نتایج جستجو برای: capacity spectrum method

تعداد نتایج: 2063409  

Journal: :international journal of nanoscience and nanotechnology 2014
h. tashakori b. khoshnevisan f. kanjouri z. s. naghavi

in this paper, we have used density functional perturbation theory (dfpt) and pseudo-potential method to calculate the phonon spectrum, phonon density of states (dos), specific heat capacity and mechanical properties of (5,5) armchair and (9,0) zigzag single wall carbon nanotubes (swcnts). our calculations show that young’s modulusfor (5,5) and (9,0) nanotubesare higher than 1tpa. we have also ...

B. Khoshnevisan F. Kanjouri H. Tashakori Z. S. Naghavi

In this paper, we have used density functional perturbation theory (DFPT) and Pseudo-potential method to calculate the phonon spectrum, phonon density of states (DOS), specific heat capacity and mechanical properties of (5,5) armchair and (9,0) zigzag Single Wall Carbon Nanotubes (SWCNTs). Our calculations show that Young’s modulusfor (5,5) and (9,0) nanotubesare higher than 1TPa. We have also ...

2009
Anil K. Chopra Rakesh K. Goel

An improved capacity-demand-diagram method that uses the well-known constantductility design spectrum for the demand diagram is developed and illustrated by examples. This method estimates the deformation of inelastic SDF systems consistent with the selected inelastic design spectrum, while retaining the attraction of graphical implementation of the ATC-40 Nonlinear Static Procedure.

Journal: :isecure, the isc international journal of information security 0
n. zarmehi electrical engineering department, sharif university of technology, tehran, iran advanced communications research institute, sharif university of technology, tehran, iran m. r. aref electrical engineering department, sharif university of technology, tehran, iran information systems and security lab. (issl), electrical engineering department, sharif university of technology, tehran, iran

this paper investigates the multiplicative spread spectrum watermarking method for the image. the information bit is spreaded into middle-frequency discrete cosine transform (dct) coefficients of each block of an image using a generated pseudo-random sequence. unlike the conventional signal modeling, we suppose that both signal and noise are distributed with laplacian distribution, because the ...

2016
Prakash S Darji Shilpa Rana

---------------------------------------------------------------------***--------------------------------------------------------------------Abstract Here, in this paper spectrum sensing method is proposed for full duplex cognitive radio. Spectrum sensing performs essential part in spectrum allocation. Cognitive radio is the very useful option now a days, as the traffic of user increase and less...

2008
Kaibin Huang Vincent K. N. Lau Yan Chen Bin Chen Xia Yang

In practice, radio spectrums allocated to cellular networks are usually underutilized. To increase the spectrum usage efficiency, we studied spectrum sharing between a cellular uplink and a mobile ad hoc networks. These networks use either all uplink frequency sub-channels or their disjoint sub-sets, called spectrum underlay and spectrum overlay, respectively. Given these methods, the capacity ...

2015
Alok Madan Ashok Gupta Arshad K. Hashmi

Non-linear dynamic time history analysis is considered as the most advanced and comprehensive analytical method for evaluating the seismic response and performance of multi-degree-of-freedom building structures under the influence of earthquake ground motions. However, effective and accurate application of the method requires the implementation of advanced hysteretic constitutive models of the ...

2004
Robert Pierce

Code Division Multiple Access (CDMA) is probably the most interesting multiple access method provided by spread spectrum technology. CDMA refers to a multiple access method in which the individual terminals use spreadspectrum techniques and occupy the entire spectrum whenever they transmit. This paper focuses on direct-sequence spread-spectrum principles (processing gain, spreading, de-spreadin...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید