There are many modulation methods suitable for optical wireless communication. OOK, PPM are adopted widely in optical wireless communication for its high average-power-efficiency. DPPM, DPIM and DH-PIM are three new modulation methods for optical wireless communication, which may be the substitutes of PPM because of their better performance in power efficiency and bandwidth efficiency. In this ...

Cosmographic approach, a Taylor expansion of the Hubble function, has been used as model-independent method to investigate evolution universe in presence cosmological data. Apart from possible technical problems like radius convergence, there is an ongoing debates about tensions appear when one investigates some high redshift In this work, we consider two common data sets namely SNIa (Pantheon ...

the momentum equation in the kinematic wave model is a power-law equation with two parameters. these parameters, which relate the discharge to the flow area, are commonly derived using manning’s equation. in general, the values of these parameters depend on the flow depth except for some special cross sections. in this paper, improved estimates of the kinematic wave parameters for circular chan...

This paper presents a new methodology to estimate harmonic sources in a distribution network, based on measurements of limited number of given buses. The algorithm utilizes independent component analysis (ICA), a method of solving blind source separation theory. In this method, pseudo impedance matrix of distribution network is estimated. The location of harmonic sources will be identified by e...

We present a new approach for analyzing local power law processes and apply it to temperature measurements from the upper atmosphere. We segment the data and use the wavelet scale spectrum to estimate the parameters of the power law, the scale factor and the exponent. These parameters vary from segment to segment. Part of this variation is due to the non-stationarity of the data. Another part i...

We read the paper by Seki et al. [1] with great interest. It focuses its attention that aging, obesity, erythrocytosis, leukocytosis and dyslipidemia can be related to hemorheological disorders based on the blood chemistry results of 176 healthy volunteers. Although we have the data of large population trials, the role of hemorheological parameters and their possible relation to age is still un...