one of the conventional methods for temporary support of tunnels is to use steel sets with shotcrete. the nature of a temporary support system demands a quick installation of its structures. as a result, the spacing between steel sets is not a fixed amount and it can be considered as a random variable. hence, in the reliability analysis of these types of structures, the selection of an appropri...

   In This paper, the effect of size on melting temperature of metallic nanoparticles (Au, Pb and Bi) is theoretically simulated and explained. In this regard, the cause of difference in various experimental data is introduced, which is the difference between nanoparticles’ grain Gaussian distribution. This volume-depended model with the help of the Gaussian distribution can descri...

It is considered an improper integral that determines the high-frequency asymptotics of spectral energy distribution equilibrium radiation in ideal electron gas. has been established "high-frequency" limit this a power-law character, and its value proportional to density gas as function temperature chemical potential for arbitrary degeneracy electrons. Keywords: radiation, dis...

design, simulation and optimal selection of cosine-linear frequency modulation waveform (cnlfm) based on correlated ambiguity function (af) method for the purpose of synthetic aperture radar (sar) is done in this article. the selected optimum cnlfm waveform in contribution with other waveforms are applied directly into a sar image formation algorithm (ifa) and their quality effects performance ...

Frequency distribution of word usage in a word sequence generated by capping is estimated in terms of the number of "hits" in retrieval of web-pages, to evaluate structure of semantics proper not to a particular text but to a language. Especially we compare distribution of English sequences with Japanese ones and obtain that, for English and Japanese phonogram, frequency of word usage against r...

elastic energy of seismic wave is lost through propagation into the earth. various factors affect seismic energy. some of them are frequency independent and recovered in processing steps. but other factors such as intrinsic absorption of medium are frequency dependent and cannot be recovered by processing methods. lost energy caused by these factors is called attenuation. there are various meth...

The rotational frequency response function (RFRF) plays a crucial role in increasing the accuracy of calculated results frequency-based substructuring method. However, RFRFs are often omitted due to difficulties measurement process and limitations equipment. This paper presents scheme estimating FRF an irregular plate structure using FE model reduction expansion reduced was introduced improved ...

This paper mainly studies the order statistics of geometric distribution. The deduces joint frequency function and conditional statistics, and, obtain prove some important propositions Certain are different from also similar to corresponding exponential distribution.

W. R. Bauer Bayerische Julius-Maximilians-Universität Würzburg, Medizinische Universitätsklinik, Josef-schneider-Strasse 2, 97080 Würzburg, Germany Abstract We describe the NMR signal formation properties of a single vessel. Instead of assuming the frequency distribution to be a simple Lorentzian or Gaussian one, we take into account that the frequency distribution around the vessel is a comple...

The nature of the quantitative distribution of the 64 DNA codons in the human genome has been an issue of quantitative debate for over a decade. Some groups have proposed that the quantitative distribution of the DNA codons ordered as a rank-frequency plot follows a well-known power law called Zipf’s law. Others have shown that the DNA codon distribution is best fitted to an exponential functio...