This paper presents a novel mixed source localization algorithm based on high-order cumulant (HOC) and oblique projection techniques. To address the issue of lower accuracy in near-field (NFS) compared to far-field (FFS) localization, presented further enhances NFS localization. First, FFS’s direction-of-arrival (DOA) estimate is acquired utilizing multiple signal classification (MUSIC) spectra...

The aim objective of this study is to investigate the effects of near-field earthquakes on the response of mid-rise buildings with tubular structure.  For this purpose, a 20-story building with a square plan of six by six bays, all with 6 m span, and story height of 3.70 m is considered.  Axial force of columns, shear lag, and inter-story drift values are used as the main response parameters. N...

Offshore structures such as jacket platforms have to inevitably be designed against  sever  environmental actions. In seismically active areas these structures also become susceptible to earthquake excitations. Strong ground motions recorded  in recent earthquakes, including the 1995 Kobe, Japan, 1999 Chi-chi, Taiwan and 1999 Kocaeli, Turkey earthquakes, revealed that the dynamic motions in nea...

Moment-resisting frames have extensive usage in earthquake-prone areas and high ability in energy dissipation.After the earthquake in Northridge 1994,Kobe 1995 fixed connections of steel structures have shown poor performance and generally they were caught brittle fracture of beam flange weld to the column.In order to remedy to avoid similar situations in future earthquakes,researchers introduc...

Corrected method for fast measurement of single-cut Far-Field (FF) pattern at Quasi-Far-Field (QFF) distance linear antenna array any polarization by two orthogonal measurements has been proposed in this paper. The analytical equations were deduced based on cylindrical wave expansion (CWE). required don't need to satisfy the FF condition under test (AUT), only region small dimension AUT, so it ...