A Non-light-of-sight (NLOS) mitigation approach based on GBSBEM was proposed in this paper. The main idea is to model the NLOS errors to the elliptical model and mitigate them with a novel method. At the first step, the semi-minor of GBSBEM is estimated, then a way to restrain the NLOS errors with the help of the semi-minor is used. When the semi-minor can not be estimated, an optimization meth...

The tightness of the observed colour-magnitude and Mg2velocity dispersion relations for elliptical galaxies has often been cited as an argument against a picture in which ellipticals form by the merging of spiral disks. A common view is that merging would mix together stars of disparate ages and produce a large scatter in these relations. Here I use semi-analytic models of galaxy formation to d...

A large number of bridges in the federal inventory are reaching the end of their design life due to aging and environmental degradation. The situation is aggravated by increased traffic needs that require existing structures to carry heavier loads at increasingly higher speeds. Project Summary: The issue of moisture diffusion in composite materials is important because of its associated problem...

SYNOPSIS The mechanical properties and microstructure of AlSilOMg alloy samples that were printed by selective laser melting (SLM) studied to determine the effect processing parameters building orientation. After printing, was stress relieved at 250°C for 2 hours. microstructures analysed optical microscopy scanning electron (SEM) phases distribution. Phase transformation characteristics materi...

The critical subject of transverse crack detection in a rail head is treated in this paper. Conventional bulk wave ultrasonic techniques often fail because of shelling and other surface imperfections that shield the defects that lie below the shelling. A guided wave inspection technique is introduced here that can send ultrasonic energy along the rail under the shelling with a capability of fin...