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On the need for bump event correction in vibration test profiles representing road excitations in automobiles
This paper presents an approach to the synthesis of compressed vibration test profiles
representing much longer time histories obtained in road testing of ground vehicles. Vibration test
profiles are defined as those related directly to operational testing on specific road surfaces and
which summarise the input to the vehicle in the given conditions. The method extends classical
Fourier transform technique by means of bump event correction in the background Fourier signal
where the bump event term implies a high-amplitude transient event of the shock type. The
orthogonal wavelet decomposition was used as a specific filtering tool facilitating bump event
identification. Examples of seat guide vertical acceleration have been considered. Calculated
probability density functions suggest the ability of the bump correction method to improve the
statistical accuracy of the final vibration test profile with respect to the original road data. Test
profiles obtained by means of Fourier transform synthesis with subsequent reinsertion of bump
events from separated frequency bands were more accurate than those obtained by Fourier synthesis
alone. Further developments led to advanced bump reinsertion with synchronisation of events
occurring in different frequency bands at the same moment of time. Test profiles generated in this
way have provided better accuracy compared to the non-synchronised algorithm
On the Possibility of Measuring the Single-tagged Exclusive Jets at the LHC
The feasibility studies of the measurement of the central exclusive jet
production at the LHC using the proton tagging technique are presented. In
order to reach the low jet-mass region, single tagged events were considered.
The studies were performed at the c.m. energy of 14 TeV and the ATLAS detector,
but are also applicable for the CMS-TOTEM experiments. Four data-taking
scenarios were considered: AFP and ALFA detectors as forward proton taggers and
= 0.55 m and = 90 m optics. After the event selection, the
signal-to-background ratio ranges between 5 and . Finally, the expected
precision of the central exclusive dijet cross-section measurement for data
collection period of 100 h is estimated
Diffractive Bremsstrahlung at High- LHC Case Study
Feasibility studies of the measurement of the exclusive diffractive
bremsstrahlung cross-section in proton-proton scattering at the centre of mass
energy of 13 TeV at the LHC are reported. Present studies were performed for
the low luminosity LHC running with the betatron function value of 90~m using
the ATLAS associated forward detectors ALFA and ZDC. A simplified approach to
the event simulation and reconstruction is used. The background influence is
also discussed.Comment: 20 pages, 10 figures. arXiv admin note: substantial text overlap with
arXiv:1603.0644
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