This paper presents a new way of combining Abel inversion and the Chapman model with linearly increasing scale height to retrieve ionospheric electron density vertical profiles from truncated-sounding radio-occultation data. A linear Vary–Chap is used cover blind region due data truncation, parameters estimated by enumeration possible values in grid centered around set compatible physics. The r...

Many different approaches have been developed to regularise the time-lapse geoelectrical inverse problem. While their advantages and limitations demonstrated using synthetic models, there few direct comparisons of performance field data. We test four inversion methods (independent inversion, temporal smoothness-constrained 4D spatial smoothness constrained data differences, sequential with cons...

The aim of seismic inversion is mapping all of the subsurface structures from seismic data. Due to the band-limited nature of the seismic data, it is difficult to find a unique solution for seismic inversion. Deterministic methods of seismic inversion are based on try and error techniques and provide a smooth map of elastic properties, while stochastic methods produce high-resolution maps of el...

In this paper, we explore the appealing possibility that the strong suppression of large-size QCD instantons – as evident from lattice data – is due to a surviving conformal space-time inversion symmetry. This symmetry is both suggested from the striking invariance of highquality lattice data for the instanton size distribution under inversion of the instanton size ρ → 〈ρ〉2/ρ and from the known...