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VoGE: A Differentiable Volume Renderer using Gaussian Ellipsoids for Analysis-by-Synthesis [article]

Angtian Wang, Peng Wang, Jian Sun, Adam Kortylewski, Alan Yuille
2022 arXiv   pre-print
Differentiable rendering allows the application of computer graphics on vision tasks, e.g. object pose and shape fitting, via analysis-by-synthesis, where gradients at occluded regions are important when  ...  To efficiently render via VoGE, we propose an approximate close-form solution for the volume density aggregation and a coarse-to-fine rendering strategy.  ...  Conclusion In this work, we propose VoGE, a differentiable volume renderer using Gaussian Ellipsoids.  ... 
arXiv:2205.15401v1 fatcat:lbe5ijev6bcyfp5dub666pgqwa

Approximate Differentiable Rendering with Algebraic Surfaces [article]

Leonid Keselman, Martial Hebert
2022 arXiv   pre-print
In this work, we develop an approximate differentiable renderer for a compact, interpretable representation, which we call Fuzzy Metaballs.  ...  Differentiable renderers provide a direct mathematical link between an object's 3D representation and images of that object.  ...  VoGE [75] uses existing volume rendering techniques [49, 51] . Others use a DGT to build screen-space Gaussians for point clouds [1] .  ... 
arXiv:2207.10606v1 fatcat:fckm2ggx6jeeziu5w5lothsjy4

Cosmological Parameters from Observations of Galaxy Clusters

Steven W. Allen, August E. Evrard, Adam B. Mantz
2011 Annual Review of Astronomy and Astrophysics  
Studies of galaxy clusters have proved crucial in helping to establish the standard model of cosmology, with a universe dominated by dark matter and dark energy.  ...  We highlight several areas of opportunity for the next few years, and emphasize the need for accurate modeling of survey selection and sources of systematic error.  ...  Acknowledgments We are grateful to our colleagues for their many valuable insights.  ... 
doi:10.1146/annurev-astro-081710-102514 fatcat:yyy52wdepberjluy25wtq5aope

Dynamics of proteins in solution

Marco Grimaldo, Felix Roosen-Runge, Fajun Zhang, Frank Schreiber, Tilo Seydel
2019 Quarterly Reviews of Biophysics (print)  
We outline the underlying principles and review available instrumentation as well as related analysis frameworks.  ...  The hierarchical character of protein dynamics requires experimental tools addressing a broad range of time- and length scales.  ...  The authors are indebted to many collaborators, with whom it has been a pleasure to interact. These include in particular present and former members of the Tübingen-ILL collaboration.  ... 
doi:10.1017/s0033583519000027 fatcat:n25mwyf7trgfvfxmx4no7jby7q

ULTRACAM photometry of eclipsing cataclysmic variable stars [article]

William James Feline
2008 arXiv   pre-print
This thesis addresses both of these important topics via the analysis of the light curves of six eclipsing dwarf novae, obtained using ULTRACAM, a novel high-speed imaging photometer.  ...  In particular, the brightness distributions of the accretion discs of eclipsing systems can be mapped at a spatial resolution unachievable in any other astrophysical situation.  ...  A Gaussian function is frequently used, but in practice a Moffat profile (Moffat, 1969) often produces a better fit, and in any case approximates a Gaussian well in poor seeing.  ... 
arXiv:0806.0797v1 fatcat:53ne3znfnvblbhe23fwbtvvivm

Astrophysics in 2000

Virginia Trimble, Markus J. Aschwanden
2001 Publications of the Astronomical Society of the Pacific  
Several sections are oriented around processes -accretion, collimation, mergers, and disruptions -shared by a number of kinds of stars and galaxies.  ...  Several sections are oriented around processes-accretion, collimation, mergers, and disruptions-shared by a number of kinds of stars and galaxies.  ...  Goodman & Evans (1999) report the result of what is said to be the first analytically solved stability analysis of a differentially rotating, Mestel (1965) disk.  ... 
doi:10.1086/322844 fatcat:tffljntrgnbj7m45empz3jd7xa


C Motch
N(>S)-log S curves down to a few 10 −15 erg cm −2 s −1 at all energies.  ...  Current surveys are thus particularly well suited for the study of the hard X-ray emitting low luminosity population which has mostly escaped ROSAT scrutiny.  ...  ACKNOWLEDGMENTS We thank the Chandra X-ray Center DS and SDS teams for their efforts in reducing the data and for developing the software used in the data reduction (SDP) and analysis (CIAO).  ... 

Exploration and optimized siting of geothermal wells using a web-based spatial decision support system [article]

Daniel Waweru Mwaura, Technische Universität Berlin, Technische Universität Berlin, Martin Kada
As the world develops and economies grow, there is a commensurate rise in the demand for energy.  ...  The nature of the analysis of data as currently carried out, leads to a protracted process before any benefits of the vast resource can be realized.  ...  The results are organized into four main sections for ease of synthesis.  ... 
doi:10.14279/depositonce-7536 fatcat:te6fzwmslng3jee5frw6tra6cy