129,189 research outputs found
Width and size of regular resolution proofs
This paper discusses the topic of the minimum width of a regular resolution
refutation of a set of clauses. The main result shows that there are examples
having small regular resolution refutations, for which any regular refutation
must contain a large clause. This forms a contrast with corresponding results
for general resolution refutations.Comment: The article was reformatted using the style file for Logical Methods
in Computer Scienc
Super-Resolution of Positive Sources: the Discrete Setup
In single-molecule microscopy it is necessary to locate with high precision
point sources from noisy observations of the spectrum of the signal at
frequencies capped by , which is just about the frequency of natural
light. This paper rigorously establishes that this super-resolution problem can
be solved via linear programming in a stable manner. We prove that the quality
of the reconstruction crucially depends on the Rayleigh regularity of the
support of the signal; that is, on the maximum number of sources that can occur
within a square of side length about . The theoretical performance
guarantee is complemented with a converse result showing that our simple convex
program convex is nearly optimal. Finally, numerical experiments illustrate our
methods.Comment: 31 page, 7 figure
Optimal use of Charge Information for the HL-LHC Pixel Detector Readout
The pixel detectors for the High Luminosity upgrades of the ATLAS and CMS
detectors will preserve digitized charge information in spite of extremely high
hit rates. Both circuit physical size and output bandwidth will limit the
number of bits to which charge can be digitized and stored. We therefore study
the effect of the number of bits used for digitization and storage on single
and multi-particle cluster resolution, efficiency, classification, and particle
identification. We show how performance degrades as fewer bits are used to
digitize and to store charge. We find that with limited charge information (4
bits), one can achieve near optimal performance on a variety of tasks.Comment: 27 pages, 20 figure
- …