266 research outputs found
CpG island density and its correlations with genomic features in mammalian genomes
A systematic analysis of CpG islands in ten mammalian genomes suggests that an increase in chromosome number elevates GC content and prevents loss of CpG islands
0- qubit in one Josephson junction
Quantum states are usually fragile which makes quantum computation being not
as stable as classical computation. Quantum correction codes can protect
quantum states but need a large number of physical qubits to code a single
logic qubit. Alternatively, the protection at the hardware level has been
recently developed to maintain the coherence of the quantum information by
using symmetries. However, it generally has to pay the expense of increasing
the complexity of the quantum devices. In this work, we show that the
protection at the hardware level can be approached without increasing the
complexity of the devices. The interplay between the spin-orbit coupling and
the Zeeman splitting in the semiconductor allows us to tune the Josephson
coupling in terms of the spin degree of freedom of Cooper pairs, the hallmark
of the superconducting spintronics. This leads to the implementation of the
parity-protected 0- superconducting qubit with only one highly transparent
superconductor-semiconductor Josephson junction, which makes our proposal
immune from the various fabrication imperfections.Comment: 5 pages, 4 figure
2-[4,5-Bis(ethylÂsulfanÂyl)-1,3-dithiol-2-ylÂidene]-5-(4-methoxyÂphenÂyl)-5H-1,3-dithiolo[4,5-c]pyrrole
The asymmetric unit of the title compound, C19H19NOS6, contains two independent molÂecules with different conformations of the ethyl groups. The dihedral angles between the pyrrole and benzene rings are 14.19â
(14) and 16.29â
(17)° in the two molecules. In the absence of short interÂmolecular contacts, in the crystal, the molÂecules are packed with their long axes parallel to [10]
2-[4,5-Bis(butylÂsulfanÂyl)-1,3-dithiol-2-ylÂidene]-5-methyl-5H-1,3-dithiolo[4,5-c]pyrrole-4-carbaldehyde
In the title compound, C18H23NOS6, the dithiolÂopyrrole ring is almost planar [r.m.s. deviation = 0.044â
(3)â
Ă
] and makes a dihedral angle of 25.11â
(7)° with the dithiole ring. In the crystal, pairs of neighboring molÂecules are connected by weak interÂmolecular CâHâŻO interÂactions. These dimers are further linked into a chain along [110] by CâHâŻO interÂactions
Mitigating Object Hallucinations in Large Vision-Language Models through Visual Contrastive Decoding
Large Vision-Language Models (LVLMs) have advanced considerably, intertwining
visual recognition and language understanding to generate content that is not
only coherent but also contextually attuned. Despite their success, LVLMs still
suffer from the issue of object hallucinations, where models generate plausible
yet incorrect outputs that include objects that do not exist in the images. To
mitigate this issue, we introduce Visual Contrastive Decoding (VCD), a simple
and training-free method that contrasts output distributions derived from
original and distorted visual inputs. The proposed VCD effectively reduces the
over-reliance on statistical bias and unimodal priors, two essential causes of
object hallucinations. This adjustment ensures the generated content is closely
grounded to visual inputs, resulting in contextually accurate outputs. Our
experiments show that VCD, without either additional training or the usage of
external tools, significantly mitigates the object hallucination issue across
different LVLM families. Beyond mitigating object hallucinations, VCD also
excels in general LVLM benchmarks, highlighting its wide-ranging applicability
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