9,072 research outputs found
Renormalization of trace distance and multipartite entanglement close to the quantum phase transitions of one- and two-dimensional spin-chain systems
We investigate the quantum phase transitions of spin systems in one and two
dimensions by employing trace distance and multipartite entanglement along with
real-space quantum renormalization group method. As illustration examples, a
one-dimensional and a two-dimensional models are considered. It is shown
that the quantum phase transitions of these spin-chain systems can be revealed
by the singular behaviors of the first derivatives of renormalized trace
distance and multipartite entanglement in the thermodynamics limit. Moreover,
we find the renormalized trace distance and multipartite entanglement obey
certain universal exponential-type scaling laws in the vicinity of the quantum
critical points
A multiwavelength study of massive star-forming region IRAS 22506+5944
We present a multi-line study of the massive star-forming region IRAS
22506+5944. A new 6.7 GHz methanol maser was detected. 12CO, 13CO, C18O and
HCO+ J = 1-0 transition observations reveal a star formation complex consisting
mainly of two cores. The dominant core has a mass of more than 200 solar mass,
while another one only about 35 solar mass. Both cores are obviously at
different evolutionary stages. A 12CO energetic bipolar outflow was detected
with an outflow mass of about 15 solar mass.Comment: 9 pages, 4 figure
Di-μ-glutarato-κ4 O 1:O 5-bisÂ{aquaÂ[5,6-diphenyl-3-(pyridin-2-yl)-1,2,4-triazine-κ2 N 2,N 3]copper(II)}
In the centrosymmetric dinuclear title complex, [Cu2(C5H6O4)2(C20H14N4)2(H2O)2], the Cu atom displays a distorted square-pyramidal coordination environment with the basal plane occupied by two 5,6-diphenyl-3-(pyridin-2-yl)-1,2,4-triazine N atoms and two O atoms from different glutarate dianions, while a water molÂecule is located at the apical position. Of the two water H atoms, one is engaged in an intraÂmolecular O—H⋯O hydrogen bond, whereas the second is engaged in an interÂmolecular O—H⋯O hydrogen bond. The intermolecular hydrogen bonds lead to the formation of a chain along [010]
TriPINet: Tripartite Progressive Integration Network for Image Manipulation Localization
Image manipulation localization aims at distinguishing forged regions from
the whole test image. Although many outstanding prior arts have been proposed
for this task, there are still two issues that need to be further studied: 1)
how to fuse diverse types of features with forgery clues; 2) how to
progressively integrate multistage features for better localization
performance. In this paper, we propose a tripartite progressive integration
network (TriPINet) for end-to-end image manipulation localization. First, we
extract both visual perception information, e.g., RGB input images, and visual
imperceptible features, e.g., frequency and noise traces for forensic feature
learning. Second, we develop a guided cross-modality dual-attention (gCMDA)
module to fuse different types of forged clues. Third, we design a set of
progressive integration squeeze-and-excitation (PI-SE) modules to improve
localization performance by appropriately incorporating multiscale features in
the decoder. Extensive experiments are conducted to compare our method with
state-of-the-art image forensics approaches. The proposed TriPINet obtains
competitive results on several benchmark datasets
Dynamic Analysis and Control of the Clutch Filling Process in Clutch-to-Clutch Transmissions
Clutch fill control in clutch-to-clutch transmissions influences shift quality considerably. An oncoming clutch should be applied synchronously with the release of an offgoing clutch to shift gear smoothly; therefore, the gap between the piston and clutch plates should be eliminated when the torque capacity is near zero at the end of the clutch fill phase. Open-loop control is typically implemented for the clutch fill because of the cost of pressure sensor. Low control precision causes underfill or overfill to occur, deteriorating shift quality. In this paper, a mathematical model of an electrohydraulic clutch shift control system is presented. Special dynamic characteristic parameters for optimal clutch fill control are subsequently proposed. An automatic method for predicting initial fill control parameters is proposed to eliminate distinct discrepancies among transmissions caused by manufacturing or assembling errors. To prevent underfill and overfill, a fuzzy adaptive control method is proposed, in which clutch fill control parameters are adjusted self-adaptively and continually. Road vehicle test results proved that applying the fuzzy adaptive method ensures the consistency of shift quality even after the transmission’s status is changed
tert-Butyl 4-formyl-1H-imidazole-1-carboxylÂate
In the crystal structure of the title compound, C9H12N2O3, weak interÂmolecular C—H⋯O hydrogen bonds link the molÂecules into chains. Further weak C—H⋯O hydrogen bonds together with π–π interÂactions [centroid–centroid distance = 3.672 (4) Å] between neighbouring chains lead to a double-chain structure propagating in [100]
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