5,532 research outputs found
The research progress of pressure ulcers and action mechanism of negative pressure wound therapy
压力性溃疡(PU)作为截瘫、昏迷及各种原因导致的长时间卧床患者的常见并发症,从最初的理论研究到现在的临床实践,其治疗方法产生了重大变化。负压创面疗法(NPWT)作为近20年来兴起的技术,其封闭、负压等特点,可以针对性作用于PU病程中的各种机制,在治疗PU方面取得了良好的临床效果。本文就PU的病因及发病机制研究进展及NPWT在PU治疗中的作用做一综述。Pressure ulcer (PU) is a common complication in patients with long time lying in bed due to paraplegia, coma and various reasons. It has produced significant changes in clinical practice from the initial theoretical study to the present clinical practice. As the new rising technology in the nearly 20 years, negative pressure wound therapy (NPWT) can be targeted at the various mechanisms of PU due to its closeness, negative pressure and other characteristics. It has achieved good curative effect in the treatment of PU. This article reviews the research progress on the etiology and pathogenesis of PU, and the role of NPWT in the treatment of PU
Quantum Criticality from in-situ Density Imaging
We perform large-scale Quantum Monte Carlo (QMC) simulations for strongly
interacting bosons in a 2D optical lattice trap, and confirm an excellent
agreement with the benchmarking in-situ density measurements by the Chicago
group [1]. We further present a general finite temperature phase diagram both
for the uniform and the trapped systems, and demonstrate how the universal
scaling properties near the superfluid(SF)-to-Mott insulator(MI) transition can
be observed by analysing the in-situ density profile. The characteristic
temperature to find such quantum criticality is estimated to be of the order of
the single-particle bandwidth, which should be achievable in the present or
near future experiments. Finally, we examine the validity regime of the local
fluctuation-dissipation theorem (FDT), which can be a used as a thermometry in
the strongly interacting regime.Comment: 4 page
Poly[bis[chloridocopper(I)]-μ4-1,4-bis[1-(3-pyridylmethyl)-1H-benzimidazol-2-yl]butane]
The title CuI coordination polymer, [Cu2Cl2(C30H28N6)]n, was obtained by reaction of CuCl2·2H2O and 1,4-bis[1-(3-pyridylmethyl)-1H-benzimidazol-2-yl]butane. Each CuI cation is three-coordinated by a ClN2 donor set. The anion acts as a tetradentate ligand, linking CuI centres into a polymeric chain
N′-(Butan-2-ylidene)furan-2-carbohydrazide
The title Schiff base compound, C9H12N2O2, was obtained from a condensation reaction of butan-2-one and furan-2-carbohydrazide. The furan ring and the hydrazide fragment are roughly planar, the largest deviation from the mean plane being 0.069 (2)Å, but the butanylidene group is twisted slightly with respect to this plane by a dihedral angle of 5.2 (3)°. In the crystal, intermolecular N—H⋯O hydrogen bonds link pairs of inversion-related molecules, forming dimers of R
2
2(8) graph-set motif
ISAC-NET: Model-driven Deep Learning for Integrated Passive Sensing and Communication
Recent advances in wireless communication with the enormous demands of
sensing ability have given rise to the integrated sensing and communication
(ISAC) technology, among which passive sensing plays an important role. The
main challenge of passive sensing is how to achieve high sensing performance in
the condition of communication demodulation errors. In this paper, we propose
an ISAC network (ISAC-NET) that combines passive sensing with communication
signal detection by using model-driven deep learning (DL). Dissimilar to
existing passive sensing algorithms that first demodulate the transmitted
symbols and then obtain passive sensing results from the demodulated symbols,
ISAC-NET obtains passive sensing results and communication demodulated symbols
simultaneously. Different from the data-driven DL method, we adopt the
block-by-block signal processing method that divides the ISAC-NET into the
passive sensing module, signal detection module and channel reconstruction
module. From the simulation results, ISAC-NET obtains better communication
performance than the traditional signal demodulation algorithm, which is close
to OAMP-Net2. Compared to the 2D-DFT algorithm, ISAC-NET demonstrates
significantly enhanced sensing performance. In summary, ISAC-NET is a promising
tool for passive sensing and communication in wireless communications.Comment: 29 pages, 11 figure
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