250 research outputs found
Highly sensitive torsion sensor with femtosecond laser-induced low birefringence single-mode fiber based Sagnac interferometer
A highly sensitive optical fiber torsion sensor with femtosecond laser-induced low birefringence SMF-based Sagnac interferometer (SI) is proposed and experimentally demonstrated in this paper. A straight-line waveguide positioned horizontally with respect to the fiber core is inscribed by the femtosecond laser in the cladding of the SMF, which leads to the asymmetry stress distribution in the SMF, and then gives rise to the low birefringence in the SMF. Compared with most of the previous reported SI based torsion sensors, there is no splicing joint in the femtosecond laser-induced low birefringence SMF-based SI, which lowers the transmission loss and makes the SI based torsion sensor more robust simultaneously. The experiment result shows that the proposed torsion sensor exhibits a torsion sensitivity of up to 3.2562 nm/degree, with the high torsion resolution of 0.003 degree. In contrast, the temperature cross-sensitivity and strain cross-sensitivity of the proposed torsion sensor are low, to −0.000055 degree/°C and 0.000013 degree/με, respectively, thus overcoming the cross-sensitivity problem resulting from temperature and strain. Moreover, theoretical analysis are carried out to compare with the experimental results to demonstrate the feasibility and good consistency
Asymmetric Fermi Superfluid With Two Types Of Pairings
We investigate the phase diagram in the plane of temperature and chemical
potential mismatch for an asymmetric fermion superfluid with double- and
single-species pairings. There is no mixing of these two types of pairings at
fixed chemical potential, but the introduction of the single species pairing
cures the magnetic instability at low temperature.Comment: 6 pages, 1 figure. Proceedings of Poster Session, Quark Matter 2006,
November 14-20, 2006, Shanghai, P.R.Chin
Amygdalin protects apoptosis of retinal ganglionic cells in glaucoma rats by regulating the expressions of anti- and pro-apoptotic proteins
Purpose: To evaluate the protective effect of amygdalin against glaucoma.Methods: Glaucoma was induced in rats via ischemia/reperfusion. The rats were treated with amygdalin (1 mg/kg) intraperitoneally (ip) for 5 weeks. Intra-ocular pressure (IOP), viability of retinal ganglion cell (RGCs) and histopathological changes in the retinal tissue of the glaucoma rats were determined. The expression levels of inflammatory cytokines and expressions of apoptotic factors were assessed in retinal tissues of all groups.Results: Intra-ocular pressure was reduced in amygdalin-treated group, when compared with the glaucoma group (p < 0.05). Moreover, the viability and thickness of RGCs in the amygdalin-treated group were enhanced, relative to untreated glaucoma rats. There was decrease in retinal cytokinelevels in amygdalin-treated group, when compared with untreated glaucoma rats. Amygdalin treatment ameliorated altered expressions of apoptosis proteins in the retinal tissue of ischemia/reperfusioninduced glaucoma rats.Conclusion: Amygdalin has a protective effect against ischemia/reperfusion-induced glaucoma in rats. Thus, it has a potential for use in the clinical management of glaucoma.
Keywords: Glaucoma, Amygdalin, Cytokines, Ischemia/reperfusion, Apoptosi
Convergence of the tail probability for weighted sums of negatively orthant dependent random variables
summary:In this research, strong convergence properties of the tail probability for weighted sums of negatively orthant dependent random variables are discussed. Some sharp theorems for weighted sums of arrays of rowwise negatively orthant dependent random variables are established. These results not only extend the corresponding ones of Cai [4], Wang et al. [19] and Shen [13], but also improve them, respectively
Asymmetric Fermion Superfluid with Inter- and Intra-Species Pairings
We investigate the phase structure of an asymmetric fermion superfluid with
inter- and intra-species pairings. The introduction of the intra-species
pairing mechanism in canonical ensemble changes significantly the phase diagram
and brings in a new state with coexisting inter- and intra-species pairings.
Different from the case with only inter-species pairing, all the fermion
excitations are fully gapped in the region with intra-species pairing.Comment: 5 pages, 4 figure
Adaptive Activation Network and Functional Regularization for Efficient and Flexible Deep Multi-Task Learning
Multi-task learning (MTL) is a common paradigm that seeks to improve the
generalization performance of task learning by training related tasks
simultaneously. However, it is still a challenging problem to search the
flexible and accurate architecture that can be shared among multiple tasks. In
this paper, we propose a novel deep learning model called Task Adaptive
Activation Network (TAAN) that can automatically learn the optimal network
architecture for MTL. The main principle of TAAN is to derive flexible
activation functions for different tasks from the data with other parameters of
the network fully shared. We further propose two functional regularization
methods that improve the MTL performance of TAAN. The improved performance of
both TAAN and the regularization methods is demonstrated by comprehensive
experiments.Comment: To appear in AAAI-202
Meson Mixing in Pion Superfluid
We investigate meson mixing and meson coupling constants in pion superfluid
in the framework of two flavor NJL model at finite isospin density. The mixing
strength develops fast with increasing isospin chemical potential, and the
coupling constants in normal phase and in the pion superfluid phase behave very
differently.Comment: 6 pages, 4 figures. Updates from version 2: 1, Correct Some language
mistakes and Some errors in the cited references. 2, Rewrite the last
sentence in the summary to indicate a possible way to measure the
isospin-asymmetry related meson propertie
Microbial denitrification characteristics of typical decentralized wastewater treatment processes based on 16S rRNA sequencing
Despite the widespread application of decentralized wastewater treatment (WWT) facilities in China, relatively few research has used the multi-media biological filter (MMBF) facilities to investigate the microorganism characteristics. This study utilizes 16S rRNA high-throughput sequencing (HTS) technology to examine the microbial biodiversity of a representative wastewater treatment (WWT) system in an expressway service area. The pathways of nitrogen removal along the treatment route were analyzed in conjunction with water quality monitoring. The distribution and composition of microbial flora in the samples were examined, and the dominant flora were identified using LEfSe analysis. The FAPROTAX methodology was employed to investigate the relative abundance of genes associated with the nitrogen cycle and to discern the presence of functional genes involved in nitrogen metabolism. On average, the method has a high level of efficiency in removing COD, TN, NH3-N, and TP from the effluent. The analysis of the microbial community identified a total of 40 phyla, 111 classes, 143 orders, 263 families, and 419 genera. The phyla that were predominantly observed include Proteobacteria, Acidobacteria, Chloroflexi, Actinobacteria, Nitrospirae, Bacteroidetes. The results show that the system has achieved high performance in nitrogen removal, the abundance of nitrification genes is significantly higher than that of other nitrogen cycle genes such as denitrification, and there are six nitrogen metabolism pathways, primarily nitrification, among which Nitrospirae and Nitrospira are the core differentiated flora that can adapt to low temperature conditions and participate in nitrification, and are the dominant nitrogen removal flora in cold regions. This work aims to comprehensively investigate the diversity and functional properties of the bacterial community in decentralized WWT processes
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