5,880 research outputs found

    A Mixing Coupling Scheme for Spectra of Singly Heavy Baryons with Spin-1 Diquarks in P-waves

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    A new scheme of state classification is proposed and applied to analyze masses of the heavy baryons ΩQ\Omega_{Q}, ΣQ\Sigma_{Q} and ΞQ′\Xi_{Q}^{\prime} in P-waves. The results confirm all excited Ωc\Omega_{c} and Ωb\Omega_{b} baryons reported recently by LHCb to be bound states of a P-wave ssss-diquark and a respective charm or bottom quark, and thereby predict Regge trajectories for more excited Ωc\Omega_{c} and Ωb\Omega_{b} baryons. We suggest one excited {JP=5/2−J^{P}=5/2^{-}} Ωb\Omega_{b} state to be unseen by LHCb around 63526352 MeV, and predict P-wave masses of all spin-partners of the odd-parity baryons Σc(2800)/Ξc′(2942)\Sigma_{c}(2800)/\Xi_{c}^{\prime}(2942) and Σb(6097)\Sigma_{b}(6097)/Ξb′(6227)\Xi_{b}^{\prime }(6227). A computation is further given in a relativized potential quark models to explain matched values of spin couplings of all considered baryons, by which a scaling law for these spin couplings is discussed.Comment: 28 pages, 3 figures in total, with one new figure (FIG. 3) and one new section (Section VI) added in this enlarged version(V3). Due to twice extensions (Section V and Section VI added) including two newly added figures(FIG. 2 and FIG. 3), we also changed the title correspondingl

    The charged-current non-standard neutrino interactions at the LHC and HL-LHC

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    A series of new physics scenarios predict the existence of the extra charged gauge boson W′W', which can induce the charged-current (CC) non-standard neutrino interactions (NSI). By using the Monte-Carlo (MC) simulation, we discuss the sensitivity and constraints on the CC NSI parameters ϵαβqq′Y\epsilon^{qq'Y}_{\alpha\beta} (α=β=e\alpha = \beta = e or μ\mu) for different W′W' masses MW′ M_{W'} via the process pp→W′→ℓνp p \rightarrow W'\rightarrow \ell\nu . We find that the interference term plays an important role which was usually neglected in the LHC experiments. We further analyzed the future and high-luminosity (HL) LHC sensitivities to the CC NSI parameters with s\sqrt{s} = 14 TeV and L\mathcal{L} = 300  fb−1300\;{\rm fb}^{-1}, 1  ab−11\;{\rm ab}^{-1} and 3  ab−13\;{\rm ab}^{-1}.Comment: 22 pages, 38 figures, 4 table

    Far-field Super-resolution Chemical Microscopy

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    Far-field chemical microscopy providing molecular electronic or vibrational fingerprint information opens a new window for the study of three-dimensional biological, material, and chemical systems. Chemical microscopy provides a nondestructive way of chemical identification without exterior labels. However, the diffraction limit of optics hindered it from discovering more details under the resolution limit. Recent development of super-resolution techniques gives enlightenment to open this door behind far-field chemical microscopy. Here, we review recent advances that have pushed the boundary of far-field chemical microscopy in terms of spatial resolution. We further highlight applications in biomedical research, material characterization, environmental study, cultural heritage conservation, and integrated chip inspection.Comment: 34 pages, 8 figures,1 tabl

    Stator-flux-oriented fault-tolerant control of flux-switching permanent-magnet motors

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    Flux-switching permanent-magnet (FSPM) motors are a newly developed brushless AC (BLAC) machine having magnets in the stator. This paper proposes and implements a stator-flux-oriented (SFO) control strategy for fault-tolerant operation of FSPM motors. The key is to set the q-axis component of armature current invariant before and after the fault. In the rotor reference frame, by building a SFO-dq equation of the FSPM motor, the fault-tolerant control strategy is deduced. The finite-element method and the field-circuit cosimulation method are employed to analyze the performance of the FSPM motor drive. Finally, a dSPACE-based FSPM motor drive platform is built for experimental verification. Both the steady-state and dynamic performances at normal and fault-tolerant operations are tested, confirming that the proposed fault-tolerant operation can keep the output torque invariant while offering good dynamic performance during fault. © 2011 IEEE.published_or_final_versionThe IEEE International Magnetic Conference (INTERMAG2011), Taipei, Taiwan, 25-29 April 2011. In IEEE Transactions on Magnetics, 2011, v. 47 n. 10, p. 4191-419

    Bank Credit Strategy Model Based on AHP-Fuzzy Comprehensive Evaluation

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    Credit risk control and credit strategy formulation of medium and micro enterprises have always been important strategic issues faced by commercial banks. Banks usually make corporate loan policies based on the credit degree, the information of trading bills and the relationship of supply-demand chain of the enterprise. In this paper, we established the AHP-Fuzzy comprehensive evaluation model for quantifying enterprise credit risk. Based on the relevant data of 123 enterprises with credit records, the credit strategy is formulated according to the three indicators of enterprise strength, enterprise reputation and stability of supply-demand relationship. This paper also combines the credit reputation, credit risk and supply and demand stability rating in order to establish the bank credit strategic planning model to decide whether to lend or not and the lending order. The conclusion shows that, under the condition of constant total loan amount, the enterprises with the highest credit rating should be given priority. Then, combined with the change of customer turnover rate with interest rate, we take the bank's maximize expected income as objective to calculate the optimal loan interest rate of different customer groups

    Tim-3 Negatively Regulates IL-12 Expression by Monocytes in HCV Infection

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    T cell immunoglobulin and mucin domain-containing protein 3 (Tim-3) is a newly identified negative immunomodulator that is up-regulated on dysfunctional T cells during viral infections. The expression and function of Tim-3 on human innate immune responses during HCV infection, however, remains poorly characterized. In this study, we report that Tim-3 is constitutively expressed on human resting CD14+ monocyte/macrophages (M/MØ) and functions as a cap to block IL-12, a key pro-inflammatory cytokine linking innate and adaptive immune responses. Tim-3 expression is significantly reduced and IL-12 expression increased upon stimulation with Toll-like receptor 4 (TLR4) ligand - lipopolysaccharide (LPS) and TLR7/8 ligand - R848. Notably, Tim-3 is over-expressed on un-stimulated as well as TLR-stimulated M/MØ, which is inversely associated with the diminished IL-12 expression in chronically HCV-infected individuals when compared to healthy subjects. Up-regulation of Tim-3 and inhibition of IL-12 are also observed in M/MØ incubated with HCV-expressing hepatocytes, as well as in primary M/MØ or monocytic THP-1 cells incubated with HCV core protein, an effect that mimics the function of complement C1q and is reversible by blocking the HCV core/gC1qR interaction. Importantly, blockade of Tim-3 signaling significantly rescues HCV-mediated inhibition of IL-12, which is primarily expressed by Tim-3 negative M/MØ. Tim-3 blockade reduces HCV core-mediated expression of the negative immunoregulators PD-1 and SOCS-1 and increases STAT-1 phosphorylation. Conversely, blocking PD-1 or silencing SOCS-1 gene expression also decreases Tim-3 expression and enhances IL-12 secretion and STAT-1 phosphorylation. These findings suggest that Tim-3 plays a crucial role in negative regulation of innate immune responses, through crosstalk with PD-1 and SOCS-1 and limiting STAT-1 phosphorylation, and may be a novel target for immunotherapy to HCV infection
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