5,182 research outputs found

    The Stability of RMB Exchange Rate and Its Perfection of Present Exchange Rate Mechanism

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    In the implement of Basel Accord, problems like regulatory capital arbitrage came up for the shortcomings of the accord. Securitization and other financial innovations have provided opportunities to reduce the regulatory capital requirements with little or no reduction in the overall economic risks. The possibility of regulatory capital arbitrage was caused by the inaccurate classification of the risks of different assets under Basel Accord. One of the routine methods is asset securitization, which will create value for banks while damaging the effect of the capital adequacy ratio as a prudential policy instrument. To deal with RCA (regulatory capital arbitrage), the most important is to match the regulatory capital to different assets and cut the motivation from the source so as to unify regulatory capital and economic capital. Key words: Capital Adequacy Ratio, Asset Securitization, Arbitrage Regulatio

    Global stability and scattering theory for non-cutoff Boltzmann equation with soft potentials in the whole space: weak collision regime}

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    A Traveling Maxwellian M=M(t,x,v)\mathcal{M} = \mathcal{M}(t, x, v) represents a traveling wave solution to the Boltzmann equation in the whole space Rx3\R^3_x(for the spatial variable). The primary objective of this study is to investigate the global-in-time stability of M\mathcal{M} and its associated scattering theory in Lx,v1L^1_{x,v} space for the non-cutoff Boltzmann equation with soft potentials when the dissipative effects induced by collisions are {\it weak}. We demonstrate the following results: (i) M\mathcal{M} exhibits Lyapunov stability; (ii) The perturbed solution, which is assumed to satisfy the same conservation law as M\mathcal{M}, scatters in Lx,v1L^1_{x,v} space towards a particular traveling wave (with an explicit convergence rate), which may not necessarily be M\mathcal{M}. The key elements in the proofs involve the formulation of the {\it Strichartz-Scaled Boltzmann equation}(achieved through the Strichartz-type scaling applied to the original equation) and the propagation of analytic smoothness.Comment: 27 page

    BiSyn-GAT+: Bi-Syntax Aware Graph Attention Network for Aspect-based Sentiment Analysis

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    Aspect-based sentiment analysis (ABSA) is a fine-grained sentiment analysis task that aims to align aspects and corresponding sentiments for aspect-specific sentiment polarity inference. It is challenging because a sentence may contain multiple aspects or complicated (e.g., conditional, coordinating, or adversative) relations. Recently, exploiting dependency syntax information with graph neural networks has been the most popular trend. Despite its success, methods that heavily rely on the dependency tree pose challenges in accurately modeling the alignment of the aspects and their words indicative of sentiment, since the dependency tree may provide noisy signals of unrelated associations (e.g., the "conj" relation between "great" and "dreadful" in Figure 2). In this paper, to alleviate this problem, we propose a Bi-Syntax aware Graph Attention Network (BiSyn-GAT+). Specifically, BiSyn-GAT+ fully exploits the syntax information (e.g., phrase segmentation and hierarchical structure) of the constituent tree of a sentence to model the sentiment-aware context of every single aspect (called intra-context) and the sentiment relations across aspects (called inter-context) for learning. Experiments on four benchmark datasets demonstrate that BiSyn-GAT+ outperforms the state-of-the-art methods consistently

    Switchable coupling between charge and flux qubits

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    We propose a hybrid quantum circuit with both charge and flux qubits connected to a large Josephson junction that gives rise to an effective inter-qubit coupling controlled by the external magnetic flux. This switchable inter-qubit coupling can be used to transfer back and forth an arbitrary superposition state between the charge qubit and the flux qubit working at the optimal point. The proposed hybrid circuit provides a promising quantum memory because the flux qubit at the optimal point can store the tranferred quantum state for a relatively long time.Comment: 5 pages, 1 figur

    Angular Reconstruction of a Lead Scintillating-Fiber Sandwiched Electromagnetic Calorimeter

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    A new method called Neighbor Cell Deposited Energy Ratio (NCDER) is proposed to reconstruct incidence position in a single layer for a 3-dimensional imaging electromagnetic calorimeter (ECAL).This method was applied to reconstruct the ECAL test beam data for the Alpha Magnetic Spectrometer-02 (AMS-02). The results show that this method can achieve an angular resolution of 7.36\pm 0.08 / \sqrt(E) \oplus 0.28 \pm 0.02 degree in the determination of the photons direction, which is much more precise than that obtained with the commonly-adopted Center of Gravity(COG) method (8.4 \pm 0.1 /sqrt(E) \oplus 0.8\pm0.3 degree). Furthermore, since it uses only the properties of electromagnetic showers, this new method could also be used for other type of fine grain sampling calorimeters.Comment: 6 pages, 8 figure

    Sparse-Representation-Based Direct Minimum L

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    A sparse-representation-based direct minimum Lp-norm algorithm is proposed for a two-dimensional MRI phase unwrapping. First, the algorithm converts the weighted-Lp-norm-minimization-based phase unwrapping problem into a linear system problem whose system (coefficient) matrix is a large, symmetric one. Then, the coefficient-matrix is represented in the sparse structure. Finally, standard direct solvers are employed to solve this linear system. Several wrapped phase datasets, including simulated and MR data, were used to evaluate this algorithm’s performance. The results demonstrated that the proposed algorithm for unwrapping MRI phase data is reliable and robust

    Protective effect of Radix Bupleuri extract against liver cirrhosis in rats

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    Purpose: To explore the effect of Radix Bupleuri extract (RBE) on diethylnitrosamine (DEN)-induced liver cirrhosis in rats.Methods: Rats were injected with DEN once a week for 8 weeks to induce liver cirrhosis. Some DENinduced rats were also treated with RBE, which was obtained by extracting dried Radix Bupleuri in water, for 8 weeks. Afterwards, biochemical indices and oxidative stress markers were assessed.Results: RBE significantly decreased serum concentrations of both alanine transaminase (137.3 ± 4.4 U/L, p < 0.01) and aspartate aminotransaminase (152.1 ± 3.4 U/L, p < 0.01) in DEN-induced rats at week 8. In addition, RBE significantly decreased malondialdehyde (0.13 ± 0.02 umol/L, p < 0.01) and superoxide dismutase (0.73 ± 0.04 U/mg protein, p < 0.01) levels in DEN-induced rats (p < 0.01).Conclusion: RBE exhibits a protective effect against DEN-induced liver cirrhosis in rats. Thus, it may have the potential to be used to treat liver cirrhosis in clinical settings.Keywords: Radix Bupleuri, Liver cirrhosis, Anti-oxidant, Diethylnitrosamine, Alanine transaminase, Aspartate aminotransaminas
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