828 research outputs found
A review of creep deformation and rupture mechanisms of low Cr-Mo alloy for the development of creep damage constitutive equations under lower stress
A Computational Model for Thin Film Formation during Ion Beam Mixing(Physics, Processes, Instruments & Measurements)
Nonlinear Anisotropic Degenerate Parabolic-Hyperbolic Equations with Stochastic Forcing
We are concerned with nonlinear anisotropic degenerate parabolic-hyperbolic
equations with stochastic forcing, which are heterogeneous (i.e., not
space-translational invariant). A unified framework is established for the
continuous dependence estimates, fractional BV regularity estimates, and
well-posedness for stochastic entropy solutions of the nonlinear stochastic
degenerate parabolic-hyperbolic equation. In particular, we establish the
well-posedness of the nonlinear stochastic equation in
for and the --Nikolskii space with
, and the continuous dependence of the stochastic entropy
solutions not only on the initial data, but also on the degenerate diffusion
matrix function, the flux function, and the multiplicative noise function
involving in the nonlinear equation.Comment: 30 page
Guideline Learning for In-context Information Extraction
Large language models (LLMs) can perform a new task by merely conditioning on
task instructions and a few input-output examples, without optimizing any
parameters. This is called In-Context Learning (ICL). In-context Information
Extraction (IE) has recently garnered attention in the research community.
However, the performance of In-context IE generally lags behind the
state-of-the-art supervised expert models. We highlight a key reason for this
shortfall: underspecified task description. The limited-length context
struggles to thoroughly express the intricate IE task instructions and various
edge cases, leading to misalignment in task comprehension with humans. In this
paper, we propose a Guideline Learning (GL) framework for In-context IE which
reflectively learns and follows guidelines. During the learning phrase, GL
automatically synthesizes a set of guidelines based on a few error cases, and
during inference, GL retrieves helpful guidelines for better ICL. Moreover, we
propose a self-consistency-based active learning method to enhance the
efficiency of GL. Experiments on event extraction and relation extraction show
that GL can significantly improve the performance of in-context IE.Comment: EMNLP 2023 main conferenc
Anhuienoside C ameliorates atherosclerosis in rats via regulation of the NFκB/eNOS/NO signaling pathway
Purpose: To investigate the protective effect of anhuienoside C (AC) against high cholesterol dietinduced atherosclerosis in a rat model.
Methods: Atherosclerosis was induced in rats by administration of high fat diet for 8 weeks, and AC (20 and 40 mg/kg) was administered orally. The effect of AC was determined by assessing serum lipid profiles and mediators of inflammation, as well as oxidative stress parameters in aortic tissue using enzyme-linked immunosorbent assay (ELISA). Western blot assay and reverse transcription polymerase chain reaction (RT-PCR) were used for the evaluation of protein expressions.
Results: Serum levels of total cholesterol (TC), triglycerides (TGs), high density lipoprotein (HDL), low density lipoprotein (LDLP), and IL-1β, IL-18, TNF-α and NF-κB were significantly reduced in AC-treated group, relative to atherosclerotic rats (p < 0.01). Moreover, parameters of oxidative stress were attenuated in the aortic tissues of AC-treated group, when compared with atherosclerotic rats. There was significant increase in eNOS expression, and marked decrease in the expressions of MAPK and NF-kB protein in the aortic tissue homogenate of AC treated group, relative to atherosclerotic group (p <0.01). Treatment with AC attenuated the mRNA expressions of ICAM-1, VCAM-1 and MCP-1 in aortic tissue of the atherosclerotic rats.
Conclusion: These results reveal that AC prevents atherosclerosis in rats by modulating the NFκB/eNOS/NO signaling pathway, and thus, can thus potentially be developed as anti-atherosclerotic agent.
Keywords: Anhuienoside C, Atherosclerosis, Inflammation, Oxidative stress, Cholestero
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