197 research outputs found
FuXi: A cascade machine learning forecasting system for 15-day global weather forecast
Over the past few years, due to the rapid development of machine learning
(ML) models for weather forecasting, state-of-the-art ML models have shown
superior performance compared to the European Centre for Medium-Range Weather
Forecasts (ECMWF)'s high-resolution forecast (HRES) in 10-day forecasts at a
spatial resolution of 0.25 degree. However, the challenge remains to perform
comparably to the ECMWF ensemble mean (EM) in 15-day forecasts. Previous
studies have demonstrated the importance of mitigating the accumulation of
forecast errors for effective long-term forecasts. Despite numerous efforts to
reduce accumulation errors, including autoregressive multi-time step loss,
using a single model is found to be insufficient to achieve optimal performance
in both short and long lead times. Therefore, we present FuXi, a cascaded ML
weather forecasting system that provides 15-day global forecasts with a
temporal resolution of 6 hours and a spatial resolution of 0.25 degree. FuXi is
developed using 39 years of the ECMWF ERA5 reanalysis dataset. The performance
evaluation, based on latitude-weighted root mean square error (RMSE) and
anomaly correlation coefficient (ACC), demonstrates that FuXi has comparable
forecast performance to ECMWF EM in 15-day forecasts, making FuXi the first
ML-based weather forecasting system to accomplish this achievement
A Study of User Adoption Factors of Mobile Banking Services Based on the Trust and Distrust Perspective
A large numbers of banks have paid attention to promote the Mobile banking service because this could provide real-time services ubiquitously and reduce the operating cost. However, the existence of risk and uncertainty in mobile banking may cause lack of trust so that consumers have pause and ponder to this services. Firstly, according to the differences between trust and distrust relationship, this article sets sight that the usersâ adoption to mobile banking is decided by the trust and distrust. Distrust is mainly affected by uncertainty avoidance, perceived cost, perceived risk; in the meanwhile, trust is influenced by the trust propensity, consumer cognition, perceived benefit and system quality. Finally, we build the adoption model based on the perspective of trust and distrust in order to provide a theoretical reference to mobile banking prolongation. Key words: Mobile banking; Adoption; Trust; Distrus
Proteomic and Physiological Analyses Reveal Putrescine Responses in Roots of Cucumber Stressed by NaCl
pH-sensitive degradable nanoparticles for highly efficient intracellular delivery of exogenous protein
A Curriculum Learning Approach for Multi-domain Text Classification Using Keyword weight Ranking
Text classification is a very classic NLP task, but it has two prominent
shortcomings: On the one hand, text classification is deeply domain-dependent.
That is, a classifier trained on the corpus of one domain may not perform so
well in another domain. On the other hand, text classification models require a
lot of annotated data for training. However, for some domains, there may not
exist enough annotated data. Therefore, it is valuable to investigate how to
efficiently utilize text data from different domains to improve the performance
of models in various domains. Some multi-domain text classification models are
trained by adversarial training to extract shared features among all domains
and the specific features of each domain. We noted that the distinctness of the
domain-specific features is different, so in this paper, we propose to use a
curriculum learning strategy based on keyword weight ranking to improve the
performance of multi-domain text classification models. The experimental
results on the Amazon review and FDU-MTL datasets show that our curriculum
learning strategy effectively improves the performance of multi-domain text
classification models based on adversarial learning and outperforms
state-of-the-art methods.Comment: Submitted to ICASSP2023 (currently under review
Temporal Artery Flow Response during the Last Minute of a Head Up Tilt Test, in Relation with Orthostatic Intolerance after a 60 Day Head-Down Bedrest
OBJECTIVE: Check if the Temporal flow response to Tilt could provide early hemodynamic pattern in the minutes preceding a syncope during the Tilt test performed after a 60-d head down bedrest (HDBR). METHOD: Twenty-one men divided into 3 groups [Control (Con), Resistive Vibration (RVE) and Chinese Herb (Herb)] underwent a 60 day HDBR. Pre and Post HDBR a 20 min Tilt identified Finishers (F) and Non Finishers (NF). Cerebral (MCA), Temporal (TEMP), Femoral (FEM) flow velocity, were measured by Doppler during the Tilt. Blood pressure (BP) was measured by arm cuff and cardiopress. RESULTS AND DISCUSSION: Four of the 21 subjects were NF at the post HDBR Tilt test (Con gr:2, RVE gr: 1, Herb gr: 1). At 1 min and 10 s before end of Tilt in NF gr, FEM flow decreased less and MCA decreased more at post HDBR Tilt compared to pre (p<0.05), while in the F gr they changed similarly as pre. In NF gr: TEMP flow decreased more at post HDBR Tilt compared to pre, but only at 10 s before the end of Tilt (P<0.05). During the last 10 s a negative TEMP diastolic component appeared which induced a drop in mean velocity until Tilt arrest. CONCLUSION: The sudden drop in TEMP flow with onset of a negative diastolic flow preceding the decrease in MCA flow confirm that the TEMP vascular resistance respond more directly than the cerebral one to the cardiac output redistribution and that this response occur several seconds before syncope
Hepatitis B virus spliced variants are associated with an impaired response to interferon therapy
During hepatitis B virus (HBV) replication, spliced HBV genomes and splice-generated proteins have been widely described, however, their biological and clinical significance remains to be defined. Here, an elevation of the proportion of HBV spliced variants in the sera of patients with chronic hepatitis B (CHB) is shown to correlate with an impaired respond to interferon-α (IFN-α) therapy. Transfection of the constructs encoding the three most dominant species of spliced variants into cells or ectopic expression of the two major spliced protein including HBSP and N-terminal-truncated viral polymerase protein result in strong suppression of IFN-α signaling transduction, while mutation of the major splicing-related sites of HBV attenuates the viral anti-IFN activities in both cell and mouse models. These results have associated the productions of HBV spliced variants with the failure response to IFN therapy and illuminate a novel mechanism where spliced viral products are employed to resist IFN-mediated host defense. </p
Novel preparation method for sustained-release PLGA microspheres using water-in-oil-in-hydrophilic-oil-in-water emulsion
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