2,295 research outputs found
VCC-LF dataset
No full textThis is readme for VCC-LF dataset.
This dataset provides light field mat files that capture by Lytro I.
The light field resolusion is [h,w,u,v,d].
If you use these data or our toolkit code, please cite our paper properly
@inproceedings{ lirsiggraphasia2019,
title={Hierarchical and View-invariant Light Field Segmentation by Maximizing Entropy Rate on 4D Ray Graphs},
author={Li, Rui and Heidrich, Wolfgang},
booktitle={ACM Transactions on Graphics (Proc. SIGGRAPH Asia)},
year={2019},
publisher={ACM}
LF-copying without LF
No full textAbstractA copying approach to ellipsis is presented, whereby the locus of copying is not a level of derived syntactic structure (LF), but rather the derivation itself. The ban on preposition stranding in sprouting follows without further stipulation, and other, seemingly structure sensitive, empirical generalizations about elliptical constructions, including the preposition stranding generalization, follow naturally as well. Destructive operations which ‘repair’ non-identical antecedents are recast in terms of exact identity of derivations with parameters. In the context of a compositional semantic interpretation scheme, the derivational copying approach to ellipsis presented here is revealed to be a particular instance of a proform theory, thus showing that the distinctions between, and arguments about, syntactic and semantic theories of ellipsis need to be revisited
A Schwarz lemma for complete Riemannian manifolds
No full textAuthor name used in this publication: Leung-Fu CheungVersion of RecordPublishedVoR allowe
The second variation formula for exponentially harmonic maps
No full textAuthor name used in this publication: Leung-Fu CheungVersion of RecordPublishedVoR allowe
Polynomial Approximation in Ep(D) with 0 < p < 1
No full textAbstractIn this paper, we construct approximants by means of interpolation polynomialsto prove Jackson′s theorem and the Bernstein inequality in Ep(D) with 0 < p < 1
Mean Convergence of Interpolation Polynomials in a Domain with Corners
No full textAbstractIn this paper, we prove mean convergence of interpolation polynomials in a domain with some corners
Machine learning and digital twins: monitoring and control for dynamic security in power systems
No full textThe reader of the chapter will be able to connect techniques from machine learning (ML) and digital twins (DTs) to gain insights for monitoring and control of (dynamic) security for electrical power systems. DTs are validated and verified high-fidelity (hf) models providing high simulation accuracy. DTs can be used for simulation of the supervised process of system operation and are therefore able to provide synthetic studied data, where measurement data are scarce. However, for some real-time applications in monitoring and control, such high-fidelity simulation models are not appropriate due to the corresponding computational barrier. There, ML aims to create an application-specific, low-fidelity (lf) approximation of the digital twin. Such trained lf models are used in real-time applications where computational time is scarce and lf information is sufficient. The conceptual intersection of hf and lf models has been little explored and becomes increasingly complex. This chapter aims to provide a conceptual overview of how such hf and lf models can be combined. This chapter is split into two parts where the first part is to introduce ML, lf models, and digital twins, hf models, for power systems analysis, and the second chapter is to use these two types of models to form purpose-driven surrogate lf models, illustrated on the example of dynamic security assessment (DSA). In the first part, the concepts for using DTs as hf models for online power system studies and their corresponding tuning of model parameters are introduced. Subsequently, ML i.e., lf models, are introduced and their corresponding training frameworks. Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Intelligent Electrical Power Grid
Effectiveness of Chinese medicines in treating chronic liver diseases
No full textChronic liver diseases mainly indicate liver fibrosis (LF) and cirrhosis. Advanced liver fibrosis may result in fatal complications including liver cirrhosis and hepatocellular carcinoma (HCC). LF is suggested to be reversible but lack of conclusive evidence on effective and safe therapy currently. Transarterial chemoembolization (TACE) is the primary option with severe adverse effects for unresectable HCC patients because most HCC are detected at a very advanced stage. Meanwhile, Chinese medicine (CM) has been considered as an alternative therapy for LF and HCC because of its low cost and high safety.
This thesis aims to (1) conduct comprehensive meta-analysis and systematic reviews of randomized controlled clinical trials (RCTs) to critically evaluate the efficacy and safety of CMs in treating LF and unresectable HCC; (2) explore its potential as an evidence-based alternative or adjuvant therapy for LF or HCC.
The studies were conducted according to the Cochrane guidelines for systematic review and PRISMA statement. Comprehensive databases were used including MEDLINE, AMED, EMBASE, The Cochrane Library, CINAHL Plus, PubMed, CNKI, TCMOnline, Chinese Biomedical Literature Database, WanFang Database, and Chinese Medical Current Contents. The bibliographies of identified studies were also screened. RCTs examining the effects of CMs in treating LF patients or CMs combined with TACE in treating unresectable HCC patients were included. Inverse-variance random effects model was used to calculate the mean difference (MD) with 95% confidence intervals (CIs) in the LF systematic review when both risk ratios (RRs) and MD were used in the HCC review. Heterogeneity and publication bias were estimated. The methodological quality of included RCTs were assessed using the Cochrane ‘risk of bias’ assessment.
Twenty-three RCTs (number of patients=2123) were eligible for LF review and 67 RCTs (number of patients=5211) for HCC review. For LF review, 15 RCTs were classified as high quality. Significant reduction in LF biomarkers including HA, LN, PC-III and IV-C was found in CHM alone and CHM plus Western medicine group when compared with Western medicine alone. For HCC review, 26 RCTs were ranked as high quality. Significant improvement in tumor response, survival, immunity and quality of life, and decrease of TACE toxicity were found in the CMs plus TACE compared with TACE alone. No clinically significant CMassociated adverse events were observed for both LF and HCC trials.
The results of both LF and HCC reviews have shown that CMs may exert antifibrotic and anti-HCC properties. The findings indicate that CMs can be considered as a potential alternative therapy for LF or HCC. Due to the low methodological quality and significant heterogeneity, RCTs with large sample size, long-term follow-up, and standard research protocols compliance with CONSORT guidelines are needed for further investigation.published_or_final_versionChinese MedicineDoctoralDoctor of Philosoph
Significance of ligamentum flavum hypertrophy in developmental spinal stenosis
No full textIntroduction: Developmental spinal stenosis (DSS) manifests as a narrowed spinal canal. These subjects are potentially at-risk of developing symptoms with smaller degrees of canal pathologies including ligamentum flavum (LF). However, its relationship is currently unknown. This study aims to address the association of DSS with LF hypertrophy in an attempt to better understand its clinical relevance and natural course. Methods: This prospective study consists of 31 patients who had surgical decompression (28 stenosis patients, 3 controls). Preoperative MRIs were used for anteroposterior spinal canal diameter measurement, which classifies patients having either developmental or degenerative spinal stenosis. Ligamentum flavum was collected during surgery for analysis. The degree of fibrosis is evaluated microscopically by Masson Trichrome staining. Results: There were 17 females and 14 males with mean age of 63.9 years. L5/S1 was most frequently degenerative. Spinal canal diameters can vary between the intervertebral levels within the same patient. Degrees of fibrosis vary between levels and between sides. For degenerative spinal stenosis, the degree of fibrosis significantly correlates with LF thickness. In DSS, the most narrowed spinal canal did not associate with thickening of the LF. Conclusions: For DSS, spinal canal can be relatively much narrowed, yet LF may not be greatly thickened with large degrees of fibrosis. This suggests that in DSS, symptoms can occur with a smaller degree of intracanal pathology. Fibrosis within hypertrophic LF is location and site-specific. Further analysis with immunohistochemistry can better delineate the associations between LF and DSS
Deep spectroscopic luminosity function of Abell 85 : no evidence for a steep upturn of the faint-end slope
No full textIA, AD and ALS acknowledge partial support from the INFN grant InDark and from the grant Progetti di Ateneo TO Call 2012 0011 ‘Marco Polo’ of the University of Torino.We present a new deep determination of the spectroscopic luminosity function (LF) within the virial radius of the nearby and massive Abell 85 (A85) cluster down to the dwarf regime (M* + 6) using Very Large Telescope/Visible Multi-Object Spectrograph (VLT/VIMOS) spectra for ∼2000 galaxies with mr ≤ 21 mag and 〈μe,r〉 ≤ 24 mag arcsec−2. The resulting LF from 438 cluster members is best modelled by a double Schechter function due to the presence of a statistically significant upturn at the faint end. The amplitude of this upturn (αf ~ -1.58+0.19-0.15), however, is much smaller than that of the Sloan Digital Sky Survey (SDSS) composite photometric cluster LF by Popesso et al., αf ∼ −2. The faint-end slope of the LF in A85 is consistent, within the uncertainties, with that of the field. The red galaxy population dominates the LF at low luminosities, and is the main factor responsible for the upturn. The fact that the slopes of the spectroscopic LFs in the field and in a cluster as massive as A85 are similar suggests that the cluster environment does not play a major role in determining the abundance of low-mass galaxies.Peer reviewe
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