DSpace collection: 期刊論文

Universal surrogate likelihood functions for nonnegative continuous data

Thu, 23 Apr 2026 05:01:20 GMT

title: Universal surrogate likelihood functions for nonnegative continuous data abstract: 摘要： In independent and identically distributed situations, we show that one can properly correct the Poisson and the negative binomial likelihood functions to become asymptotically identical to the profile likelihood function for the mean parameter of nonnegative continuous distributions under mild conditions. We present theoretical justifications and use data analyses to demonstrate the merit of our new robust likelihood method. 其他題名： Metrika 出版者： Berlin/Heidelberg: Springer Berlin Heidelberg 出版日期： 2015-08-01 出處： Metrika, 2015-08, Vol.78 (6), p.635-646 資源來源： Springer Nature - Complete Springer Journals 版權： Springer-Verlag Berlin Heidelberg 2014 識別號： ISSN: 0026-1335 識別號： EISSN: 1435-926X 識別號： DOI: 10.1007/s00184-014-0519-3

Two-stage signal restoration based on a modified median filter

Thu, 23 Apr 2026 05:01:10 GMT

title: Two-stage signal restoration based on a modified median filter abstract: 摘要： Median filter is a robust technique for signal restoration when outliers occurred within observations. Moreover, smoothing splines is also an alternative method for recovering the underlying signals. Interestingly, we found that neither median filter nor smoothing splines dominates each other. To obtain a more robust signal estimate, a two-stage procedure for signal denoising is considered, in which the smoothing spline method is applied again to capture possible information within the differences of median filter and smoothing spline estimates. Then, according to an approximate estimator of -risk, a modified median filter method is proposed to estimate the underlying signals. Various comparisons are made via simulation studies to illustrate the superiority of the proposed method. 出版者： Abingdon: Taylor & Francis 出版日期： 2016-01-02 出處： Journal of statistical computation and simulation, 2016-01, Vol.86 (1), p.122-134 版權： 2015 Taylor & Francis 2015 版權： Copyright Taylor & Francis Ltd. 2016 識別號： ISSN: 0094-9655 識別號： EISSN: 1563-5163 識別號： DOI: 10.1080/00949655.2014.996152

The change of microbial community from chlorinated solvent-contaminated groundwater after biostimulation using the metagenome analysis

Thu, 23 Apr 2026 05:01:03 GMT

title: The change of microbial community from chlorinated solvent-contaminated groundwater after biostimulation using the metagenome analysis abstract: 摘要： •Matagenome analysis of PCE/TCE-contaminated groundwater.•Bacterial community of PCE/TCE-contaminated site using RDP and LCA methods was assessed.•SPRS caused the variation of bacterial community.•The detection of some genes related to TCE degradation pathway using KEGG analysis. The compositions of bacterial community in one site contaminated with PCE/TCE after the slow polycolloid-releasing substrate (SPRS) (contained vegetable oil, cane molasses, and surfactants) addition were analyzed. Results show that SPRS caused a rapid enhancement of reductive dechlorination of TCE. The transformation of PCE/TCE into ethene was observed after 20 days of operation. To compare the change of bacterial communities before and after SPRS addition, 16S rRNA amplicon sequencing using the metagenome analysis was performed. Results demonstrated the detection of the increased amounts of Dehalogenimonas by 2.2-fold, Pseudomonas by 3.4-fold and Sulfuricurvum by 4-fold with the analysis of the ribosomal database project (RDP). Metagenomic DNA was extracted from PCE/TCE-contaminated groundwater after SPRS addition, and subjected to sequencing. Results obtained from metagenomic sequencing indicate that genes from Dehalococcoides mccartyi was ranked as the second abundant bacteria among all of the detected bacteria via the analysis of the lowest common ancestor (LCA). Abundance of these bacterial groups, as shown above suggests their role in TCE biodegradation. Functional analysis of the metagenome, with the specific reference to chloroalkane and chloroalkene degradation, revealed the presence of some genes responsible for TCE biodegradation. Overall, results of this study provided new insights for a better understanding of the potential of biostimulation on TCE-contaminated sites. 其他題名： J Hazard Mater 出版者： Netherlands: Elsevier B.V 出版日期： 2016-01-25 出處： Journal of hazardous materials, 2016-01, Vol.302, p.144-150 版權： 2015 Elsevier B.V. 版權： Copyright © 2015 Elsevier B.V. All rights reserved. 識別號： ISSN: 0304-3894 識別號： EISSN: 1873-3336 識別號： DOI: 10.1016/j.jhazmat.2015.09.047 識別號： PMID: 26474376

Testing the homogeneity of proportions for clustered binary data without knowing the correlation structure

Thu, 23 Apr 2026 05:00:57 GMT

title: Testing the homogeneity of proportions for clustered binary data without knowing the correlation structure abstract: 摘要： A robust generalized score test for comparing groups of cluster binary data is proposed. This novel test is asymptotically valid for practically any underlying correlation configurations including the situation when correlation coefficients vary within or between clusters. This structure generally undermines the validity of the typical large sample properties of the method of maximum likelihood. Simulations and real data analysis are used to demonstrate the merit of this parametric robust method. Results show that our test is superior to two recently proposed test statistics advocated by other researchers. 出版者： Abingdon: Taylor & Francis 出版日期： 2015-08-03 出處： Journal of applied statistics, 2015-08, Vol.42 (8), p.1706-1715 資源來源： EBSCOhost Business Source Premier 版權： 2015 Taylor & Francis 2015 版權： Copyright Taylor & Francis Ltd. 2015 識別號： ISSN: 0266-4763 識別號： EISSN: 1360-0532 識別號： DOI: 10.1080/02664763.2015.1005062