| Titre : |
Nonparametric bootstrap method for estimating the upper confidence limits of exposure point concentrations of formaldehyde in fur products - A case study of tongxiang city, China |
| Type de document : |
texte imprimé |
| Auteurs : |
Yuan Xuzheng, Auteur ; Wang Xuechuan, Auteur ; Lu Weina, Auteur ; Jiang Sujie, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 387-394 |
| Note générale : |
Bibliogr |
| Langues : |
Américain (ame) |
| Catégories : |
Fourrures -- Analyse
Fourrures -- Teneur en formaldehyde
Mesure -- Méthodes statistiques
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
The distribution characteristics of the formaldehyde (FA) content of fur products produced in Tongxiang City over three consecutive years (2014-2016) were analyzed by the Lilliefors test, quarterback robust statistical method, and kernel density estimation. The bootstrap simulation sampling method was used to calculate the upper confidence limits (UCL) of the exposure point concentration (EPC) of FA. The robustness and rationality of the UCL estimation were verified by the distribution of the mean value of each bootstrap sample dataset. The results showed that their distributions were close to normal distribution but were highly skewed. The one-sided 95% UCL on the mean were 95.45 mg/kg, 93.02 mg/kg and 86.64 mg/kg, which decreased year by year. The Wilcoxon rank sum test indicated that the population distribution of the FA content in 2016 showed a structural improvement over those of the previous two years. |
| Note de contenu : |
- SAMPLE SOURCES AND METHODS : Case study area : tongxiang city - Samples sources - Method for determination of FA - Data processing method for samples below the LOD - Polymorphic analysis of FA content for every year
- Estimation UCL for EPC of FA for every year
- Pairwise comparison of FA content by wilcoxon rank sum test
- RESULTS AND DISCUSSION : Data processing method for samples below the LOD - Descriptive statistical analysis of the FA content in fur products - Symmetry analysis of distribution of FA content in fur products - Computing UCL and programmed by MATLAB - UCL values and robustness verification - Pairwise comparison of FA content by the wilcoxon rand sum test |
| En ligne : |
https://drive.google.com/file/d/1d_Ldj-bt-EwIaewoBJT4Ha4OWKF6Yxxp/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29397 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXII, N° 11 (11/2017) . - p. 387-394
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