PubAg

Main content area

You searched for: Subject "discriminant analysis" Remove constraint Subject: "discriminant analysis"
Start Over

Search

4,887  Search Results

« Previous | 1 - 20 of 4,887 |
Number of results to display per page

Search Results

1. A modified mean-variance feature-screening procedure for ultrahigh-dimensional discriminant analysis

Author:
He, Shengmei; Ma, Shuangge; Xu, Wangli
Source:
Computational statistics & data analysis 2019 v.137 pp. 155-169
ISSN:
0167-9473
Subject:
discriminant analysis,   etc   ; models; screening;     Show all 3 Subjects
Abstract:
... Cui et al. (2015) proposed a mean–variance feature-screening method based on the index MV(X|Y). By modifying MV(X|Y) with a weight function, a new index AD(X,Y) is introduced to measure the dependence between X and Y, and a corresponding feature-screening procedure called Anderson–Darling sure independence screening (AD-SIS) is proposed for ultrahigh-dimensional discriminant analysis. The sure scr ...
DOI:
10.1016/j.csda.2019.02.003

2. The four-interval, two-alternative forced-choice (4I2AFC): A powerful sensory discrimination method to detect small, directional changes particularly suitable for visual or manual evaluations

Author:
Bi, Jian; Kuesten, Carla
Source:
Food quality and preference 2019 v.73 pp. 202-209
ISSN:
0950-3293
Subject:
discriminant analysis,   etc   ; case studies; sensory evaluation;     Show all 3 Subjects
Abstract:
... The four-interval, two-alternative forced-choice (4I2AFC) is a paired version of the 2-AFC with AB and BA pairs as two alternatives, where A is a signal or a stronger stimulus and B is a noise or a weaker stimulus. The task of the subject in 4I2AFC is to select the pair (AB) with decreasing stimuli change. The 4I2AFC is a powerful sensory discrimination forced-choice method to detect small, direct ...
DOI:
10.1016/j.foodqual.2018.11.008

3. Contribution of lung function tests to the staging of severe equine asthma syndrome in the field

Author:
Simões, Joana; Sales Luís, José; Tilley, Paula
Source:
Research in veterinary science 2019 v.123 pp. 112-117
ISSN:
0034-5288
Subject:
discriminant analysis,   etc   ; asthma; histamine; horses; lung function; models; neutrophils;     Show all 7 Subjects
Abstract:
... Staging methods are useful tools for monitoring disease and response to treatment, and because Severe Equine Asthma Syndrome (SEAS) has a high prevalence in the equine population, a clinical staging method can provide important information to optimize equine care.Our team has previously developed and published a clinical staging method for SEAS and in the present study we further evaluated informa ...
DOI:
10.1016/j.rvsc.2018.12.014

4. Dismantling Babel: creation of a universal calibration for honey bee waggle dance decoding

Author:
Schürch, Roger; Zwirner, Keiran; Yambrick, Bethany J.; Pirault, Tiffanie; Wilson, James M.; Couvillon, Margaret J.
Source:
Animal behaviour 2019 v.150 pp. 139-145
ISSN:
0003-3472
Subject:
discriminant analysis,   etc   ; Apis mellifera; bee dances; foraging; honey bees; landscapes;     Show all 6 Subjects
Abstract:
... Noisy animal communication presents a unique challenge for biologists interpreting a produced signal precisely and accurately. One past approach has been to reduce noise. Lately, with the advance of quantitative tools, an alternative is to use the noise to improve model predictions. Here we take the latter approach to improve our ability to recover honey bee (Apis mellifera spp.) foraging location ...
DOI:
10.1016/j.anbehav.2019.01.016

5. Multivariate geochemical classification of chromitite layers in the Bushveld Complex, South Africa

Author:
Bachmann, Kai; Menzel, Peter; Tolosana-Delgado, Raimon; Schmidt, Christopher; Hill, Moritz; Gutzmer, Jens
Source:
Applied geochemistry 2019 v.103 pp. 106-117
ISSN:
0883-2927
Subject:
discriminant analysis,   etc   ; data collection; databases; geochemistry; uncertainty; South Africa;     Show all 6 Subjects
Abstract:
... The Bushveld Complex, the largest layered mafic-ultramafic intrusion worldwide, is host of numerous, laterally continuous and chemically similar chromitite layers. Based on their stratigraphic position the layers are subdivided into a lower, middle and upper group (LG, MG and UG). Within these groups the layers are numbered successively – from the base to the top of each group. Attempts of discrim ...
DOI:
10.1016/j.apgeochem.2019.02.009

6. Analysis of breakage patterns in a sheared layer of elongated particles

Author:
Schöngut, Marek; Grof, Zdenĕk; Štĕpánek, František
Source:
Powder technology 2019 v.345 pp. 682-691
ISSN:
0032-5910
Subject:
discriminant analysis,   etc   ; equipment design; equipment performance; particle size; powders;     Show all 5 Subjects
Abstract:
... Discrete Element Method (DEM) simulations of elongated (i.e. needle-shaped) particles breakage in a shear field confined between two parallel plates, in analogy with processes occurring in a powder shear cell tester, were carried out. Effects of particle strength, shear rate and the compressive stress were investigated. The breakage patterns occurring in a layer of particles due to compressive and ...
DOI:
10.1016/j.powtec.2019.01.045

7. Chemometric methods for classification of clonal varieties of green coffee using Raman spectroscopy and direct sample analysis

Author:
Luna, Aderval S.; da Silva, Arnaldo P.; da Silva, Camila S.; Lima, Igor C.A.; de Gois, Jefferson S.
Source:
Subtropical plant science 2019 v.76 pp. 44-50
ISSN:
0889-1575
Subject:
discriminant analysis,   etc   ; Bayesian theory; Raman spectroscopy; chemometrics; coffee beans; models;     Show all 6 Subjects
Abstract:
... This work presents the development of methods for classification of clonal varieties of coffee using chemometrics coupled to Raman spectroscopy and direct sample analysis. Spectra were collected directly from each bean in triplicate, and the homogeneity of the sample’s surface was studied. The spectral range between 1200 and 1800 cm−1 is related to organic groups that are relevant for the discrimi ...
DOI:
10.1016/j.jfca.2018.12.001

8. An ensemble variable selection method for vibrational spectroscopic data analysis

Author:
Zhang, Jixiong; Yan, Hong; Xiong, Yanmei; Li, Qianqian; Min, Shungeng
Source:
RSC advances 2019 v.9 no.12 pp. 6708-6716
ISSN:
2046-2069
Subject:
discriminant analysis,   etc   ; algorithms; data collection; models; shrinkage; spectral analysis; wavelengths;     Show all 7 Subjects
Abstract:
... Wavelength selection is a critical factor for pattern recognition of vibrational spectroscopic data. Not only does it alleviate the effect of dimensionality on an algorithm's generalization performance, but it also enhances the understanding and interpretability of multivariate classification models. In this study, a novel partial least squares discriminant analysis (PLSDA)-based wavelength select ...
DOI:
10.1039/c8ra08754g

9. Larval and early post-larval shell of three deep-sea Scaphopoda (Mollusca) from the southwest Atlantic

Author:
Vilela, Priscila Magalhães Silva; de Souza, Leonardo Santos; Caetano, Carlos Henrique Soares
Source:
Molluscan research 2019 v.39 no.1 pp. 35-43
ISSN:
1448-6067
Subject:
discriminant analysis,   etc   ; Callithrix; Dentaliida; Gadilida; coasts; larvae; morphometry; postlarvae; Brazil;     Show all 9 Subjects
Abstract:
... The larval shells of Antalis circumcincta (Watson, 1879) (order Dentaliida), Pertusiconcha callithrix (Dall, 1889) (order Gadilida) and of an undetermined species of uncertain systematic position are described. The material studied comprises mainly samples from deep waters, collected by expeditions along the southeast coast of Brazil. The larval shell of the three taxa matches other types previous ...
DOI:
10.1080/13235818.2018.1513896

10. Improvement of an emotional lexicon for the evaluation of beers

Author:
Mora, M.; Giussani, B.; Pagliarini, E.; Chaya, C.
Source:
Food quality and preference 2019 v.71 pp. 158-162
ISSN:
0950-3293
Subject:
discriminant analysis,   etc   ; beers; consumers (people); emotions; sensory evaluation;     Show all 5 Subjects
Abstract:
... Emotional response has been the subject of many studies during the last years. Many studies have shown the importance of using consumers to generate emotional lexicons. Chaya et al. (2015) developed a consumer defined (CD) lexicon to assess emotional response elicited by beer products. Shortly after, van Zyl and Meiselman (2015) presented a procedure to ensure that emotional lists were fully compo ...
DOI:
10.1016/j.foodqual.2018.06.007

11. Individual differences in replicated multi-product experiments with Thurstonian mixed models for binary paired comparison data

Author:
Linander, Christine Borgen; Bojesen Christensen, Rune Haubo; Cleaver, Graham; Brockhoff, Per Bruun
Source:
Food quality and preference 2019
ISSN:
0950-3293
Subject:
discriminant analysis,   etc   ; data analysis; sensory evaluation; statistical models;     Show all 4 Subjects
Abstract:
... Often sensory discrimination tests are performed with replications for the assessors. In this paper, we suggest a new way of analyzing data from a discrimination study. The model suggested in this paper is a Thurstonian mixed model, in which the variation from the assessors is modelled as a random effect in a generalized linear mixed model. The setting is a multi-product discrimination study with ...
DOI:
10.1016/j.foodqual.2019.01.010

12. Network linear discriminant analysis

Author:
Cai, Wei; Guan, Guoyu; Pan, Rui; Zhu, Xuening; Wang, Hansheng
Source:
Computational statistics & data analysis 2018 v.117 pp. 32-44
ISSN:
0167-9473
Subject:
discriminant analysis,   etc   ; information technology; models;     Show all 3 Subjects
Abstract:
... Linear discriminant analysis (LDA) is one of the most popularly used classification methods. With the rapid advance of information technology, network data are becoming increasingly available. A novel method called network linear discriminant analysis (NLDA) is proposed to deal with the classification problem for network data. The NLDA model takes both network information and predictive variables ...
DOI:
10.1016/j.csda.2017.07.007

13. Multi-elemental analysis as a tool for characterization and differentiation of Portuguese wines according to their Protected Geographical Indication

Author:
Rocha, Sílvia; Pinto, Edgar; Almeida, Agostinho; Fernandes, Eduarda
Source:
Food control 2019 v.103 pp. 27-35
ISSN:
0956-7135
Subject:
discriminant analysis,   etc   ; bromine; cadmium; cobalt; manganese; protected designation of origin; strontium; white wines; zinc; Portugal;     Show all 10 Subjects
Abstract:
... Portugal produces unique wines at special demarcated regions (Protected Geographical Indications – PGI) whose quality is increasingly recognized worldwide. The uniqueness of the wines produced at each PGI demands the development of methods that can ensure their quality and authenticity.In this study, it was investigated whether the wines from different Portuguese PGI could be differentiated based ...
DOI:
10.1016/j.foodcont.2019.03.034

14. Prediction of cross-species infection propensities of viruses with receptor similarity

Author:
Cho, Myeongji; Son, Hyeon Seok
Source:
Infection, genetics, and evolution 2019 v.73 pp. 71-80
ISSN:
1567-1348
Subject:
discriminant analysis,   etc   ; divergent evolution; emerging diseases; hosts; prediction; risk; sequence homology; virus transmission; viruses;     Show all 9 Subjects
Abstract:
... Studies of host factors that affect susceptibility to viral infections have led to the possibility of determining the risk of emerging infections in potential host organisms. In this study, we constructed a computational framework to estimate the probability of virus transmission between potential hosts based on the hypothesis that the major barrier to virus infection is differences in cell-recept ...
DOI:
10.1016/j.meegid.2019.04.016

15. Potential use of electronic tongue coupled with chemometrics analysis for early detection of the spoilage of Zygosaccharomyces rouxii in apple juice

Author:
Wang, Huxuan; Sun, Hongmin
Source:
Food chemistry 2019 v.290 pp. 152-158
ISSN:
0308-8146
Subject:
discriminant analysis,   etc   ; Zygosaccharomyces rouxii; apple juice; chemometrics; electronic tongue; food waste; least squares; spoilage; taste; yeasts;     Show all 10 Subjects
Abstract:
... Apple juice spoilage by Zygosaccharomyces rouxii could scarcely be identified at early stage. It is crucial to recognize the spoilage at early stage to prevent waste of products. In present study, electronic tongue was applied to detect the spoilage of Z. rouxii in apple juice, using taste evaluation by panelists as reference. Combined with linear discriminant analysis, identification of the conta ...
DOI:
10.1016/j.foodchem.2019.03.120

16. Double quantum dots-nanoporphyrin fluorescence-visualized paper-based sensors for detecting organophosphorus pesticides

Author:
Wang, Qin; Yin, Qiaobo; Fan, Yao; Zhang, Lei; Xu, Ying; Hu, Ou; Guo, Xiaoming; Shi, Qiong; Fu, Haiyan; She, Yuanbin
Source:
Talanta 2019 v.199 pp. 46-53
ISSN:
0039-9140
Subject:
discriminant analysis,   etc   ; apples; cabbage; color; dichlorvos; dimethoate; fluorescence; least squares; prediction; quantum dots;     Show all 10 Subjects
Abstract:
... A high-sensitivity fluorescence visualization paper-based sensor is developed and used to achieve specific detection and analysis of three organophosphorus pesticides (OPPs: dimethoate, dichlorvos, and demeton) in a "Turn-off-on" detection mode. The fluorescence visualization paper-based sensor is established through combining double quantum dots (QDs) with high-activity nanoporphyrins (QDs-nanopo ...
DOI:
10.1016/j.talanta.2019.02.023

17. Geographical origin authentication of onions using stable isotope ratio and compositions of C, H, O, N, and S

Author:
Park, Jin Hee; Choi, Seung-Hyun; Bong, Yeon-Sik
Source:
Food control 2019 v.101 pp. 121-125
ISSN:
0956-7135
Subject:
discriminant analysis,   etc   ; carbon; elemental composition; hydrogen; latitude; nitrogen; onions; oxygen; provenance; stable isotopes; sulfur; Korean Peninsula;     Show all 12 Subjects
Abstract:
... Both stable isotope ratio and content of carbon (C), hydrogen (H), oxygen (O), nitrogen (N), and sulfur (S) were employed to evaluate the possibility of geographical origin discrimination for onions grown in different regions in Korea. Significantly different elemental compositions were found in H, N, and S compositions, which might be related to different agricultural practices. The stable isotop ...
DOI:
10.1016/j.foodcont.2019.02.023

18. Rapid screening of ochratoxin A in wheat by infrared spectroscopy

Author:
De Girolamo, Annalisa; von Holst, Christoph; Cortese, Marina; Cervellieri, Salvatore; Pascale, Michelangelo; Longobardi, Francesco; Catucci, Lucia; Porricelli, Anna Chiara Raffaella; Lippolis, Vincenzo
Source:
Food chemistry 2019 v.282 pp. 95-100
ISSN:
0308-8146
Subject:
discriminant analysis,   etc   ; durum wheat; infrared spectroscopy; models; ochratoxin A; rapid methods; screening;     Show all 7 Subjects
Abstract:
... The use of infrared spectroscopy for the screening of 229 unprocessed durum wheat samples naturally contaminated with OTA has been investigated. Samples were analysed by both Fourier Transform near- and mid-infrared spectroscopy (FT-NIR, FT-MIR). Partial-Least Squares-Discriminant Analysis (PLS-DA) and Principal Component-Linear Discriminant Analysis (PC-LDA) classification models were used to dif ...
DOI:
10.1016/j.foodchem.2019.01.008

19. Comparison of flavonoid and policosanol profiles in Korean winter-spinach (Spinacia oleracea L.) cultivated in different regions

Author:
Yuk, Heung Joo; Ryu, Hyung Won; Kim, Doo-Young; Park, Mi Hyeon; Seo, Woo Duck; Jeong, Seong Hun; Oh, Sei-Ryang
Source:
Food chemistry 2019 v.279 pp. 202-208
ISSN:
0308-8146
Subject:
discriminant analysis,   etc   ; Spinacia oleracea; flavonoids; gas chromatography-mass spectrometry; least squares; metabolites; spinach; Korean Peninsula;     Show all 8 Subjects
Abstract:
... Spinach intake has long been highlighted globally because of its outstanding nutritional aspects. In this study, changes in flavonoids, a representative functional phytochemical group, were investigated by UPLC–QTof MS with multivariate analysis of winter-spinach samples from three different cultivation regions in Korea. From the partial least squares discriminant analysis (PLS-DA), the difference ...
DOI:
10.1016/j.foodchem.2018.11.143

20. High-throughput foodomics strategy for screening flavor components in dairy products using multiple mass spectrometry

Author:
Jia, Wei; Wang, Han; Shi, Lin; Zhang, Feng; Fan, Cheng; Chen, Xuefeng; Chang, James; Chu, Xiaogang
Source:
Food chemistry 2019 v.279 pp. 1-11
ISSN:
0308-8146
Subject:
discriminant analysis,   etc   ; flavor; flavor compounds; foodomics; mass spectrometry; milk; models; odors; screening;     Show all 9 Subjects
Abstract:
... A reliable Fisher discriminant model was established which was able to analyze the aroma component in milk, dairy products, flavors and fragrance, and applied on its variety identification. Foodomics was applied on screening of flavor components in 1093 dairy products and flavor samples in this study. Stepwise discrimination was used to screen the components of the dairy products and flavor sample ...
DOI:
10.1016/j.foodchem.2018.12.005