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The aim of this study was to evaluate the usefulness of visible (VIS), near-infrared reflectance (NIR) and mid-infrared (MIR)
spectroscopy combined with pattern recognition methods as tools to differentiate grape juice samples from commercial Australian
Chardonnay (n = 121) and Riesling (n = 91) varieties. Principal component analysis (PCA), partial least squares discriminant analysis and linear discriminant
analysis (LDA) were applied to classified grape juice samples according to variety based on both NIR and MIR spectra using
full cross-validation (leave-one-out) as a validation method. Overall, LDA models correctly classify 86% and 80% of the grape
juice samples according to variety using MIR and VIS-NIR, respectively. The results from this study demonstrated that spectral
differences exist between the juice samples from different varietal origins and confirmed that the infrared (IR) spectrum
contains information able to discriminate among samples. Furthermore, analysis and interpretation of the eigenvectors from
the PCA models developed verified that the IR spectrum of the grape juice has enough information to allow the prediction of
the variety. These results also suggested that IR spectroscopy coupled with pattern recognition methods holds the necessary
information for a successful classification of juice samples of different varieties. 相似文献
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Nevil J. Anderson David R. Dixon Everard A. Swinton 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1979,29(6):332-338
From the results obtained in the treatment of a number of hard, alkaline feed waters in a pilot scale dealkalisation plant, it has been shown that the use of a magnetic carboxylic acid resin in a fluidised bed has definite advantages over conventional systems. Less resin is needed and simpler plants can handle the same throughput of raw water whilst maintaining the same quality of product. Plant operation is truely continuous without any complex valve system or pressurised vessels. 相似文献
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Network Management and Realtime Traffic Flow Measurement 总被引:2,自引:0,他引:2
Nevil Brownlee 《Journal of Network and Systems Management》1998,6(2):223-228
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Indoor visible mold and mold odor are associated with new‐onset childhood wheeze in a dose‐dependent manner 下载免费PDF全文
Caroline Shorter Julian Crane Nevil Pierse Phillipa Barnes Janice Kang Kristin Wickens Jeroen Douwes Thorsten Stanley Martin Täubel Anne Hyvärinen Philippa Howden‐Chapman the Wellington Region General Practitioner Research Network 《Indoor air》2018,28(1):6-15
Evidence is accumulating that indoor dampness and mold are associated with the development of asthma. The underlying mechanisms remain unknown. New Zealand has high rates of both asthma and indoor mold and is ideally placed to investigate this. We conducted an incident case‐control study involving 150 children with new‐onset wheeze, aged between 1 and 7 years, each matched to two control children with no history of wheezing. Each participant's home was assessed for moisture damage, condensation, and mold growth by researchers, an independent building assessor and parents. Repeated measures of temperature and humidity were made, and electrostatic dust cloths were used to collect airborne microbes. Cloths were analyzed using qPCR. Children were skin prick tested for aeroallergens to establish atopy. Strong positive associations were found between observations of visible mold and new‐onset wheezing in children (adjusted odds ratios ranged between 1.30 and 3.56; P ≤ .05). Visible mold and mold odor were consistently associated with new‐onset wheezing in a dose‐dependent manner. Measurements of qPCR microbial levels, temperature, and humidity were not associated with new‐onset wheezing. The association between mold and new‐onset wheeze was not modified by atopic status, suggesting a non‐allergic association. 相似文献
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Nevil Quinn 《国际水》2013,38(7):760-772
It is approaching two decades since South Africa's democratic transformation introduced a visionary approach to water resources management. The earlier challenges of water law reform have given way to the greater undertaking of implementation. This paper reviews progress in relation to 7 of the 10 key challenges of the Africa Water Vision 2025. Progress in many areas has been slow, including establishment of catchment management institutions and implementation of environmental flows. Concerns remain regarding poor water quality and aquatic ecosystem health. A significant threat is the persistent shortage of skilled water professionals. 相似文献