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电子鼻技术及其在服装领域的应用 总被引:1,自引:0,他引:1
《现代纺织技术》2017,(2)
电子鼻作为一种由传感器阵列和模式识别系统组成,能够快速检测单一或复杂气体分子的智能设备,它的相关应用研究已在食物仓储、医学诊断、环境监测、农业生产、军事工程等多个领域展开,但该技术在纺织服装行业的应用并不广泛。文章对电子鼻技术的发展原理、传感器阵列、模式识别方法等作一简述,介绍了电子鼻在织物及服装异味检测、气味识别,品质评价以及人体异味监测等最新应用的研究进展,并对其未来发展趋势进行展望。 相似文献
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霉变是影响烟丝质量的重要因素之一,研究探索建立基于电子鼻技术的烟丝霉变检测方法。构建的电子鼻系统主要由5只SnO2半导体气敏传感器形成反应阵列,采用BP神经网络(back propagation neural network,BPNN)为主的模式识别方法。从每个传感器响应曲线中提取2个特征值,使用主成分分析和BP神经网络对传感器阵列的所有特征值进行处理。主成分分析结果显示:非霉变烟丝和霉变烟丝存在可区分趋势,但不同霉变程度的烟丝间存在部分重叠。进一步利用BP神经网络对霉变烟丝判别,识别正确率达到90.00%。试验表明,使用电子鼻技术可以客观、有效地区分霉变和非霉变烟丝,为有效控制烟丝质量提供了可靠途径。 相似文献
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电子鼻是以模拟人的嗅觉为基本原理,用来对食品中复杂嗅味和挥发性成分进行分析、识别和检测仪器,由气体传感器、信号处理和模式识别系统等组成。介绍了电子鼻的基本组成和原理,综述了电子鼻技术在茶叶、葡萄酒、肉类等食品中的感官评价方面的应用现状与发展趋势。 相似文献
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电子鼻技术是近年发展起来的一种新型仿生嗅觉检测技术,因其具备快速、无损等优点被广泛应用于食品品质检测领域。电子鼻通常包括两部分:硬件部分——多个性能彼此重叠的气体传感器;软件部分——恰当的模式识别技术对采集信号的分析、处理。本文主要综述了近年来国内外电子鼻技术在肉类品质分析中的应用。首先阐述了电子鼻技术工作原理、数据处理方法,随后重点讨论了电子鼻技术在肉类新鲜度评定、肉与肉制品品质区分、肉类有害成分监测、肉类掺假检测等4个方面的应用进展,最后对电子鼻技术目前存在的问题及未来发展趋势进行了简要探讨。 相似文献
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Adriana Marcia Graboski Sandra Cristina Ballen Alexandra Manzoli Flavio M. Shimizu Claudio Augusto Zakrzevski Juliana Steffens Clarice Steffens 《Food Analytical Methods》2018,11(1):77-87
Aroma in foodstuff is considered an essential attribute since it is closely related to the consumer acceptance of foodstuffs. Electronic nose (e-nose) system is composed by an array of gas sensor and has emerged as a promising alternative for the aroma volatile compounds recognition. In this study, a lab-made e-nose system comprising of an array of different polyaniline-based sensors has been used for aroma discrimination (apple, strawberry, and grape) in gummy candy. The sensor array was comprised by interdigitated graphite electrodes, using tracing paper substrate and sensitive layer of polyaniline (Pani) obtained by in situ and interfacial synthesis deposited by the in situ adsorption polymerization of aniline and layer-by-layer (LbL) methods. The sensors were characterized in relation to humidity and the Pani-in situ/PSS LbL layer presenting the higher sensitivity, a quite interesting feature for its use as a gas sensor. It has been demonstrated that the lab-made e-nose has been highly efficient in the discrimination of different concentrations of aromas added to gummy candies with excellent sensitivity and a limit of detection in the range of parts-per-billion, so demonstrated the applicability in food matrices. 相似文献
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This study explored the possibility of using an electronic nose (e-nose) with a 12-conducting-polymer sensor array combined with pattern recognition routines to discriminate between varying intensities of boar taint. A set of samples in a model system comprising a neutral lipid base containing varying combinations of androstenone and skatole were tested, as were pork fat samples. The e-nose responses for pork fat were calibrated against those given by a trained 10-member sensory panel for abnormal odour of the same samples from a total of 60 Large White cross-bred pigs. The e-nose responses related strongly to those of the sensory panel with a significant (p<0·01) canonical correlation of 0·78. The data set was used to develop a discriminant function for grouping pork samples into three `response classes': normal, doubtful and abnormal. Based on this, the e-nose identified all the abnormal samples correctly. However, 16% of the normal samples were also classified as abnormal. It was concluded that, in general, the electronic nose can discriminate between different levels of boar taint and that although a high specificity of sensors to androstenone and skatole may be desirable it may not be entirely important to the development and configuration of a boar taint sensor array. 相似文献
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电子舌在食品感官品评中的应用 总被引:5,自引:0,他引:5
电子舌是以人类味觉感受机理为基础研究开发的一种新型现代化分析检测仪器,通过传感器阵列代替生物味觉味蕾细胞感测检测对象,经系统的模式识别方法得到结果.本文介绍电子舌技术的结构特点及目前研究现状,并综述电子舌在初级农产品分级,茶、酒、饮料等食品感官品质鉴别方面的研究进展. 相似文献
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Yong Yin Yinfeng Hao Yu Bai Huichun Yu 《Sensing and Instrumentation for Food Quality and Safety》2017,11(1):24-32
Fisher discriminant analysis (FDA) is a very useful pattern recognition technique widely used in electronic nose system (e-nose). However, due to its linear characteristic, the classification problems of multi-class and high-dimensional e-nose data cannot be handled effectively. Therefore, a Gaussian-based kernel FDA (KFDA) method is proposed to solve multi-class and high-dimensional classification problems of complex samples such as food classification using e-nose. The key point of the method is how to determine the Gaussian kernel parameter. Firstly, according to distance discriminant analysis viewpoint, a desired kernel matrix adapted to Gaussian kernel function can be given successfully. Secondly, an evaluation function based on Euclidean distance is established for measuring the degree of approximation between actual kernel matrix containing an unknown Gaussian kernel parameter and the desired kernel matrix so as to get an optimal solution of the parameter, and then the actual kernel matrix can be definitely determined. Finally, the principal component analysis (PCA) for the actual kernel matrix is carried out. Meanwhile, FDA for the principal component matrix generated by PCA is also implemented in succession, and the KFDA is completed. Six kinds of Chinese spirit and six kinds of Chinese vinegar samples as two classification applications were respectively carried out accurately with the KFDA method; and the KFDA method is tested to be very simple and effective. The KFDA method may be promising for complex samples classification dataset of e-nose. 相似文献
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This paper presents an intelligent clothing framework for human daily activity recognition using a single waist-worn tri-axial accelerometer sensor coupled with a robust pattern recognition system. The activity recognition algorithm is realized to distinguish six different physical activities through three major steps: acceleration signal collection/pre-processing, wavelet-based principle component analysis, and a support vector machine classifier. The proposed activity recognition method has been experimentally validated through two batches of trials with an overall mean classification accuracy of 95.25 and 94.87%, respectively. These results suggest that the intelligent clothing is not only able to learn the activity patterns but also capable of generalizing new data from both known and unknown subjects. This enables the proposed intelligent clothing to be applied in a comfortable and in situ assessment of human physical activities, which would open up new market segments to the textile industry. 相似文献
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地理标志大米的仿生电子鼻分类识别 总被引:1,自引:0,他引:1
为了对地理标志大米进行原产地保护,采用PEN3电子鼻,分析样品质量、项空空间及静置时间等试验参数对电子鼻传感器响应值影响,结合主成分分析(PCA)和线性判别分析(LDA)方法对3个不同地理标志大米进行识别研究。结果表明:选取50 g样品,以50 mL顶空空间、静置1 h测得的电子鼻响应值最佳;PCA法可以区分不同地域的大米,也可以区分不同品种大米,LDA法也可以区分不同地域的大米,但不能区分不同品种的大米。运用电子鼻可以将地理标志大米进行较好的区分,为电子鼻技术应用于大米产地溯源提供理论基础。 相似文献