烟草行业基于业务数据流向的可视化研究

根据福建省烟草专卖局对行业的业务数据的管理需求,探索流量分析技术在烟草行业中的应用,通过数据采集提取业务关键指标,利用数据处理技术形成业务系统服务质量关键指标体系,借助数据关联分析形成可视化业务拓扑模型的过程,对业务数据流向的可视化进行探讨。     

近红外光谱技术结合教与学算法优化极限学习机实现烤烟等级判定

该研究基于近红外光谱（NIRs）技术,以2016～2018年来自13个省份的937个烟叶样本为研究对象,比较了竞争性自适应重加权采样方法（CARS）、蒙特卡洛无信息变量消除法（MC－UVE）以及随机青蛙算法（RF）3种变量筛选方法的极限学习机（ELM）模型效果,与常规判别方法偏最小二乘判别分析（PLS－DA）比较,验证了ELM模型的优势。并通过教与学优化（TLBO）算法对ELM模型进行优化,建立烤烟样本的等级判定模型。结果表明,验证集的分类正确率达到90.16%,测试集的外部验证表现良好,TLBO－ELM模型收敛速度快,泛化能力强,可应用于烤烟等级判定。近红外光谱技术结合教与学算法优化极限学习机为智能化实现烟叶等级判定提供了一种新方法。     

Urinary volatomic profile of traditional tobacco smokers and electronic cigarettes users as a strategy to unveil potential health issues

Many harmful and potentially harmful constituents are present in tobacco products. Cigarette smoke is known to cause different forms of cancer and trigger the development of chronic diseases. In the last decade, electronic cigarettes have emerged as a healthier alternative associated to less harmful effects in comparison to traditional tobacco. However, the lack of standardization of electronic cigarettes products makes it difficult to establish and compare the real effects on health of products from different manufacturers. To better understand the impact of smoking and vaping, the volatomic composition of urine samples from traditional tobacco smokers and electronic cigarette users was established and compared with nonsmokers (control group), using headspace solid-phase microextraction combined with gas chromatography–mass spectrometry. A total of 45 urinary volatile organic metabolites belonging to different chemical families were identified in the urine of the studied groups. Benzene derivatives, terpenes, and aromatics were the chemical families that contributed the most to the urinary profile of smokers. The vapers urinary volatomic pattern was also dominated by terpenes and aromatics, in addition to alcohols. The orthogonal partial least squares-discriminant analysis of the data obtained indicated that the urinary profile of vapers is more closely related to the control group, reinforcing the hypothesis of the lowest harmfulness of electronic cigarettes. Further studies recruiting a higher number of subjects are therefore necessary to consolidate the data obtained.     

电子称重技术在烟草行业中的应用与发展

自二十一世纪以来,随着我国烟草行业的全面快速发展,以及烟草行业卷烟以及烟丝等方面技术的改进,使得电子称重技术在烟草行业当中的发展作用逐渐突出。本文针对电子称重技术在烟草行业当中的应用与发展作为主要研究对象,明确电子称重技术的应用现状,并对电子皮带秤具体应用以及结构方面的内容进行分析,促进电子称重技术在烟草行业当中可持续健康发展。     

Pyrene-stacked nanostructures constructed in the recombinant tobacco mosaic virus rod scaffold

The effect of pyrenes introduced into a tobacco mosaic virus (TMV) coat protein monomer on the formation and stability of the TMV assembly was investigated. The possible arrangement of the pyrenes in the inner cavity of the TMV rod was also estimated. The pyrene derivative was introduced to four specific amino acids in the cavity of the TMV rod structure. Rod-structure formation was examined by atomic force microscopy (AFM). Two pyrene-attached mutants (positions 99 and 100) assembled to increase the length of the rod structures by 2.5 microm at pH 5.5. The interaction of the pyrene moieties in the TMV cavity was investigated by steady-state and time-resolved spectroscopic analysis. Strong excimer emission with significantly short wavelength (465 nm) was observed from the two mutants mentioned above. Excitation and UV-visible spectra indicate that the pyrene moieties form pi-stacked structures in the TMV cavity. Details of the pyrene interaction were investigated by analyzing the fluorescence lifetime of the excimer. Results suggest that the pyrenes formed preassociated rigid structures with partially overlapped geometry in the restricted space of the TMV cavity. The pyrenes effectively stabilize the TMV rod through a pi-stacking interaction in a well-ordered way, and the single pyrene moiety introduced into the monomer affects the overall formation of the TMV rod structure.     

Characterization of spectra of lignin from midribs of tobacco at THz frequencies

The functions of the chemicals are closely related with their compositions and structures.In this paper, we report the characterization of different lignin in the midribs of tobacco leaves using terahertz (THz) time-domain spectroscopy in the frequency range of 0.3 to 2 THz.These lignins are extracted from tobacco leaves grown in different regions.Lignin in midribs of tobacco leaves from the south region and the north region show distinctively different refractive indexes and absorption coefficients at THz frequency.The differences at THz range are found to be correlated with their chemical compositions, which are obtained by way of X-ray microanalysis.This clearly verifies that it is possible to employ THz time-domain spectroscopy as a tool for identifying the functions of the chemicals and analyzing their chemical compositions.     

DS18B20型数字温度传感器在烟叶烤房监测仪中的应用

文中介绍DS18B20型数字温度传感器内部结构及工作时序,给出以DS18B20和单片机为核心设计的烟叶烤房温/湿度控温度控制装置的硬件及软件设计方案.实践证明该装置的温湿度控制准确、测量精度高、控制性能良好.     

Electrochemical studies of 1,5-dihydroxynaphthalene as substrate for voltammetric enzyme immunoassay

Immunoassay is one of the biochemical analytical techniques using the specific antigen antibody com-plexation for analytical purposes. It has extensive ap-plication in clinical diagnostics, prevention and cure of diseases, and virus diagnostics. The presentation and progress of immunoassay methodology are one of the greatest achievements of bioanalytical chemistry. It is estimated that several-hundred millions of immuno-analytical determinations are carried out every year all over the world. E…     

钾离子在烟草梗丝上的吸附性能

通过静态吸附实验,研究了K^＋在烟草叶梗上的吸附性能,考察了粒径大小、pH值、温度、K^＋浓度、阴离子、共存物质等诸因素对吸附的影响。结果表明,粒径大小、pH值、温度、K^＋浓度、阴离子、共存物质对吸附均有明显影响;吸附热力学过程可用Freundlich等温吸附模型描述。     

基于技术效率的产业效率比较分析

阐述技术效率基本概念及其SFA和DEA测度方法,将技术效率引入产业效率的比较分析．在VRS条件下,产业的综合技术效率可以分解为纯技术效率和规模效率．运用DEA实证测算2002和2003年全国29个省市（自治区）烟草制品行业的技术效率,结果表明了中国烟草制品行业的纯技术效率总体上偏低是影响综合技术效率的关键因素、