Estimation of heart rate signals for mental stress assessment using neuro fuzzy technique

This paper presents the evaluation of mental stress assesment using heart-rate variability (HRV). The activity of the autonomic nervous system (ANS) is studied by means of time-frequency analysis (TFA) of the heart-rate variability signal. Spectral decomposition of the heart-rate variability before smoking and after smoking was obtained. Mental stress is accompanied by dynamic changes in ANS activity. HRV analysis is a popular tool for assessing the activities of autonomic nervous system. The approach consists of (1) monitoring of heart rate signals, (2) signal processing using wavelet transform (WT) (different wavelets), (3) neuro fuzzy evaluation techniques to provide robustness in HRV analysis, (4) monitoring the function of ANS under different stress conditions. Our experiment involves 20 physically fit persons under different times (before smoking and after smoking). Nero fuzzy technique have been used to model the experimental data.     

Synthesis,crystal structure and magnetic properties of a dinuclear dysprosium single-molecule magnet

To seek novel dysprosium based single-molecule magnets, a dinuclear dysprosium complex, namely [Dy₂(L)₂(DBM)₂(DMF)₂]·2DMF (1) was successfully obtained by employing tridentate Schiff base ligand (where H₂L = 2-hydroxy-N′’-(2-hydroxy-3-methoxybenzylidene) benzohydrazide), HDBM = dibenzoylmethane, DMF = dimethylformamide). Single-crystal X-ray structural analysis reveals that the key feature of 1 is neutral dinuclear complex, in which two Dy(III) ions with eight-coordinated environment are bridged by two phenoxido oxygen atoms from two Schiff base ligands. Interestingly, complex 1 could be regarded as the structurally related derivatives to our previous reported complex of [Dy₂(L)₂(DBM)₂(DMF)₂] (1a) but adding two guest DMF solvents. More importantly, the energy barrier to magnetic relaxation of 1 is slightly higher, with a value of 33 K, when compared to the corresponding complex 1a of 24 K, which provides a good example towards regulating magnetization dynamics in dinuclear dysprosium (III) single-molecule magnets by guest solvent molecules.     

基于AHP的煤矿本质安全管理体系评价模型及其应用

从人、机器设备、环境和管理即4M的角度,建立煤矿本质安全管理评价指标体系,在专家打分并采用层次分析法计算各评价指标权重的基础上,提出煤矿本质安全评价的模型,以便对煤矿本质安全进行量化研究,力求达到客观、真实、准确地评价煤矿企业(各部门)的本质安全管理水平。     

亚麻与天然蛋白质纤维混纺纱的开发

阐述了市场对亚麻混纺纱的开发需求，以及在棉、毛混合设备上纺制亚麻混纺纱存在的问题。亚麻纺织品凉爽，透气性好，吸湿、散湿快，挺括不贴身，强力好，且有一定的保键功能，是理想的夏季服装面料。亚麻是天然纤维中惟一的束状纤维，无天然卷曲，刚直，弹性差，抱合力差，可纺性差，较脆，易断裂，在纺纱过程中应合理选用原料和选择纺纱方法。经过多次试验，合理地制定出了各工序的主要工艺参数。     

长绒棉/羊绒混纺针织纱的开发及应用

文章阐述了开发棉、羊绒混纺纱的意义,以及在粗梳毛纺设备上纺制棉绒混纺纱存在的问题.针对棉纤维细度细、柔软、弹性差,易产生棉结的问题,在原料选用上采用了优质长绒棉和山羊绒.经过多次实验,科学、合理的制定出了各工序的主要工艺参数,并对纺纱过程中存在的技术难点--棉结问题提出了解决方案,保证混纺纱的顺利生产及成纱质量的稳定.     

休止编织法在羊绒衫生产中的应用

文章介绍了在横机成型编织过程中一种可以部分替代括针法的编织方法--休止编织法.重点介绍了休止编织法的特点、实现方法,以及在横机成型编织中的应用.     

羊绒机织产品织造过程中纱线消耗的控制

文章主要探讨了羊绒机织产品在织布车间从纱线领入到坯布转出过程中控制纱线消耗、提高织造制成率的问题,经过技术改进、创新、加强管理、转变观念,解决了整经末绞长回丝、穿综穿筘剪头、各工序扎绞、剑杆织机假边回丝及了机长回丝等在生产过程中的不合理消耗,使产品实际制成率从原来的94%提高到95.75%,节约了纱线,降低了生产成本,为企业获得了显著的经济效益.     

提高大曲培养温度对白酒总酯含量的影响

经3年多对清香型中温大曲培养温度提高4～6℃的研究。3年多的制曲和酿酒生产实践表明，不改变原生产工艺，提高大曲培养温度，可使原酒中大糙酒总酯含量由5．7g/L提高到10．2g/L；二糙酒总酯含量由3．6g/L提高到8．3g/L，而且主体香乙酸乙酯占总酯的50％以上，生产稳定；能显著提高基酒质量。     

蒙古扁桃不同极性部位对肝纤维化大鼠的保护作用及机制研究

探讨蒙古扁桃不同极性部位对四氯化碳致肝纤维化大鼠的作用及可能机制。雄性SD大鼠分为7组,每组10只。以四氯化碳建立肝纤维化大鼠模型,将成模大鼠分为模型组、水飞蓟素组(0.05 g/kg)阳性药组和蒙古扁桃石油醚、乙酸乙酯、正丁醇、水部位提取物组,同批未给四氯化碳的大鼠为正常对照组。给药8周后,测血清中的丙氨酸氨基转移酶（alanine aminotransferase,ALT）、天冬氨酸氨基转移酶（aspartate aminotransferase,AST）、碱性磷酸酶（alkaline phosphatase,ALP）活性及丙二醛（malondialdehyde,MDA）、超氧化物歧化酶（superoxide dismutase,SOD）、透明质酸（hyaluronic acid, HA）、层粘连蛋白（laminin,LN）、Ⅲ型前胶原（type Ⅲ collagen,PC-Ⅲ）和Ⅳ型胶原（type Ⅳ collagen ,Col-Ⅳ）含量并计算肝指数和脾指数;同时测肝组织中MDA、SOD、羟脯氨酸（hydroxyproline,HYP）含量及转化生成因子β1（Transforming growth factor β1 protein,TGF-β1）、Smad3（mothers against decapentaplegic homolog）和Smad7的表达。与模型组比较,蒙古扁桃药材各极性部位大鼠的体质量显著增加（P<0.05）,血清和组织中MDA显著降低（P<0.05）,血清中SOD显著升高（P<0.05）,石油醚、水部位大鼠肝指数显著降低（P<0.05）;病理学检查结果显示,蒙古扁桃药材各部位给药组大鼠肝纤维化有明显改善;蒙古扁桃石油醚部位和正丁醇部位可显著降低血清中AST、ALP、HA、PC-Ⅲ含量（P<0.05）及下调组织中HYP、TGF-β1和Smad3的水平（P<0.05）;蒙古扁桃正丁醇部位可显著降低血清中ALT含量（P<0.05）。蒙古扁桃药材石油醚、正丁醇提取物对肝纤维化有显著改善作用,是保护肝纤维化的优选活性部位,其机制可能是通过调节胶原合成异常及TGF-β1/Smad 信号通路来发挥作用。     

Method for using the blockchain to protect data privacy of IoV

With the rapid development of the Internet of Things,vehicle industry is undergoing a rapid transformation from the early vehicle Ad-Hoc network to the Internet of Vehicles (IoV) in which massive vehicles and on-board smart devices can realize data sharing and interaction.However,this brings about a big challenge for the security of shared data in a huge volume containing a lot of user privacy,especially the issues of access control,trust and key escrow.To address these problems,we propose an efficient blockchain-based distributed data sharing method in IoV.In our scheme,blockchain transactions are utilized for trustworthily data storage and access as well as user revocation.To realize end device verification,we introduce certificateless cryptography for transaction verification of blockchain nodes and the ease of the key escrow problem.Moreover,we propose an efficient partial policy-hidden CP-ABE scheme for data fine-grained access control with efficient user revocation.Security analysis and experiments demonstrate that our scheme is secure,efficient and practical.