单片机去键抖动程序的可移植性设计

对单片机中按键抖动原理进行了简单阐述,介绍了目前常用的软件和硬件消除抖动的方法,结合定时器的使用,给出了一种具有可移植性的去键抖动程序的实现思路及要点代码,为其他类似的去键抖动程序设计提供参考和借鉴。     

Injury Mechanisms of Lactic Acid Bacteria Starter Cultures During Spray Drying: A Review

Lactic acid bacteria (LAB) starter cultures can be processed by many drying techniques, among which spray drying has great potential. However, injuries of LAB during spray drying lead to a low survival rate. The microbial injuries of LAB during spray drying are specifically induced by dehydration inactivation, thermal inactivation, and balance between the two. To reduce the drying temperature, new drying techniques based on spray drying were tried; that is, low-temperature vacuum–spray drying and spray–freeze drying.     

聚丙烯腈/离子液体体系研究进展

综述了丙烯腈(AN)在离子液体中的均聚共聚、聚丙烯腈(PAN)在离子液体中的溶解机理、溶液特性以及纺丝成形的研究进展。指出以离子液体为溶剂的AN均聚和共聚反应具有反应快,聚合物相对分子质量分布窄的特点,离子液体是PAN溶解的良好溶剂;PAN/离子液体体系随温度降低呈现出可逆物理凝胶特征,PAN/离子液体具有良好的可纺性,采用干喷湿纺、静电纺丝和增塑纺丝,已制备出各种纤维;建议应进一步加强对离子液体在PAN的聚合、溶解及纺丝成形方面的研究。     

Interfacial polymerization of poly(2,5‐dimethoxyaniline) and its enhanced capacitive performances

The poly(2,5‐dimethoxyaniline) (PDMA) were synthesized through interfacial polymerization method using three various organic solvent/water reaction systems. As comparison with conventional chemical polymerized PDMA, the interfacial polymerization can produce uniform nanoparticular PDMA, especially for using high density (higher than water) solvent as organic phase. The capacitive performances of interfacial polymerized PDMA can be benefited from its uniform morphologies and loose packing structure. The specific capacitance of interfacial polymerized PDMA using carbon tetrachloride is 194 Fg^?1 at current density of 50 mA cm^?2, which has 59% enhancement over 122 Fg^?1 of conventional PDMA at the same current density. The energy density of interfacial polymerized PDMA is 39 Wh kg^?1 at current density of 5 mA cm^?2 and the power density is 28,421 W kg^?1 at current density of 50 mA cm^?2. The energy density has improvement in different extent as comparison with that of conventional PDMA. The enhanced capacitive performances can be attributed to the increased ionic conductivity induced by the loose molecular packing structure and uniform morphology produced by the interfacial polymerization process. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40666.     

On the mechanism of piezoresistivity of carbon nanotube polymer composites

Carbon nanotube (CNT) polymer composites exhibit strong nonlinear and asymmetric piezoresistivity about zero strain in tensile and compressive strain states. The existing models explain the characteristic qualitatively but not quantitatively. This paper attempts to understand the mechanisms of this piezoresistivity by developing a new 3-dimensional percolation CNT network model, where the effect of CNT deformation (wall indentation and tube bending) is considered for the first time. The predicted electrical conductivity and piezoresistivity agree with experiments quantitatively, which reveals that the CNT deformation is a dominant mechanism for the nonlinearity and asymmetry of piezoresistivity of CNT-polymer composites. Parametric studies have been conducted to show the effects of morphology and electrical properties of CNTs, work functions and Poisson's ratio of polymer on the piezoresistivity of CNT-polymer composites for future application in nanosensing composites.     

PP–R管材及专用料的研究进展

综述了无规共聚聚丙烯(PP–R)管材及专用料的研究进展,重点从加工工艺和改性方法两个方面介绍了PP–R管材的研究开发现状。分析了PP–R管材研发存在的主要问题,提出了未来几年PP–R管材及专用料的研究开发方向。     

水环境质量监测数据审核方法和技巧

水环境质量监测分析过程中水质指标多,监测数据量大,数据审核工作比较复杂,对数据审核人员的要求高。文章论述了水质监测数据审核的重要性,通过结合工作实际对各类水质监测数据的规律性、相关性进行分析,提出数据审核应注意的问题以及需掌握的技巧,为水质数据审核人员提供参考,从而提高数据质量,为环境管理服务。     

《应用电化学》教学方法的探索与实践

文章从充分调动学生主动学习的积极性、高度重视培养学生的科研素质、努力构建和实施自主研究型教学模式等三个方面,阐述了作者在《应用电化学》教学过程中对教学方法的一些探索与体会。     

储氢材料领域全球专利申请态势分析

对储氢材料技术领域专利技的全球申请态势进行了全面深入的分析,包括专利申请趋势、主要申请人、技术产出国、目标国等的分析,得知全球储氢材料整体而言,申请趋缓;主要申请人以日本为主,技术主要集中在日本,专利分布主要集中在日、美、欧、中等经济体,为有关机构和个人提供了一个宏观的研究概况,有利于全面了解储氢材料行业的整体趋势提供专利学意义上的参考。     

新型三硅氧烷表面活性剂在低能固体表面的铺展性能研究

以测试表面活性剂溶液在固体表面铺展能力的方法,研究了温度、湿度和外加电解质浓度对新型双尾三硅氧烷表面活性剂1 L溶液在石蜡等低能固体表面的铺展性能的影响,结果表明:测试铺展性能也能大致求出表面活性剂1L的临界润湿浓度(CWC);1L溶液的铺展能力是随着温度和湿度的升高而增强的;较低的外加电解质浓度有助于提高1L溶液的铺展性能。实验说明,表面活性剂1L作为润湿剂或铺展剂使用时可以选择在较高的温度和(或)湿度下使用,以及(或者)通过添加适量的电解质的方法来提升其铺展能力,而且使用的浓度应该要在其CWC以上。