原位固化法高效合成ZnO/环氧树脂纳米复合材料

ZnO纳米颗粒可以明显提高固化后环氧树脂的性能.本研究制备了ZnO量子点/环氧树脂复合材料,环氧树脂使用聚酰胺固化剂,在低温下短时间固化.合成过程中,使用正己烷取代丙酮作为溶剂,从而提高复合材料的机械性能.随后,使用紫外-可见透过光谱、荧光发射光谱和硬度等研究了不同制备工艺下ZnO/环氧树脂复合材料的光学性能和机械性能.结果表明,通过原位固化法将ZnO量子点与聚酰胺固化剂混合得到复合固化剂,将树脂与该固化剂混合后,可以在低温下固化得到具有较好机械性能和光学性能的ZnO/环氧树脂纳米复合材料.     

深度学习视域下的高中物理教学探研

深度学习是一种能够促进学生对知识理解和应用的新兴模式。在高中物理教学中,引入深度学习模式,能够改善学生的学习现状,培养学生的学习能力,提高教学效率和教学质量,提升学生的物理核心素养。文章结合教学实践,对深度学习视域下的高中物理教学进行探研。     

甘肃省重点实验室科技创新绩效分析及发展思考

针对甘肃科技发展特点,设计指标体系,对甘肃省重点实验室的建设规模、地域和技术领域分布、研究人员素质、科技基础设施和设备等进行了调查,对重点实验室创新性研究成果和自主知识产权、科技创新及成果转化能力、科技创新人才培养及团队建设等创新绩效进行了分析,提出了甘肃省重点实验室发展的建议,为今后甘肃省重点实验室的发展规划提供参考和借鉴.     

小麦属的分类

 In the present paper, an brief historical account and the comments on the modern taxonomic systems of the genus Triticum L. are made. The author suggests that principles to determine a species be (1) a special type of genome, and (2) reproductive isolation. The principles to determine a subspecies are the special co-type of genome and incomplete reproductive isolation. There are no differences on the level of genome constitution and no reproductive isolation between the varieties or concultivars. According to these principles, the author schemes a taxonomic system of the genus Triticum L. based on biosystematics as follows:      Triticum monococcum L. sensu lat.        subsp. boeoticum (Boiss.) Yen, st. nov.           var. thaoudar (Reut ) Flaksb.           concv. Einkhorn        subsp. urartu (Tum.)Vap.      T. timopheevi Zhuk. sensu lat.           var. araraticum (Jakubz.) Yen, st. nov.      T. zhukovskyi Men. et Er.      T. turgidum L. sensu lat.           var. dicoccoides (Körn. in litt. in Schweinf.) Bowden           concv. (1) Emmer, (2) Durum wheat, (3) Rivet wheat, (4) Polish wheat, (5) Persian wheat.      T. aestivum L. sensu lat.           concv. (1) Tibetian weed wheat, (2) Spelt, (3) Vavilov wheat, (4)  Macha wheat, (5) Yunnan hulled wheat, (6) Winter common wheat, (7) Spring common wheat, (8) Branch-eared wheat, (9) Club wheat, (I0) Indian dwarf wheat, (11) Xinjiang ricewheat.     

中国经济增长、能源消费与碳排放之间的关系研究

基于ARDL协整分析方法,分析了1965—2007年中国的经济增长、能源消费和碳排放之间的关系,结果表明,三者之间具有长期协整关系,在长期和短期内CO2排放对于经济增长都具有显著的正向影响作用。根据Grange因果关系检验的结果,能源消费是CO2排放的主要原因,而CO2排放增加又会促进经济的增长,为了降低CO2的排放量,一方面需要牺牲一定程度的经济增长,一方面需要提高现有能源的利用效率,积极寻找现有能源的替代资源。     

Multi-lagged-input iterative dynamic linearization based data-driven adaptive iterative learning control

This article presents a multi-lagged-input based data-driven adaptive iterative learning control (M-DDAILC) method for nonlinear multiple-input-multiple-output (MIMO) systems by virtue of multi-lagged-input iterative dynamic linearization (IDL). The original nonlinear and non-affine MIMO system is equivalently transformed into a linear input-output incremental counterpart without loss of dynamics. The proposed learning law utilizes the desired trajectory to cancel the influence from iteration-by-iteration variations, as well as additional multi-lagged inputs to improve control performance. The developed iterative estimation law is more effective and also makes estimation of the unknown parameters easier because the dynamics for each parameter to represent are decreased by dividing the system into multiple components in the multi-lagged-input IDL formulation. Moreover, the proposed M-DDAILC does not need an explicit and accurate model. It is proved to be iteratively convergent with rigorous analysis. Both a numerical example and a practical application to a permanent magnet linear motor are provided to verify the validity and applicability of the proposed method.     

跨语言文献检索系统研究

[目的/意义]旨在探讨解决原英日文献检索分析中存在的不足,实现以中文为检索语言的中、英、日文献资源的统一检索。[方法/过程]介绍了一种通过机器翻译技术实现以中文为检索语言的中日英文献资源的统一检索系统。[结果/结论]该系统基于MASH-UP技术将检索结果整合进行统一的内容分析,帮助用户跨越语言的障碍,方便地查询和使用外文文献。     

武汉城市圈产业结构转换能力比较分析——基于“两型社会”的视角

两型社会建设给武汉城市圈提出了新要求,各地应形成资源节约利用、环境负面影响小的产业结构。文章以此为目标,构建了产业结构转换能力指标体系,运用因子分析法分析了武汉城市圈九个城市由传统产业向＂两型产业＂的转换能力,并对各城市＂两型产业＂的转换速度进行了比较,结果表明武汉城市圈各产业发展现状离＂两型产业＂还有一段距离,各城市在产业转换能力和转换速度方面都有待进一步加强。