钢连梁带缝剪力墙结构的研究

提高连系梁的延性是改善剪力墙结构搞震性能的关键．以钢连梁代替现有的带缝混凝土连梁的新结构，能更好保证其设计破坏荷载，减少施工困难，有效地作为地震能耗能机构．     

新型组合钢连梁抗震性能研究

通过含有钢筋混凝土连梁、钢连梁与新型组合钢连梁的结构进行试验对比,利用ANSYS软件建立试验模型,进行模拟试验分析,研究新型组合钢连梁在弹性状态下的抗震性能。试验结果表明:小跨高比连梁采用新型组合钢连梁具有明显的减振效果,抗震性能好,适宜剪力墙结构采用。     

具线性耦合非线性网络的完全同步

通过讨论一类具线性耦合项的非线性网络，在耦合矩阵是对称的Laplacian矩阵的情形下，利用某种二次型是半负定的条件，构造该网络的完全同步．     

含耦合电感电路的网孔分析法初探

将网孔分析法用于含耦合电感电路,其结果和通常所用的网孔分析法相同,且较为简便.     

基于多孔介质湿热迁移的混凝土收缩数值模拟

为了对处于环境温、湿度中的混凝土的收缩变形进行有效数值模拟分析,提出了一种数值解析与有限元分析相结合的方法.根据多孔介质热质传输原理描述混凝土中湿热迁移过程的耦合偏微分方程组,借助Laplace变换及传递函数将其简化为拉氏域内的简单微分方程并求解,然后通过Laplace逆变换得到物理空间内的温度和含湿量.在此基础上利用有限元分析方法得到混凝土湿热耦合收缩变形.该方法克服了其他求解过程中特征值复杂、耦合困难及准确性差的问题,并有效解决了现有有限元软件难以处理湿度应力及变形的难题.以Hundt试验为算例的数值计算表明,模拟结果与试验数据具有良好的相关性.     

Probing of coupling effect induced plasmonic charge accumulation for water oxidation

A key issue for redox reactions in plasmon-induced photocatalysis, particularly for water oxidation, is the concentration of surface-accumulating charges (electrons or holes) at a reaction site for artificial photosynthesis. However, where plasmonic charge accumulated at a catalyst''s surface, and how to improve local charge density at active sites, remains unknown because it is difficult to identify the exact spatial location and local density of the plasmon-induced charge, particularly with regard to holes. Herein, we show that at the single particle level, plasmon-coupling-induced holes can be greatly accumulated at the plasmonic Au nanoparticle dimer/TiO₂ interface in the nanogap region, as directly evidenced by the locally enhanced surface photovoltage. Such an accumulation of plasmonic holes can significantly accelerate the water oxidation reaction (multi-holes involved) at the interfacial reaction site, with nearly one order of magnitude enhancement in photocatalytic activities compared to those of highly dispersed Au nanoparticles on TiO₂. Combining Kelvin probe force microscopy and theoretical simulation, we further clarified that the local accumulated hole density is proportional to the square of the local near-field enhancement. Our findings advance the understanding of how charges spatially distribute in plasmonic systems and the specific role that local charge density at reaction sites plays in plasmonic photocatalysis.     

基于专利分析的我国纳米光电产业技术发展研究

对纳米光电产业技术进行概述,并简要介绍美、日、欧在纳米光电产业的布局。基于专利分析,从专利总体态势、技术生命周期、热点技术领域、专利地区分布和重点研究机构等角度,对我国纳米光电产业技术展开深入研究。最后,基于分析结果总结我国纳米光电产业技术的发展现状及研究热点。     

知识图谱中矩阵生成研究*

将知识图谱方法分为5类：同被引分析、耦合分析、共词分析、合作分析和直接引用分析。用图形展示文献实体之间的这五种关系,并详细分析这些关系的定义。构建关系矩阵是知识图谱分析的关键步骤之一,详细叙述了这5类关系矩阵的生成步骤,供使用知识图谱方法的相关学者参考。     

Acquiring an Attacking Forehand Drive: The Effects of Static and Dynamic Environmental Conditions

Abstract

Two groups of 10 novice subjects each were trained to perform attacking forehand drives in table tennis and land the balls as fast and as accurately as possible onto a target on the opposite side of the net under two different training conditions. Under the static training condition, the balls were to be struck from a constant position, and under the dynamic training condition, balls approached the subjects in a normal way. Both groups were tested under dynamic conditions prior to and after four days of training, during which they received 1,600 practice trials. Both groups of subjects were shown to increase the number of balls that landed on the target, and learning was also evident from an increased consistency of the direction of travel of the bat at the moment of ball/bat contact. However, no increase in consistency was found for the location of the bat at the moment of ball/bat contact and for the movement times. Thus, learning can occur in the absence of externally generated time-to-contact information, but this is not due to the establishment of a consistent movement form. Learning appears to progress from control at the moment of ball/bat contact backward, toward the moment of initiation.     

基于SOA的高校数字化校园构建

介绍数字化校园、SOA及Web Service等理论和技术,提出基于SOA的高校数字化校园平台的构建方案,给出实现这种方案的方法,为高校数字化校园信息平台的构建提供理论依据和实践基础。