Date palm fiber(DPF)and kenaf fiber were reinforced in epoxy having various fiber loading 40%,50%,and 60%by weight.These hybrid samples were manufactured by hot press technique and then characterized for tensile,impac...Date palm fiber(DPF)and kenaf fiber were reinforced in epoxy having various fiber loading 40%,50%,and 60%by weight.These hybrid samples were manufactured by hot press technique and then characterized for tensile,impact,and morphological behavior to evaluate the ratio of fibers in the hybrid composites;the addition of kenaf improved the tensile properties,Scanning Electron Microscopy(SEM)revealed the interfacial bonding of fiber/matrix,and dispersion and void content in composites.Impact test studies reflected the effect of natural fiber with epoxy,level of stress transfer from matrix to reinforced material,and reinforced material’s role in absorbing the impacts.It showed that 50%of DPF had the best shock-absorbing capacity.The obtained results indicated that 30%DPF in hybrid composite showed improved tensile properties and homogeneous distribution of fiber without void content;however,50%DPF loading in hybrid composites had the best impact properties.展开更多
针对科学知识普及的途径单一、传播程度不够深入,图书馆文献信息的传播缓慢等问题,提出了基于移动互联网的掌上科普电子图书馆设计思路。在分析前端本地存储技术和个性化推荐技术的基础上,采用HTML5 local Storage持久化存储技术,实现...针对科学知识普及的途径单一、传播程度不够深入,图书馆文献信息的传播缓慢等问题,提出了基于移动互联网的掌上科普电子图书馆设计思路。在分析前端本地存储技术和个性化推荐技术的基础上,采用HTML5 local Storage持久化存储技术,实现了搜索历史记录、书架路径数据的持久化存储。采用基于空间向量的个性化推荐技术实现了科普书籍精准推荐。该应用用户体验好,为科普知识的高效传播提供了一种新的途径。展开更多
文摘Date palm fiber(DPF)and kenaf fiber were reinforced in epoxy having various fiber loading 40%,50%,and 60%by weight.These hybrid samples were manufactured by hot press technique and then characterized for tensile,impact,and morphological behavior to evaluate the ratio of fibers in the hybrid composites;the addition of kenaf improved the tensile properties,Scanning Electron Microscopy(SEM)revealed the interfacial bonding of fiber/matrix,and dispersion and void content in composites.Impact test studies reflected the effect of natural fiber with epoxy,level of stress transfer from matrix to reinforced material,and reinforced material’s role in absorbing the impacts.It showed that 50%of DPF had the best shock-absorbing capacity.The obtained results indicated that 30%DPF in hybrid composite showed improved tensile properties and homogeneous distribution of fiber without void content;however,50%DPF loading in hybrid composites had the best impact properties.
文摘针对科学知识普及的途径单一、传播程度不够深入,图书馆文献信息的传播缓慢等问题,提出了基于移动互联网的掌上科普电子图书馆设计思路。在分析前端本地存储技术和个性化推荐技术的基础上,采用HTML5 local Storage持久化存储技术,实现了搜索历史记录、书架路径数据的持久化存储。采用基于空间向量的个性化推荐技术实现了科普书籍精准推荐。该应用用户体验好,为科普知识的高效传播提供了一种新的途径。
