Surface treatments applied to titanium and its alloys for implant applications are important for the development of bio properties.In this study,first an oxide layer was formed on the surface of the titanium plate by micro arc oxidation,and then both calc
Natural biopolymers have excellent biocompatibility and biodegradability;they can be used as biomedical materials for wound healing.In this work,the Silk Fibroin(SF)and K-carrageenan(κ-Car)composite films containing Zinc-doped Bioac-tive Glass(ZBG)have be
The study aimed to develop efficient techniques with different novel graft structures to enhance the treatment of acetabular bone deficiency.The inhomogeneous material properties Finite Element Analysis(FEA)model was reconstructed according to computed to
Significant progress has been made on understanding the critical role of organic components in directing the collagen mineralization.We hypothesize that the inorganic trace elements might also play important role in the mineralization of collagenous matri
Polylactic acid(PLA)possesses good mechanical and biodegradability properties which make it a suitable material for polymer composites whereas brittleness and high costs limit its utilization in various applications.The reinforcement of natural fibres wit
目的 通过高通量平台筛选差异表达基因间的相互联系和其相互作用的途径.方法 从高通量基因表达数据库(GEO)下载原始数据,比较非小细胞肺癌患者与健康样本的基因表达谱,确定差异表达基因(Differential Gene Expression,DEGs)和差异表达的microRNAs(DEMs).随后利用GeneSpring软件筛选了DEGs,并进行基因本体论(GO)和关键基因和基因组百科库(KEGG)通路富集分析.结果 共筛选出460个DEGs和25个DEMs,其中,CCNB1、CDK1、CDC45、CCN
The anthropomorphic intelligence of autonomous driving has been a research hotspot in the world.However,current stud-ies have not been able to reveal the mechanism of drivers\'natural driving behaviors.Therefore,this thesis starts from the perspective o
针对近场通信在移动支付、隐私认证、物流溯源等领域的广泛应用,设计了资源约束的物理访问控制系统,该系统在硬件上主要由接入点、控制器、访问控制服务器和近场通信终端组成,在应用软件上主要由安全传输协议层和应用协议数据单元层组成,基于以上软硬件构建的物理访问控制系统在原型机测试中能够达到0.2 s左右的接入性能,为进一步研究近场通信在保护用户数据信息上的作用奠定了基础.
空间想象能力,是指“人对头脑中所形成的空间表象进行加工、改组,从而创立新思想、新形象的能力”[1],是“人们对客观事物的空间形式进行观察、分析和抽象思维的能力”.这种能力的特点是在头脑中构成研究对象的空间形状和简明的结构,并能将对事物所进行的一些操作,在头脑中作相应的思考.前苏联著名数学家柯尔莫戈洛夫对空间想象能力的作用有这样的看法:“只要有可能,数学家总是尽力把他们正在研究的问题从几何上视觉化,几何想象或如同平常人们所说的几何直觉,对于几乎所有数学分科的研究工作,甚至于最抽象的工作都有着重大的意义”[2