浴池FRP综合加固法精细化施工探析

从检测报告入手,分析了浴池裂缝产生的原因,提出了浴池FRP综合加固法,并对其施工工艺作了进一步细化完善,经应用表明,该精细化施工取得了良好的效果,社会效益和经济效益显著。     

ZnSnO_3-SnO_2纳米片分级结构的自组装及气敏特性(英文)

通过一个简单的水热方法成功地合成出由SnO2纳米片作次级结构的新型花状ZnSnO3-SnO2分级纳米结构。ZnSnO3多面体在生长分级SnO2纳米片的过程中主要起模版作用,制备出的SnO2纳米片的厚度约为25nm。还讨论了ZnSnO3-SnO2样品的形貌随反应时间变化的规律,并且进一步讨论了形成这种分级结构的形成机制。此外,由这种新型ZnSnO3-SnO2纳米结构作敏感材料的气体传感器对乙醇气体具有高灵敏和快响应的特点。ZnSnO3-SnO2纳米片在最佳工作温度270°C时,对50×10-6乙醇气体的灵敏度约为27.8,其响应和恢复时间分别在1s和1.8s内。     

B_2型Fe－Al合金键结构及脆性的电子理论研究

应用余氏理论，对不同Ａｌ含量的富Ｆｅ区Ｆｅ－Ａｌ无序固溶体进行价电子结构计算和分析，从理论上探讨了Ａｌ含量对合金晶格常数、原子磁矩、塑性以及晶体内原子状态的影响。研究发现，Ｆｅ－Ａｌ无序固溶体的晶格常数、原子磁矩和塑性随含Ａｌ量的变化，是由于合金中Ｆｅ、Ａｌ原子之间相互作用导致原子状态发生变化的结果。     

基于VRML&ArcGIS的虚拟城市的实现

目前虚拟城市的建设在城市平面图的快速获取方面存在一定的难度.本文研究了VRML虚拟现实建模语言,利用ArcGIS快速制作的平面图,通过VRML和JavaScript创建了虚拟图书馆,为未来建立虚拟城市提供了一些指导建议.     

Reactive magnetron sputtering of germanium carbide films at different substrate temperature

To explore the relationship between the chemical bonding and mechanical properties for germanium carbide (Ge1-xCx) films,the Ge1-xCx films are prepared via reactive magnetron sputtering in a mixture of CH4/Ar discharge,and their composition,chemical bonding and hardness were investigated as a function of substrate temperature (Ts). The results show that Ts remarkably influences the chemical bonding of Ge1-xCx film,which results in a pronounced change in the film hardness. As Ts increases from ambient (60 ℃) to 500 ℃,the Ge content in the film gradually increases,which promotes forming sp3 C-Ge bonds in the film at the expense of sp2C-C bonds. Furthermore,it is found that with increasing Ts the fraction of C-H bonds in Ge1-xCx film gradually decreases,which is attributed to an enhancement in the desorption rate of C-Hn(n=1,2,3) species decomposed from methane. The transition from graphite-like sp2 C-C to diamond-like sp3C-Ge bonds as well as the reduction in C-H bonds in the film with increasing Ts promotes forming the compact three-dimensional network structure,which significantly enhances the hardness of the film from 5.8 to 10.1 GPa.     

钙钛矿锰氧化物Y0.5Ca0.5Mn0.8Fe0.2O3的电子顺磁共振研究

用固相反应法制备了Y0．5Ca0．5Mn0．8Fe0．2O3多晶陶瓷材料，借助电子顺磁共振技术对多晶样品在150—300K温度范围内的顺磁共振行为进行了研究。结果表明样品的顺磁共振线宽△Hpp和g因子的值随着温度的降低是增加的。线宽的增加是由于随着温度的降低，样品进入一个长程的反铁磁态，体系的铁磁关联增强导致的。g因子随温度的降低而增加表明体系的轨道有序是逐渐增强的。     

BaTiO3/SrTiO3超晶格的微结构研究

本实验研究利用激光分子束外延法（L－MBE）研究在SrTiO3(STO)(001)基片上生长的BaTiO3(BTO)/SrTiO3(STO)超晶格的微结构,利用小角X射线衍射光谱（SAXRD）的计算机模拟来获得BaTiO3/Sr-TiO3超晶格的微结构参数,如：总的膜厚度,超晶格周期,表面和界面的均方根粗糙度等。实验结果表明超晶格的表面和界面非常平整,均方根粗糙度大约为0.2nm,原子力显微镜（AFM）的实验研究已经证明了超晶格结构的平滑程度,超晶格的＜001＞方向存在着微弱的关联现象。     

Structure and magnetic properties of columnar Fe-N thin films deposited by direct current magnetron sputtering

Columnar Fe-N thin films with thickness ranging from 30 to 150 nm were deposited by direct current magnetron sputtering using an Ar/N2 gas mixture (V(N2)/V(N2+Ar)=5%) on corning glass substrates. The structure, surface morphology and magnetic properties were investigated using X-ray diffractometry(XRD), scanning electron microscopy, atomic force microscopy, transmission electron microscopy(TEM) and superconducting quantum interference magnetometry. XRD investigation shows that Fe-N films exhibit amorphous-like structures; however, TEM measurements indicate the synthesis of mixture phases of α-Fe+ζ-Fe2N+ε-Fe3N in these films. The magnetic anisotropy and coercivity of Fe-N thin films exhibit strong dependence on the film growth behavior and surface morphology. With increasing the height of Fe-N films with column structures, the coercivity increases from 7.96 kA/m to 22.28 kA/m in the direction parallel to the film surface. In perpendicular direction the coercivity only increases slightly from 39.79 kA/m to 43.77 kA/m. However, the values of anisotropy field increase from 0.79×106 to 1.44×106 A/m, which is mainly attributed to the shape anisotropy of elongated columns due to the fact that the difference of magneto-crystalline anisotropy among these Fe-N films is small. The saturation magnetizations of Fe-N films vary with increasing film thickness from 23.5 to 85.1 A-m2/kg.     

皮艇计算机测试系统研究

本文采用液压系统作阻力源，利用微机数值采集及软件分析研制了一套皮艇等动模拟测试系统。通过该系统能够模拟皮艇技术动作，测试皮艇运动员的运动技术参数，以评价和改进运动员的技术动作，对提高运动成绩是十分有效的测试和训练器械。     

磁控溅射参数对CNx薄膜成分,化学结合状态和硬度的影响

应用直流非平衡磁控溅射系统在不同实验条件下制备了ＣＮｘ薄膜材料，其最大氮原子百分含量为３７％，通过傅里叶变换红外光变。Ｘ光光电子能谱以及显微压痕法的测量和分析，对得到的ＣＮｘ薄膜材料中的原子化学结合状态，硬度等性质进行了表征。