A novel process for comprehensive utilization of vanadium slag

Traditional processes for treating vanadium slag generate a huge volume of solid residue and a large amount of harmful gas, which cause serious environmental problems. In this study, a new process for the comprehensive utilization of vanadium slag was proposed, wherein zeolite A and a V₂O₅/TiO₂ system were synthesized. The structural properties of the as-synthesized zeolite A and the V₂O₅/TiO₂ system were characterized using various experimental techniques, including X-ray diffraction, X-ray fluorescence, scanning electron microscopy, and infrared spectroscopy. The results reveal that zeolite A and the V₂O₅/TiO₂ system are successfully obtained with high purity. The results of gas adsorption measurements indicate that the prepared zeolite A exhibits high selectivity for CO₂ over N₂ and is a candidate material for CO₂ capture from flue-gas streams.     

循环热处理及形变对TC17钛合金片层组织球化和取向的影响

将循环热处理与形变相结合,利用电子背散射衍射等手段探究该工艺对TC17钛合金片层组织球化和取向的影响.结果表明:TC17钛合金在两相区进行单纯的循环热处理其片层组织球化程度有限,而经过循环热处理+压缩变形后,其魏氏组织消失,片层α相得到明显球化,但是其取向均匀性仍没发生较大变化.此外,变形中两相的再结晶速度及其强韧性导致了两相取向的差异性.α相的再结晶速度快于β相,在变形过程中,α相的各向异性首先降低;另一方面,由于α相比β相硬度高,热变形过程中,α相的变形程度小于β相,应变主要集中在与α相邻近的较软的β相,从而导致α相的取向均匀性高于β相.     

Effects of mechanical strain amplitude on the isothermal fatigue behavior of H13

Isothermal fatigue (IF) tests were performed on H13 tool steel subjected to three different mechanical strain amplitudes at a constant temperature to determine the effects of mechanical strain amplitude on the microstructure of the steel samples. The samples' extent of damage after IF tests was compared by observation of their cracks and calculation of their damage parameters. Optical microscopy (OM) and scanning electron microscopy (SEM) were used to observe the microstructure of the samples. Cracks were observed to initiate at the surface because the strains and stresses there were the largest during thermal cycling. Mechanical strain accelerated the damage and softening of the steel. A larger mechanical strain caused greater deformation of the steel, which made the precipitated carbides easier to gather and grow along the deformation direction, possibly resulting in softening of the material or the initiation of cracks.     

架空线路耐张杆塔上使用硅橡胶复合绝缘子设计探讨

硅橡胶复合绝缘子自上世纪九十年代开始，已经陆续广泛应用在高压送电线路杆塔上了，但是主要还是应用在直线杆塔上作为悬垂串使用。而对于耐张转角杆塔上的应用主要还是传统的瓷、玻璃绝缘子。本文通过作者的分析，希望对这个问题做更深一步的探讨。     

日英表达方位的虚词比较分析

日语和英语中,虚词的使用方法都比较难以掌握。通过对比这两种语言中表达方位的虚词的基本使用方法,可以找出一些相对而言具有规律性的表达方式,对于从事学习这两种语言的人而言,能够起到一些参考作用。     

(Fe1-x Nx)4N晶体结构和磁性的第一性原理分析

运用第一性原理全势线性缀加平面波方法研究了反钙钛矿结构 (Fe_1-x N_x)₄N化合物的结构和磁性质.计算了化合物晶格常数随Ni含量的变化关系；总能的计算表明镍原子优先占据角点位；结合能的计算结果显示随镍含量的增加化合物的相稳定性先上升后下降，在镍含量达到25%时化合物呈最稳定相，在镍含量大于75%后不会形成稳定相，这些结果均与实验结果一致.讨论了不同交换关联势对化合物磁矩计算结果的影响.     

国内外羊毛西装面料加工性能的比较

选择35种国内外羊毛西装面料,利用FAST仪对其加工性能进行测试,运用主成分分析方法对其差距与缝纫质量进行比较.结果表明,国内外毛西装面料的主要差异是可成型性,其他依次为湿膨胀性、厚重性、松驰回缩性等.这些差距表明国外毛西装面料加工时制作难度小,尺寸稳定性好,缝纫缩皱较轻,而国内面料制作难度大,缝纫缩皱严重.     

汉英数字谚语翻译比较研究

对比汉语谚语数字与英语数字在喻义方面的差异,探讨如何处理汉英谚语数字翻译相应的文化空缺现象。汉英数字在谚语中的语义文化空缺失去了原文数字的结构和比喻形象。译出喻义,以保证传递原文的基本信息。     

互换性与技术测量课程实验教学探索

实验教学作为高等学校实践教学的重要组成部分,是培养学生创新意识和实践能力的重要途径。文章针对传统的互换性与技术测量课程实验的教学,突破传统的实验教学模式,大胆改革创新,同时引入比较性实验教学方法。该方法为培养应用性和实用性人才,也可为满足市场人才的需要奠定良好的基础。     

短肢剪力墙力学分析模型对比及其选择

详细论述了短肢剪力墙这一新型结构体系目前常见的几种结构计算分析模型及其适用性,然后选用不同的分析模型和分析方法对同一个结构进行计算,通过算例分析和比较不同模型计算结果存在差异的原因,最后提出了一些合理选取短肢剪力墙力学分析模型的适用性建议。