450mm热连轧机组轧制带钢拓宽分析

讨论了邯郸钢铁公司一轧厂450mm热连轧带钢的拓宽问题；对该机组及其φ500mm开坯机进行了现场测试，并在计算机上进行了带钢拓宽模拟轧制，得出了该机组的最大轧制负荷及其带钢的拓宽限度。     

Preparation and CO gas-sensing behavior of Au-doped SnO2 sensors

A study on the low-temperature CO gas sensors based on Au/SnO₂ thick film was reported. Au/SnO₂ powders, with different Au loading from 0.36 to 3.57 wt%, were prepared by a deposition-precipitation method. Thick films were fabricated from Au/SnO₂ powders. The Au/SnO₂ thick-film sensors exhibited high sensitivity to CO gas at relatively low operating temperature (83-210 °C). We also reported the effect of the Au loading in Au/SnO₂ on the CO gas sensing behavior. The optimal Au loading in as-prepared Au/SnO₂ was 2.86 wt%.     

基于生态理论的城市步行系统研究——以武汉市江岸区为例

步行系统是城市交通的组成部分,它的建设必然提高人的通行速度,缓解交通拥堵,提高城市服务容量和服务水平,满足更多人的交通需求。本文意在通过引用景观生态学的＂源、汇、流＂理论,以武汉市江岸区江汉路步行街及周边区域为研究对象,通过调查和研究,发现问题,剖析原因,详细探讨源汇流理论在步行系统设计中的应用,从而完善其城市步行交通系统,缓解城市中人与自然、人与社会、人与人之间的矛盾。     

Comparative Study on Catalytic Performances for Low-temperature CO Oxidation of Cu–Ce–O and Cu–Co–Ce–O Catalysts

Two series of Cu–Ce–O and Cu–Co–Ce–O catalysts were prepared by co-precipitation method. The prepared catalysts were characterized by XRD, IR, TPR, XPS, BET and ICP-AES. The catalytic activities of the catalysts for low-temperature CO oxidation were evaluated through a microreactor-GC system. TPR results indicate that the addition of cobalt to the Cu–Ce–O can increase the dispersion of copper oxide, and the interaction between cobalt and copper can enhance the reducibility of each other. XPS analysis show that Ce⁴⁺, Cu²⁺, along with Co₃O₄, are present on the surface of Cu_0.4Co_0.6Ce₄ catalyst. The Co/Cu atomic ratio and the calcination temperature have significant effect on the activities of the catalysts. Compared with Cu₁Ce₄ catalyst, the Cu_0.4Co_0.6Ce₄ catalyst has better activity and thermal stability.     

风力发电齿轮箱设计制造技术的发展与展望

概括描述了世界风力发电的现状及发展趋势;阐述了大型风电增速齿轮箱的设计制造关键技术,介绍了ANSI6006标准的主要内容;分析了我国大型风力发电增速齿轮箱设计制造技术的现状、存在问题及发展前景.     

徽商银行总部基地建设项目超高层结构设计

徽商银行总部基地主塔楼结构高度为179.1m,采用了局部高位斜撑转换的钢筋混凝土框架-核心筒结构体系。主要介绍工程的特点与结构体系的选择,针对结构的超限情况提出相应的抗震措施,以确保整体结构设计的安全可靠和经济合理。采用SATWE和MIDAS Building软件对结构进行小震弹性反应谱比较分析和弹性时程分析以及中震作用下主要竖向构件的验算;此外,在大震作用下对结构进行静力弹塑性、动力弹塑性分析,分析结果均满足设定的抗震性能目标要求。     

Cover Image,Volume 98, Issue 6

The cover image, by Jian Wang et al., is based on the Research Article Low‐molecular‐weight glutenin subunits from the 1U genome of Aegilops umbellulata confer superior dough rheological properties and improve breadmaking quality of bread wheat, DOI: 10.1002/jsfa.8700 .

     

活性炭纤维纸的抄造技术研究

活性炭纤维纸是一种新型的特种纸。本文对该种纸的抄造方法进行了分析和提出技术要点。     

粘弹性基础上粘弹性矩形厚板的固有横振

由于各向同性粘弹性的剪应力一角应变及挤压应力一挤压应变的本构关系与应力一应变的本构关系相似,据此,在线性粘弹性范围内,建立了适合于各种粘弹性基础上粘弹性矩形厚板的普遍动力学方程,从而得到了Kelvin基础上Van DerPod模型矩形厚板的固有频率解析式.     

Synthesis and catalytic performance of gold-loaded TiO2 nanofibers

Organic modification of sol–gel catalytic glassy electrodes made of a thin layer of organosilica doped with nitroxyl radical TEMPO (2,2,6,6-tetramethyl-1-piperidinyloxy) crucially enhances stability in the waste-free oxidation of alcohols to carbonyls in water. Structural comparison between analogous films made of organosilica and unmodified SiO₂ shows that the origin of the pronounced stable activity of the ORMOSIL film lies in high hydrophobic and also in the pronounced low degree of hydrophilicity. This article is dedicated to the memory of professor Angelo Patricolo, great Italian neurosurgerist and fine gentleman from Sicily