构皮滩水电站烂泥沟砂石系统设计与实践

烂泥沟砂石系统是构皮滩水电站主体工程混凝土骨料加工的主要基地,共需加工混凝土骨料约600万m3,其料源为观景料场玉龙山灰岩,湿抗压强度大于50 MPa。该系统的骨料破碎筛分采用三段破碎四级筛分工艺,人工制砂采用棒磨机与立式冲击破联合制砂工艺。本文结合该系统工艺设计与施工,对系统设计中的关键技术进行了分析与总结。     

建筑意--中国雕版印刷博物馆及扬州博物馆设计

本文以中国雕版印刷博物馆及扬州博物馆设计为例，从空间意象、理水设计、造形元素等方面对特定历史条件、自然条件下的建筑创作进行了探讨。     

云台山隧道进口黄土段施工技术

从防排水、边仰坡支护、洞口加固、洞内超前支护、钢拱架锚喷联合支护等方面详细介绍了云台山隧道进口黄土段的施工技术,总结了该隧道的施工效果,强调了黄土隧道施工中防排水超前支护预注浆、施工监控的作用,积累了隧道施工经验.     

Numerical characterization of a microscale solid-oxide fuel cell

In this study, a single unit of planar micro-solid-oxide fuel cell (μSOFC) is investigated numerically to evaluate the influences of flow channel design, oxygen composition, and thermal operating conditions on cell performance. Four flow channel designs are examined under the co-flow configuration: serpentine, double serpentine, rod bundle, and oblique rib. For all designs, the contacts areas of interconnect to electrodes are kept consistent to maintain the ohmic losses at the same level. To characterize the mass transport effects, there are three different compositions, 100% O₂, 50% O₂/50% N₂ and air, fed to the cathode inlet. Different thermal conditions, adiabatic and isothermal, are applied to the outer boundary of the μSOFC and the results are compared. The outcomes suggest that both thermal conditions and oxidant composition show remarkable influences on μSOFC performance. Under adiabatic conditions, the rise of cell temperature causes a decrease in reversible voltage, deteriorating the overall cell competence. When oxygen is diluted with nitrogen, local gas diffusion becomes dominant to the cathode reaction. Bulk flow, on the other hand, plays a minor role in cell performance since there is little deviation in the polarization curves for all flow channel designs, even at high current densities. For comparison, the flow visualization technique is employed to observe the transport phenomena in various flow channel designs. The flow patterns are found to resemble the concentration distribution, providing a useful tool to design μSOFCs.     

"摩圣"技术在空气压缩机上的应用

介绍了4L-20/8型空气压缩机采用"摩圣"技术后的运行情况。"摩圣"技术在设备正常运行条件下能成功修复摩擦副的磨损,使之恢复原设计的尺寸和要求,因而提高了生产效率,取得了显著的经济效益。     

等腰梯形焊管孔型设计

在对等腰梯形焊管形状分析的基础上。精确计算了其周长，并在数学推导基础上，计算了各架次孔型尺寸，完成了等腰梯形焊管轧辊设计，使用结果表明；设计方法合理，孔型尺寸计算准确。使用效果良好。     

纳米技术的发展与市场

综述了纳米科技目前世界发展状况、发达国家争夺主导权的激烈竞争以及世界市场状况 ,叙述了纳米技术在电子信息、生物医药等各方面的应用 ,最后 ,概括介绍了纳米材料的制备方法。     

安钢高线粗中轧机导卫设计特点

介绍了安钢自行设计的高线粗中轧机导卫装置的设计原则和特点。     

微波辐射在提金活性炭技术中的应用

概述了微波辐射在提金活性发技术中的应用，将微波辐射和传统方法制备提金炭技术进行了比较，论述了微波辐射在制备提金炭及其解吸技术中的研究进展，最后对微波辐射在提金活性炭技术中的应用作了简单的展望。