鲁地拉水电站进水口通气管制作安装施工技术

鲁地拉水电站进水口坝段通气钢管直径较大，安装难度大，本文详细的介绍了通气钢管制作及安装方法，值得其他类似工程借鉴。     

电子商务安全的研究分析

本文主要介绍了电子商务的安全目标，并重点介绍电子商务安全性的实现。     

软岩巷道局部欠支护效应分析

以弹性及粘弹性理论为基础研究巷道的局部欠支护效应，阐述底臌与顶，帮失稳相互诱发的要理，为支护结构设计提供了新的理论依据。     

宽带给电信企业价值链带来的变革

本文分析了宽带消费给电信企业价值链带来的变革,指出宽带企业价值链已经由以生产为中心的业务导向型转变为以产品为中心的消费者导向型,并在此基础上为电信运营商的宽带产品价值链建设提出了一些策略。     

混凝土保护层剥落的原因分析及处理方法

通过对该工程框架梁、柱保护层自然破损、掉块现象的分析，认为混凝土碳化是导致结构受损的主要原因；并提出了梁柱的修复方法。     

网壳锚喷支护结构试验研究

网壳锚喷支护是钢筋网锚喷支护的新发展，它将地面大跨度网壳结构与地下锚喷结构结合起来，使支护系统对围岩的内部加固、外部支撑、柔性让压三种能力得到加强，其结构形式、设计理论都有一定创新，通过室内试验，取得良好效果。     

梯子洞水电站工程砂石骨料生产系统监理

梯子洞水电站工程由于施工区地理环境限制,人工砂石骨料生产系统未能按原规划规模设计建造,且配套设施和相关环节又未满足系统要求,造成骨料供需矛盾突出,影响混凝土施工进度和质量.长江委监理人员针对存在的问题,积极、主动地协调各方关系,组织参建单位技术人员群策群力,克服各种困难,最终使砂石骨料生产满足了混凝土施工进度要求,保证了混凝土施工质量,确保了乌电集团公司提出的"提前4个月并网发电"总工期目标的实现.     

再生微粉对超高性能混凝土力学性能和微观结构的影响

研究了两种类型的再生微粉(混凝土粉和砖粉)取代部分硅灰对超高性能混凝土(Ultra-high Performance Concrete,UHPC)力学性能和微观结构的影响.结果表明:混凝土粉的掺入降低了UHPC的力学性能,而砖粉取代15％硅灰时,UHPC的28 d抗压强度和抗折强度分别达到了130 MPa和24 MPa...     

瓦斯蓄热氧化装置烟气循环利用模拟研究

为了提高瓦斯蓄热氧化装置的热效率,将其排放的高温烟气送至该装置入口,并与入口原料气掺混,充分利用烟气余热提高装置入口瓦斯温度。对瓦斯蓄热氧化装置高温烟气循环利用过程进行模拟计算,分析其对蓄热氧化过程的影响。模拟研究结果表明：烟气循环不但没有降低蓄热氧化装置的安全性,而且还可增加该装置输出高温烟气的流量和热量,并可减少装置的气体排放量。     

Hydrogen cold plasma for synthesizing Pd/C catalysts: the effect of support-metal ion interaction

It has been found that cold plasma is a facile and environmentally benign method for synthesizing supported metal catalysts, and great efforts have been devoted to enlarging its applications. However, little work has been done to disclose the influence mechanism, which is significant for controllable synthesis. In this work, hydrogen cold plasma was adopted to synthesize a palladium catalyst supported on activated carbon(Pd/C-P) using H_2 PdCl_4 as a Pd precursor followed by calcination in hydrogen gas to remove the chlorine ions. The Pd/C-P catalyst was found to be made of larger Pd nanoparticles showing a decreased migration to the support outer surface than that prepared by the conventional thermal hydrogen reduction method(Pd/C-C). Meanwhile, the pore diameter of the activated carbon support is small(~4 nm).Therefore, Pd/C-P exhibits lower CO oxidation activity than Pd/C-C. It was proposed that the strong interaction between the activated carbon and PdCl_4~(2-)and the enhanced metal–support interaction caused by hydrogen cold plasma reduction made it difficult for Pd nanoparticles to migrate to the support outer surface. The larger-sized Pd nanoparticles for Pd/C-P may be due to the Coulomb interaction resulting in the disturbance of the metal–support interaction. This work has important guiding significance for the controllable synthesis of supported metal catalysts by hydrogen cold plasma.