Erratum to: Experimental research on overlying strata movement and fracture evolution in pillarless stress-relief mining

International Journal of Coal Science & Technology -     

高层住宅立面腰线设计浅析

文章针对腰线在高层住宅立面设计中的广泛运用,探讨了腰线的起源及在高层住宅立面设计中的作用,并对高层住宅立面腰线的设计做出了一定的探索。     

探讨绿色建筑设计与绿色节能建筑

随着建筑行业的快速发展,为了缓和日渐紧张的人口和资源矛盾,提高资源使用率,降低资源消耗,实现人与自然和谐相处的发展策略,必须要走绿色环保性建筑的道路。本文就绿色建筑的设计和绿色节能建筑进行讨论分析。     

美国NEBS认证

电子通讯设备进入美国市场必须进行NEBS认证.介绍了NEBS两大标准的内容、要求和认证等级.根据经历过NEBS认证的设备商的经验,总结给出了NEBS认证过程中的注意事项和建议.     

由基频计算拉索拉力的实用公式

振动法测索力广泛应用于索结构的施工控制、状态评估和健康监测,其基本原理是基于弦振动理论。弦理论忽略了索的垂度和抗弯刚度的非线性影响,在实际应用中有时会带来不可接受的误差。采用能量法和曲线拟合方法,建立了分别考虑索垂度和抗弯刚度影响,由基频计算索力的实用公式。对公式的适用范围进行了讨论,并与现有解的结果进行了比较,表明本文公式可满足精度要求。     

弯箱梁桥横梁计算方法的分析

平面曲线桥,由于弯扭耦合作用,横梁对于增强桥梁的结构整体性,加强主梁之间的横向联系,改善荷载横向分配等起到重要作用,因此应把横梁作为主要受力构件加以考虑。本文对计算方法进行了分析和探讨,认为用梁格法进行有限元建模值得推荐,并通过算例进行分析,提供一些参考。     

2013年我国钛白粉市场走势与产业状况分析

分析了2013年我国钛白粉的市场发展情况,并进一步探讨钛白粉产业结构的变化和取得的技术进步。     

Visible Light‐Initiated C(sp3)?Br/C(sp3)?H Functionalization of α‐Carbonyl Alkyl Bromides through Hydride Radical Shift

A new visible light‐initiated 1,5‐hydride radical shift strategy has been developed to enable the one‐step functionalization of both a C(sp³) Br bond and a C(sp³) H bond adjacent to the same carbon atom. This visible light photoredox catalysis offers a mild and straightforward access to diverse five‐membered carbocyclic ring‐fused polycyclic hydrocarbons with high turnover numbers (TONs; up to 4.93×10³) and broad substrate scope.

     

Kinetics and effect of surfactant and cosurfactant on miniemulsion polymerization of acrylate monomers

The effects of the type and amount of the surfactant and cosurfactant on the miniemulsion polymerization of acrylate monomers were studied, and the comparison of the kinetics between miniemulsion polymerization and conventional emulsion polymerization was discussed in the presence of reactive surfactant allyloxy nonylphenol propyl polyoxyethylene (10), ether sulfate (DNS-86), and reactive cosurfactant stearyl methacrylate (SMA). The results showed that the obtained polyacrylate miniemulsion had a high monomer conversion rate and a low coagulum fraction, which were affected little by the surfactant and cosurfactant type. When the surfactant and cosurfactant amounts were all 2 wt%, the contact angle of the prepared polyacrylate miniemulsion with DNS-86/SMA and the water absorption fraction of the latex film were 39° and 8.3 wt%, respectively. FTIR results confirmed that DNS-86 and SMA took part in the polymerization of acrylate monomers. In the miniemulsion polymerization of acrylate monomers with DNS-86/SMA, monomer droplet nucleation was the main nucleation style.