基于工业化进程的中国工业工程发展策略研究

在分析了中国工业化进程及主要问题的基础上,从工业工程与工业化进程的关系入手,阐明发展与应用工业工程是解决中国工业化发展问题的重要工具。然后,分析了中国工业工程的发展现状及问题,并研究了基于工业化进程的CIE理论与体系及发展需求。最后,系统研究了CIE发展策略。     

基于FDS和元胞自动机动态耦合的火灾疏散模型

为研究火灾场景下温度、烟气和CO浓度等灾害因子对疏散的影响,建立基于FDS和元胞自动机动态耦合的火灾疏散模型。将FDS的网格和元胞自动机的元胞一一对应,将由FDS运行得到的灾害数据通过Python等技术手段实时加载到元胞中,使灾害数据持续影响行人转移概率,从而实现灾害和疏散的动态耦合;以单层教学楼作为仿真场景进行模拟分析,对火源位置和热释放速率等因素进行讨论,得出这些因素对行人疏散进程的影响规律;将模型与传统软件和同类方案进行对比。研究表明,火灾导致的高温和烟气会影响行人对疏散路径和安全出口的选择;热释放速率越大,行人越早处于危险状态,同时处于危险状态的行人也越多;该模型相比传统疏散软件不仅能考虑火灾产生的致灾因子对行人疏散的动态影响,还能确定行人最早处于危险状态的位置和时间,并用可视化的方式表现出来。     

Stimulated Collision-induced Fluorescence in XeCl-laser-pumped Barium Vapour at High Buffer-gas Pressures

Abstract

New stimulated collision-induced fluorescence lines at 551·9, 606·3 and 611·1 nm were observed in XeCl-laser-pumped barium vapour at high buffer-gas pressures. They correspond to barium 6s6d ³D₂-6s6p ³P₁ and 5d6p ³P_{2, 1}-6s5d ³D_{3, 2} transitions, following a preceding spin-forbidden transition 6s7p ¹P₁-6s6d ³D₂. A similarity was found to exist between this 6s7p ¹P₁-6s6d ³D₂ transition and the well studied 6s6p ¹P₁-6s5d ³D₂ transition.     

1 000 MW高效宽负荷率的超超临界锅炉开发

根据反平衡法对电站锅炉各项效率损失进行分析，潜力较大的是排烟损失和未完全燃烧损失，主要影响因素有过量空气系数、排烟温度、燃烧效率；1 000 MW高效宽负荷率超超临界煤粉锅炉的开发采用低过量空气系数设计理念，在炉膛选型、受热面布置、燃烧系统设计、降低锅炉漏风等方面采取措施。与传统设计相比，50% THA负荷下锅炉效率提升了0.96%。     

Deformation and fracture mechanisms of in situ synthesized TiC reinforced TC4 matrix composites produced by selective laser melting

In this study, TiC/TC4 composites were fabricated using selective laser melting (SLM), and the deformation mechanism and fracture characteristics of the composites with nano-sized TiC particles formed in situ were studied. The experimental results showed that the rapid melting and solidification characteristics of SLM and the Marangoni effect of the liquid pool promoted a considerably homogeneous dispersion of the in situ-formed nanoscale-TiC reinforcement in the TiC/TC4 composites. In particular, an enhanced compressive strength of 1490.2 MPa and a considerable fracture elongation of 21.5% were simultaneously achieved for the TiC/TC4 composites, which could be attributed to the load transfer effect and the formation of denser and more uniformly distributed dimples. Combined with the finite element (FE) analysis, the uneven stress distribution in the shear band of the TiC/TC4 composites led to the fracture. Further, the fracture surface analysis showed that the in situ nanoscale TiC reinforcement promoted the fracture of microbubbles from the α/β interface with the concentrated distribution of the V element to the interface between TiC and the Ti matrix because of the load transfer, which promoted the uniform distribution of the V element in the dimple.     

网络安全技术及策略在校园网中的应用研究

计算机技术的快速发展,也导致网络安全形势日益严峻。网络安全技术对于人们日常生活、工作以及学习所产生的影响愈发深远。在校园网络系统中,部分非法入侵者会将目标设定到某一局域网当中,从而导致正常的教学秩序受到干扰,对此必须要采取一些行之有效的应对策略,来保障校园网的正常运行。     

Colorimetric artificial nose for identification of Chinese liquor with different geographic origins

Colorimetric artificial nose was used to characterize and identify Chinese liquors from six different geographic origins. Using chemical dyes as the sensing elements, the developed colorimetric artificial nose showed a unique pattern of color changes upon its exposure to Chinese liquors. Data analysis was performed by chemometric techniques: Hierarchical cluster analysis (HCA), principal component analysis (PCA) and linear discriminant analysis (LDA). Each category of Chinese liquor could cluster together in PCA score plot. No errors in classification by HCA were observed in 45 trials. LDA model showed a 100% of prediction ability for Chinese liquor. The results demonstrated that colorimetric artificial nose was able to classify Chinese liquors from different geographic origins.     

邯钢烧结配矿结构优化实践

通过研究含铁料基础性能,分析各种配矿结构对烧结过程的影响规律,确定主流矿种及其合理区间,在此基础上,结合综合成本、有害元素、资源库存等因素进行动态优化调整,贯彻稳硅控铝思路,根据生产需要及主流料资源制定更加合理的配矿结构。     

立井联合法施工导孔堵孔问题的处理与实践

针对西山矿区安家沟进风井采用立井联合法施工时导孔堵塞问题,分析了导孔堵塞的主要原因,提出了解决方案,并进行实践,取得了良好的技术经济效益.