“5G+教学练战一体化”信息平台设计与实现

5G网络具有大带宽、高可靠、低时延和广联接等特征,使得计算与智能不断延伸,共同推动各行各业的数字化、智慧化转型升级。在此背景下,通过对公安院校“教学练战一体化”人才培养配套设施和平台的现状分析,借助5G技术优势,按照基础设施共享、数据共享、技术共享和模型共享的原则,设计建设智慧化、开放性的“教学练战一体化”信息平台,为教学练战各环节应用的灵活创设提供支撑,服务新时期公安专业实战化教学模式创新。

高分散镍硅催化剂对喹啉催化加氢的性能

以硝酸镍和硅溶胶为原料,采用蒸氨水热法,制得了一系列负载量为10%(以镍在催化剂中的质量分数计,下同)的镍硅酸盐衍生的Ni-PS-AEH-x(x代表不同焙烧温度,下同)催化剂,并用于喹啉选择性加氢制取1,2,3,4-四氢喹啉。通过考察不同镍基催化剂的加氢性能,发现Ni-PS-AEH-400催化性能最好。通过考察反应条件的影响,确定最佳反应条件为:底物与金属镍投料比(物质的量之比,下同)为30∶1、反应温度100℃、氢气压力3MPa、反应时间120min,此时喹啉转化率为99.0%,1,2,3,4-四氢喹啉收率为95.4%。采用FTIR、XRD、TEM、N2吸附-脱附、H2-TPR和XPS对催化剂结构、组成、形貌进行了表征,结果表明:镍硅酸盐结构使Ni-PS-AEH-400比表面积大、镍纳米粒子分散均匀,活性中心与载体间的相互作用力强,使其在喹啉加氢反应中具有较浸渍法制备Ni/SiO2-IMP更优异的催化性能。

Thermodynamic Study on Self-propagating High Temperature Synthesis of TiB2/Fe Composites

Based on the experimental analysis and theoretical calculation, the self-propagating high temperature synthesis of TiB2/Fe composite was studied. The experimental results show that the interfacial between TiB2 and Fe was smooth and clear, and the composite bending strength increased with the addition of Fe, however, the hardness decreased accordingly. The thermodynamics of the composites preparation process was calculated. The calculation results show that the primary chemical reaction was the reaction between Ti and B. The extra B can react with Fe, producing the brittle phase Fe2 B. By increasing Ti, the production of Fe2B will decrease and a few of Ti-Fe intermetallic compound will be produced by the reaction between Ti and Fe in the composites. Finally, according to the Merzhanov condition of the adiabatic system, it is concluded that the Fe content must be selected between 16.3% and 54.3% by the thermodynamics temperature of reaction calculation.

兵棋推演在核应急救援领域的应用探析

将兵棋推演的理论与概念应用于核应急救援领域,对于检验核应急预案的有效性、应急救援的实效性、应急资源配置的合理性及开展应急准备能力评估具有重要意义。本文基于兵棋推演的技术和方法,对核应急救援兵棋推演系统的构成要素及系统设计进行了研究和分析,给出了核应急救援兵棋推演系统的基本框架和主要功能单元的设计考虑。核应急救援兵棋推演系统有助于提升核应急救援的管理水平,为核应急救援训练演练提供方法手段,并能够促进核应急救援管理的经验积累。