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基于终南山特长公路隧道东线北口Ⅱ类围岩堆积体段的工程条件,通过对堆积体稳定性的分析,提出并实施了有效的加固措施和施工方法,通过监控量测的数据分析,证明了该方法的可靠性.达到确保软弱围岩段安全施工的目标。 相似文献
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本文介绍了作者在美国引进美国的催化裂化装置SPECTRUM集散系统上开发的一套优化指导系统,系统具有产品质量估计和优化指导等功能。 相似文献
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机车牵引电动机轴承温升的考核 总被引:1,自引:0,他引:1
探讨在机车牵引电动机试验时,运用温升检测进行电机轴承技术状态考核的方法。 相似文献
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为了改进微粒群优化算法的结果,用数论网格法初始化微粒群的初始位置,对位于当前全局最优点的微粒重新初始化,最后用一种爬行算法求精微粒群寻优的结果.实验表明,改进后的算法能克服标准微粒群算法的困难,获得更好的结果. 相似文献
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着重介绍了甘肃草产业发展现状及红豆草产业发展的制约因素。现今,甘肃省很多农户在红豆草种植认识上有所缺陷,政府的扶持力度不足,没有形成自己的品牌。针对以上不足,提出如下建议,以求为甘肃省红豆草产业能够快速发展,献上绵薄之力。 相似文献
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Numerical Simulation of Tripolar Vortex in Dusty Plasma with Sheared Flow and Sheared Magnetic Field
This article presents a study we have made of one class of coherent structures of the tripolar vortex. Considering the sheared flow and sheared magnetic field which are common in the thermonuclear plasma and space plasma, we have simulated the dynamics of the tripolar vortex. The results show that the tripolar vortex is largely stable in most cases, but a strongly sheared magnetic field will make the structure less stable, and lead it to decays into single vortices with the large space scale. These results are consistent with findings from former research about the dipolar vortex. 相似文献
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聚氨酯泡沫塑料吸能特性研究 总被引:2,自引:0,他引:2
本文介绍了利用分离式Hopkinson压杆对聚氨酯泡沫塑料进行的一种高应变率实验,给出了聚氨酯泡沫塑料在高应变率下的动态应力-应变曲线,对聚氨酯泡沫塑料的动态力学性能及吸能缓冲特性进行了深入的分析. 相似文献
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The linear mode conversion of electromagnetic waves in the hot, unmagnetized inhomogeneous plasma is studied numerically for different density profiles, and the dependence of the absorption coefficient on the incident angles and the wave frequencies are obtained for different electrons' temperature. The results show that the shapes of the density profiles and the electron's temperature create a certain effect on the coefficients of absorption, which reaches its peak value (about 50%) for appropriate parameters. Effective absorption occurs in a limited range of parameter q. 相似文献