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为准确评价铁路客运专线的运输效益,采用了比较先进的DEA的C2R模型,计算出经济有效利用率、社会就业带动率两大指标值。所选的投入因子的特征根λi解释了总体方差信息的83.7%,确保了DEA的适用性,进而得到了经济和社会两方面的运输效益综合评价结果。 相似文献
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交通运输业是经济社会发展的基础性产业和服务性行业,交通运输人才是国家人才发展的重点领域之一。未来国家之间的竞争,归根结底是知识和人才的竞争,如何识人、如何选人、如何用人已然成为交通管理部门十分关注的核心问题。依据《国家中长期人才发展规划纲要(2010~2020年)》,整个行业正在想方设法,努力完成交通管理人才发展的各项任务,为加快发展现代交通运输业提供强有力的人才保障,而人才测评就是很重要的一种手段。通常,人才测评就是人才测量和人才评价。而我们通过各种量表、问卷、指标体系对人的基本素质、工作业绩来进行定量分析,并且通 相似文献
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The multi-principal high-entropy alloys (HEAs) are promising new alloys. However, it is a challenge to screen out the suitable composition from the diverse combinations. Referring to the prototype AuCu3 with AB3-L12 structure, where it becomes a face-centered cubic (fcc) structure if element A and B are the same element, the site occupying tendencies of the elements and thermodynamic functions are predicted by using the sublattice model supported with first-principles total energy calculations. By considering the Gibbs energy of formation and the configurational entropy, the fcc HEAs in available literatures are examined, and the results of the quinary system with equal-atomic composition CoFeMnNiM and the hexbasic system with equal-atomic composition CoFeMnNiSmM are reported, respectively, where the element M is selected from the rest of the periodical table. When M=Cr, Zn, Ru, Rh, Pd, Re, Os, Ir, or Pt in the quinary systems CoFeMnNiM and when M=Ru, Pd, or Pt in the hexbasic systems CoFeMnNiSmM, respectively, the alloys are recommended to be potential fcc HEAs. The new approach opens a new way to mine the rich ores of HEAs. 相似文献
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