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1)  effective array length
有效组合长度
2)  efficient occlusal length
有效咬合长度
3)  effective length
有效长度
1.
In this paper,we made some theoretical analysis of effective length of radiant heat transfer based on the zone method of three dimensional radiant heat transfer problem in the furnace.
采用有效长度概念进行区域法辐射换热数值计算时 ,可以使计算工作量大大减少 ,也可以为快速计算提供理论方面的依据 。
2.
Based on the systematic optimisation, a new method for determiningstorage siding number and effective length of herringbone tracks isobtained.
本文阐述在主调车场内设置箭翎线时,分段存车线数量及有效长度计算,以系统优化为基础提出新的方法和结论建议,使箭翎线设计更为合理有效。
3.
The stress field,saturated stress,stress transfer efficiency and effective length in carbon nanotubes(CNTs) reinforced polymer composites were analyzed based on the three-phase concentric cylindrical shell model along with shear-lag arguments.
采用三相同轴柱壳剪切滞后模型,分析含有界面层的碳纳米管复合材料中的应力场、饱和应力和应力传递效率以及碳纳米管的有效长度。
4)  effective combination
有效组合
1.
Based on the correlation analyses of such petrophysical properties as density,magnetic susceptibility,remnant magnetization,electrical resistivity,and chargeability for 3 000 samples from Hebei Province,the authors carried out a study on effective combinations of geophysical methods and found that geological survey with specific aim needs specific combination of geophysical methods.
对河北省近 30 0 0件样品的多种岩石物性参数进行了相关分析 ,以此探讨物探方法的有效组合问题。
2.
From a new angle, this article studies inter-relations,rules of variation,algorithm and new expressing method of combination proportion, variance and ratio of profit cf the effective combination,mean and variance.
本文能过函数分析法及空间图形等,从新的角度研究了均值——方差有效组合的组合比例、方差、收率之间的相互关系、变化规律、算法及新的表示方法。
5)  efficient portfolio
有效组合
1.
The sufficient and necessary condition for existing efficient portfolio is obtained,and also the analytic solutions of efficient portfolio and efficient frontier is derived,which generalize successfully the classic Markowitz model and are helpful to investigate portfolio efficient subset further.
利用广义逆矩阵研究了协方差阵奇异时的投资组合问题,突破了传统方法中要求协方差阵可逆的限制,得到了证券市场存在有效组合的充要条件,并给出了有效前沿和有效组合的解析解,成功地推广了经典Markowitz模型,同时还将有助于证券组合有效子集的深入研究。
2.
At the present there exist three methods accepted to do the portfolio management, which are fundamental analysis, technological analysis and the modern portfolio analysis, we used the three different ways together in this dissertation to do the efficient portfolio management.
第四、在投资组合管理上,针对我国证券市场存在的最小交易量的问题,建立了具有投资下界限制的风险证券有效组合决策模型,给出了不相关风险证券有效组合投资比例的算法及解析表示。
6)  Combination-Efficiency
组合有效
补充资料:有效组合

有效组合——
       有效组合是有效边界上的点所对应的证券组合。有效组合具有如下特征:在期望收益率水平相同的组合中,其方差(从而标准差)最小的;在方差(从而给定了标准差)水平相同的组合中,其期望收益率是最高的。


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