组合方法

In this paper, based on the approach of a tra de-off between mean and absolute deviation, we investigate the portfolio perfo r mances of 169 A stocks in Shanghai stock market.

本文基于均值-绝对偏差的折中方法探讨了上海股票市场169种股票的投资组合分析，得到了一些有益的启示和结论。

Traditionally, searching for the optimize product mix strategy is used Absorption Costing or Contribution margin approach. But these two methods do not consider the influence of constraints.

传统上，寻求最佳的产品组合策略系利用归纳成本法所计算之毛利率或利用边际贡献法所计算之边际贡献作为决策的基准，但是此两种方法都未考虑限制产出的影响。

In order to improve the accuracy of integrated navigation system to a sub-pixel level,and to implement SM correction to INS accumulated error,a multi-point continuous correction method is presented.

为了提高景象匹配和惯导系统的组合精度，进一步达到子像素级的水平，完成景象匹配对惯导系统累积误差的校正，提出了多点连续校正的方法。

At first,the negative data is divided into several parts accumulatively according to the geometric distribution of the training data.

该方法首先根据样本的几何分布，用迭代的方式把负样本分成若干部分与正样本线性可分的样本；然后用L-SVM对这些正负样本进行分类，得到若干个线性分类器；最后，将这些线性分类器顺次组合，构成级联分类器。

The invention relates to an evaporative crystallisation process to make salt compositions which includes a step wherein a mother liquor containing an effective amount of a crystal growth comprising at least one saccharide or saccharide derivative is formed, to form high-purity salt.

本发明涉及一种制备盐组合物的蒸发结晶方法，该方法包括其中形成含有有效量的包含至少一种糖或糖衍生物的晶体生长抑制剂的母液的步骤，以形成高纯度盐。

It is shown that PTDT is a robust and valid approach for mapping QTL of threshold traits. Moreover, PTDT is powerful for marker with multiple alleles and multiple tightly linked markers, too. From the results of simulation on quantitative traits, following conclusions can be derived.

结果表明：(1)PTDT是一个稳健的QTL定位分析方法，在各种参数组合下，其假阳性概率(1型错误)都在设定的显著性水平附近；(2)PTDT不仅可以检测到效应较大的QTL，而且对效应较小的QTL检验功效依然很高；(3)对各种状态1发生率的阈性状PTDT检验功效也很高；(4)对利用多等位基因标记、多个紧密连锁的标记的QTL定位，PTDT依然是一个高效方法。

It provides the theoretical basis for further improvement and development of training and teaching of orienteering.

为了解决以上问题，在程序教学的启发下，运用星形教学方法，实行多种教学方法的优化组合。

In fact, any teaching method, analyze, are either of these methods "permutations and combinations."

事实上，任何一种教学方法，剖析一下，都不外乎这几种方法的&排列组合&！

An alternative method is to transmit the combined digital signal from the parallel channels by frequency or phase modulation of common carrier.

另一种方法是对公共载波调频或调相的方法发送并列信道的组合数字信号。

The thesis based on China s national conditions of Socialism Element...

在实证分析部分，本文采用生产前沿研究的参数方法和非参数方法，测算我国以及各省经济的潜能释放程度、投入组合实际方向与最优方向之间的夹角θ和由于软投入制约造成的GDP损失，并在数据结果的基础上，对我国、各省的经济增长质量进行评价与对比分析，最后提出几点结论以及进一步提高软投入要素质量、经济增长质量的政策建议和措施。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。