全部

1·By exploratory statistic analysis, the paper gave bivariate frequency contingency tables between every qualitative variable and every publishing company.

通过探索性统计分析，给出了调查报告中各定性变量和出版社间的二向频率列联表。

2·Using method of qualitative theory of ordinary differential equation, studies economic harvesting model with variable price and cost for a single population.

利用常微分方程定性理论的方法讨论了价格成本变化的单种群经济捕获模型。

3·Based on the above qualitative analysis, it constructs an inventory optimizing model for manufacturer and storing company respectively, fingers out an optional result of the cost decision variable.

在前面定性分析基础上，分别建立生产型企业和销售型企业有需求提前期的库存优化模型，得出成本决策变量的最优解。

4·Single variable analysis is the mainly used qualitative analysis method in this thesis, while multivariable model and neural network model used as the main quantitative analysis methods.

定性分析方法主要是单变量分析，定量分析方法有多变量模型和神经网络模型。

5·We introduce the concept of time-variable directional field, and establish the stable and unstable theorems by the qualitative method.

引入了时变方向场的概念，用定性方法建立了稳定及不稳的定理。

6·This was treated as a problem of variable selection, and a fast algorithm for identifying the qualitative composition of the sample has been proposed.

本文将这一问题作为一最优回归子集的确定问题处理，提出了一种较快速鉴定组成的方法。