two-stage distribution 双段式分布
Conclusion: Applying catalytic models to fit the positive rate of stool examination age distribution data of schistosomiasis, two-stage catalytic model is much better.
结论：应用催化模型拟合血吸虫病粪检阳性率的年龄分布资料，两级催化模型较为合适。
The two-stage supply chain model of manufacturer and distributor is developed, which is widely adopted in server and distribution system.
研究仅具有制造商和销售商的二级供应链模型，这类模型广泛适用于服务销售系统。
Then, a multi-objective two-stage distribution planning model based on fuzzy satisfaction is put forward.
其次，提出了基于模糊满意度的多目标配电网两阶段规划模型。
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