Gravity model is a good tool to explain the direction and flow of bilateral trade, and has gained success on the empirical research in international trade.
引力模型作为解释双边贸易流向和流量问题的有力的分析工具，已经在国际贸易实证研究中获得了相当的成功。
Objective To establish the method to assess mathematically the compensation of flow in bilateral vertebralartery(BVA).
目的建立定量描述双侧椎动脉血流代偿性的方法。
The research via gravity model shows that the system quality of each country will impact bilateral trade effectively, and the trade flow is large between the countries with similar systems.
通过应用引力模型的研究发现，各国制度的优劣对双边贸易有显著的影响，制度相似的国家间贸易量较大。
Based bilateral contract first principle, a novel power flow tracing method is proposed which can take into consideration of power flow direction of the bilateral contract.
因此基于已有的双边交易优先的节点功率分配原则，本文提出了一种考虑双边交易功率指向的潮流追踪算法。
Because the proportional principle based power flow tracing method can't take into consideration of power flow direction of the bilateral contract.
因为基于比例分配原则的潮流追踪法不能考虑到双边交易的特性。
It is mainly pointed out that the power flow tracing method is especially suitable for pool model, while the marginal loss coefficient method is useful for bilateral and hybrid models.
首先，对不同网损分摊方法的基本原理、模型算法及其特点进行了阐述，着重指出了潮流跟踪法适用于联营体模式，而边际网损系数法适用于双边交易模式和混合模式。
It is mainly pointed out that the power flow tracing method is especially suitable for pool model, while the marginal loss coefficient method is useful for bilateral and hybrid models.
首先，对不同网损分摊方法的基本原理、模型算法及其特点进行了阐述，着重指出了潮流跟踪法适用于联营体模式，而边际网损系数法适用于双边交易模式和混合模式。
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