In view of Bullwhip Effect existing in supply chain of petrochemical enterprises, analyzed its cause in terms of demand predication, batch order and price fluctuation.
针对存在于石化企业供应链中的牛鞭效应现象，从需求预测、批量定货、价格波动等方面入手，分析该效应的成因。
The price fluctuation mechanism of farming land resources. farming land resources are influenced by rental, discount rate, supply and demand condition, and inflation rate.
提出了农用土地资源价格涨落机理，农用土地资源价格受以下因素的影响：地租量、贴现率、供求状况、通货膨胀率。
Then, based on the price elasticity of coal demand and supply, the coal future price trend was expected to rise in fluctuation.
还结合煤炭供需价格弹性研究，预期煤炭未来的价格走势将会是在波动中逐渐上涨。
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