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arXiv 2102.01975math.OC
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梯度仪的二阶锥optimization

Second-order cone optimization of the gradostat

Josh Taylor, Alain Rapaport

摘要:

我们最大限度地生产沼气在一个梯度恒定在稳定状态。物理决策变量是进入每个罐的水、基质和生物质以及通过互连管道的流量。我们的主要技术重点是描述微生物生长的非凸约束。我们推导了一个松弛公式,并证明了当梯度稳定器为流出连接、其系统矩阵不可约且增长率满足一个简单条件时,该松弛公式是准确的。松弛的Monod和Contois增长率的二阶锥表示。我们将稳态模型扩展到多个时间段的情况下,用数值逼近代替导数,而不是将它们设置为零。由此产生的优化是二阶圆锥程序,可以使用标准工业软件进行大规模求解。

英文摘要:

We maximize the production of biogas in a gradostat at steady state. The physical decision variables are the water, substrate, and biomass entering each tank and the flows through the interconnecting pipes. Our main technical focus is the nonconvex constraint describing microbial growth. We formulate a relaxation and prove that it is exact when the gradostat is outflow connected, its system matrix is irreducible, and the growth rate satisfies a simple condition. The relaxation has second-order cone representations for the Monod and Contois growth rates. We extend the steady state models to the case of multiple time periods by replacing the derivatives with numerical approximations instead of setting them to zero. The resulting optimizations are second-order cone programs, which can be solved at large scales using standard industrial software.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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