A large system of sparse linear and nonlinear algebraic equations is the typical form of mathematical models of process design and steady state process simulation.

大型稀疏代数方程组是稳态过程模拟与过程设计数学模型的典型形式。

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The mathematical model can be described as a coupled system of nonlinear partial differential equations with moving boundary values.

其数学模型是一组多层对流扩散耦合系统的动边值问题。

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But now, when used for studying the ladle injection system, these mathematical equations are based on a lot of assumption, which lead to some deviation from the exact results.

但目前在用其研究钢包喷吹体系中，各种数学模型建立在大量的假设基础上，导致模拟结果与实际有些偏差。

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