以下为句子列表：
英文: Abstract: Aiming at the variety of modals of nonlinear systems,we proposed a general parameter estimation method based on Genetic Algorithms(GA),which can be used in most kinds of nonlinear system modal.This method was applied to simulating parameter esti
中文: 文摘:针对非线性系统模型的多样性，提出适用于多种非线性模型的基于遗传算法的参数估计方法，并以多种非线性模型为例作了仿真研究.结果表明，遗传算法是非线性系统模型参数估计的有效工具.
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英文: First step in gradual collocations of nonlinear system is nonlinear collocation, the others are nonlinear filters.
中文: 非线性系统逐步拟合推估理论第一步是非线性拟合推估，以后各步是非线性滤波。
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英文: Seawater intrusion is modelled as a nonlinear system of coupled two parabolic partial differential euqaitons, of which one is the pressure flow equation and the other one is the concentration equation of convection-dispersion type.
中文: 摘要海水入浸问题的数学模型是两个耦合抛物型偏微分方程，其中一个是关于压力的流动方程，另一个是关于浓度的对流扩散方程。
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英文: The nonlinear equation of aircraft is linearized by state transforming differential relationship between input and a new input, and the nonlinear system is decoupled to a one order linear system and a two order linear system.
中文: 通过状态变换输出与新输入间的线性微分关系使非线性飞机方程反馈线性化，将原非线性系统解耦为一个一阶和一个二阶线性系统。
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英文: The proposed fuzzy sliding mode controller does not require any knowledge of a nonlinear system and attempts to improve both transient and stability margins.
中文: 建议的模糊滑动模式控制器是针对非线性系统在未知参数变化与结构下的强健追踪控制，其设计包含补偿器、衰减技术、模糊逻辑近似法。
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