用实空间中的重整化群理论，对二维正方形格点上的高分子模型自踪迹规避链进行了求解。

In this article, the critical exponents of the polymer model SAT in two dimensional square lattice have been studied with the real space renormalization theory.

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在离散微粒群算法的基础上，提出了一种基于二进制的随机多目标P SO算法，并对感知模型进行覆盖优化。

Then a binary awareness model based on stochastic sensor placement and a stochastic multi-objective PSO arithmetic based on binary system which is applied on awareness model have been present.

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第二，运用实证研究法、调查研究法、仿真模拟法建立了广西北部湾港口群物流系统SD模型。

Second, this paper establishes a SD model for Guangxi Beibu Gulf port group logistics system using of empirical research method, survey research method, simulation method.

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