Therefore, optimal design problems of complex AT plans for equipment are difficult to be solved by analytical approaches.

因此，解析优化方法在装备的复杂加速试验方案优化设计中难以应用。

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The first example implementation uses a technique where the initial design, as proposed by the standards used, suggests a non-optimal access pattern and causes performance problems.

第一个实例的实现使用的是最初的设计方法，由于是按标准使用模式提出的，表明它不是最佳的访问模式，因此会引起性能问题。

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Fundamental principle and related key problems for the application of finite element method into structural optimal improvement design are expatiated and analyzed.

阐述和分析了应用有限元方法进行结构优化改进设计的基本原理和所涉及的关键问题。

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