By using orthogonal analysis method, determined the volatile as the main parameter to effect combustion efficiency in coal characteristics.

通过正交分析，将燃煤挥发份作为燃煤性质中影响燃烧效率的最重要参数。

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By use of the orthogonal analysis method and the FEM programs the influence of several process factors on the quality of steel ingots is investigated.

以模拟程序为工具，用正交设计方法分析了锭身锥度、锭身高径比、冒口侧壁保温条件、冒口端部保温条件及冒口锥度等工艺参数对钢锭质量的影响。

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The orthogonal sampling demodulating technique for low frequency time-code signal is introduced. Based on the theoretical analysis about its principle and implement method, The simulation is tested.

作者提出低频时码信号的正交扫描解调技术，从理论上分析了正交扫描原理和实现方法，并进行了仿真测试；

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