Objective:To analyze and compare the applying scope and accuracy of the results of LDL-C obtained by direct testing method and indirect calculation methods.
目的：分析比较低密度脂蛋白胆固醇（LDL-C）直接测定与三种间接计算法的适用范围和准确性。
The self-stress detection methods of concrete-filled steel tube structures are summed up as direct detection method, analysis of calculation method and indirect detection method.
钢管混凝土结构自预应力的检测方法可归纳为直接测试法、计算分析法和间接测试法三种。
Evaluation methods for heat exchanger are discussed, especially for indirect evaporative air cooler. The calculation methods of exergy effectiveness and exergy efficiency ratio are researched.
总结了各种换热器性能评价方法，讨论了间接蒸发冷却换热器的(火用)效率分析计算方法。
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