因此，如何精确计算超临界流体在不同操作条件下的密度值，对于超临界流体过程的研究和设计均十分重要。

So, the accurate calculation of the density for SCF is a very important problem with the process design and development at different operating conditions.

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为了预测可靠性，一个可靠的阀门设计必须通过临界操作条件下的应力分析和功能合格测试。

In order to predict reliability, a sound valve design must be backed up up by a stress analysis and functional qualification testing under critical operating conditions.

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利用正交实验设计与分析方法，得到实验条件范围内玉米芯超临界水气化制氢的最佳反应参数，同时对气化过程主要操作参数的影响进行了分析。

Using orthogonal experimental method, the influences of the main parameters on corn cob gasification were investigated, and the optimum parameters in the experiment conditions were obtained.

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