不使用均整器可以提高加速器的输出剂量率，减少出束时间。
Theoretically, without the flattening filter may reduce the treatment delivery time by enhancing the output dose rate.
均整器的使用是为了获得强度分布均匀的较大射野，用于常规治疗。
The flattening filter in the treatment head is used to provide large, uniform x-ray fields for conventional radiotherapy.
本文研究均整器对IMRT治疗实施时间的影响和电子射野影像系统(EPID)在剂量验证中的应用。
This study investigates the influence of flattening filter on the IMRT treatment delivery time and the application of electronic portal imaging device (EPID) in dosimetric verification.
本文主要从实验研究以及对实验测量结果分析的角度来完成多锥度均整器的设计，并且给出了该多锥度均整器在实际使用中的效果。
This article introduce a design of multi - taper flatness filter on basis of the experiment and analyse, and shows the effect in practice.
第二，将本文所提改进粒子群算法应用于工业PID控制器的参数整定，以及带约束优化的工业设计中，均取得了非常理想的效果。
Secondly, this algorithm is applied to the PID controller tuning and the industrial design with restrictions. The results are fairly well.
改进型导向器的整级数值模拟结果表明，涡轮在设计点的效率提高了15%，且在宽广的工作范围内其通流能力和效率均得到了明显的提升。
The efficiency of turbine stage at designing point increases 15%, and the flow rate and efficiency of turbine stage are enhanced remarkably within a wide working range.
改进型导向器的整级数值模拟结果表明，涡轮在设计点的效率提高了15%，且在宽广的工作范围内其通流能力和效率均得到了明显的提升。
The efficiency of turbine stage at designing point increases 15%, and the flow rate and efficiency of turbine stage are enhanced remarkably within a wide working range.
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