Objective to investigate the indoor radon concentration and to estimate the exposure dosage in urban area of Suzhou city.
目的了解苏州市区居民室内氡浓度及所致剂量。
Methods: Numerical simulations of the thermal necrosis extent in a target tissue and its dependence on the HIFU exposure dosage have been adopted.
方法：对靶组织热固化体元与超声幅照计量的关系进行了数字模拟研究。
Therefore, such factors having effect on the precision of deep UV lithography as diffraction effect, exposure dosage, wavelength and distribution of fly's eyes lens etc.
同时由于紫外光的衍射效应，获得高精度的大高宽比结构并不容易。本文深入研究了影响紫外深度光刻图形转移精度的如下因素；
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