The fluid flow and transportation behavior of non-metal inclusion were studied in tundish of gas curtain dam by water model experiment and PW system.
比较了传统堰坝组合，吹氩气幕挡墙分别代替堰、坝对中间包流体流动特征的影响，并尝试在中间包内采用双气幕挡墙的控流方式。
Methods peripheral blood flow signals in 51 cases of peripheral pulmonary masses (18 benign, 33 malignant) were evaluated with CDFI and PW.
方法对51例周围型肺肿块(良性18例，恶性33例)周边血流进行CDFI和PW检查。
Conclusions CDFI and PW are useful in showing vascularity and spectral wave of the peripheral blood flow, and in differentiating malignant from benign lung tumors.
结论CDFI和PW能显示肿块周边血流的血管分布和血流频谱，有助于鉴别其良恶性。
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