将广义函数用于线天线阵综合，可得到广角近似平顶的方向图，亦可得到具有单一付瓣和无付瓣的方向图。
By using the generalized function in the linear array synthesis the direction diagram with approximate flat top in wide Angle region and with or without a single side lobe can be obtained.
目的：应用肺静脉血流图结合二尖瓣血流图评价糖尿病心脏病变引起的左室舒张功能变化，旨在探讨更敏感的检测方法。
Objective:To seek for a new Echo Doppler method which can more sensitively detect changes of left ventricular diastolic function in NIDDM.
目的比较经胸超声心动图(tte)与经食管超声心动图(T EE)对先天性与获得性主动脉瓣病变诊断的准确率。
Objective To compare the diagnostic accuracy of congenital and acquired heart disease with transthoracic (TTE) and transesophageal (TEE) echocardiography.
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