contour area of contact Ac 轮廓接触面积
In left area the contour and size of the left ventricle and left atrium and the shape and coaptation of the mitral valve could be visualized.
左区能显示整个左室、左房的大小，二尖瓣的形态与对合情况，二尖瓣脱垂者可见叶瓣游离缘处某一区域向左房脱出。
The stealth technology includes contour design, absorbing materials and plasma stealth technologies, the purpose is to reduce sectional area of average radar for target.
雷达隐身包括外形设计、吸波材料和等离子体等隐身技术，其实质是降低目标的平均雷达截面积。
In tracking, the area of face contour distortion were searched by the method of particle filter, and the face contour parameters were solved.
同时，利用非线性滤波方法在人脸轮廓的变形区域内进行搜索，求解人脸轮廓参数，进行人脸轮廓跟踪。
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