首先采用基于最小二乘平面拟合的背景趋势去除法对感兴趣区域进行预处理,提高肿块与背景区域的对比度;然后用等周(Isoperimetric)图论算法对预处理后的图像进行分割,根据肿块区域灰度值高于背景区..
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等周问题 [数] isoperimetric problem ; Generalized Isoperimetric Problem
等周期线 equivalent periodic line
等周的 isoperimetric
恒等周期 [数] identity period ; repeating unit ; identity
等周不等式 isoperimetric inequality
等周形 isoperimetric figure
等周参数 isoperimetric parameter
逆等周问题 inverse isoperimetric problem
等周常数 isoperimetric constant
本文首先使用初等方法导出三角形与四边形的等周不等式，进而用富里埃级数方法解决了一般等周问题。
We deduced equal perimeter inequality of triangle and quadrangle by elementary mathematical methods first and solved general equal perimeter problems by using methods of Fourier series.
当武在2010年加入国家队时，他的教练当时说，与周洋和范可欣等有天赋的滑冰选手相比，他几乎“无足轻重”。
When Wu joined the national team in 2010, he was seen as almost "nothing" compared to gifted skaters like Zhou Yang and Fan Kexin, as his coaches said at the time.
诺丽叶已用于治疗牙龈炎，牙周疾病，喉痛，喉炎，扭伤，皮肤病等。
Noni leaf has been used for the treatment of gingivitis, periodontal diseases, laryngalgia, laryngitis, sprain, skin disease, and so on.
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