At this remark , passed obviously in the spirit of where ignorance is bliss , mr bloom and stephen , each in his own particular way , both instinctively exchanged meaning glances , in a religious silence of the strictly entre nous variety however , towards where skin - the - goat , alias the keeper , was drawing spurts of liquid from his boiler affair 此话一听就是本着无知乃至福93的精神讲的，布卢姆先生和斯蒂芬以各自的方式本能地相互交换了一下意味深长的眼色，然而是在虔诚而讳莫如深94的沉默中他们随即把视线朝“剥山羊皮” -也就是店老板一一的方向投去。
From mathematical models for inverse scattering in two dimensional homoge - nous media including dirichlet , neumann , robin , all kinds of probable mixed boundaries and cracks , direct and inverse scattering are discussed , and ill - posed integral equation and indicator function method are formulated for the diverse of boundary identification . it is shown that the kernel of the integral equation characters the boundary of scatterer , which is determined by solv - ing it by virtual of regularity method , meanwhile , some numerical tests are given . 2 在二维均匀介质逆散射各种边界识别的数学模型(包括dirichlet , neumann , robin ，各种可能的混合边界问题，裂纹问题)下，分别考虑了正散射问题和逆散射问题，推导了上述各种边界识别的不适定积分方程以及指示函数方法，由于积分方程的核充分表征了散射物的边界，由此说明只要利用正则化方法求解该积分方程，就可以确定散射物的边界，并给出了一些数值实验。
