In the second chapter contact problem of a half-plane with periodic cracks under periodic rigid punch action is studied.

第二章研究了具任意形状裂纹的各向同性弹性半平面在周期压头作用下的接触问题。

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And the distributed boundary value's integral formula of another set of analytic function in upper half-plane is established.

同时建立了另一类上半平面解析函数在其分布边值意义下的积分公式。

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Where the Green function is obtained by the sum of the half-plane solution for surface displacement and beam theory deflections.

其中格林函数是由半平面的位移解，梁的挠度理论求得。

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The plane was sheared in half -- its nose poking through the front window of a shattered home.

CNN: STORY HIGHLIGHTS

It first flew in 1989 and went on to become the best selling 30-seater plane ever made - in part because it is very fuel efficient and has half the running costs of a regional jet.

BBC: Saab's 'special mission' aircraft searches for customers

He brought tourists to Australia by the plane-load, though they half-dreaded what they would find there.

ECONOMIST: Steve Irwin