It is known by correlation with drilling data that the spectral factorization can describe the boundaries of strong reflection and weak reflection in different frequencies.

通过与钻井资料对比可知，频谱分解技术可以刻画不同频率强反射、弱反射的边界。

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Using TFCC and correlation algorithms for processing of same practical vibroseis seismic data showed that the former could better suppress noises and detect weak reflection signal distinctively.

用TFCC算法和相关算法来处理相同的实际可控震源地震数据，显示前者能更好地压制噪声，并能清晰地检测到微弱回波信号。

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In the teaching practice, reflection is very weak.

目前的教学实践中，反思这一环节还非常薄弱。

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Not only did the boost to GDP shrink from the second to third quarters, the slowing of the growth of both imports and exports is a reflection of a weak world economy.

FORBES: The Revised Third Quarter GDP--Better, But Not By Much

"On the contrary, if you look at the services sector, we see that the PMI continues to fall and is now at the lowest level since 2009 and this is a reflection of extremely weak domestic demand and with the budgetary austerity continuing in Europe for sure, domestic demand is going to remain negative in the near future, " he said.

BBC: Eurozone output contracts again, PMI survey says

Emerging Europe is clearly facing a new normal of much lower growth, a reflection of slow growth in key western European markets, weak banks, lower levels of foreign investment, fiscal consolidation and efforts at much- needed structural reform.

FORBES: If You're Looking for Economic Stagnation Don't Look at Russia, Look At Hungary and the Czech Republic