The shortcoming of current slag cavity brick is presented . Its size is determined. The action of production method and gap ratio on its strength is studied in this paper.

文中提出了现行煤渣空心砖的不足，分析确定了煤渣空心砖的几何尺寸，研究了生产方法和孔洞率对煤渣空心砖强度的影响．。

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For all three kinds of three-dimensional photonic crystal structures, their band gap width and band gap ratio can be improved with the increase of dielectric constant ratio.

对于不同的三维光子晶体结构，随着介电常数比的增大，完全禁带的宽度和带隙率也会随着增大。

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So, bearing this in mind, if we compare the incomes of the top and bottom fifths, we see a ratio of 15 to 1. If we turn to consumption, the gap declines to around 4 to 1.

当我们知道这些之后，如果再去比较最高和最低的5%的家庭的收入，我们得到一个比例15:1。

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Infy is trading at a 36 per cent discount to its 10-year median price to earnings ratio, the widest gap among the foursome.

FORBES: India's Main IT Outsourcing Firms To Report Tepid Earnings

Japanese debt is unique to other countries because Japan has been indebted for the past two decades, its leverage didn't increase rapidly and the gap between Japan and others declined because other countries' debt-to-GDP ratio increased.

FORBES: Japan: Land Of The Rising Sum

At one time analysts liked to do this by quoting the yield gap (though this became inverted when dividend yields fell below bond yields in the 1950s) or the yield ratio, both of which relate share to bond yields.

ECONOMIST: A survey of global equity markets: Valuation waltz | The