At the century timescale, war frequencies and the ratio of wars per year in different centuries have been calculated at global and continental geographic scales.
在百年时间尺度上，涉及到全球以及整个大陆范围的战争发生率，以及不同世纪内平均每年的战争比率已经被统计出来。
The computed characteristic scales of the upstream vortex show distinguished three-dimensionality and vary with the velocity ratio and the water depth.
计算得到了上游壁面涡的特征尺度，结果表明上游壁面涡具有高度的三维性，其特征尺度依赖于流速比和环境水深。
The empirical results suggested that the correlation and volatility ratio between index futures and spot vary over various time scales.
进一步研究表明，波动性和相关性的多尺度变化导致了最小方差对冲比率及对冲效率呈相似规律的多尺度变化。
The empirical results suggested that the correlation and volatility ratio between index futures and spot vary over various time scales.
进一步研究表明，波动性和相关性的多尺度变化导致了最小方差对冲比率及对冲效率呈相似规律的多尺度变化。
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