Double square root model suits the survey data most.

双平方根模型最适合于实测数据。

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New activities and interactions are initially stored in the root model.

新的活动和交互最初存储在根模型中。

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You need to drill down from the root model and open only those fragments that are needed.

您需要回到根模型中，并只须打开那些需要的片段。

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Disempowering the periodic winners, from whichever side, in the increasingly expensive battle to control the levers of government is the only non-partisan approach that strikes directly at the root of the business model of politics a business model based on endless bouts of expansive legislation.

FORBES: Squeezing Every Last Dollar Out Of Democracy

But that model of politics is declining in western Europe, and shows little sign of taking root in the east.

ECONOMIST: Slovakia and Serbia: A tale of two Slavic states | The

Meanwhile, the Dodd-Frank approach does nothing to address the most obvious root causes of damage to the financial system--conflict of interest due to the issuer-pays model and staleness of ratings.

FORBES