A common property of many large networks is that the vertex degrees follow a scale-free power-law distribution, the BA model features two generic mechanisms: the networks expanding and the pref.

实际网络中节点分布的一个广泛特征是度的无标度幂率分布，BA模型认为形成这种特征的两个主要因素是网络增长和节点间的偏好连接。

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We adopt two kinds of small world model and scale free BA model to construct the beam transport network.

本文采用两种小世界模型和无标度模型构造出了束流输运网络。

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The establishment of complex network model of these systems, such as small world model and scale-free model, has been a hotspot in recent years.

建立这些系统的复杂网络模型，比如小世界模型和无尺度模型，是近年来研究的热点。

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Since Argentina was once seen as a successful model for free-market policies in Latin America, the scale of its troubles has inevitably brought calls (some from Mr Duhalde himself) for the country, and the region, to turn their backs on such policies.

ECONOMIST: Eduardo Duhalde's plan carries new dangers