The scale-free networks cannot be formed without preferential attachment in the local events.

因此，没有偏好依附无标度网络是不能形成的。

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Finally, a new method concerning the adjustment of free networks with stochastic parameters is given.

最后，作者提出了参数为随机的自由网平差新方法。

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Since the ubiquity of scale free networks, the security of these networks has become of great concern.

由于无尺度网络的广泛存在，这些网络的安全性成为人们日益关心的一个重要方面。

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Google stands to benefit significantly if more people start using its services to browse the web over sprawling, free WiFi networks, or make phone and video calls calls via free services Google Voice or Google Hangouts.

FORBES: What Would Happen If America Got Free, 'Nationwide' WiFi? Google Wins, Carriers Lose

There has been some speculation that both kinds of business model will be undermined by the rise of free social networks such as Facebook, which make it easy for people to share large amounts of personal information with one another.

ECONOMIST: Online dating

Cities who decide to launch free wireless networks need to make sure they adequately promote the service, explain how to use it, and need to know in advance how people or businesses want to get online and help promote the project.

FORBES