The BP network architecture applied to determine GPS standalone position is designed. Meanwhile, the conjugate gradient algorithm is used to improve the training velocity and accuracy of the network.

本研究设计了适用于GPS单点定位计算的BP人工神经网络模型结构，采用共轭梯度算法改善网络的训练速度和精度。

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That's true for standalone GPS devices such as TomTom or Garmin and smartphone navigators like Navigon.

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Specifically, the Touch Pro, Saga, and Omnia have all been mentioned as getting fully unlocked, standalone GPS via firmware updates in the first half of next year.

ENGADGET: Verizon relents, promises to open GPS on some WinMo phones next year

Last-minute holiday shoppers might jump at discounts on standalone GPS devices like the basic ones from Garmin and Magellan, but those gifts may not get much use, analysts suggest.

FORBES: Why To Think Twice Before Buying That GPS Device