Fix the volatile search direction bug.

修改了查找方向不稳定的问题。

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With the two degrees information of the object function in search direction, the algorithm improved the convergence.

由于搜索方向含有目标函数的二阶信息，提高了算法的收敛速度。

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In this paper a transitional design centering method is proposed, the formula for its relative search direction is also deduced.

本文提出了一种过渡情况下的电路中心值设计方法，并导出了相应的搜索方向公式。

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While social search is undoubtedly powerful and a step in the right direction, the need for this added layer of credibility in search is even more important, returning results from the true experts at that topic.

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The overwhelming response to Dubost's experiment did make him question if he shouldn't take his career in a different direction instead of just search for a new job.

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The Paris-based International Herald Tribune takes the search for the guilty party in a slightly different direction, blaming the euro's record dive on the German chancellor's "negative comments".

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