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摘要： 描述了一种基于短语统计机器翻译的柱搜索解码器。搜索算法的效率是解码的关键，基于传统的柱搜索解码算法，提出了提高搜索效率的改进措施：动态剪枝策略改进了原来固定地剪枝对搜索当前情形反应不足的问题，提高了剪枝精度；预剪枝策略限制了较差的扩展，减少了不必要的扩展，提高了搜索速度；在研究了当前主要位置重排限制的基础上，提出了一种快速位置重排限制策略，加快了位置重排时的解码速度。此外，针对领域术语翻译唯一性问题提出了专门处理方法以提高翻译的准确度。分析对比实验结果，证明了算法的有效性。
