上下文

Context is the necessary resource not only for corpus based linguistic but also for solving the problem in computational linguistics.

词语的上下文是语料库语言学中自然语言知识获取和解决自然语言处理中多种实际应用问题必须依靠的资源和基础。

To solve that problem, the collocation preference statistic model based on relative conditional entropy is brought up in this paper to measure dependence between headword and co-occurrence words in context.

针对以往研究将搭配视为词项的简单并置，而没有考虑词项间的倾向性的问题，提出了一个基于相对条件熵的搭配倾向统计模型，衡量中心词对上下文同现词的依赖程度。

To solve the problem, the collocation preference statistic model based on relative conditional entropy is brought up to measure the dependence between headword and co-occurrence words in context.

针对以往研究将搭配视为词项的简单并置，而没有考虑词项间的倾向性问题，提出了一个基于相对条件熵的搭配倾向统计模型，衡量中心词对上下文同现词的依赖程度。

A computational mechanism for context-free language parsing is proposed in this paper, which is called role inverse algorithm.

给出了面向上下文无关语言的句法分析的一种计算机制：角色反演算法。

Keywords: Many-sorted recursive function; context-free language; algorithm; evaluation; optimization

中文关键词：多种类递归函数；上下文无关语言；算法；求值；优化

A previous text steganography scheme uses the mimic function and the Context-Free Grammar to generate pseudo-natural language text to convey secret information.

摘要基于模仿函数的Mimicry文本隐写法利用上下文无关文法构造树形结构，生成的含密仿自然文本在语义连贯性方面存在缺陷。

Many-sorted recursive function; context-free language; algorithm; evaluation; optimization

中文主题词：多种类递归函数；上下文无关语言；算法；求值；优化

Firstly, we suggest using context-free language to describe the start code string of MPEG-2 and using minimum-distance error-correcting parser to correct the errors in MPEG-2 start code string. This method hasn't been reported elsewhere. Secondly, side motion estimation rule is proposed for temporal error concealment and based on the rule, many new algorithms are proposed. Among which, the temporal error concealment method utilizing overlapped block motion compensation and side motion estimation rule has exceeded the best performance ever reported.

首先，提出用上下文无关语言描述MPEG-2起始码链，用最小距离误差校正剖析方法进行MPEG-2起始码链的识别与误差校正，该方法国际上尚未有同类报导；其次，提出了用边界运动估计准则进行时域错误掩盖，基于该准则提出了一系列新算法，其中基于重叠块运动补偿和边界运动估计准则的时域错误掩盖算法达到所有已知算法的最佳性能。

It has flexible printing options too and full context-sensitive help.

它灵活的打印选项太和完整的上下文敏感的帮助。

Comes with extensive context-sensitive help and a set of templates to build your help files.

谈到与广泛的上下文敏感的帮助和一套模板来建立您的帮助文件。

If you are unfortunate enough to the lovelorn, please tell me, I will help you out, really, please contact me!

如果你不幸失恋了，请告诉我，我会帮助你摆脱困境，真的，请联系我啦！

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放，就是一个这样的例子。