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cosine
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馀弦
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详细解释：
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以下为句子列表：
英文: A method that combines category-based and keyword-based concepts for a better information retrieval system is introduced.To improve document clustering,a document similarity measure based on cosine vector and keywords frequency in documents is proposed,bu
中文: 介绍了一种综合各层级分类类目和对应关键词来构造概念体系并用于改进信息检索系统效果的方法.为了改进文本聚类的效果,提出了将领域知识本体和文本关键词词频相结合的基于余弦向量的文本相似性测度方法.该本体面向特定领域,将关键词以不同权值对应于各分类类目,通过其语义知识来改进文本相似性测度以及信息检索系统的效果.进一步给出了对基于本体的相似性测度方法进行效果评价的2种策略以及该方法与经典余弦向量测度方法的比较结果.
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英文: Abstract: A method by using 8031 single-clip microprocessor to get the syntonical bit information is presented,based on the characteristic of the modulated singal in ascending cosine envelope.The timer is locked at the maximum of the wave peak.The experim
中文: 文摘:利用升余弦包络调制信号的特点，即基带信号为升余弦波，接收端可以利用这一包络，从中提取定时信息.提出了一种将时钟锁定到包络峰值最大点的单片机实现的方法，从而完成了在接收端正确提取定时信息的任务.
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英文: By applying generalized Gaussian distribution to statistically model the alternating current coefficient of discrete cosine transform, the technology of the blind image watermark is studied and the performance of the new detector is analyzed.
中文: 摘要根据数字图像离散余弦变换域交流系数的广义高斯分布模型，对盲图像水印技术进行研究，并给出了水印检测器检测性能的理论分析结果。
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英文: Data correlation coefficients were calculated and switch regions were analyzed by using two dimension discrete cosine transform (DCT) in ray-space data compression.
中文: 在光线空间的数据压缩中，计算了数据的相关系数，采用二维离散余弦变换(DCT)进行了变换域分析。
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英文: Based on the generalized sine and cosine functions in the triangular domain, the discrete generalized sine and cosine transform are defined.
中文: 在三角区域的广义正弦函数和广义余弦函数基础上，定义了三角区域的离散广义正弦变换和离散广义余弦变换。
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