余弦

We use vector space model to denote the groups interest and the returning documents into vector {(k1,V2),(k2,v2)...}, then we can calculate the similarity between them using the formula of cosine. The biggest former N pages will be pushed to group.

使用向量空间模型将用户的兴趣以及得到的文档表示成为向量形式{(k1，v2)，(k2，v2)…}，并使用夹角余弦公式计算两者之间的相似度，将相似度最大的前N篇文档推送给用户。

The main contribution of this thesis is that we propose a collaborative filtering recommendation algorithm based on double clustering. This approach first respectively clusters resources and users by the users rating on items, then makes a collaborative filtering recommendation based on the clustering result. The new algorithm can shorten on-line recommendation time. Then, we apply the classical formula of cosine correlation to double clustering algorithm, leaving out the standardization operation. In the end, we implement an educational resource recommender system according to the need of the actual project and the result is positive.

本文的主要意义在于，首先运用聚类技术对用户和资源分别进行聚类，然后利用聚类结果进行协同过滤推荐，由于聚类部分离线周期进行，大大缩短了在线的推荐时间；然后将经典的余弦相似性计算公式运用到双重聚类算法中，省去规范化处理操作，减少运算量；最后结合实际的需要，实现一个资源推荐系统。

In this paper,the application of the algorithm in pattern transformation method with cosine function is also discussed.

同时本文还讨论了该算法模型在余弦整形变换系统上的实现，其处理速度较原算法有了成倍提高。

It was found that the transmission spectrum of the filter is the cosine function modulated reflection spectrum of the fiber grating.

结果表明该滤波器的透射光谱是余弦函数调制后的光纤光栅反射光谱。

Modified cosine function is used to compute similarity.

同时，本文提出为适应设计领域的具体特点，采用修正的余弦函数算法进行相似度的计算。

Equation with double cosine function can improve the accuracy of prediction when facing two peak time series data .

含有第二谐量的余弦方程能够更准确地描述具有两个高峰的周期性数据。

The expressions of radial pressure distribution on the piston rings with non- cosine function and their characteristics are studied in detail in this paper.

本文分析了非仅用余弦函数表达活塞环径向压力分布的方式及有关这种表达式的特性。

It makes no sense to ask where the cosine function is. Or if it does make sense to ask, the only sensible answer is that it is nowhere.

追问余弦函数在哪里，是没有意义的；或者，如果追问确实有意义，那仅有的回答是"它不在任何地方"。

The value of the cosine function at argument x.

参数为x的情形下余弦（在原正弦函数中x取余角）函数的数值。

The use of a simple arctangent look-up table method and positive, cosine function, the processing speed of microcontroller programming unpleasant, this is a method used.

详细说明：一个简单的利用查表法的反正切和正、余弦函数，在处理速度不快的单片机编程中，这是一个使用的方法。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。