推荐系统

However, keywords can only represent the simple content, which easily dissever the relevancy of the content The deep-content representation and application are not developed, so semantic navigation is not satisfied at present. Time mechanism is a kind of navigation mechanisms that uses time for the signpost, and determines navigation route according to the time of occurrence.

时序机制指以时间为导航路标、根据事物发生的时间顺序确定访问路径的一种导航机制，主要应用于WWW信息空间中以时问顺序为线索组织信息的结构中；空间机制指依据对象间的空间关联，为用户指引路径，提供导航路标的机制，应用于具有空间特征的结构中；社会机制指利用先行者的经验、建议为后来者指引路径的行为，原来主要应用在推荐系统、协作系统中，目前已经在主流的信息检索系统中得到了应用，如在CNKl知识网络服务平台（CNS 5.0）中的应用。

Recommendation system is one of the most important technologies in E-commerce.

推荐系统是电子商务系统中最重要的技术之一。

In order to make the problems solved and improve the quality and efficient of recommender systems, some researches have been done, and the research results have been successfully applied in practice.

为了迎接这种挑战，提高推荐系统的推荐质量和实时性，目前国内外进行了较多的研究，其成果也在实际中得到了一定的应用。

Collaborative filtering is a successful technology that is implemented in E-commerce recommender systems today.

协同过滤是目前在电子商务推荐系统中应用较为成功的个性化推荐技术。

Collaborative filtering is the most successful recommender system technology to date. It has been shown to produce high quality recommendations, but the performance degrades with the number of customers and products.

协同过滤是迄今为止最成功的推荐系统，它可以产生高质量的推荐，但是其性能随着客户和产品数目的增加而下降。

However, there remain important research questions in overcoming two fundamental challenges for CF Recommender systems.

但是，在克服CF推荐系统的算法可伸缩性和推荐质量这两个根本性挑战方面还存在许多问题。

Recommender systems may be used to analyze the preference of customer, recommend product to targeted customer.

电子商务网站可以使用推荐系统分析客户的消费偏好，向每个客户具有针对性地推荐商品。

Experiments show the proposed algorithm can improve data sparsity and scalability of traditional collaborative filtering and provide a better recommendation.

实验结果表明，该算法改善了协同过滤算法的数据稀疏性和可扩展性问题，提高了推荐系统的推荐质量。

Com and National Library of China , this paper compares them from six aspects : useful , usable , desirable , findable , accessible and credible .

本文通过对豆瓣网和中国国家图书馆的网上书目推荐服务的调查，从有用性，易用性，满意度，可找到性，普及性和可靠性六个方面对它们进行了比较，概括了传统型网上书目推荐系统的优势和改进意见。

According to the problems of recommendation quality and real time requirement, the system must be built more reasonably.

针对推荐质量和实时性要求，构建合理的推荐系统。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。