概念上的

The theory of this thesis optimizes efficiency of the personal recommender system of digital library and establishes stable basis for its further research.

在概念和联系层次上，有效解决了协同过滤中用户评分数据稀疏的问题，优化了个性化推荐系统。

The concept of grid relative density and boundary point extraction technique are proposed.Based on that,a clustering algorithm based on GRD for multi-density data sets is developed.

提出网格相对密度的概念和边界点提取技术，在此基础上给出了一种多密度聚类算法。

Such roundedness may contribute to the leader of the opposition's lack of definition (" Who is David Cameron?", The Economist once asked on its cover).

如此全面或许会使人们对这位反对党领导人没有概念（"大卫·卡麦隆何许人也"——《经济学人》的封面上曾出现过这个问题）。

On the basic of analysing the definition of the domain ontology, this paper describes the rustiness domain of bearing.

在分析领域本体概念的基础上，对轴承锈蚀领域知识进行描述。

Aiming at this problem,the concept of the second order power spectrum was proposed based on the characteristic of the amplitude tune with pe- riodical notch spectrum in thin layer and theoretically researched.

为此，从薄层振幅调谐具有周期性陷频谱特征出发，提出了二阶功率谱的概念，从理论上对薄层的二阶功率谱特征进行了研究，建立了薄层厚度与二阶功率谱极大值之间的对应关系，给出了利用二阶功率谱进行薄层厚度预测的理论依据和方法，即根据薄层厚度和二阶功率谱的能量关系制作二阶功率谱图，图上强能量团对应的时间即为薄层时间厚度。

Aiming at this problem, the concept of the second order power spectrum was proposed based on the characteristic of the amplitude tune with periodical notch spectrum in thin layer and theoretically researched. The corresponding relationship between the thickness of thin layers and the maximum value of second order power spectrum was established. The theoretical criteria and method for the thickness estimation by second order power spectrum were given. The second order power spectrum map is made by the energy relationship between the thickness of thin layers and the second order power spectrum, and the time responding to strong energy on the map is the time of thin layer.

为此，从薄层振幅调谐具有周期性陷频谱特征出发，提出了二阶功率谱的概念，从理论上对薄层的二阶功率谱特征进行了研究，建立了薄层厚度与二阶功率谱极大值之间的对应关系，给出了利用二阶功率谱进行薄层厚度预测的理论依据和方法，即根据薄层厚度和二阶功率谱的能量关系制作二阶功率谱图，图上强能量团对应的时间即为薄层时间厚度。

Compared to male sub jects, females indicated higher self-conceptscores inthe areas of physical-self, ethical-self, self-satisfaction, self-action and thecompositon scores.

国小女学生的自我概念在「生理自我」、「伦理自我」、「家庭自我」、「社会自我」、「自我认定」、「自我满意」、「自我行动」及「自我总分」上，均显著优於男生。

""Sensibility"" in the history of Western philosophy is a very important concept.

"感性"在西方哲学史上是一个非常重要的概念。

The present thesis first elaborates the concept of education cost within SHEE institutions based on the generalized sense of education cost.

论文首先在教育成本概念基础上对高等教育自学考试机构教育成本的内涵进行了探讨。

BThese two groups of students have no significant differences in their performances on the fraction assortment recognition, unit commutation and simple fraction concept.

2两组学童在分数类别辨识、单位转换及简单分数概念的表现上无显著差异。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐