projection of relation
英 [prəˈdʒekʃn ɒv rɪˈleɪʃn]
美 [prəˈdʒekʃn əv rɪˈleɪʃn]
【计】关系投影关系数据库内
双语例句
- A projection on a given relation, specifying attributes of that relation, produces a second relation containing only those attributes with all duplicates removed.
在给定关系上指定该关系属性的一个投影产生只包含那些属性的且重复项全已取走的第二个关系。 - Firstly, a new error estimate model& pointwise error estimate of the projection type interpolation is presented. The degree of interpolation polynomial k can increase dynamically and the relation between error coefficients and k is showed accurately.
首先，本文提出了一个新的误差估计模型&投影型插值的逐点误差估计，此估计的插值次数k可以动态增加并准确地给出误差系数与k的关系。 - The processing of projection relation mainly resolves the cutting and connecting of elements and the building of the relation list of geometry element projection.
投影关系处理主要解决线素打断与拼接、几何元素投影关系链的建立； - The theorem of projection of acceleration has been presented in this paper. According to the theorem, projection relation of acceleration of arbitrary two points on the plane figure is built.
本文提出了加速度投影定理，根据这一定理，建立了平面图形上任意两点加速度的投影关系。 - The information entropy characteristics of time projection curve and frequency projection curve of pseudo-Wigner-Ville distribution image are defined in this paper. The relation between the information entropy of time projection curve and the bolt tightness moment is descending.
在伪魏格纳分布图上提出了时间轴和频率轴投影曲线的信息熵特征，配合一阶频率矩和投影曲线标准方差来进行预紧力矩大小变化程度的检测。 - Based on the multi criteria decision theory and the vector projection, this paper introduces the principle and general steps of grey relation projection method.
介绍将多目标决策理论与矢量投影原理相结合，在工程项目评标中应用灰色关联投影法的基本原理和一般步骤。 - To analyze radial load on the damper, the radial stiffness of the damper was calculated through the force projection with an assumption of a linear relation between the force and the displacement.
在分析径向载荷时，假设力与位移成线性关系，通过力的投影合成得出阻尼器整体的径向刚度。