In information retrieval, vector space model is one of significant mathematics tools.
在信息检索中，向量空间模型是最有效的数学工具之一。
Structural parameters with uncertain but bounded parameters are described by a hypercube-an interval vector in interval mathematics and by ellipsoid in convex models.
区间数学将有界不确定结构参数用超长方体即区间向量进行定量化，而凸模型理论则用椭球对有界不确定参数进行定量化。
The vector theory is one of the important achievements of the domain of mathematics and physics in the second half of the 19th century.
向量理论是19世纪后半叶数学和物理学领域取得的重要成就之一。
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