When the coefficients of quadratic equations were irrational numbers, Abu Kdmil abandoned the geometry demonstration showing the trend of arithmetization.

而且，当遇到具数的方程时，作者放弃了几何证明，具有明显的算术化趋势。

To improve the robustness of the Minimum Variance Distortionless Response (MVDR) beamforming to the array steering vector, a quadratic constraint method is proposed.

提出了一种基于阵列指向性二次约束的优化算法，以提高最小方差畸变响应（MVDR）波束形成对方向矢量的稳健性。

Based on the geochemical data of the long regional profile in western Jiangxi and using quadratic arithmetic average and correlation analysis,orebearing features of strata are discussed in this paper.

本文以赣西地长剖面的地球化学测量数据为基础，运用二次算术平均及相关分析方法，探讨了地层含矿性。