appr approximate 近似 ; 大约
PERF APPR 性能进近
sparse appr 稀疏近似逆预条件子
appr-cvp 接近最近向量困难问题
VFR APPR 目视飞行规则进近
The measured radiation patterns satisfy the requirements of beam shaping well, which demonstrates the effectiveness of this appr…
天线的实测方向图完全符合赋形波束的要求，表明该设计方法是可行的。
Taking the establishment of the fare clearing system in Guangzhou metro as an example, the paper introduces the ideas and appr...
以广州地铁清分系统的建设为例，重点介绍轨道交通票务清分体系的建设思路与方法。
Results show that the ratio of calculated time to measured value is less than 2. After the modification of constrained cavity growth model, the calculated rupture time further appr...
采用受约束蠕变孔洞生长模型计算了不同试验条件下t 91钢的蠕变断裂时间，计算值与实测值相差不到2倍。
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