Based on the theory of quantitative risk assessment, a regional risk assessment (RRA) methods put forward.

基于定量风险评价的基本原理，提出一种区域风险评价方法。

Based on the theory of quantitative risk assessment, a regional risk assessment (RRA) method was put forward.

基于定量风险评价的基本原理，提出一种区域风险评价方法。

The robust regression analysis (RRA) is such one kind quite commonly used and the effective data actuation method.

稳健回归分析(RRA)，就是这样一种相当常用与有效的数据驱动方法。

T73 and RRA treatment improve the grain boundary character, which is help to inhibit hydrogen embrittlement and decrease anodic dissolution rate, then to improve the SCCR of the alloy.

T73和RRA时效处理改善了合金晶界特性，有助于阻止氢脆、减缓晶界阳极溶解速度，提高合金的抗应力腐蚀能力。

This experiments studies on the changes of plant endogenous hormones of different alfalfa cultivars with different root regeneration ability(RRA)before and after their taproot were pruned.

研究根系发育能力不同的苜蓿品种在主根受伤后内源激素的变化。