Then the PIB model is expanded to the case of multiple species in multiple tier system.
运用“箱中粒子”模型 ( PIB)对空间碎片环境的演变趋势进行了研究。
Research on Medium-granularity Dynamic Update with Semantics Considered;
语义相关的中粒度动态更新技术研究
The influences of the series connection seperation equipment on the overflow flux and sediments half-content diameter D50 were studied by orthogonal test, range analysis and variance analysis.