Super particle model is used to compute the 3-d space charge forces based on PIC.
基于粒子模拟方法，对三维空间电荷力的计算采用全三维塑性宏粒子模型。
The mathematics model for the relationships among soil available water content with soil texture, particle diameter and dosage of super absorbent ploymer(SAP) was deduced.
结果表明：土壤质地、保水剂用量对土壤有效水含量的影响达到极显著水平，而保水剂粒径对土壤有效水含量的影响不显著。
The mathematics model for the relationships among soil available water content with soil texture, particle diameter and dosage of super absorbent ploymer(SAP) was deduced.
结果表明：土壤质地、保水剂用量对土壤有效水含量的影响达到极显著水平，而保水剂粒径对土壤有效水含量的影响不显著。
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