Considered the effects of some factors,Boundary Element Method(BEM) was adopted to calculate barrier properties with different top shapes.
考虑各种变化因素(表面声学特性、频率等)的影响,应用边界元方法对不同顶端结构的声屏障降噪性能进行了计算研究。
The top control of pollution sources and the end managing of pollution water is the key technique for the restoration of lake ecosystem.
对污染源的顶端控制和水体污染的末端治理是恢复退化生态的关键技术。
Hydrogen accumulation near notch tip of austenitic steel 21Cr7Ni9MnN under Ⅰ+Ⅱ mixed mode loading has been studied by KYKY ion microprode mass analyser (IMMA) and ADINA non─linear finite element quantitive compution.
利用ＫＹＫＹ离子探针微分析仪和有限元定量计算发现，２１Ｃｒ７Ｎｉ９ＭｎＮ奥氏体钢在复合型（Ⅰ＋Ⅱ）载荷下，缺口顶端无论在开裂方向还是塑性区尺寸最大方向上，皆有两个氢浓度的富集峰，且随着Ⅱ型分量的增加，远离缺口的氢富集峰有下降且移向缺口顶端的趋势。
