In recent years, commodity exchanges have built up their technologies to allow easier access for computer-based traders, which have become a dominant force in some markets.
近年来,各商品交易所已开发出能让使用电脑的交易员更便捷进行交易的技术,这类交易员在一些市场上已经成为主导力量。
Metbods: a two dimensional finite element model was built up to analyse the stress within the periodontal tissue of the first molar, with a reduced tooth eruption-resistant force.
方法:用二维有限元法分析阻萌力减少前后下第一磨牙牙周组织内应力分布的变化。
Based on the force analysis of single bubble movement and movement characteristic research of many bubbles in random time section, the mathematics modeling of many bubbles movement was built up.
在对水下单气泡运动受力分析及任意时间剖面多气泡运动特性研究的基础上,建立了水下气泡群运动数学模型。
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