Industry analysis, in 2004 and 2003, compared to sharp drop in land, the impact of fiscal revenue is very obvious reasons.
行业分析，在2004年和2003年相比，急剧下降的土地，财政收入的影响是非常明显的原因。
In order to predict failure location of BGA lead-free solder joints under a drop impact, ABAQUS software is used to analysis stress distribution of the solder joints.
为了预测跌落碰撞下球栅阵列(BGA)封装中无铅焊点的失效，采用ABAQUS软件来模拟跌落碰撞过程中焊点的应力分布。
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