适量
Conventional methods that are on basis of refraction arrival time or microlog cannot yield proper LVZ velocity or static quantities in areas with complex near surface conditions.
常规的(基于折射波到达时或者微测井等)方法在复杂近地表条件下很难求得正确的低速带速度和静校正量。
By controlling the processing parameters, loose density of the powders and adding element Nd in proper quantities, low cost HDH titanium alloy powders can be used instead of expensive sphere powders in some conditions.
通过合理控制松装密度、添加适量稀土元素以及优化工艺参数,在特定的应用需求下,低成本HDH钛合金粉末能够代替昂贵的球形粉末在激光快速成形技术中使用。
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