The line sink drainage element method was proposed to solve the problem that small FEM grid was needed near drainage holes due to the high hydraulic gradient at the cost of time consuming.
为模拟排水效应并解决排水孔附近水头梯度大、有限元网格划分细而显著增加计算量的问题，提出了汇线单元法。
METHODS: Searching for gradient profile and column temperature by grid rake techniques on different band C-18 columns and HPLC instruments.
方法：在不同品牌的HPLC仪器和十八烷基硅烷键合硅胶色谱柱上，对梯度条件和柱温进行网格搜索。
The plasma potential gradient across the grid and the hot-filament draws ions from the plasma towards the filaments.
等离子体的电位梯度跨越栅极，热灯丝将从等子体中抽取的离子超向灯丝。
The plasma potential gradient across the grid and the hot-filament draws ions from the plasma towards the filaments.
等离子体的电位梯度跨越栅极，热灯丝将从等子体中抽取的离子超向灯丝。
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