The second, embedded combination of sum and EXTRACT function calculates the lower boundary, which is based on the sum of values in preceding slices, represented in the map rule as InSliceIndex - 1.
嵌套的第二个SUM和EXTRACT函数组合计算下限，下限基于前面的片中的值的总数，在映射规则中表示为InSlice Index - 1。
2
A complete multi-particle collision rule was established, and a method for dealing with viscous and thermal boundary was provided in the present model.
采用二维九速的格子气模型模拟热声振荡，建立了完备的多体碰撞规则，提供了粘性和热边界的处理方法。
3
By using the boundary locus method, the delay-dependent stability region of the trapezium rule is analyzed and its boundary is found.