optional sampling是什么意思

用法例句

Boundary element method for pressure calculation of arbitrary shape and mixed boundary reservoir;

用边界元法计算任意形状混合边界的油藏压力

Model constitution and correction of arbitrary shape scattering object;

任意形状散射体模型的建立和修正

The methods are verified against analytical solution for simplified rectangular and round reservoirs, so pressure-transient behaviors characters in two-dimension homogeneous reservoir with arbitrary shape are calculated.

以任意形状二维均质油藏的定解问题为基本的数学模型,推导了实空间和拉氏空间中的边界元数值计算方法。

Reliability optimization design of overhead traveling crane with arbitrary distribution parameters;

任意分布参数的桥式起重机的可靠性优化设计

The equipment battlefield repair systems model was set based on arbitrary distribution stochastic Petri nets.

基于任意分布随机Petri网(ASPN),建立了装备战场抢修系统的ASPN模型。