back-scattering是什么意思

用法例句

Topology optimization of tunnel support using reverse evolutionary structural optimization method;

用反向渐进结构优化方法研究洞室支护优化

The span of reverse cumulation and the generated spaces;

反向累加生成及其生成空间

Objective To study left lung inverse circulation (LLIC) reversing pulmonary hypertension(PH ) in canines.

目的探讨左肺反向循环 (LLIC)逆转肺动脉高压的机制。

In this paper,inverse Steffensen s inequality is given and two extensions of it s is proved.

给出了反向Steffensen不等式及其推广形

A definition of accumulated generating operation in opposite direction is posed in this paper corresponding to traditional accumulated generating operation, gives a grey model GOM(1,1), provides a new generating method to grey modeling.

相对于传统的累加生成提出了反向累加生成的定义 ,给出了灰色 GOM(1,1)模型 ,为灰色建模提供了新的生成方