At relatively high pressure, in addition to electromagnetic field and electron's Coulomb scattering by gas molecules, plasma instability would result in decrease of propagation efficiency.

而较高气压时，束电子除受自身电磁场作用及库仑碰撞散射外，等离子体不稳定性使束流传输效率明显降低。

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Scattered particle detecting efficiency must be raised in order to improve the image quality of Compton scattering imaging.

为改善康普顿背散射成象技术图象，必须提高散射粒子的检测效率。

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The method can be implemented with great efficiency in numerically simulation for the reason of mesh division can be made in scattering region instead of whole computational domain.

在数值计算中，该方程方法只需将散射体进行剖分，而不必将剖分推至整个计算域内进行，计算效率较高。

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