heart shadow是什么意思

用法例句

Aiming at the envi- ronmental factors of eccentric effect for LWD density logging,three kinds of interval correction models of circle,ellipse and trough are es- tablished to realize the eccentric effect correction.

本文针对随钻密度测井受偏心等环境因素的影响,建立了圆形、椭圆形和槽型三种间隙校正模型,进而实现随钻密度测井资料的偏心影响校正。

Strengthen the Academic Works to Enhance the Key Influence——Towards the Future s Architectural Education in Tongji University;

加强学科建设,提升核心影响力——面向未来的同济建筑教育

The eccentric influence factor α in the present tunnel specifications is used to express the extent of decreasing of compression strength of the eccentric loading plain concrete element in accordance with the increasing of the eccentric distances .

现行隧道设计规范用偏心影响系数α表征偏压构件抗压强度随偏心距增加而降低的程度，引入可靠度设计时必须知道此系数的统计特征及计算公式的不确定性。