Thus the negative group velocity is simply an apparent velocity as we shall show from the study of energy flow.
因此，负群速度只是表观速度，能流的研究结果也证明了这一点。
Results The ultrastructure in the brain of mice in transgenic group had pathological changes compared with negative group.
结果与对照组比较，模型组小鼠海马神经细胞出现线粒体和突触损伤，血脑屏障结构异常。
HOMA-IS and HOMA-IR were successively reduced in antibody negative group, single positive group and double positive group(P<0.001).
IS指数及HOMA-IR指数在抗体阴性组、抗体单阳性组及双阳性组依次降低，差异有显著性（P<0.001）。
The expression level of CXCR3 in the lymph node-positive group was higher than that in the lymph node-negative group ( P < 0. 05 ).
乳腺癌组织中淋巴结转移阳性组CXCR3的表达率明显高于淋巴结转移阴性组（P＜0.05）；
The result shows that the edged sampling mirror and the edged vacuum window can be treated as a pair of prisms, which generates negative group velocity dispersion.
分析结果表明，带楔角的取样反射镜与后续光路中使用楔形真空窗口构成了一对棱镜，产生负的群速度色散。
The symptoms disappear after anti-precocious puberty therapy in 36 cases of the culture negative group. 4 cases with positive culture of mycoplasma were cured after therapy with erythromycin.
培养阴性组中有36例抗早熟治疗后症状消失，4例支原体培养阳性患儿经红霉素治疗后痊愈。
Experimentally, a light pulse propagating through the atomic vapor cell has its peak reaching the exit side before entering it, resulting in a negative transit time, and negative group velocity.
研究发现，当光脉冲通过一个原子气室时，在进入前其峰即到达出口处，造成负渡越时间和负群速。
The article discusses the differences in physical mechanism of mode locking by laser pulse injection between the dispersion region at positive group velocity and that at negative group velocity.
本文阐述工作于正、负群速色散区中的光脉冲注入锁模的物理机制的区别。
The article discusses the differences in physical mechanism of mode locking by laser pulse injection between the dispersion region at positive group velocity and that at negative group velocity.
本文阐述工作于正、负群速色散区中的光脉冲注入锁模的物理机制的区别。
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