查询词典 propagation medium

The light propagation within an absorbing medium and the reflection and refraction at the interface of two absorbing media are studied.

本文研究吸收介质中光传播和吸收介质界面上的反射和折射。

Group velocity of the optical pulse propagation would be reduced based on coherent population oscillation effect in an absorbing medium.

由于相干布居振荡效应，光脉冲通过处于吸收状态的掺铒光纤介质时，将导致群速度传输减慢。

To establish a new technique for in vitro rapid propagation and conservation of germplasm of autotetraploid plant of Plalycodon grandiflorum, basal MS medium supplemented with different hormones was filtrated and optimized by using uniform design and orthogonal design.

为了建立优良同源四倍体桔梗的快速繁殖和离体保存技术，采用均匀设计和正交设计以添加不同激素的MS培养基为基本培养基进行筛选和优化。

And third, in fractured medium with a tilted axis of symmetry , the elastic parameters and the phase velocities of waves in this medium are gained for analyzing the law of wave propagation.

倾斜裂隙介质，分析了该类介质的弹性参数，模拟了三类波的相速度面，分析了波的传播规律。

The results show that in order to obtain optimal propagation results, the optimal pH is 7.0, the temperature is 28℃, the carbon source in culture medium is corn, the nitrogen source culture medium is barm.

结果表明：pH值7.0，温度28℃最适合HDF01的生长。培养基中以玉米粉为碳源，酵母粉为氮源，加入微量元素Mn及雄生素B6，HDF01的产孢量最高。

According to periodic boundary conditions, one unit cell has been isolated as the calculation region, and the method of lines is used to get the propagation equation of potential function in different interfaces of medium layers.

王瑞 西北大学信息科学与技术学院，西安 710127郑秋容空军工程大学电讯工程学院，西安 710077运用直线法对含有不同参数支撑介质的平面型电磁带隙结构进行了分析。

In conclusion, the lag phase of Streptococcus thermophilus was shorten in the eutrophy culture medium, and the time achieving the culminated point of logarithmic phase was shorted also, at the same time, the stationary phase lengthened. After secondary culture, Streptococcus thermophilus reached directly the log phase hardly through the lag phase, and then quickly reached the decline phase. There were more relations of the metabolic regalities of the three kinds of nutritive substances with the super-concentrated incubation process of Streptococcus thermophilus: the more the number of the bacteria, the quicker the metaboling, while the fewer, the slower the metabolism. Moreover, there apparently existed morphologic changes in this course, and there maybe existed the apoptosis, which correlated with bacteria propagation and acid producing. With the culture time postponed, the nutritive substances in the culture medium lacked also, and the morphologic change and apoptosis appeared more obviously.

结果表明，嗜热链球菌在营养丰富的培养基中的生长延滞期缩短，到达对数生长顶点的时间变短，稳定期的时间延长，当经过二次培养后，嗜热链球菌几乎不经过延滞期直接到达对数期，平稳期持续的时间较短，很快到达衰亡期；嗜热链球菌在超浓缩培养过程中三大营养物质的代谢规律也同它的培养过程有很大的关系，菌数多，其代谢旺盛，菌数降低其代谢速度减慢；嗜热链球菌在超浓缩培养过程中存在着明显的菌体形态变化，并可能存在着细胞凋亡，与菌体增殖和产酸规律密切相关，随着培养时间延长，培养基中营养物质变得贫乏，菌体形态变化和细胞凋亡的情况愈加明显。

An all - pervading,infinitely elastic,massless medium formerly postulated as the medium of propagation of electromagnetic waves.

大体上达到人均四千美元，做到这一步，中国就达到中等发达的水平。

With the protocorms of C. grandiflorium as inoculated materials and MS as basic medium, different combinations of growth regulating substances with different concentrations and different hormone proportions were designed to discuss the effects of different medium on the protocorm propagation, bud induction and rooting of C. grandiflorium and the effects of different hormone matching on the formation of roots.

方法］以大花蕙兰的原球茎为接种材料，以MS为基本培养基，设计不同生长调节物质浓度的组合、不同激素配比，探讨了不同培养基对大花蕙兰原球茎增殖、诱导芽及生根的影响和不同激素配比对形成根的影响。

Wave propagation in a micropolar medium is more complicated than in a linear elastic medium, with two coupled wave equations.

在微极介质中波的传播路径要符合两个耦合波方程，这比在线弹性介质中复杂得多。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失