查询词典 propagation

The photon propagation model and photon propagation rule are two key components of bioluminescent imaging.

研究生物组织中的光子传输模型和光子传输规律，是开展在体生物光学成像研究的两个关键环节。

Objective To study the condition for induction and differentiation of callus and propagation of adventitious buds in lamina,stem,and bud of Bupleurum chinese and establish a new method for rapid propagation.

目的研究北柴胡叶片、茎段和花芽愈伤组织诱导、分化和不定芽增殖的条件，探讨快速繁殖的新途径。

Caudatum was studied. 0.05 mg/L could be the critical mass concn. of P. caudatum fitting to Cu(superscript 2+).Below this concn., the polysaccharide content in P. caudatum was increased in a small range with the increment of mass concn. of Cu(superscript 2+),then the growth and propagation of P. caudatum was strengthened and above this concn., the polysaccharide content was decreased significantly with the increment of mass concn. of Cu(superscript 2+), then the growth and propagation of P. caudatum began to be restrained obviously and the poison was more obvious when the concn.

结果］0.05 mg/L可能是大草履虫适应Cu(上标 2+)的临界质量浓度，低于此浓度时，大草履虫体内的多糖含量随着Cu(上标 2+)质量浓度增大而呈现小幅度的增高，大草履虫的生长繁殖得到增强，高于此浓度时，大草履虫体内的多糖含量随着Cu(上标 2+)质量浓度增大而显著地降低，大草履虫生长繁殖开始明显受到抑制，且浓度越高受毒害越明显。

But the back propagation algorithm often gets into the minimum value and its constringent speed is slow. Aim at the gases, we design a optimum back propagation algorithm.

传统的前馈神经网络多采用误差反传学习算法对网络进行训练，但是误差反传学习算法具有容易陷入局部极小值，收敛速度慢以及容易导致震荡等缺点。

It is suggested that how to increase propagation coefficient effectively is an urgent task; cutting, tissue culture and other methods which propagate fast are effective ways in Corylus heterophylla propagation.

认为如何有效地提高榛子的繁殖系数，是榛子繁殖亟待解决的问题；繁殖速度快的扦插、组织培养等繁殖方法将成为解决榛子繁殖难题的有效途径。

Corylus heterophylla vegetative propagation was relatively difficult, layering method was mainly used at present, but low coefficient of propagation limited mass production of its seedlings.

榛子是一种无性繁殖相对困难的树种，目前主要采用压条法进行繁殖，繁殖系数低，这限制了榛子苗的大量生产。

The propagation modes in the lenslike medium , including the spot size, field distribution pattern and their propagation constant,are obtained by solving the Helmholtz equation in the cylindrical coordinate.

从求解柱坐标内亥姆霍兹方程出发，导出了类透镜介质传导模的特征参量、场分布状态及传播常数，求出了入射激光束和导模之间的耦合系数，并讨论了它们的物理意义。

Since the only propagation place in Xingrentuozi on Shicheng Islands along seashores of Huanghai Sea in China were found in 1999,observation and studies on propagation,hibernation and migration of Platalea minor were conducted,and meanwhile investigation was carried out on some isles along seashores of Huanghai Sea in Liaoning each year.

自1999年在辽宁省黄海沿岸的石城岛形人坨子上发现了中国的唯一繁殖地以来，作者对黑脸琵鹭的繁殖、越冬和迁徙进行了观察和研究，同时每年都对辽宁黄海沿岸的一些岛坨进行调查，在2007年6月又在距第1处繁殖地东南3n mile的元宝坨子上发现了第2处黑脸琵鹭繁殖地。

Exogenous fault mechanics model characterizes wave making vibration propagation process caused by structural defects, defines transmission and reflection property of stress wave during the propagation, and provides theoretical basis for determining and seperating various kinds of polygenetic wave speed, which can be used in inversion and location of structural fault with satisfaction. By comprehensively using the two types of fault model that we presented, this paper has satisfactorily solved the classification and recognition of polygenetic faults of rotary support.

内源性故障力学模型较好地说明了回转支承内部的各种故障的形成和发展机理，描述了故障存在时回转支承的振动激励响应特性，为多源故障信号的分类识别提供了一种理论模型，外源性故障力学模型描述了由结构缺陷引起的波致振动传播过程，解释了传播过程中应力波的传递与反射特性，为各类故障波速的确定与分离提供了理论基础，能较好地用于结构故障的反演与定位。

Results The proper media for protocorm inducing, propagation and rooting were found in this paper, rapid propagation system of I.

结果 通过研究，筛选出了丽江山慈姑原球茎的诱导、增殖及生根培养基配方，建立了丽江山慈姑的快速繁殖体系，实现了大规模的组培生产。

As of Tuesday, Google's results were still censored in China.

截至周二，谷歌的搜索结果仍受中国审查。

In order to make the positive action increase and negative one decrease, the sub-forces of the social factors must be adjusted to form a centripetal force.

在这一过程中，人的主体性发挥是社会有机体健康发展的灵魂。