查询词典 structure constant

A suspensor-like structure was formed on the bottom of the proembryo. Along with the constant growth of the proembryo, its shape converted from long-ellipse to obovate, at last it evolved as a globular embryo with smooth surface, and there were absciss layer in the joint of the bottom of suspensor and matrix tissue.

随着原胚不断生长，其形状由长椭圆形发展成倒卵形，最后逐渐形成表面较光滑、外观近球形的球形胚，并在'胚柄'基部与母体组织连接处形成离层。

The film annealed in air is similar to silicon dioxide in structure. The appearance of polar bond Si-OH and the shrinkage of film cause the increase of dielectric constant.

大气条件下退火的薄膜样品以类SiO_2结构为主，强极性Si-OH键的生成和薄膜的剧烈收缩导致介电常数的上升。

In this paper, through a series of experiments, two series of quaternary-ammounium Gemini surfactants were synthesized, namely the pair alkylene double quaternary ammonium salt surfactant m-s-m·2Br and the pair the alkylene double quaternary ammonium salt surfactant -s-·2Br. We has carried on the attribute with the infrared spectrum to its structure, and to affected the factor which the synthesis pair the alkylene double quaternary ammonium salt surfactant responded to carry on the discussion. We has discovered the synthesis pair the ethylene double quaternary ammonium salt surfactant m-2-m·2Br optimum condition: The bromo alkane and a tetramethyl ethylene diamine mole of ratio is 3.0: 1.0, makes the solvent by the ethyl alcohol, 80℃ under responds for 48 hours in the backflow temperature; Synthesis pair alkylene double quaternary ammonium salt surfactant 12-S-12 ·2Br optimum condition: 12 tertiary amine and 1, 3- propylene dibromide (1, 4- two bromines butane) a mole of ratio is 2.2: 1.0, makes the solvent by the ethyl alcohol, responds for 48 hours in the constant temperature 80 ℃ under backflow.

本文通过一系列的实验，合成了两个系列的Gemini型表面活性剂，即双烷撑双季铵盐表面活性剂m-s-m·2Br和双烷撑双季铵盐表面活性剂-s-·2Br，用红外光谱对其结构进行了表征，并且对影响合成双烷撑双季铵盐表面活性剂反应的因素进行了讨论，找出了合成双乙撑双季铵盐表面活性剂m-2-m·2Br的最佳条件：溴代烷与四甲基乙二胺的摩尔比为3.0：1.0，以乙醇作溶剂，在回流温度80℃下反应48小时；合成双烷撑双季铵盐表面活性剂12-s-12·2Br的最佳条件：十二叔胺与1，3-二溴丙烷(1，4-二溴丁烷)摩尔比为2.2：1.0，以乙醇作溶剂，在恒温80℃下回流反应48小时。

Paper studies the practical stability of electricity market models by tools, for example, the appropriate structure Lyapunov functions, Cauchy matrix, the matrix measure, constant variation. Judging practical stability sufficient conditions and estimating formula of ultimate convergence boundary are provided. Conditions are descriptive by coefficients of models. At the same time, paper studies the Lyapunov stability of the electricity market. As well as the sufficient conditions of judging electricity market Lyapunov stability are provided. Some of conclusions improved the results of Alvarado and others. The conclusion of Lyapunov stability has made a comparative with practical results.

首次将实用稳定性理论和方法应用于电力市场稳定性的研究中，借助于构造合适的Lyapunov函数、柯西矩阵、矩阵测度、常数变易法等工具，系统研究了所建电力市场模型的实用稳定性，得到了用模型的系数来描述其实用稳定性的一系列判定条件和最终收敛边界的估计公式；同时对电力市场的Lyapunov稳定性进行了研究，得到了电力市场稳定性的若干判据，部分结论改进了Alvarado等人的结果；随后将Lyapunov稳定的结果与实用稳定进行了比较。

Based on the temperature-dependent complex dielectric constant of Indium Antimonide, an InSb-dielectric-InSb plasmonic waveguide structure with the grating is proposed. At the frequency of 1 THz, a directional beam is obtained, and its radiation direction can be controlled by changing the temperature difference between the grating structures on each side.

本文根据锑化铟材料在THz波段下复介电常数对温度的响应特性，采用了带有光栅的锑化铟-介质-锑化铟的表面等离子体波导结构，实现了1THz频率光束的准直出射，并能够通过调整结构两侧光栅的温度差来控制出射光束的角度。

The lattice constant, atomic moment and the anisotropic magnetostriction exhibit abrupt changes at about 42 K, which is connected with the first-order structural transition and indicative of a strong coupling between magnetism and crystal structure.

晶格常数、磁矩和各向异性磁致伸缩常数在42K都有一个迅速跳变，这与一级结构相变密切相关。

The filled skutterudite compound possesses bcc structure as evidenced by electron diffraction analysis. Powder X-ray diffraction data of filled skutterudite samples were characterized by Rietveld method for some crystallographic parameters such as lattice constant, atomic occupation, atomic position, etc.

另外，通过对化合物电子衍射的分析证实了〓化合物是一种具有bcc结构的化合物；运用Rietveld方法对填充skutterudite化合物X衍射谱线进行了分析，对化合物的晶格常数、原子位置的占有率以及原子位置坐标等晶体学参数进行了表征。

One mole of any substance contained in the structure of particles is equal to Avogadro's constant.

一摩尔任何物质所包含的结构粒子数都等于阿伏伽德罗常量。

XRD and TEM data indicated that the crystal has cubic structure of blende with cell constant of α＝0.5390 nm in the range of 250～300 nm.

由XRD和TEM的结果显示，其结构为立方闪锌矿，晶格常数为α＝0.5390 nm。

The infection of the reaction rate of the virous monomers was reviewed respectively by the different THF dosage, TMEDA dosage, t-BuOK dosage, t-AmOK dosage and different temperature. The monomers apparent reaction rate constant was obtained.And the polymer composition at different conversion was reviewed, too.The effect of modifier and temperature on heat effect was also studied. In addition, the sequence structure and microstructure of the terpolymer was reviewed at different modifier dosage, and the structure was characterized by the ~1H—NMR.

分别考察了不同THF、TMEDA、t-BuOK、t-AmOK加入量以及聚合温度对各单体及总的反应速率的影响规律，得到了各单体及总的表观反应速率常数，求得了不同转化率下各单体在共聚物中的分布情况，同时考察了调节剂加入量对聚合温升热效应的影响规律；研究了在三种聚合体系下，通过~1H—NMR对共聚物的结构进行了表征，分别考察了不同调节剂加入量对共聚物的序列结构及微观结构的影响规律。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。