1) π mode frequency
π模频率
2) π-mode
π模
1.
N/2 zonal emitted cathodes are employed for N-cavity magnetron, which leads to the electrons gouping into N/2 electron bunches at the birth and a faster generation of theπ-mode, which suppressing the mode competition and reducing system noise.
该结构可以更快地激励π模,抑制模式竞争和降低噪声。
3) π-A-module
π-A-模
4) π-modules
π-模
1.
This paper introduces five notions, including π-algebras, π-ideals, Hopf π-algebras, π-modules and Hopf π-modules, verifies the fundamental isomorphism theorem of π-algebras and studies some algebraic properties of Hopf π-algebras as well.
引进了π-代数,π-理想,Hopfπ-代数,π-模,Hopfπ-模等概念,证明了π-代数上的基本同构定理并研究了Hopfπ-代数的一些代数性质。
2.
The first main result is the existence of the π-modules dual to π-comodules.
研究π-模与π-余模间的对偶问题,证明了(M*,(?))是π-余模(M,(?))的对偶π-模,讨论了π-子余模与π-子模之间一些对偶性质。
5) modal frequency
模态频率
1.
In this paper, a method for identification of the sectional flexural stiffness of reinforced concrete components was proposed, and a corresponding diagram for identification was plotted based on the relationship between the variations of modal frequency and flexural stiffness, thus, the flexural stiffness of corroded and cracked reinforced concrete components could be .
根据模态频率变化与弯曲刚度变化的关系,提出了锈裂钢筋混凝土结构构件截面抗弯刚度识别的方法,绘制锈裂损伤后抗弯刚度识别图,根据实测模态频率可以识别出锈裂钢筋混凝土构件抗弯刚度。
2.
Some conclusions are drawn: the modal frequency and modal loss factor of the ER beam will become bigger when the applied electric field intensity is increased.
在此基础上 ,研究了具有简单的边界条件夹层梁的动力学特性 ,得出了在外加电场作用下 ,电流变层合梁模态频率和模态损耗因子都随着电场的增大而增大 ;电流变层合梁的低阶模态损耗因子变化趋势大于高阶模态损耗因子的变化趋势 ;在同样的电场 (或电压 )作用下 ,层合梁的低阶模态损耗因子大于高阶模态损耗因子。
3.
The study results show that the Coriolis force in the sensitive direction is proportional to the electrostatic force,and inverse proportional to the driven modal frequency of the detecting mass.
分析表明:谐振状态下哥氏力与静电力成正比,与驱动模态频率成反比。
6) mode frequency
模态频率
1.
Study on electrical test method of mode frequency for capacitive MEMS devices;
电容式MEMS器件模态频率的电学测试方法研究
2.
The mode frequency relation for the resonant system is obtained analytically from the vibration equations.
研究了一种机械谐振式热声制冷机结构,建立了装置机械谐振系统的二维模型,从振动方程中分析获得了系统的模态频率关系,同时研究了振动质量、机械和气体弹簧、腔体尺寸以及工作压力等参数对模态频率的影响。
补充资料：π, π-conjugation
分子式：
CAS号：
性质：单键和双键相互交替排列的共轭体系。最简单的为1,3-丁二烯，而苯分子则是一个具有高度对称结构的闭合共轭体系。除碳碳双键外，碳碳叁键、碳氧双键等，都可组成π,π-共轭。例如：CH2＝CH—C≡CH；CH2＝CH—CH＝O。由π,π-共轭引起的使分子内能降低、键长发生平均化等电子效应，称为π,π-共轭效应。
CAS号：
性质：单键和双键相互交替排列的共轭体系。最简单的为1,3-丁二烯，而苯分子则是一个具有高度对称结构的闭合共轭体系。除碳碳双键外，碳碳叁键、碳氧双键等，都可组成π,π-共轭。例如：CH2＝CH—C≡CH；CH2＝CH—CH＝O。由π,π-共轭引起的使分子内能降低、键长发生平均化等电子效应，称为π,π-共轭效应。
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参考词条