1)  four-membered ring
四元坏
2)  quaternary
四元
1.
Three series of quaternary rare earth complexes [Ln( x MBA) 2(NO 3)(Phen)] 2(Ln=La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Er;MBA=CH 3C 6H 4COO -)were synthesized in ethanol/water solution system with slight acidity, the products were characterized by elemental analysis, IR,UV,DTA TG and 1H NMR, the ESR spectra of three Gd complexes and fluorescence spectra of three Eu complexes were determined.
在酸性介质 ,乙醇 /水混合溶剂中合成得到了三个系列的四元混配配合物 [Ln(x- MBA) 2(NO3) (Phen) ]2 (Ln=La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Er;MBA=CH3C6H4 COO-)。
3)  Quaternion
四元数
1.
Solution of Forecasting-Correcting-Improving Algorithm to Quaternion Differential Equation of SINS Attitude;
基于预测-校正-改进算法解算SINS姿态的四元数微分方程
2.
Research on the Quaternion Feedback Linearization for Spacecraft Attitude Control;
基于四元数反馈线性化的飞行器姿态控制方法研究
3.
Cubic nonlinear phase coupling analyse of two-dimensional harmonic based on quaternion;
基于四元数模型的二维三次非线性相位耦合频率估计方法
4)  Quaternary system
四元体系
1.
Study on metastable phase equilibrium of quaternary system Li~+,K~+//CO_3~(2-),B_4O_7~(2-)-H_2O273K;
四元体系Li~+,K~+//CO_3~(2-),B_4O_7~(2-)-H_2O273K介稳相平衡研究
2.
The equilibrium solubilities and phase diagram of the quaternary system KVO3-NaVO3-CO(NH2)2-H2O at 298 K are studied by isothermal dissolution equilibrium method.
作者采用等温溶解平衡法研究了KVO3-NaVO3-CO(NH2)2-H2O四元体系298 K时的溶解度相关系,考察了钾、钠、脲素等共存离子或盐类同偏钒酸根离子的相互作用。
3.
The solubility of saturated solutions of quaternary system RbCl-CeCl3-HCl-H2O at 25 ℃ was determined and the corresponding equilibrium diagram was constructed.
测定了四元体系RbCl-CeCl3-HCl-H2O在25℃时的溶度数据,绘制了相应的溶度图。
5)  tetracarboxylic acid
四元羧酸
1.
Europium and terbium rare earth complexes with tetracarboxylic acid were successfully prepared in aqueous solution.
在水溶液中合成了铕和铽的四元羧酸稀土配合物。
6)  four-factor entrapping
四元成藏
1.
"Multi-factor controlling,four-factor entrapping and key-factor enrichment" of stratigraphic-lithologic reservoirs and exploration practice in Erlian Basin (Ⅰ)——"Multi-factor controlling" mechanism;
二连盆地地层岩性油藏“多元控砂—四元成藏—主元富集”与勘探实践(Ⅰ)——“多元控砂”机理
2.
"Multi-factor controlling,four-factor entrapping and key-factor enrichment"of stratigraphic-lithologic reservoirs and exploration practice in Erlian Basin(Ⅱ)——"Four-factor entrapping"mechanism;
二连盆地地层岩性油藏“多元控砂—四元成藏—主元富集”与勘探实践(Ⅱ)——“四元成藏”机理
参考词条
补充资料:四法不坏
【四法不坏】
 (术语)正受心,金刚,佛舍利与光音天宫殿之四法不坏灭,谓之四法不坏。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。