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1)  commutativity [kə,mju:tə'tiviti]
交换性
1.
A commutativity theorem of semi-prime rings;
半质环的一个交换性定理
2.
A commutativity theorem for Jacobson semi-simple rings;
Jacobson半单纯环的一个交换性定理
2)  exchangeable aluminum
交换性铝
1.
pH and the exchangeable aluminum content in acid soils as affected by parent materials and cropping systems;
成土母质和种植制度对土壤pH和交换性铝的影响
2.
This paper deals with the effect of organic matter and CaCO_3 on exchangeable aluminum in red soils developed fromparent material of granite and Quaternary red clay.
对发育于花岗岩和第四纪红色粘土母质上的红壤的交换性铝的影响。
3)  exchangeable calcium
交换性钙
1.
Profile distribution of exchangeable calcium and magnesium in an aquic brown soil as affected by land use type.;
不同利用方式下潮棕壤交换性钙镁的剖面分布
2.
The contents of exchangeable calcium and magnesium in Hunan tobacco-growing soils and their effects on tobacco quality;
湖南烟区土壤交换性钙、镁含量及对烤烟品质的影响
3.
Discussions on the determination methods of exchangeable calcium,magnesium and potassium in south acid soil;
南方酸性土壤交换性钙、镁和钾测定方法的探讨
4)  exchangeable magnesium
交换性镁
1.
The spatial variability of exchangeable magnesium content in0-20cm horizon in cultivated soils of Shenyang suburbs,Liaonˉing,China,was investigated,and its distribution map was drawn by the methods of geostatistics combined with geographic information system.
利用地统计学和地理信息系统相结合的方法研究了沈阳市郊耕地土壤(0~20cm)交换性镁含量的空间变异性特征 ,绘制了交换性镁含量的空间分布图。
2.
Investigation of 1105 soil samples in plough horizon in Shandong Province showed that the exchangeable magnesium content is 0.
通过对全省不同土壤类型1105个耕层土壤样本的调查分析,明确了全省土壤交换性镁含量平均为0。
5)  exchange capability
交换性能
1.
The ion-exchange capability of polypropylene anion exchange fiber for Cr(Ⅵ) was studied.
 研究了苯乙烯系聚丙烯基阴离子交换纤维对Cr(Ⅵ)的交换性能,考察了酸度、温度和流速等因素对交换性能的影响。
6)  commutativity [kə,mju:tə'tiviti]
可交换性
1.
In this paper,we mainly discuss on the commutativity of orthogonal projections on a complex separable Hilbert space.
文章讨论了复可分Hilbert空间上的正交投影的可交换性,利用分块算子矩阵的技巧,分别从值域和谱的特征两个角度给出了正交投影可交换的等价刻画。
补充资料:交换性


交换性
commutativity

  交换性[~mu咐访ty;劝朋打aT“.的er‘- 代数运算(al罗braie operation)的性质之一对于加法和乘法,交换性由下列公式来表示: a十b二b+a和ab=ba.二元运算*是交换的(或者,换句话说,满足交换律(lawof commutativity)),如果在给定的代数系中,恒等式a*b=b*a成立.
  
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