1) distortionless enhancement by polarization transfer

近似对称性
1.
The structure of the title compound was identified by 1H , 13C, DEPT (distortionless enhancement by polarization transfer) and various two dimensional nuclear magnetic resonance spectroscopy, such as COSY (correlation spectroscopy), HSQC (heteronuclear correlation spectroscopy) and HMBC (heteronuclear multiple bond correlation spectroscopy).
94Hz的两个碳加以区分 ,解决了由于样品的近似对称性而导致几组谱峰难以归属的问
2) approximate symmetry

近似对称
1.
The problems of solving determining equations for approximate symmetry calculations are solved successfully by using differential form of Wu′s method.
给出三类扰动微分方程近似对称和近似势对称,并由此构造了对应的近似不变解。
3) Supersymmetry WKB approximation

超对称WKB近似
4) near symmetric in education

近似对称教育
6) similar symmetry

相似对称性
1.
This paper puts forward some concepts such as similar symmetry,similar symmetrical structure and so on.
提出了相似对称性和相似对称结构等概念,通过相似对称性在相似对称结构上的应用,揭示了相似对称结构的内力和变形的相似对称性规律,由相似对称性规律进一步发现相似对称结构和轴对称结构一样也可以取半边结构,使计算简化。
补充资料:近似连续性
近似连续性
approximate continuity
近似连续性【aPpro万mate continulty;..甲邢,砚ar~I.eupep‘.曰oc几] 连续性概念的一种推广,其中普通极限用近似极限(aPproximate limit)代替.函数f(x)称为在点x。是近似连续的(approximately continuous),是指 lim aPf(x)=f(x。)· X弓xo在最简单的情形,f(x)是n维Euclid空间上的实值函数(一般地,它是向量值函数).下面的定理成立.1)实值函数f(x)在集E上Lebesgue可测的充要条件是,f在E上几乎处处近似连续(见C代naHoB一Denjoy定理(Stepanov一Denjoy theorem)).2)对于任意的有界Lebesgue可测函数f(x),在它的每个近似连续点x。,下式成立: 。:去~lf(二)J;一f(二。), 两风R)穿‘”’一尸其中拜是n维Lebesgue测度,R是包含x。的非退化的n维线段,而p为它的直径.【补注】有关其他参考文献,见近似极限(approximatelimit).
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参考词条