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1)  attainable domain
能达域
1.
In this paper we discuss the attainable domain of a class of semilinear systemsby using the theory for generalized inverses of the linear operators and Sadovskii fixedpoint theorem,Some attainability practical criterions and analytic expressions of the at-tainable domain are derived.
本文研究一类半线性系统的能达域,应用Hilbert空间线性算子广义逆的理论和Sadovskii不动点定理,导出了系统能达域的若干解析式。
2)  Daqu watershed
达曲流域
1.
This paper detected existing distributing of debris flows in Daqu watershed based on the spot investigation.
通过野外考察和调查,查明了达曲流域的泥石流分布情况,得出达曲流域泥石流具有规模中等,危害严重;以冲为主,冲淤强烈;泥石流固体物质粒径粗;泥石流活动频率较低等特点。
3)  re-gion accessiblity
区域可达
4)  reachable region
可达区域
1.
At first, the extremal control of the system was got, then the reachable region of the time reversed system and the controllable region of the system were given.
首先求取系统极端控制,进而给出时间反转系统的可达区域和系统的可控区域。
5)  reachable neighbor
可达邻域
1.
In order to solve the two problems,this paper introduces a new notion of outlier based on reachable neighbor,which is called RN-Outlier,and proposes novel and fast algorithms for outlier detection.
提出了可达邻域的概念,定义了基于可达邻域的异常RN-Outlier。
6)  accessible domain
可达域
1.
The concepts of accessible domain, optimum accessible domain and optimum accessible value for goal programming were investigated, and their properties were studied as well.
给出了目标规划模型的可达域、最优可达域以及最优可达值等概念 ,同时研究了它们的性质 ,并介绍了最优可达值的求解方法 ,为决策者合理的决策提供了科学依据 ,从而获得更大的收
补充资料:离域能
分子式:
分子量:
CAS号:

性质:生成离域π键的体系,能量都比对应的经典结构式所表达的普通单双键体系应有的能量低,这个低的数值称为离域能。它可根据离域π键分子轨道的能级和π电子的排布情况计算。离域能产生的原因可归于两方面。一是由于电子的活动范围扩大,相应的平均动能变小。二是和小π键相比,生成离域π键时,π电子在原子两侧同时受两个核吸引,平均势能下降。因此总能量降低。

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