exis

While in the actual power distribution system , multi-harmonic sources exis at the same time , which is necessary for the superposition problem to be studied .

然而在实际的配电系统中，往往存在多个谐波源，当它们同时作用于电网时，必须考虑它们的叠加问题。

Measurement results of water content of SF6 gas in GIS show that exis - tence of water content in SF6 gas will do harm to apparatuses .

通过对GIS中SF6气体水分含量测试结果分析，说明SF6气体中水分含量的存在对设备的危害情况。

This paper presents an expert identification system ( EXIS ) having been developed , and discusses especially about the estimation and searching method of the orders of models based on the correlative analysis of the determinant ratio test .

本文在对己开发的专家辨识系统EXIS（Expert，IdentificationSystem）进行介绍的基础上，着重讨论一种基于相关分析的行列式比值测试模型阶的估计和搜索方法。

After the existence of a limit cycle , which is symmetric with respect to one exis of coordinates on the phase plane , has been proved , the algebraic equation of the limit cycle may be immediately established .

对称于相平面一坐标轴的极限环的存在已被证实后，此极限环的代数方程便可立即建立。

The relational expression of water flux established may simplify the exis - ting models , and provide a new theoretic proposition for analyzing the trans - port processes of water in wood particles under non-isothermal condition The facilitating theoretic model would be convenient in application .

本文建立的水迁移通量关系式简化了现有的理论模型，为分析非等温条件下木片碎料中的水分迁移提供了新的理论思路，简化的理论模型可为实际应用带来方便。

This paper analyzes the competitive situation libraries confront with in a new technology environ - ment , and suggests the attitude libraries should adopt in response to the competition : to envisage the exis - tence of competition , to build core competitiveness , and to conduct collaborative competition .

文章从五个方面分析了新技术环境下图书馆所面临的竞争态势，提出了图书馆应对竞争的态度：正视竞争的存在、构建核心竞争力、开展合作竞争。