entire variable 中文意思是什麼
entire variable
解釋
整體變量-
By means of building modelling with the target angular displacement and its sliding model variable structure controller of transmission ratio control electromotor, the parameters of entire controller are defined
通過對速比控制電機目標角位移、角位移滑模變結構控制器的建模，來確定整個控制器的設計參數。 -
At present, variable air volume ( vav ) air - conditioning system is the main steam of the whole air conditioning system in china and abroad because of its large energy conservatioa however, since vav system is multivariable, strongly coupled, nonlinear and time variant, its design, performance and management are more difficult than constant air volume ( cav ) system, and stable control of the entire vav system is focused in particular in china study on the stability, the key condition of the vav operation, the paper divide the vav system into ahu part and terminal part based on the coordination control strategy
目前，變風量（ variableairvolume ， vav ）空調系統以其巨大的節能潛力逐漸成為國內外空調系統的主流。但是，變風量（ vav ）空調系統具有多變量、強耦合、非線性、時變的特點，因此它的設計、運行和管理都比定風量（ constantairvolume ， cav ）系統難度大。這也是限制vav系統更廣泛應用的一個重要原因。 -
When user defined functions ( udfs ) are involved in the join predicate, the algorithms for the computation of relational joins can not be used directly. in the paper, the restricting transformation function r, is defined, which can restrict some variable ' s values. without scanning the entire relation, performance of join algorithm can be improved greatly
當連接條件中包含用戶自定義的復雜函數時，原有的連接演算法不能直接應用於該連接運算，為此，本文提出了限定變換函數t _ r概念，來限定連接謂詞中某些變元的取值范圍，從而避免對整個關系的掃描，達到提高連接演算法性能的目的。
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