essential variables 中文意思是什麼
essential variables
解釋
重要可變因素-
The limit theory of law of the iterated logarithm have received more and more attentions, especially about identical independent random variables. but up to now, the studies are only for partial sums and, have n ' t shown any concern on the special finite partial weight suras. however, the partial sums and partial weight sums not only have the osculating aspects, but also have essential difference between them. so the studies for these play an important role in theoretical and applied setups
因此對重對數律的研究引起了國內外學者的興趣，對獨立同分佈的隨機變量，許多學者做了大量的研究工作，但迄今為止這方面的研究仍限於部分和數列的重對數律，很少涉及到特殊加權和的領域，而部分和與加權和之間既有密切聯系，又有本質不同，因此，這一問題的研究具有一定理論意義和應用價值。 -
In these mathematic models, the essential vedables are propulsion motor ' s input voltage, input currefit and outpllt rotate rate and output torque. with these variables, the transient process of torpedo ' s electrical counterrotating propulsion system is studied both in quality and in quantity by computing its mathematic models
在這些數學模型中，以推進電機的輸入電壓、輸入電流、輸出轉矩和輸出轉速等為基本分析變量，對魚雷電動力推進系統的暫態過程進行定性定量的分析。 -
The cointegration analysis of the impacts of the import, export and per capita income on the industrial structure from 1978 to 2004 in yunnan province has reached the following results : there exists one cointegration relation between the four variables ; export has a positive impact on the upgrading of the industrial structure while import has a negative impact ; per capita income has little impact ; the " essential variable " of the development of industrial structure is on the increase
雲南省1978 ~ 2004年出口、進口及人均收入對產業結構的促進作用的協整分析表明：四個變量之間存在惟一的協整關系，出口對產業結構升級有正相關作用，進口則阻礙產業結構升級，而人均收入對產業結構的影響不明顯，產業結構成長的「本質變量」逐漸增大。 -
Both complicated and simple model of transient stability analysis are integrated in the software, applying the model of each component to different degree of precision respectively. joined with the power system diagram editor, the transient stability analysis can be carried out in a graphical way. some auxiliary models are introduced, such as the classes of fault information and swing curves, etc. these models turn out to be essential to make the procedure of transient stability simulation vivid and intuitionistic, with the swing curves of different variables during the transient period being showed and printed conveniently
針對電力系統各元件模型的不同精確程度，採用成熟的數值解法實現了復雜模型的暫態穩定計算和簡化模型的暫態穩定計算，並與已有的面向對象的電力系統圖編輯器進行了很好的連接，實現了暫態穩定分析的圖形化；實現了故障信息類、變化曲線類等輔助對象，使得整個暫態穩定模擬計算的過程形象直觀，且能對暫態過程中各量的變化曲線進行方便地顯示和列印輸出。 -
Tied variables are an essential tool for any perl programmer
綁定的變量對于所有perl程序員都是一個重要的工具。
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