Performance comparison between noise signal and chirp signal in correlation measurement 相關(guān)法測量中的噪聲信號源和掃頻信號源的性能比較
Study and application of speckle correlation measurement method for displacement fields of model 模型位移場的散斑互相關(guān)法測量技術(shù)研究及應(yīng)用
Interesting measurement problem often be considered in the process to mine association rules . the paper propose means to mine association rules which contain negative character item by correlation measurement 興趣度是關(guān)聯(lián)規(guī)則挖掘中經(jīng)常要考慮的一個問題。本文通過相關(guān)度的概念對含有負(fù)屬性項的關(guān)聯(lián)規(guī)則生成方法進行了探索,并給出了相應(yīng)算法。
This theoretic model employs the basic idea of correlation measurement , achieve the density wave speed by the correlation of the signals of upper and lower sensors , and get the total flow rate and water cut through the theoretic relationship of density wave speed and total flow rate as well as holdup with the help of drift flux model so as to accomplish the oil / water two - phase flow measurement at last , using the limited available experiment data , the theoretic model has been simplified into an applicable linear alternative which is suitable to homogeneous oil / water two - phase flow measurement to accomplish the oil / water two - phase flow measurement using the density wave phenomena is of highly theoretically valuable for density wave theory research as well as oilavater two - phase flow measurement research . to develop new type oil / water two - phase flow instrumentation based on this theoretic measurement method will be very applicable and promising 在此基礎(chǔ)上,針對穩(wěn)態(tài)密度波理論提出了基于密度波理論的油水兩相流測量理論模型,該模型以密度波傳播理論作為基礎(chǔ),通過上下游傳感器信號相關(guān)獲得密度波傳播速度,利用密度波傳播速度與總流量以及持相率的理論關(guān)系結(jié)合漂移模型來求解總流量和含相率,實現(xiàn)油水兩相流的測量,在理論分析的基礎(chǔ)上,在實驗資料有限的條件下,對基于密度波理論的油水兩相流測量理論模型作了極限的簡化,提出了本文油水兩相流測量理論方法應(yīng)用在測量均勻油水兩相流中的實用線性模型。
A study of on - line measurement of multiphase flow is shown in this paper . it presents a new measurement method based on the capacitance , conductance , rf ( radio freqency ) and cross - correlation measurement technique after investigating and analyzing the materials of many multiphase flowmeters home and abroad 本文以油、氣、水多相流的在線測量為研究內(nèi)容,通過比較分析國內(nèi)外幾種多相流量計的資料,提出了一種基于電容、電導(dǎo)、射頻以及相關(guān)檢測技術(shù)的新的測量方案。