漂移率測量法 的英文怎麼說
中文拼音 [biāoyílǜcèliángfǎ]
漂移率測量法
英文
rate of drift method- 漂 : 漂動詞[方言] (事情、帳目等落空) fail; end in failure
- 移 : Ⅰ動詞1. (移動) move; remove; shift 2. (改變; 變動) change; alter Ⅱ名詞(姓氏) a surname
- 率 : 率名詞(比值) rate; ratio; proportion
- 測 : 動詞1. (測量) survey; fathom; measure 2. (測度; 推測) conjecture; infer
- 量 : 量動1. (度量) measure 2. (估量) estimate; size up
- 法 : Ⅰ名詞1 (由國家制定或認可的行為規則的總稱) law 2 (方法; 方式) way; method; mode; means 3 (標...
- 漂移 : 1 (漂流移動) be driven by the current; drift about2 [電子學] drift; shift; shifting; shunt runn...
- 測量 : measure; survey; gauge; meter; measurement; measuring; surveying; mensuration; metering; gauging;...
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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
在此基礎上,針對穩態密度波理論提出了基於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,通過上下游傳感器信號相關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系結合漂移模型來求解總流量和含相率,實現油水兩相流的測量,在理論分析的基礎上,在實驗資料有限的條件下,對基於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用在測量均勻油水兩相流中的實用線性模型。Following, making development study from the three directions : the first one is how to reduce calculation when to use markowitz model. this text has improved the efficient frontier of markowitz model utilizing free risk assets, and reduced calculation about revenue rates " co - variance matrix utilizing single or multiple factors, and so on. the second one is to add thinking factors about, such as transaction fee, fund limitation, lowest transaction unit ' s limitation, risk measures and exchange rate risk of international portfolio securities, so as to make markowitz model closer to our country ' s practice
接著,分三今方向對markowitz模型進行了拓展研究:第一個方向是運用markowitz模型時如何減少計算量,本文利用無風險資產來改進markowitz模型的有效邊界,利用單因子或多因子模型來減少收益率協方差的計算量等等;第二個方向是增加考慮因素,諸如交易費用、資金限制、最小交易單位限制,風險測度和國際組合證券的匯率風險,使markowitz模型更貼近我國的實際;第三個方向是對markowitz模型進行動態拓展研究,提出了將證券收益率看成是隨機序列時的投資決策模型,深入研究了m ? v有效邊界隨資產品種數增加而發生的漂移,並用解析方法和幾何圖形描述了漂移的軌跡和方向。Tn order to eliminatc the error caused hylight power drift of incident light, we adopt the method of the ration of scattering light to measure the concentration of protein in milk. that is to measure 90 " scattering light intensity and 0 " transmitting light intensity in the light incident plane. the ratio of them is to be used to express measured optical parameter
由於牛乳蛋白質的測量精度要求很高,為了消除因入射光的光功率漂移而引起的誤差,我們採用散透比法來測量牛乳蛋白質的含量,即在光的入射平面內同時90處的散射光光強is和測量0處的透射光光強it ,用它們的比值來表徵測試牛乳蛋白質含量的光學參量。The phase detecting error caused by local oscillator frequency drift and non - synchronization of measurement signal and gate signal is eliminated and the measurement speed is improved at the same time
該方法可以有效的消除因本振信號頻率漂移及閘門信號與被測信號的非同步引起的測相誤差,同時提高了測量速度。分享友人