concentration fluctuations 中文意思是什麼

concentration fluctuations 解釋
濃度起伏
  • concentration : n. 1. 集中。2. 【化學】提濃，蒸濃，濃縮；濃度；稠密度；【礦物】汰選，選礦，富化。3. 集中注意，專心。
  • fluctuations : 波動
  1. The fundamental theory and equations for the pressure fluctuation are described and the wall pressure fluctuation is measured. based on the experiment data, the characteristics of pressure fluctuations are analyzed in the three - phase flow of water, air and sand. the effects of air concentration and sediment content on the amplitude and frequency of pressure fluctuations are discussed

    建立了多相流壓強脈動基本方程，闡述了水流脈動壓強基本理論，分析了壓強脈動機理；根據試驗數據，探討了水、氣、沙三相流體的壓強脈動特性，初步得到了高速含沙摻氣水流脈動壓強的幅值特性與頻域特性；提出了脈動壓強強度系數、脈動壓強極差系數與含沙量、摻氣濃度的關系。
  2. Additionally, more modest dopamine concentration fluctuations, related to punishment and movement, are seen at 200 - 18000 times longer time courses using voltammetry and microdialysis in vivo

    另外，更適度的多巴胺濃度漲落與處罰和運動有關系，活體內用伏安法和微量透析可把時程延長200 - 18000倍。
  3. The motion characteristics of the suspended particles were obtained by statistical analysis, including vertical concentration distribution, mean velocity profile, turbulent intensity, velocity correlation, and the probability density distribution of the velocity fluctuations. attempt has also been made to interpret the turbulent characteristics in terms of particle properties and turbulence structure

    對不同容重、不同粒徑的顆粒在不同水流條件下的垂線濃度分佈、平均速度和脈動強度分佈、相關函數及脈動速度的概率密度分佈等進行了全面系統的統計分析，得到的中文摘要主要成果如下：
  4. Also, the researchers were able to deploy the foxy sensor for long periods of time to collect data, and observed that oxygen concentration in the estuary declined by nearly 80 percent overnight - - a significant change that might indicate major tidal fluctuations

    研究人員也能夠使用foxy傳感器進行長期收集數據， 80 %整夜時間觀察河口氧濃度的衰減- -一個明顯的變化可能表面主要的潮汐波動。
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