over-dispersion 中文意思是什麼

over-dispersion 解釋
超擴散
  • over : adv 1 在上，在高處；從上向下；突出，倚靠；越過。 jump over 跳過。 climb over 爬過。2 在那邊，向那...
  • dispersion : n 1 分散，散開；散布，傳播；離散。2 【物理學】彌散，色散；【化學】分散作用；被分散物；分散相，分...
  1. There was an increase in the fadeproof time of 25 percent over the common coatings. both the nano - tio2 - modified coatings prepared by the way of in - situ sythesising method and the nano - sio2 - modified coatings prepared by the way of in - situ dispersion were strong weatherability coatings, which could resist 18 years " weathering if we calculated the result with the standard which argued that 100h of the artificial aging process was equal

    通過原位生成法制備的納米tio :改性塗料和在位分散法制備的納米510 :改性塗料具有超強的耐候性能，以人工老化100h大約相當于室外曝曬一年計算，納米改性的塗料在室外的使用壽命可超過18年。
  2. In this paper, river water quality prediction is integrated with water pollution control measures. two parameters, water environmental capacity and pollution index are selected for pollution control measures. the objective is achieved after the development of simulation model using one - dimensional advection dispersion equation. the model algorithm and computer program is an improvement over the existing water quality models, since the model solution involves four point implicit upwind schemes for water quality prediction and pollution control measures at each grid point. model simulation results the assessment of water environmental capacity that yield the acceptable and realistic pollutants concentration in order to maintain water quality objectives. the pollution and overall pollution index of the river is suggested for integrating number of contaminants variables into one index. study provides the mathematical and scientific procedure for water quality management. the new approach is helpful for the water pollution control and to study the impacts of waste effluents on the river system for strategic planning purposes

    本文將水質預測及水污染控制措施有機地結合，選取水環境容量和污染指數作為水污染控制的參數.這樣，一維對流-擴散水質方程的求解除就是實現本研究目的的關鍵.本研究採用的模型在現有的水質模型基礎上有所改進，因為其採用四點隱格式對水質進行預測，推求可接納污染物的環境容量值及為保證水質而限定的污染物濃度值，從而制定相應的水污染控制措施.為整體考慮各種污染物的情況，建議採用河流的污染指數進而推求綜合污染指數.總之，本研究為水質保護提供了科學的計算方法，該法對水污染控制及污水對河道水質的影響是實用有效的
  3. Abstract : in this paper, river water quality prediction is integrated with water pollution control measures. two parameters, water environmental capacity and pollution index are selected for pollution control measures. the objective is achieved after the development of simulation model using one - dimensional advection dispersion equation. the model algorithm and computer program is an improvement over the existing water quality models, since the model solution involves four point implicit upwind schemes for water quality prediction and pollution control measures at each grid point. model simulation results the assessment of water environmental capacity that yield the acceptable and realistic pollutants concentration in order to maintain water quality objectives. the pollution and overall pollution index of the river is suggested for integrating number of contaminants variables into one index. study provides the mathematical and scientific procedure for water quality management. the new approach is helpful for the water pollution control and to study the impacts of waste effluents on the river system for strategic planning purposes

    文摘:本文將水質預測及水污染控制措施有機地結合，選取水環境容量和污染指數作為水污染控制的參數.這樣，一維對流-擴散水質方程的求解除就是實現本研究目的的關鍵.本研究採用的模型在現有的水質模型基礎上有所改進，因為其採用四點隱格式對水質進行預測，推求可接納污染物的環境容量值及為保證水質而限定的污染物濃度值，從而制定相應的水污染控制措施.為整體考慮各種污染物的情況，建議採用河流的污染指數進而推求綜合污染指數.總之，本研究為水質保護提供了科學的計算方法，該法對水污染控制及污水對河道水質的影響是實用有效的
  4. ( 3 ) the most principal factors that influence the supersonic atomization process include the flow ratio of the gas - liquid metal ( gmr ) value, the flow of atomizing of gas and the range of the inverse vortex taper. the more of the value of three factors, the more advantage they are for the atomization and the more fine the powders are. ( 4 ) the produced powders are the best in efficient atomization efficiency, particle diameter, particle shape and dispersion when the solder alloy is zhl63a, atomizing medium is n2, the protrusion h = 6. 0mm, atomizing gas pressure p = 100mpa, over - heat temperature t = 167 ( t = 350 )

    研究結果表明： （ 1 ）超音速霧化器的氣體流場在導液管下端形成一個倒渦流錐，在二維空間上呈軸對稱的雙峰分佈，負壓形成於這個倒渦流錐內； （ 2 ）修正後的霧化氣體速度公式可以滿足超音速霧化的要求； （ 3 ）影響超音速霧化工藝最根本的因素有氣液質量流率比（ gmr ）的大小、霧化氣體流量和倒渦流錐范圍，三個因素的值越大，對形成細粉越有利； （ 4 ）在焊錫合金為zhl63a ，霧化介質微n _ 2 ，導液管突出高度取h = 6 . 0mm ，霧化氣體壓力取p = 1 . 0mpa ，合金過熱度取t = 167 （ t = 350 ）時，所制得的粉末在有效霧化率、顆粒球形度、粒度及其離散度三個方面綜合性能最好。
  5. A source routing framework is proposed to route traffic flows proactively over multiple paths, which tries to optimize routes for long - lived flows based on dispersity routing ; based on mathematical analysis, our approach disperses incoming traffic flows onto multiple paths according to path qualities. long - lived flows are detected and migrated to the shortest path if their qos could be guaranteed there. suggesting non - disjoint path set, four types of dispersion policies are analyzed, and flow classification policy which relates flow trigger with link state update period is investigated

    提出一種以業務量內在特性為基礎的前攝式多路路由演算法：以對業務量的內在特性分析為基礎，該方法在多路發送數據流的同時檢測非最短路徑上的長流，而後在保證服務質量的前提下將長流遷移到最短路徑上傳輸；前攝式多路路由使用以路徑質量評價為基礎的業務流分佈方法有效提高網路吞吐量，通過周期性的路徑質量評價適應時變網路狀況；模擬實驗表明，該方法可以有效提高「盡力而為」方式下的網路服務質量和資源利用率；浙江大學博士學位論文3
  6. Long - term studies have found that an achromatic retardation plate can be constructed by combining multiple wave - plate together. under certain combined condition, the spectral dispersion of birefringence in each plate cancels out over a defined spectral range

    在長期的實驗研究中發現，如果將多個延遲片進行復合，當滿足一定的復合條件時，復合波片也可以實現消色差的目的。
  7. Firstly, we estimate the variance and the mean of each cell with maximum likelihood ; secondly, we identify the important dispersion effects based on least squares analysis of the logarithm of within - replication variance ; last, we identify the important location effects based on weighted least squares analysis of the mean of each cell. a simulation study also demonstrates its superiority over some existing methods. an experiment for the robust design of thermostat is used to illustrate the method

    本文對帶有右截尾數據的有重復因子試驗，提出了另一種分析位置效應和散度效應的方法：首先，在每一個試驗點，對重復試驗觀察值用極大似然法估計出均值和方差；其次，用每個試驗點方差估計值的對數作為響應變量與各因子建立回歸模型，鑒別出顯著的散度效應；之後，採用加權最小二乘法鑒別出比較顯著的位置效應。
  8. The stock market can supply for capital with the remaining, make the dispersion ' s funds concentrate, accelerate the funds with the turn over of stock certificate, realizes the social resource install reasonable

    通過證券市場，可以調劑資本的供求和餘缺；使分散的資金集中化；加速資金和證券的周轉；實現社會資源的合理配置。
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