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2009中国控制与决策会议

作者： Dongdong Wei,Yuhong Zhao Department of Control Science and Engineering,Zhejiang University,Hangzhou 310027,China

Crystal size distribution is important for the production of pharmaceuticals and many other products in a number of industries.A new method to estimate the crystal size distribution is developed based on crystal photomicrographs acquired from an optical microscope imaging *** calibration of the imaging system is implemented by using a micrometer as a *** particle size information is extracted from each of a set of crystal images through image processing ***,according to the least square principle,different distribution functions are adopted to fit the particle size distribution respectively and the result with the minimum square error sum is chosen as the true size *** industrial application shows that the proposed method can provide a satisfactory estimation for the particle size distribution.

关键词： Crystal size distribution photomicrograph Calibration Image processing Curve fitting

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Determination of the Structure of Polyacrylamide/Aluminum Citrate Colloidal Dispersion Gel System

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Chinese Journal of Chemical Engineering 1998年第2期6卷 81-83页

作者：彭勃李明远纪淑玲吴肇亮 School of Petrochemical Engineering University of Petroleum

1 INTRODUCTIONIn recent years,colloidal dispersion gel(CDG)have been attracting more and more in thefield of enhanced oil recovery on account of the cost-effectiveness and high efficiency ofblocking *** with bulk gel(BG),CDG exhibits lower polymer concentra-tion,undefined shape and selective blocking formation *** characteris-tics of CDG and BG are related to *** the bulk gel a continuous network of polymermolecules is formed predominant through intermolecular ***

关键词： polyacrylamide colloidal dispersion gel crosslinking system photomicrograph

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The Geochemistry of Carbonate Rocks in Igwe Igarra, Southwestern Nigeria

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International Journal of Geosciences 2023年第6期14卷 505-514页

作者： Jumoke Mujidat Omodeni Department of SLT (Geology/Mining) Ekiti State University Ado Ekiti Nigeria

Nigeria has an abundance of valuable solid minerals and rocks which can generate revenue for the government if they are fully exploited. Carbonate rock is one of such rocks that occur prominently in Igwe Igarra area of Edo State. Five (5) carbonate rock samples (Four marble and One Calcsilicate) were subjected to geochemical analyses. A petrographic study reveals that marble and calcsilicate contain calcite, quartz, microcline, plagioclase, biotite and opaque minerals. Geochemical data shows that carbonate rocks have variable geochemical characteristics: Igwe marble is highly Calcitic (96% - 98%) and very low in dolomite Mg(CO3). Calcsilicate rock is low in CaO (27.5%) and higher in marble. The Igwe marble is pure and contains fewer impurities compared to calcsilicate rock which makes it unideal for usage. Based on these characteristics the marble from Igwe is suitable as raw materials for the productions of glass, papers, beet sugar, aggregates, lubricants and fillers.

关键词： Carbonate Rocks Geochemistry Igwe Area photomicrograph Southwestern Nigeria

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