Quick surface metallization of titania powder was carried out by electrolesschemical deposition of nickel. The fabricated product was characterized by XRD, SEM, FTIR andcross-section metallography. The analysis result...Quick surface metallization of titania powder was carried out by electrolesschemical deposition of nickel. The fabricated product was characterized by XRD, SEM, FTIR andcross-section metallography. The analysis results show that titania particles are completely coatedby a thin nickel shell about 600 nm thick composed of nano-sized crystalline nickel particles.Mechanism of nickel chemical deposition on nano powder is proposed.展开更多
In near-infrared (NIR) analysis of plant extracts, excessive background often exists in near-infrared spectra. The detection of active constituents is difficult because of excessive background, and correction of this ...In near-infrared (NIR) analysis of plant extracts, excessive background often exists in near-infrared spectra. The detection of active constituents is difficult because of excessive background, and correction of this problem remains difficult. In this work, the orthogonal signal correction (OSC) method was used to correct excessive background. The method was also compared with several classical background correction methods, such as offset correction, multiplicative scatter correction (MSC), standard normal variate (SNV) transformation, de-trending (DT), first derivative, second derivative and wavelet methods. A simulated dataset and a real NIR spectral dataset were used to test the efficiency of different background correction methods. The results showed that OSC is the only effective method for correcting excessive background.展开更多
煤粉制备是我国绝大多数水泥企业必备的生产配套工艺。煤磨产出的煤粉质量对分解炉燃烧及回转窑正常运转都有着关键影响。以CAM(Cement's Automation and Management System,即水泥自动化与管理系统)智能控制系统为平台,创建神经网...煤粉制备是我国绝大多数水泥企业必备的生产配套工艺。煤磨产出的煤粉质量对分解炉燃烧及回转窑正常运转都有着关键影响。以CAM(Cement's Automation and Management System,即水泥自动化与管理系统)智能控制系统为平台,创建神经网络模型,开发出煤粉制备控制模块:通过稳定磨机出口压力来稳定磨机负荷,并保持磨机的出口风温、入口风温、电流、吐渣量等在合理的范围内,使磨机在稳定运行的同时产量最大化。实践表明,煤粉制备控制器控制效果良好,能够有效地控制煤磨出口温度,提高煤磨产量,节约热风,减少电耗。展开更多
悬浮预热器装置是水泥企业必备的生产配套装置。预热器可分为单系列和双系列,本文主要针对双系列预热器。预热器的预热作用对水泥熟料生产有着不可忽视的作用。本文以CAM(Cement's Automation and Management System,即水泥自动化...悬浮预热器装置是水泥企业必备的生产配套装置。预热器可分为单系列和双系列,本文主要针对双系列预热器。预热器的预热作用对水泥熟料生产有着不可忽视的作用。本文以CAM(Cement's Automation and Management System,即水泥自动化与管理系统)智能控制系统为平台,创建神经网络模型,开发出生料分料控制模块,并在水泥企业实际应用,实时控制分料阀,调整左右预热器的喂料量,保证物料与热风量相协调,稳定预热器左右两侧温度平衡,提高热效率。经现场长期使用表明,生料分料控制器控制效果良好,能够有效地减少左右预热器的温度差异,提高预热器热效率,提升预热器预热效果,在水泥企业生产中有重要的推广意义。展开更多
文摘Quick surface metallization of titania powder was carried out by electrolesschemical deposition of nickel. The fabricated product was characterized by XRD, SEM, FTIR andcross-section metallography. The analysis results show that titania particles are completely coatedby a thin nickel shell about 600 nm thick composed of nano-sized crystalline nickel particles.Mechanism of nickel chemical deposition on nano powder is proposed.
基金Project supported by the Zhejiang Province Key Technologies R & DProgram (No. 021103549)the National Key Technologies R & DProgram (No. 2001BA701A45), China
文摘In near-infrared (NIR) analysis of plant extracts, excessive background often exists in near-infrared spectra. The detection of active constituents is difficult because of excessive background, and correction of this problem remains difficult. In this work, the orthogonal signal correction (OSC) method was used to correct excessive background. The method was also compared with several classical background correction methods, such as offset correction, multiplicative scatter correction (MSC), standard normal variate (SNV) transformation, de-trending (DT), first derivative, second derivative and wavelet methods. A simulated dataset and a real NIR spectral dataset were used to test the efficiency of different background correction methods. The results showed that OSC is the only effective method for correcting excessive background.
文摘对于入窑生料的控制,“稳料仓+生料下料阀+冲板式流量计”相结合的方案是目前水泥厂的主流配置,稳料仓和喂料量都采用PID进行调节,但这种配置方案,入窑生料喂料量不稳定的情况比较突出。本文以神经网络模型为基础,通过CAM(Cement's Automation and Management System,即水泥自动化与管理)智能控制系统平台,开发出生料稳料控制模块,并实际应用在水泥企业中,实时控制生料喂料量。
文摘煤粉制备是我国绝大多数水泥企业必备的生产配套工艺。煤磨产出的煤粉质量对分解炉燃烧及回转窑正常运转都有着关键影响。以CAM(Cement's Automation and Management System,即水泥自动化与管理系统)智能控制系统为平台,创建神经网络模型,开发出煤粉制备控制模块:通过稳定磨机出口压力来稳定磨机负荷,并保持磨机的出口风温、入口风温、电流、吐渣量等在合理的范围内,使磨机在稳定运行的同时产量最大化。实践表明,煤粉制备控制器控制效果良好,能够有效地控制煤磨出口温度,提高煤磨产量,节约热风,减少电耗。
文摘悬浮预热器装置是水泥企业必备的生产配套装置。预热器可分为单系列和双系列,本文主要针对双系列预热器。预热器的预热作用对水泥熟料生产有着不可忽视的作用。本文以CAM(Cement's Automation and Management System,即水泥自动化与管理系统)智能控制系统为平台,创建神经网络模型,开发出生料分料控制模块,并在水泥企业实际应用,实时控制分料阀,调整左右预热器的喂料量,保证物料与热风量相协调,稳定预热器左右两侧温度平衡,提高热效率。经现场长期使用表明,生料分料控制器控制效果良好,能够有效地减少左右预热器的温度差异,提高预热器热效率,提升预热器预热效果,在水泥企业生产中有重要的推广意义。