协调控制系统(Coordinated Control System)简称CCS,是大型火电机组的一个重要的控制系统,是整个单元机组控制装置的中心管理部分。CCS以锅炉和汽轮机作为整体控制对象,使机组具有良好的负荷适应性,满足电网的能量需求,同时保持主汽压...协调控制系统(Coordinated Control System)简称CCS,是大型火电机组的一个重要的控制系统,是整个单元机组控制装置的中心管理部分。CCS以锅炉和汽轮机作为整体控制对象,使机组具有良好的负荷适应性,满足电网的能量需求,同时保持主汽压力足够稳定,维持锅炉与汽机之间的能量平衡。从80年代中期以来,许多国产的大型火电机组都采用了由SPEC200组装仪表构成的CCS系统。从CCS控制对象的特性可知,这是一个复杂的多变量控制系统,其主要特点是整个控制系统的模拟量控制和逻辑联锁控制之间的联系非常密切。展开更多
Synthetic dyes are very important for textile dyeing,paper printing,color photography and petroleum products.Traditional methods of dye removal include biodegradation,precipitation,adsorption,chemical degradation,phot...Synthetic dyes are very important for textile dyeing,paper printing,color photography and petroleum products.Traditional methods of dye removal include biodegradation,precipitation,adsorption,chemical degradation,photo degradation,and chemical coagulation.Dye decolorization with enzymatic reaction is an important issue for several research field(chemistry,environment)In this study,minimum decolorization time of Remazol Brilliant Blue R dye with Horseradish peroxidase enzyme was calculated using with mathematical equation depending on experimental data.Dye decolorization was determined by monitoring the absorbance decrease at the specific maximum wavelength for dye.All experiments were carried out with different initial dye concentrations of Remazol Brilliant Blue R at 25 ℃ constant temperature for 30 minutes.The development of the least squares estimators for a nonlinear model brings about complications not encountered in the case of the linear model.Decolorization times for completely removal of dye were calculated according to equation.It was shown that mathematical equation was conformed exponential curve for dye degradation.展开更多
In the present study,thermal behavior and crystal transition of pure poly(butylene adipate)(PBA)upon heating process were investigated by FTIR spectroscopy.To gain further insight into the thermal behavior alteration ...In the present study,thermal behavior and crystal transition of pure poly(butylene adipate)(PBA)upon heating process were investigated by FTIR spectroscopy.To gain further insight into the thermal behavior alteration and the phase transition of PBA,we performed two-dimensional(2D)correlation analysis.We found thatβ-form PBA crystal undergoes not only the melting process but also crystal transition upon the heating process.展开更多
在我国重要高坝工程抗震设计中,采用设定地震方法确定坝址场地相关设计反应谱时,同时依据地震安评和NGA反应谱衰减关系,但两者的震源和参数不匹配。本文在当前研究现状下提出确定场地相关设计反应谱的方法:基于全球范围的NGA WEST 2数据...在我国重要高坝工程抗震设计中,采用设定地震方法确定坝址场地相关设计反应谱时,同时依据地震安评和NGA反应谱衰减关系,但两者的震源和参数不匹配。本文在当前研究现状下提出确定场地相关设计反应谱的方法:基于全球范围的NGA WEST 2数据库,构建以震级和震中距分档的反应谱数据库。针对混凝土坝和坐落在深厚覆盖层的土石坝,分别建立来自基岩近场和远场大震强震动记录的反应谱数据库。根据设定地震的震级和距离,从反应谱数据库分步插值,直接给出与设计峰值加速度相应的场地相关设计反应谱。采用上述思路确定场地相关设计反应谱,避开了具有诸多不确定性且与地震安评不匹配的反应谱衰减关系,其结果更为合理。展开更多
文摘协调控制系统(Coordinated Control System)简称CCS,是大型火电机组的一个重要的控制系统,是整个单元机组控制装置的中心管理部分。CCS以锅炉和汽轮机作为整体控制对象,使机组具有良好的负荷适应性,满足电网的能量需求,同时保持主汽压力足够稳定,维持锅炉与汽机之间的能量平衡。从80年代中期以来,许多国产的大型火电机组都采用了由SPEC200组装仪表构成的CCS系统。从CCS控制对象的特性可知,这是一个复杂的多变量控制系统,其主要特点是整个控制系统的模拟量控制和逻辑联锁控制之间的联系非常密切。
文摘Synthetic dyes are very important for textile dyeing,paper printing,color photography and petroleum products.Traditional methods of dye removal include biodegradation,precipitation,adsorption,chemical degradation,photo degradation,and chemical coagulation.Dye decolorization with enzymatic reaction is an important issue for several research field(chemistry,environment)In this study,minimum decolorization time of Remazol Brilliant Blue R dye with Horseradish peroxidase enzyme was calculated using with mathematical equation depending on experimental data.Dye decolorization was determined by monitoring the absorbance decrease at the specific maximum wavelength for dye.All experiments were carried out with different initial dye concentrations of Remazol Brilliant Blue R at 25 ℃ constant temperature for 30 minutes.The development of the least squares estimators for a nonlinear model brings about complications not encountered in the case of the linear model.Decolorization times for completely removal of dye were calculated according to equation.It was shown that mathematical equation was conformed exponential curve for dye degradation.
文摘In the present study,thermal behavior and crystal transition of pure poly(butylene adipate)(PBA)upon heating process were investigated by FTIR spectroscopy.To gain further insight into the thermal behavior alteration and the phase transition of PBA,we performed two-dimensional(2D)correlation analysis.We found thatβ-form PBA crystal undergoes not only the melting process but also crystal transition upon the heating process.
文摘在我国重要高坝工程抗震设计中,采用设定地震方法确定坝址场地相关设计反应谱时,同时依据地震安评和NGA反应谱衰减关系,但两者的震源和参数不匹配。本文在当前研究现状下提出确定场地相关设计反应谱的方法:基于全球范围的NGA WEST 2数据库,构建以震级和震中距分档的反应谱数据库。针对混凝土坝和坐落在深厚覆盖层的土石坝,分别建立来自基岩近场和远场大震强震动记录的反应谱数据库。根据设定地震的震级和距离,从反应谱数据库分步插值,直接给出与设计峰值加速度相应的场地相关设计反应谱。采用上述思路确定场地相关设计反应谱,避开了具有诸多不确定性且与地震安评不匹配的反应谱衰减关系,其结果更为合理。
