Rotary kiln process for iron ore oxide pellet production is hard to detect and control.Construction of one-dimensional model of temperature field in rotary kiln was described.And the results lay a solid foundation for...Rotary kiln process for iron ore oxide pellet production is hard to detect and control.Construction of one-dimensional model of temperature field in rotary kiln was described.And the results lay a solid foundation for online control.Establishment of kiln process control expert system was presented,with maximum temperature of pellet and gas temperature at the feed end as control cores,and interval estimate as control strategy.Software was developed and put into application in a pellet plant.The results show that control guidance of this system is accurate and effective.After production application for nearly one year,the compressive strength and first grade rate of pellet are increased by 86 N and 2.54%,respectively,while FeO content is 0.05% lowered.This system can reveal detailed information of real time kiln process,and provide a powerful tool for online control of pellet production.展开更多
Objective：To investigate the relationship between renal blood distribution and the physiological activities of the kidney. Methods：A mathematical model is developed based on response （MR） Hagan-Poiseuille law and ...Objective：To investigate the relationship between renal blood distribution and the physiological activities of the kidney. Methods：A mathematical model is developed based on response （MR） Hagan-Poiseuille law and mass transport, coupling mechanics of myogenic tubuloglomerular feedback （TGF） and the tubular system in the renal medulla. The model parameters, including the permeability coefficients, the vascular lumen radius and the solute concentration at the inlet of the tubes, are derived from the experimental results. Simulations of the blood and water flow in the loop of Henel, the collecting duct and vas rectum, are carried out by the model of the tubular system in the renal medulla, based on conservations of water and solutes for transmural transport. Then the tubular model is coupled with MR and TGF mechanics. Results：The results predict the dynamics of renal autoregulation on its blood pressure and flow, and the distributions are 88.5% in the cortex, 10.3% in the medulla, and 1.2% at papilla,respectively. The fluid flow and solute concentrations along the tubules and vasa recta are obtained. Conclusion ：The present model could assess renal functions qualitatively and quantitatively and provide a methodological approach for clinical research.展开更多
The reform ignited by digital media provided strong impetus to literary transformation at the turn of century in China. The market-led rise of online literature has destroyed the balance of traditional literature and ...The reform ignited by digital media provided strong impetus to literary transformation at the turn of century in China. The market-led rise of online literature has destroyed the balance of traditional literature and resulted in a fundamental digital readjustment of the overall literary structure. The fourth medium, with its irresistible technological force, has led to a large-scale literary shift towards ＂being digital,＂ thereby changing literary traditions of existence and expression. Such being the case, we need to clarify digital media＇s dual function of＂deconstruction＂ and ＂construction＂ in this literary shift so as to input new ideas from a different academic perspective into literary theory of the digital era, turn digital media＇s challenge to tradition into a chance for literary innovation and make the new media into a powerful driving force and effective resource for Chinese literature in the new century.展开更多
基金Project(NCET-05-0630) supported by Program for New Century Excellent Talents in University of China
文摘Rotary kiln process for iron ore oxide pellet production is hard to detect and control.Construction of one-dimensional model of temperature field in rotary kiln was described.And the results lay a solid foundation for online control.Establishment of kiln process control expert system was presented,with maximum temperature of pellet and gas temperature at the feed end as control cores,and interval estimate as control strategy.Software was developed and put into application in a pellet plant.The results show that control guidance of this system is accurate and effective.After production application for nearly one year,the compressive strength and first grade rate of pellet are increased by 86 N and 2.54%,respectively,while FeO content is 0.05% lowered.This system can reveal detailed information of real time kiln process,and provide a powerful tool for online control of pellet production.
文摘Objective：To investigate the relationship between renal blood distribution and the physiological activities of the kidney. Methods：A mathematical model is developed based on response （MR） Hagan-Poiseuille law and mass transport, coupling mechanics of myogenic tubuloglomerular feedback （TGF） and the tubular system in the renal medulla. The model parameters, including the permeability coefficients, the vascular lumen radius and the solute concentration at the inlet of the tubes, are derived from the experimental results. Simulations of the blood and water flow in the loop of Henel, the collecting duct and vas rectum, are carried out by the model of the tubular system in the renal medulla, based on conservations of water and solutes for transmural transport. Then the tubular model is coupled with MR and TGF mechanics. Results：The results predict the dynamics of renal autoregulation on its blood pressure and flow, and the distributions are 88.5% in the cortex, 10.3% in the medulla, and 1.2% at papilla,respectively. The fluid flow and solute concentrations along the tubules and vasa recta are obtained. Conclusion ：The present model could assess renal functions qualitatively and quantitatively and provide a methodological approach for clinical research.
文摘The reform ignited by digital media provided strong impetus to literary transformation at the turn of century in China. The market-led rise of online literature has destroyed the balance of traditional literature and resulted in a fundamental digital readjustment of the overall literary structure. The fourth medium, with its irresistible technological force, has led to a large-scale literary shift towards ＂being digital,＂ thereby changing literary traditions of existence and expression. Such being the case, we need to clarify digital media＇s dual function of＂deconstruction＂ and ＂construction＂ in this literary shift so as to input new ideas from a different academic perspective into literary theory of the digital era, turn digital media＇s challenge to tradition into a chance for literary innovation and make the new media into a powerful driving force and effective resource for Chinese literature in the new century.
