The discrete element method(DEM) has been widely used to simulate microscopic interactions between particles.Screening is a deeply complicated process when considering the law of motion for the particles,themselves.In...The discrete element method(DEM) has been widely used to simulate microscopic interactions between particles.Screening is a deeply complicated process when considering the law of motion for the particles,themselves.In this paper,a numerical model for the study of a particle screening process using the DEM is presented.Special attention was paid to the modeling of a vibrating screen that allows particles to pass through,or to rebound,when approaching the screen surface.Inferences concerning screen length and vibrating frequency as they relate to screening efficiency were studied.The conclusions were:three-dimensional simulation of screening efficiency along the screen length follows an exponential distribution;when the sieve vibrates over a certain frequency range the screening efficiency is stable;and,higher vibration frequencies can improve the handling capacity of the screening machine.展开更多
To build the harmonious society needs the effect of morality.There are various kinds of moral values.Moral values can be divided into proper ones and improper ones according to whether the social benefit is bigger tha...To build the harmonious society needs the effect of morality.There are various kinds of moral values.Moral values can be divided into proper ones and improper ones according to whether the social benefit is bigger than the social cost of the moral behavior.The former is helpful to the optimal allocation of resources and improve the formation of the harmonious society; while the latter is harmful to the optimal allocation of resource and bad to the formation of the harmonious society.The proper and scientist moral values include： sustainable development view on ecology,fair,just and win win view on morality,credibility,right view on rich and poor,right view on consumption and so on.To build the proper and scientific moral value,the more important way is building proper moral property rights institution by recognizing properly and constructing moral property rights besides legislation,setting up moral surroundings,valuing moral penetration,strengthening moral education etc.Harmonious society;Moral property rights;Moral value展开更多
Chinese culture puts much emphasis upon ethics, by which people are bound to pay respect to their superiors, fathers or husbands, hence a realization of social harmony and the utmost of the moral unification of heaven...Chinese culture puts much emphasis upon ethics, by which people are bound to pay respect to their superiors, fathers or husbands, hence a realization of social harmony and the utmost of the moral unification of heavens and human beings. The story as a means of significance in transmission of traditional culture explains vividly the connotation of traditional morals and plays a role of importance in moral education of ancient times as well. This thesis shall analyze the essence of moral ideas in those stories, through which to be aware of and taste the ethical tenderness in traditional moralities, thus a perfection of the application of traditional stories to modern moral education.展开更多
基金Project 2006HZ0002-2 supported by the Special Topic Fund of Key Science and Technology of Fujian Province
文摘The discrete element method(DEM) has been widely used to simulate microscopic interactions between particles.Screening is a deeply complicated process when considering the law of motion for the particles,themselves.In this paper,a numerical model for the study of a particle screening process using the DEM is presented.Special attention was paid to the modeling of a vibrating screen that allows particles to pass through,or to rebound,when approaching the screen surface.Inferences concerning screen length and vibrating frequency as they relate to screening efficiency were studied.The conclusions were:three-dimensional simulation of screening efficiency along the screen length follows an exponential distribution;when the sieve vibrates over a certain frequency range the screening efficiency is stable;and,higher vibration frequencies can improve the handling capacity of the screening machine.
文摘To build the harmonious society needs the effect of morality.There are various kinds of moral values.Moral values can be divided into proper ones and improper ones according to whether the social benefit is bigger than the social cost of the moral behavior.The former is helpful to the optimal allocation of resources and improve the formation of the harmonious society; while the latter is harmful to the optimal allocation of resource and bad to the formation of the harmonious society.The proper and scientist moral values include： sustainable development view on ecology,fair,just and win win view on morality,credibility,right view on rich and poor,right view on consumption and so on.To build the proper and scientific moral value,the more important way is building proper moral property rights institution by recognizing properly and constructing moral property rights besides legislation,setting up moral surroundings,valuing moral penetration,strengthening moral education etc.Harmonious society;Moral property rights;Moral value
文摘Chinese culture puts much emphasis upon ethics, by which people are bound to pay respect to their superiors, fathers or husbands, hence a realization of social harmony and the utmost of the moral unification of heavens and human beings. The story as a means of significance in transmission of traditional culture explains vividly the connotation of traditional morals and plays a role of importance in moral education of ancient times as well. This thesis shall analyze the essence of moral ideas in those stories, through which to be aware of and taste the ethical tenderness in traditional moralities, thus a perfection of the application of traditional stories to modern moral education.
