浅析算珠脑图象与数字符号脑图象

珠算式心算(简称珠心算),它是珠算技术的高级阶段,是通过知觉、形象、记忆等过程用脑图象来完成四则运算的。其图象有两种:一种是算珠脑图象。即计算时,用脑中的虚算盘,把手拨珠的运算改成用脑思维运算;另一种是数字符号脑图象高速反射进行运算的。在计算过程中无论任何拨珠过程,就可将正确的结果“叭”的一下印在脑子里。     

浅析算珠脑图象与数字符号脑图象

珠算式心算(简称珠心算)，它是珠算技术的高级阶段，是通过知觉、形象、记忆等过程用脑图象来完成四则运算的．其图象有两种，一种是算珠脑图象。即计算时，用脑中的虚算盘，把手拨珠的运算改成用脑思维运算；另一种是数字符号脑图象高速反射进行运算的，在计算过程中无论任何拨珠过程，就可将正确的结果“叭”的一下印在脑子里。     

Analyses of an air conditioning system with entropy generation minimization and entransy theory

In this paper,based on the generalized heat transfer law,an air conditioning system is analyzed with the entropy generation minimization and the entransy theory.Taking the coefficient of performance(denoted as COP) and heat flow rate Q~(out) which is released into the room as the optimization objectives,we discuss the applicabilities of the entropy generation minimization and entransy theory to the optimizations.Five numerical cases are presented.Combining the numerical results and theoretical analyses,we can conclude that the optimization applicabilities of the two theories are conditional.If Q~(out) is the optimization objective,larger entransy increase rate always leads to larger Q~(out),while smaller entropy generation rate does not.If we take COP as the optimization objective,neither the entropy generation minimization nor the concept of entransy increase is always applicable.Furthermore,we find that the concept of entransy dissipation is not applicable for the discussed cases.