真理的“权威依赖”——“人的依赖”社会的真理存在

“没有历史”的真理,以社会历史为自己存在的历史。规定于社会的真理,在不同的历史阶段或社会形态,表达为不同的存在方式。“人的依赖”社会的质是“权威依赖”。在“人的依赖”社会,真理是“权威”的真理形式,“权威依赖”是真理“自已构成自己的运动”的现实性空间,“内在依赖”与“外在依赖”是真理依赖“权威”的基本形式,真理的“更替”依赖于“权威”的“更替”。真理的存在依赖于“权威”,“权威”是真理存在的总体性尺度。

马克思人的发展三形态论析

近年来 ,人们对人的发展问题的研究多是同时态的分析 ,而缺乏对人的发展作历时态的考察。马克思在将人类社会发展的历史理解为人自身发展的历史的基础上 ,提出人的发展的三形态理论。即人的发展将经历以下三个历史形态 :“人的依赖关系”、“以物为基础的独立性”和“自由个性”

On Local Nonreflecting Boundary Conditions for Time Dependent Wave Propagation

The simulation of wave phenomena in unbounded domains generally requires an artificial boundary to truncate the unbounded exterior and limit the computation to a finite region.At the artificial boundary a boundary condition is then needed,which allows the propagating waves to exit the computational domain without spurious reflection.In 1977,Engquist and Majda proposed the first hierarchy of absorbing boundary conditions,which allows a systematic reduction of spurious reflection without moving the artificial boundary farther away from the scatterer.Their pioneering work,which initiated an entire research area,is reviewed here from a modern perspective.Recent developments such as high-order local conditions and their extension to multiple scattering are also presented.Finally,the accuracy of high-order local conditions is demonstrated through numerical experiments.