choice shift
1.This article puts forward the synthesis dynamical concept of social development?It reveals the cultural and spiritual factor is a dynamical resource to the sustainable development of economy and society,and the factor can be called"another invisible hand",It analyzes the sustainable development and the theory of modernization sublates the theory and brings up new ideas,The article criticizes the malpractice of industry civilization and its bad effects. reexamine human common choice--value criteria and ultimate goal of modern civilization shift.
2.The system of DES issued by ISO is a data encryption standard . After analyzing the DES arithmetic, this article brings forward practising DES by C language . By alternated circulation,the simple arithmetics(such as shift left, shift right ,addition of mode 2,etc) and commutation (choice function , replace function)was constructed into the nonlinear transform of data stream (encipher commutation or decrypt commutation) to realize cryptogrammic protect for computer data.
