“Social contract”model has been one of the deep symbol of western ethics discourse,now many Christian ethical scholars suggest,Christian model of covenant can offer a special horizon for Christianity to take part in public life.

An adaptive fusion algorithm based on time window is proposed for distributed detection of underwater acoustic signal under communication constraints,such as large propagation delay and low reliability in underwater acoustic sensor networks.

The modeling and control problems for a class of multiple input and multiple output(MIMO) networked control systems with communication constraints and network-induced delays are presented in this paper.