There are changes in public sector management practice in Western countries since 1970s in the 20th century. Traditional public administration model gradually turned into new public management model.
20世纪70年代以来西方发达国家公共部门管理实践发生了变化，传统公共行政模式逐步向新公共管理模式转变。
The establishment of service administration thought provides a new model for China's public affair management.
服务行政思想的确立为我国公共事业管理提供了新的思维模式。
Through some improvement to the RSA public key system, a new method of multicast encryption is put forward and then corresponding key management model is given.
并通过对RSA公钥密码算法的改进，给出一种新的组播加密方法，进而给出相应的密钥管理方案。
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