This dissertation makes a breakthrough on the study method of economics, and analyses the local social security system differences in the view of jurisprudence.

本文突破以往学者经济学的研究方法，从法学的视角来分析我国社会保障制度的地区差异。

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In view of the importance of information and network security, a method of Chinese information encryption, BMP image and text hiding and the decryption is put forward.

针对信息与网络安全的重要性及严峻性，提出了一种汉字信息加密、在BMP图像文件中隐藏、恢复及解密的方法。

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Security hidden danger exists which in view of the hydraulic engineering construction in, to the safety control prevention, the scene control and the system method does by discusses.

针对水利工程施工中存在的安全隐患，对安全管理预防，现场控制及系统的方法作以探讨。

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