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In order to solve pre-existing audio voice signal edge extraction is not accurate, easily lead to useful signal missing and the extraction of speech signals pitch detection easily misjudge the problems, proposed a threshold preprocessing voice method and an improved method of extracting the pitch period, we used moving window and polynomial smoothing method (Savitzky-Golay) smoothing the original...
Comprehensive analysis on the security mechanism of EMV2000 payment protocol indicates that there is still some frangibility in EMV2000 payment systems. Based on EMV2000 transaction flow, improvement advice to enhance the security of EMV transaction protocol is put forward. The authentication information that the terminal sends to the card, the issuer sends to the terminal and the issuer sends to...
The paper, starting from the history of government trust in China, studies how government trust has been transferred into government credit by the help of the state assets as a hidden guarantor under the present state property rights mechanism. As a symbol of the government trust, the state-owned share proportion is employed to study its impact upon commercial credit, bank credit and security credit...
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