"The River-Merchant's Wife:A Letter",written by the great poet Li Bai,is the most prestigious version among the translations of Chinese ancient poetry by Ezra Pound and has been accepted as one of the cl..."The River-Merchant's Wife:A Letter",written by the great poet Li Bai,is the most prestigious version among the translations of Chinese ancient poetry by Ezra Pound and has been accepted as one of the classics of American literature.The poem exquisitely expresses the changes of the wife's mind at different phases.Martin and Rose's Appraisal Theory provides us with a theoretical framework for the analysis of the different realizations of the sentimental resources of the poem in the original and its English version.展开更多
In this paper, a multiple parameters weighted fractional Fourier transform(MPWFRFT) and constellation scrambling(CS) method based physical layer(PHY) security system is proposed. The proposed scheme is executed by two...In this paper, a multiple parameters weighted fractional Fourier transform(MPWFRFT) and constellation scrambling(CS) method based physical layer(PHY) security system is proposed. The proposed scheme is executed by two steps. In the first step, MPWFRFT, implemented as the constellation beguiling(CB) method, is applied to change the signal's identity. In the second step the additional pseudo random phase information, regarded as the encryption key, is attached to the original signal to enhance the security. Typically, the pseudo random phase information can be removed effectively by the legitimate receiver. In contrast to the cryptography based encryption algorithms and the conventional PHY secrecy techniques, the main contribution of the proposed scheme is concentrated on the variation in signal's characteristics. Simulation results show that the proposed scheme can prevent the exchanging signal from eavesdroppers' classifi cation or inception. Moreover, the proposed scheme can guarantee the BER performance at a tolerate increasing in computational complexity for the legitimate receivers.展开更多
文摘"The River-Merchant's Wife:A Letter",written by the great poet Li Bai,is the most prestigious version among the translations of Chinese ancient poetry by Ezra Pound and has been accepted as one of the classics of American literature.The poem exquisitely expresses the changes of the wife's mind at different phases.Martin and Rose's Appraisal Theory provides us with a theoretical framework for the analysis of the different realizations of the sentimental resources of the poem in the original and its English version.
基金supported by the National Basic Research Program of China under Grant 2013CB329003in part by the National Natural Science Foundation General Program of China under Grant 61171110
文摘In this paper, a multiple parameters weighted fractional Fourier transform(MPWFRFT) and constellation scrambling(CS) method based physical layer(PHY) security system is proposed. The proposed scheme is executed by two steps. In the first step, MPWFRFT, implemented as the constellation beguiling(CB) method, is applied to change the signal's identity. In the second step the additional pseudo random phase information, regarded as the encryption key, is attached to the original signal to enhance the security. Typically, the pseudo random phase information can be removed effectively by the legitimate receiver. In contrast to the cryptography based encryption algorithms and the conventional PHY secrecy techniques, the main contribution of the proposed scheme is concentrated on the variation in signal's characteristics. Simulation results show that the proposed scheme can prevent the exchanging signal from eavesdroppers' classifi cation or inception. Moreover, the proposed scheme can guarantee the BER performance at a tolerate increasing in computational complexity for the legitimate receivers.
