Based on a coupled nonlinear dynamic filter （NDF）, a novel chaotic stream cipher is presented in this paper and employed to protect palmprint templates. The chaotic pseudorandom bit generator （PRBG） based on a cou...Based on a coupled nonlinear dynamic filter （NDF）, a novel chaotic stream cipher is presented in this paper and employed to protect palmprint templates. The chaotic pseudorandom bit generator （PRBG） based on a coupled NDF, which is constructed in an inverse flow, can generate multiple bits at one iteration and satisfy the security requirement of cipher design. Then, the stream cipher is employed to generate cancelable competitive code palmprint biometrics for template protection. The proposed cancelable palmprint authentication system depends on two factors： the palmprint biometric and the password/token. Therefore, the system provides high-confidence and also protects the user＇s privacy. The experimental results of verification on the Hong Kong PolyU Palmprint Database show that the proposed approach has a large template re-issuance ability and the equal error rate can achieve 0.02%. The performance of the palmprint template protection scheme proves the good practicability and security of the proposed stream cipher.展开更多
Employing Grossman and Helpman＇s ＂protection for sale＂ model, this article uses data on anti-dumping actions from 1999 to 2009 to perform a quantitative analysis of factors influencing India＇s determinations of an...Employing Grossman and Helpman＇s ＂protection for sale＂ model, this article uses data on anti-dumping actions from 1999 to 2009 to perform a quantitative analysis of factors influencing India＇s determinations of anti-dumping duties against China, and reveals the micro-formation mechanism of economic conflicts between China and India. We find that the political power of India＇s anti-dumping plaintiffs markedly increases the tariff level of its final determinations and that the relationship between the import penetration ratio and duty rates depends upon whether the plaintiffs are politically organized. Further, there is a significant positive correlation between India＇s anti-dumping duty rates and its unfavorable trade balance with China. This indicates that in determining anti-dumping duties, Indian authorities are clearly influenced by the political clout of their domestic interest groups. They are also motivated by the desire to keep down China and gain the upper hand in the face-off between the ＂dragon and the elephant.＂展开更多
基金Project supported by the National Natural Science Foundation of China (Grant No. 60971104)the Basic Research Foundation of Sichuan Province,China (Grant No. 2006J013-011)+1 种基金the Outstanding Young Researchers Foundation of Sichuan Province,China (Grant No. 09ZQ026-091)the Research Fund for the Doctoral Program of Higher Education of China(Grant No. 20090184110008)
文摘Based on a coupled nonlinear dynamic filter （NDF）, a novel chaotic stream cipher is presented in this paper and employed to protect palmprint templates. The chaotic pseudorandom bit generator （PRBG） based on a coupled NDF, which is constructed in an inverse flow, can generate multiple bits at one iteration and satisfy the security requirement of cipher design. Then, the stream cipher is employed to generate cancelable competitive code palmprint biometrics for template protection. The proposed cancelable palmprint authentication system depends on two factors： the palmprint biometric and the password/token. Therefore, the system provides high-confidence and also protects the user＇s privacy. The experimental results of verification on the Hong Kong PolyU Palmprint Database show that the proposed approach has a large template re-issuance ability and the equal error rate can achieve 0.02%. The performance of the palmprint template protection scheme proves the good practicability and security of the proposed stream cipher.
基金an interim product of"Research into a Strategic System to Enable Chinese Enterprises to Cope with Trade Barriers against the Background of Prevailing International Trade Protectionism,"a project funded by the National Natural Science Foundation of China for Youth(71203228)
文摘Employing Grossman and Helpman＇s ＂protection for sale＂ model, this article uses data on anti-dumping actions from 1999 to 2009 to perform a quantitative analysis of factors influencing India＇s determinations of anti-dumping duties against China, and reveals the micro-formation mechanism of economic conflicts between China and India. We find that the political power of India＇s anti-dumping plaintiffs markedly increases the tariff level of its final determinations and that the relationship between the import penetration ratio and duty rates depends upon whether the plaintiffs are politically organized. Further, there is a significant positive correlation between India＇s anti-dumping duty rates and its unfavorable trade balance with China. This indicates that in determining anti-dumping duties, Indian authorities are clearly influenced by the political clout of their domestic interest groups. They are also motivated by the desire to keep down China and gain the upper hand in the face-off between the ＂dragon and the elephant.＂
