http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Peiming Zhang,Yahui Su,Yiqiang Zhang,Leihong Zhang,Runchu Xu,Kaimin Wang,Dawei Zhang 한국광학회 2023 Current Optics and Photonics Vol.7 No.4
Optical information processing technology is characterized by high speed and parallelism, and the light features short wavelength and large information capacity; At the same time, it has various attributes including amplitude, phase, wavelength and polarization, and is a carrier of multi-dimensional information. Therefore, optical encryption is of great significance in the field of information security transmission, and is widely used in the field of image encryption. For multi-image encryption, this paper proposes a multi-image encryption algorithm based on a modified Gerchberg–Saxton algorithm (MGSA) in the Fresnel-transform domain and computational ghost imaging. First, MGSA is used to realize “one code, one key”; Second, phase function superposition and normalization are used to reduce the amount of ciphertext transmission; Finally, computational ghost imaging is used to improve the security of the whole encryption system. This method can encrypt multiple images simultaneously with high efficiency, simple calculation, safety and reliability, and less data transmission. The encryption effect of the method is evaluated by using correlation coefficient and structural similarity, and the effectiveness and security of the method are verified by simulation experiments.
( Joseph D. Alba ),( Peiming Wang ),( Woon Yee Ho ) 세종대학교 경제통합연구소 2007 Journal of Economic Integration Vol.22 No.2
We use data on 317 Japanese firms to examine the effect of relative access to credit and relative wealth on the Japanese firm`s rate of foreign direct investment (FDI) in the United States. Using the zero-inflated negative binomial model, we find that multiple rating downgrades of a firm`s main bank significantly affected the Japanese firm`s rate of FDI in the United States. This result holds for firms with the highest 20% of bonds-to-liabilities ratio indicating that banking problems in Japan affected even firms who could have financed their FDI with bonds. We also find that the firm`s rate of FDI is affected by the firm`s relative wealth.