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Efficient privacy-preserving classification construction model with differential privacy technology 被引量:2
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作者 Lin Zhang Yan Liu +2 位作者 Ruchuan Wang Xiong Fu Qiaomin Lin 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2017年第1期170-178,共9页
To address the problem of privacy disclosure during data mining, a new privacy-preserving decision tree classification construction model based on a differential privacy-protection mechanism is presented. An efficient... To address the problem of privacy disclosure during data mining, a new privacy-preserving decision tree classification construction model based on a differential privacy-protection mechanism is presented. An efficient classifier that uses feedback to add two types of noise via Laplace and exponential mechanisms to perturb the calculation results are introduced to the construction algorithm that provides a secure data access interface for users. Different split solutions for attributes of continuous and discrete values are provided and used to optimize the search scheme to reduce the error rate of the classifier. By choosing an available quality function with lower sensitivity for making decisions and improving the privacy budget allocation methods, the algorithm effectively resists malicious attacks that depend on the background knowledge. The potential problem of obtaining personal information by guessing unknown sensitive nodes of tree-type data is solved correspondingly. The better privacy preservation and accuracy of this new algorithm are shown by simulation experiments. © 1990-2011 Beijing Institute of Aerospace Information. 展开更多
关键词 Budget control Data mining Decision trees Trees (mathematics)
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Compact phase-lock loop for external cavity diode lasers 被引量:2
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作者 魏春华 颜树华 +3 位作者 贾爱爱 罗玉昆 胡青青 厉泽环 《Chinese Optics Letters》 SCIE EI CAS CSCD 2016年第5期57-60,共4页
We present a compact, low-noise, and inexpensive optical phase-lock loop (OPLL) system to synchronize the frequency and the phase between two external cavity diode lasers. Based on a direct digital synthesizer tech-... We present a compact, low-noise, and inexpensive optical phase-lock loop (OPLL) system to synchronize the frequency and the phase between two external cavity diode lasers. Based on a direct digital synthesizer tech- nique, a programmable radio-frequency generator is implemented as the reference signal source. The OPLL has a narrow beat note linewidth below 1 Hz and a residual mean-square phase error of 0.06 rad2 in a 10 MHz integration bandwidth. The experimental test results prove the competent performance of the system, which is promising as a low-budget choice in atomic physics applications. 展开更多
关键词 Atomic physics Budget control Digital radio Laser resonators Locks (fasteners) Semiconductor lasers
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Upstream dispersion management of 25 Gb/s duobinary and PAM-4 signals to support 0–40 km differential reach 被引量:1
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作者 计红林 义理林 +1 位作者 薛雷 胡卫生 《Chinese Optics Letters》 SCIE EI CAS CSCD 2017年第2期78-82,共5页
We extensively discuss 25 Gb/s per wavelength capacity in both IEEE and ITU-T standardization to support the increasing bandwidth requirement. In this Letter, we propose to use the optical dispersion compensation tech... We extensively discuss 25 Gb/s per wavelength capacity in both IEEE and ITU-T standardization to support the increasing bandwidth requirement. In this Letter, we propose to use the optical dispersion compensation technique in an optical line terminal(OLT) combined with a bandwidth-limited electro-absorption modulated laser in an optical network unit to achieve 25 Gb/s capacity for the upstream link. We evaluate the positive and negative dispersion tolerances of 25 Gb/s electrical duo-binary(EDB) and pulse-amplitude modulation(PAM-4) signals. We achieve 39.5 and 31 d B upstream loss budgets for the 25 Gb/s EDB and PAM-4 signals by using-600 and-500 ps∕nm optical dispersion compensation in OLT, respectively, both supporting 0–40 km differential reach. 展开更多
关键词 BANDWIDTH Budget control Dense wavelength division multiplexing Dispersion (waves) Dispersion compensation
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Ultraviolet photodetector with bandpass characteristic based on a blend of PVK and PBD 被引量:2
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作者 孙建 彭宽军 +4 位作者 朱璐 胡佐富 代千 张希清 王永生 《Chinese Optics Letters》 SCIE EI CAS CSCD 2011年第5期78-80,共3页
We fabricate an ultraviolet photodetector based on a blend of poly (N-vinylcarbazole) (PVK) and 2- tert-butylphenyl-5-biphenyl-1, 3, 4-oxadiazole (PBD) using spin coating. The device exhibites a low dark current... We fabricate an ultraviolet photodetector based on a blend of poly (N-vinylcarbazole) (PVK) and 2- tert-butylphenyl-5-biphenyl-1, 3, 4-oxadiazole (PBD) using spin coating. The device exhibites a low dark current density of 2.2×10 3 μA/cm 2 at zero bias. The spectral response of the device shows a narrow bandpass characteristic from 300 to 355 nm, and the peak response is 18.6 mA/W located at 334 nm with a bias of –1 V. We also study the performances of photodetectors with different blend layer thicknesses. The largest photocurrent density is obtained with a blend of 90 nm at the same voltage. 展开更多
关键词 Budget control PHOTODETECTORS
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