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| 1 | Reverse reconciliation for continuous variable quantum key distribution显示文摘An efficient and practical post-processing technique based on reverse reconciliation for continuous variable quantum key distribution is proposed and simulated with low-density parity check (LDPC) codes. MultiLevel Coding/ MultiStage Decoding, which fully utilizes optimization technique such as vector quantization and iterative decoding and the optimal channel coding most close to the Shannon limit, was used to realize efficient reverse reconciliation algorithm. Simulation results showed that the proposed method can improve the secure key distribution rate to 2.2 kb/s and the coding efficiency to 0.89 over 20 km in single-mode optical fiber. Moreover, there still is room for much improvement. | LU ZhiXin 1,2 , YU Li 1,2 , LI Kang 1,2 , LIU BingCan 1,2,3 , LIN JianGui 1,2 , JIAO RongZhen 1,2 & YANG BoJun 1,21 School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China 2 Key Laboratory of Information Photonics and Optical Communication, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China 3 Department of Fundamental Courses, Academy of Armored Force Engineering, Beijing 100072, China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，1： | 12 |
| 2 | Community Characteristics of Wild Fruit Forests Along Elevation Gradients and the Relationships Between the Wild Fruit Forests and Environments in the Keguqin Mountain Region ofⅠii显示文摘In this paper,the quantitative relationship between the wild fruit communities and direct environmental factors is discussed on the basis of detailed data on landscape scale habitats obtained through field vegetation investigation.The results from TWINSPAN and DCCA showed that:1) In the distribution sections of the wild fruit forest in the Keguqin Mountain region,the basic patterns characteristic of the different habitats are due to topographic factors,nutrients and moisture conditions;2) The elevation affected the most basic differentiation of plant communities in the study area,indicating that the elevation condition was the most important factor restricting the distribution of the wild fruit communities in the study area;3) The close relationship between the moisture content in the upper soil layer and the elevation reflected the influence of moisture conditions on both wild fruit and herb-layer communities;4) Nutrient differences not only indicated that the habitat conditions were different in themselves but also showed that the present nutrient conditions of the habitats were seriously affected by human activities.In summary,under complicated mountainous topographic conditions,the habitat conditions for the communities differed very significantly,and the combination of elevation,soil moisture content,total nitrogen,slope aspect,and pH value influenced and controlled the formation of community distribution patterns in the study area. | ZHUANG Li TIAN Zhonping CHEN Yaning LI Weihong LI Jiangui LU Shuang | 2012 | Journal of Mountain Science2012，9，1： | 4 |
| 3 | Harmonic analysis and comparison of permanent magnet vernier and magnetic-geared machines显示文摘 | Li Jiangui Chau K T Li Wenlong | | 0，，10： | 1 |
| 4 | Lateral and an- gular misalignments analysis of a new PCB circular spiral resonant wireless charger显示文摘 | Wang Junhua Li Jiangui Ho SL | 2012 | IEEE Transactions on Mag- netics2012，48，11： | 1 |
| 5 | Lateral and Angular Misalignments Analysis of a New PCB Circular Spiral Resonant Wireless Charger显示文摘 | Junhua Wang Jiangui Li S L Ho | 2012 | IEEE TRANSAC- TIONS ON MAGNETICS2012，48，45： | 1 |
| 6 | A new efficient perma- nent- magnet vernier machine for wind power generation 显示文摘 | LI Jiangui CHAU K T JIANG J Z | 2010 | IEEE Transactions on Magnetics2010，46，6： | 1 |
| 7 | Anew efficient permanent-magnet vernier machine for wind power generation显示文摘 | Li Jiangui Chau K T Jiang J Z | 2010 | IEEE Transactions on Magnetics2010，46，6： | 1 |
| 8 | Harmonic Analysis and Com- parison of Permanent Magnet Vernier and Magnetic-C, eared Ma- chines显示文摘 | Li Jiangui Chau K T Li Weniong | 2011 | IEEE Transactions on Magnetics2011，47，10： | 1 |
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