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2. A reconfigurable multiple-format coherent-dual-band signal generator based on a single optoelectronic oscillation cavity

Author

Wang, Yibei, Wang, Yalan, Wang, Hongyi, Liu, Xiaotong, Chen, Hong, Zhang, Jin, Li, Dongyu, Wang, Dangwei, and Wang, Anle

Subjects
Physics - Optics, Electrical Engineering and Systems Science - Signal Processing
Abstract

An optoelectronic oscillation method with reconfigurable multiple formats for simultaneous generation of coherent dual-band signals is proposed and experimentally demonstrated. By introducing a compatible filtering mechanism based on stimulated Brillouin scattering (SBS) effect into a typical Phase-shifted grating Bragg fiber (PS-FBG) notch filtering cavity, dual mode-selection mechanisms which have independent frequency and time tuning mechanism can be constructed. By regulating three controllers, the proposed scheme can work in different states, named mode 1, mode 2 and mode 3. At mode 1 state, a dual single-frequency hopping signals is achieved with 50 ns hopping speed and flexible central frequency and pulse duration ratio. The mode 2 state is realized by applying the Fourier domain mode-locked (FDML) technology into the proposed optoelectrical oscillator, in which dual coherent pulsed single-frequency signal and broadband signal is generated simultaneously. The adjustability of the time duration of the single-frequency signal and the bandwidth of the broadband signal are shown and discussed. The mode 3 state is a dual broadband signal generator which is realized by injecting a triangular wave into the signal laser. The detection performance of the generated broadband signals has also been evaluated by the pulse compression and the phase noise figure. The proposed method may provide a multifunctional radar system signal generator based on the simply external controllers, which can realize low-phase-noise or multifunctional detection with high resolution imaging ability, especially in a complex interference environment., Comment: 12 pages, 8 figures

Published
2023

5. A New Hash-Based Enhanced Privacy ID Signature Scheme

Author

Chen, Liqun, Dong, Changyu, El Kassem, Nada, Newton, Christopher J. P., Wang, Yalan, Hartmanis, Juris, Founding Editor, van Leeuwen, Jan, Series Editor, Hutchison, David, Editorial Board Member, Kanade, Takeo, Editorial Board Member, Kittler, Josef, Editorial Board Member, Kleinberg, Jon M., Editorial Board Member, Kobsa, Alfred, Series Editor, Mattern, Friedemann, Editorial Board Member, Mitchell, John C., Editorial Board Member, Naor, Moni, Editorial Board Member, Nierstrasz, Oscar, Series Editor, Pandu Rangan, C., Editorial Board Member, Sudan, Madhu, Series Editor, Terzopoulos, Demetri, Editorial Board Member, Tygar, Doug, Editorial Board Member, Weikum, Gerhard, Series Editor, Vardi, Moshe Y, Series Editor, Goos, Gerhard, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Saarinen, Markku-Juhani, editor, and Smith-Tone, Daniel, editor

Published
2024
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7. Complete genome sequencing and BGLU gene family analysis of Angelica dahurica

Author

WANG Yalan, ZHOU Luojing, ZHANG Lingyu, ZHANG Jing, BIAN Jinhui, and GAO Jihai

Subjects
angelica dahurica var. formosana, genome, the third-generation sequencing technology, bglu gene family, medicinal plant, Botany, QK1-989
Abstract

Angelica dahurica is a common species of medicine and food homology, which is not only a common clinical traditional Chinese medicine, but also a spice, with a wide range of uses. In order to obtain the whole genome sequence information of A. dahurica, we used A. dahurica var. formosana leaf DNA as material, and the Nanopore sequencing technology was used to establish its nucleotide sequences database, then genome assembly, function annotation and evolution analysis were carried out by bioinformatic methods. The results were as follows:(1) A total of 662 Gb of the third-generation data were obtained after fittering the original sequencing data, with the Read N50 about 32 932 bp. The assembled A. dahurica genome size was 5.6 Gb, Contig N50 was about 806 638 bp. (2) The genes were with gene annotations accounted for 66.47% after being compared with functional databases such as NR, KOG and KEGG. The result of KOG gene annotation was that the protein function of A. dahurica concentrated in the general functional prediction, posttranslational modification, protein turnover, chaperones and signal transduction mechanisms. GO functional classification indicated that the genes of A. dahurica concentrated on cell biological processes and components. KEGG analysis found that the A. dahurica genes mostly involved in metabolic pathways. (3) And 45 genes of BGLU family were identified in A. dahurica. In this study, the whole genome of A. dahurica is resolved by the third-generation sequencing technology for the first time, which provides important theoretical references for the systematic biological study and the further study of the function of BGLU in the growth and development of A. dahurica.

Published
2024
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18. BAHS: A Blockchain-Aided Hash-Based Signature Scheme

Author

Wang, Yalan, Chen, Liqun, Meng, Long, Tian, Yangguang, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Meng, Weizhi, editor, Yan, Zheng, editor, and Piuri, Vincenzo, editor

Published
2023
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19. Hash-Based Direct Anonymous Attestation

Author

Chen, Liqun, Dong, Changyu, El Kassem, Nada, Newton, Christopher J. P., Wang, Yalan, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Johansson, Thomas, editor, and Smith-Tone, Daniel, editor

Published
2023
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22. Long-lasting humoral and cellular memory immunity to vaccinia virus Tiantan provides pre-existing immunity against mpox virus in Chinese population

Author

Li, Min, Guo, Yaxin, Deng, Yao, Gao, Wenhui, Huang, Baoying, Yao, Weiyong, Zhao, Yingze, Zhang, Qing, Huang, Mengkun, Liu, Maoshun, Li, Lei, Guo, Peipei, Tian, Jinmin, Wang, Xin, Lin, Ying, Gan, Jinxian, Guo, Yuanyuan, Hu, Yuechao, Zhang, Jianing, Yang, Xiaonan, Shang, Bingli, Yang, Mengjie, Han, Yang, Wang, Yalan, Cong, Peilei, Li, Mengzhe, Chu, Qiaohong, Zhang, Danni, Wang, Qihui, Zhang, Tong, Wu, Guizhen, Tan, Wenjie, Gao, George F., and Liu, Jun

Published
2024
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34. Influence of drying temperature on morphology of MAPbI$_3$ thin films and the performance of solar cells

Author

Zhang, Hao, Wang, Yalan, Wang, Hong, Ma, Meryang, Dong, Shuai, and Xu, Qingyu

Subjects
Physics - Applied Physics
Abstract

Photoelectric conversion efficiency of organic-inorganic perovskite solar cells has been rapidly raised and attracted great attention in recent years. The quality of perovskite films is vital for the performance of devices. We used the anti-solvent method to prepare CH$_3$NH$_3$PbI$_3$ thin films by spin coating and dried them at various temperature to transform adduct MAI.PbI$_2$.DMSO into CH$_3$NH$_3$PbI$_3$. We researched in detail on the relationship between surface morphology of MAPbI$_3$ thin films fabricated by the anti-solvent method and various drying temperature. We found that surface roughness and grain size of CH$_3$NH$_3$PbI$_3$ films together increased with increasing drying temperature. The larger grain size could efficiently reduce crystal boundaries which is advantageous for the suppression of photo-induced charge carrier recombination resulting in increase of FF. However, increase of surface roughness resulted in larger contact area at interface which might produce more tarp states and poorer wettability of HTM solution leading in decrease of Jsc. Surface morphology of MAPbI3 layer on the performance of solar cell devices is also an important research issue. By optimizing the drying temperature to 60 oC, the highest efficiency of 14.4% was achieved for the CH3NH3PbI3-based solar cell devices., Comment: 17 pages, 7 figures

Published
2018
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35. Research on RPC-SC System for Negative Sequence Current Compensation of Electrified Railway

Author

Wang, Ying, Mu, Xiuqing, Wang, Yalan, He, Zhengyou, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, Zhang, Junjie James, Series Editor, Liang, Jianying, editor, Liu, Zhigang, editor, Diao, Lijun, editor, and An, Min, editor

Published
2022
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