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142篇 您的检索式:作者名="CHEN DaJun"
    题名 作者 年代 出处 被引量
1New double Wronskian solutions of the AKNS equation显示文摘Soliton solutions, rational solutions, Matveev solutions, complexitons and interaction solutions of the AKNS equation are derived through a matrix method for constructing double Wronskian entries. The latter three solutions are novel. Moreover, rational solutions of the nonlinear Schrodinger equation are obtained by reduction.CHEN DenYuan ZHANG DaJun BI JinBo 2008Science China Mathematics2008,51,1:8
2Real-time compensation of phase drift for phase-encoded quantum key distribution systems显示文摘Phase drift is an inherent problem in phase-encoded quantum key distribution(QKD) systems.The current active phase trackingand compensation solutions cannot satisfy the requirements of a system with nonlinearity in phase modulation.This paper presents a four-phase scanning method,which is based on the quantitative analysis of the quantum bit error rate(QBER) from phasedrift and the performance requirements of phase compensation.By obtaining the four interference fringes and adjusting the codingmatrix of the system,this method automatically calculates the accurate driving voltages for the phase modulator.The implementation and experimental tests show that the proposed method can compensate phase drift caused by environmental changes and thesystem's nonlinearity,and is applicable to large-scale QKD networks.ZHANG LiJun WANG YongGang YIN ZhenQiang CHEN Wei YANG Yang ZHANG Tao HUANG DaJun WANG Shuang LI FangYi HAN ZhengFu 2011Chinese Science Bulletin2011,56,22:6
3IL-17 sustains the plasma cell response via p38-mediated Bcl-xL RNA stability in lupus pathogenesis显示文摘Recent studies have demonstrated a central role for plasma cells in the development of autoimmune diseases,such as systemic lupus erythematosus(SLE).Currently,both the phenotypic features and functional regulation of autoreactive plasma cells during SLE pathogenesis remain largely unclear.In this study,we first found that a major subset of IL-17 receptor-expressing plasma cells potently produced anti-dsDNA IgG upon IL-17A(IL-17)stimulation in SLE patients and lupus mice.Using a humanized lupus mouse model,we showed that the transfer of Th17 cell-depleted PBMCs from lupus patients resulted in a significantly reduced plasma cell response and attenuated renal damage in recipient mice compared to the transfer of total SLE PBMCs.Moreover,long-term BrdU incorporation in lupus mice detected highly enriched long-lived BrdU+subsets among IL-17 receptor-expressing plasma cells.Lupus mice deficient in IL-17 or IL-17 receptor C(IL-17RC)exhibited a diminished plasma cell response and reduced autoantibody production with attenuated renal damage,while the adoptive transfer of Th17 cells triggered the plasma cell response and renal damage in IL-17-deficient lupus mice.In reconstituted chimeric mice,IL-17RC deficiency resulted in severely impaired plasma cell generation but showed no obvious effect on germinal center B cells.Further mechanistic studies revealed that IL-17 significantly promoted plasma cell survival via p38-mediated Bcl-xL transcript stabilization.Together,our findings identified a novel function of IL-17 in enhancing plasma cell survival for autoantibody production in lupus pathogenesis,which may provide new therapeutic strategies for the treatment of SLE.Kongyang Ma Wenhan Du Fan Xiao Man Han Enyu Huang Na Peng Yuan Tang Chong Deng Lixiong Liu Yulan Chen Jingjing Li Shiwen Yuan Qin Huang Xiaoping Hong Dajun Hu Xiaoyan Cai Quan Jiang Dongzhou Liu Liwei Lu 2021Cellular & Molecular Immunology2021,18,7:6
4Characterization of a PDR type ABC transporter gene from wheat (Triticum aestivum L.)显示文摘DON, as a virulence factor, plays an important role in the infection of Fusarium graminearum in wheat. The infection ability of F. graminearum depends on its capacity of producing DON. The production of DON by F. graminearum is significantly decreased in the wheat varieties with scab resistance. In this study, GeneChip analysis indicated that an EST encoding an ATP-binding cassette (ABC) transporter was up-regulated by 45 times in a wheat landrace Wangshuibai, which is resistant to DON accumulation. A pair of EST-derived primers were designed based on the EST sequence, and a clone was then isolated from a wheat genomic DNA TAC library. The TAC clone was sequenced using chromosome walking and gene prediction was conducted using Softberry. A cDNA clone of this gene was subsequently isolated from Wangshuibai induced by DON using gene-specific primers designed according to the untranslated sequence of the gene. The genome size of the gene is 7377 bp, consisting of 19 exons with coding sequences of 4308 bp. It encodes a protein with 1435 amino acid residues and the calculated molecular weight is about 161 kD. BLAST analysis indicated that the gene may belong to pleiotropic drug resistance (PDR) sub-family, and hence designated as TaPDR1 (Triticum aestivum pleiotropic drug resistance). TaPDR1 was located on chromosome 5A of wheat using nullisomic-tetrasomic lines of Chinese Spring. TaPDR1 was up-regulated by induction of both DON and F. graminearum. Expression patterns of TaPDR1 were different in wild-type Wangshuibai and the fast-neutron induced Wangshuibai mutant lacking FHB1, a major QTL of FHB resistance and DON resistance in chromosome arm 3BS. These results suggested that TaPDR1 might be a candidate gene responsible for DON ac-cumulation resistance. The expression profile showed that TaPDR1 expression was neither induced by hormones typically involved in biotic stress, such as JA and SA, nor by abiotic stresses, such as heat, cold, wounding and NaCl. However, TaPDR1 expression was regulated by Al3+ and [Ca2+], indicating that [Ca2+]i might mediate the signal of TaPDR1 expression.SHANG Yi XIAO Jin MA LuLin WANG HaiYan QI ZengJun CHEN PeiDu LIU DaJun WANG XiuE 2009Chinese Science Bulletin2009,54,18:3
5Optimal Control of Slurry Pressure during Shield Tunnelling Based on Random Forest and Particle Swarm Optimization显示文摘The control of slurry pressure aiming to be consistent with the external water and earth pressure during shield tunnelling has great significance for face stability,especially in urban areas or underwater where the surrounding environment is very sensitive to the fluctuation of slurry pressure.In this study,an optimal control method for slurry pressure during shield tunnelling is developed,which is composed of an identifier and a controller.The established identifier based on the random forest(RF)can describe the complex non-linear relationship between slurry pressure and its influencing factors.The proposed controller based on particle swarm optimization(PSO)can optimize the key factor to precisely control the slurry pressure at the normal state of advancement.A data set from Tsinghua Yuan Tunnel in China was used to train the RF model and several performance measures like R2,RMSE,etc.,were employed to evaluate.Then,the hybrid RF-PSO control method is adopted to optimize the control of slurry pressure.The good agreement between optimized slurry pressure and expected values demonstrates a high identifying and control precision.Weiping Luo Dajun Yuan Dalong Jin Ping Lu Jian Chen 2021Computer Modeling in Engineering & Sciences2021,,7:3
6Preparation and characterization of graphite nanosheets from ultrasonic powdering technique显示文摘Guohua Chen Wengui Weng Dajun Wu Cuiling Wu Jinrong Lu Pingping Wang Xiangfeng Chen 2004Carbon2004,,4:2
7Self-excited Vibration of The Shell-Liquid Coupled System Induced by Dry Fuication-The Vibration Mechanism of The Chinese Culture Relic Dragon Washbasin显示文摘Liu Xijun Wang Dajun Chen Yushu 1995ACTA MECHANICAL SINICA1995,11,4:1
8The application of chaotic oscillators to weak signal detection显示文摘Guanyu Wang Dajun Chen Jianya Lin 2001IEEE Transactions on Industrial Electronics2001,46,2:1
9High-order self-excited vibration induced by dry reaction between two elastic structures-vibration mechanism of the Chinese culture relic dragon washbasin 显示文摘Liu Xijun Wang Dajun Chen Yushu 2001Acta Mechanica Sinica2001,17,4:1
10Study on the Nonisothermal Crystallization Behavior of Poly (vinyl alcohol )/Attapulgite Nanocomposites by DSC Analysis 显示文摘Peng Zhiqin Chen Dajun 2006Journal of Polymer Science Part B: Polymer Physics2006,44,3:1
11Mechanical and thermal properties of fly ash/reclaimed rubber composites improved by KH 550 cou- pling agent 显示文摘Wu Weili Chen Dajun 2008Int Polym Process2008,23,2:1
12Mechanical and thermal properties of fly ash/reclaimed rubber composites improved by KH 550 cou- pling agent 显示文摘Wu Weili Chen Dajun 2008Int Polym Process2008,23,2:1
13Preparation and characterization of waterborne polyurethane/attapulgite nanoeomposites显示文摘Hongxia Pan Dajun Chen 2007European Polymer Journal2007,43,9:1
14Nonlinear conduction in nylon/foliated graphite nanocomposites above the percolation threshold显示文摘Chen Guohua Weng Wengui Wu Dajun 2004J Polym Sci Part (B): Polym Phys2004,42,1:1
15Exfoliation of graphite flake and its nanocomposites 显示文摘CHEN GUOHUA WU DAJUN WENG WENGU 2003Carbon2003,41,3:1
16Exfoliation of graphite flake and its nanocomposites显示文摘Guohua Chen Dajun Wu Wengui Weng Cuiling Wu 2002Carbon2002,,3:1
17The Application of Chaotic Oscillators to Weak Signal Detection 显示文摘 CHEN Dajun CHEN Xing LIN Jianyan 1999IEEE Transactions on Industrial Electronics1999,46,2:1
18The Application of Chaotic Oscillators to Weak Signal Dectection显示文摘WANG Guangyu CHEN Dajun LIN Jianya CHEN Xing 1999IEEE Transactions on Industrial Electronics1999,46,2:1
19Evaluation and prediction of earth pressure balance shield performance in complex rock strata:A case study in Dalian,China显示文摘This research explores the potential for the evaluation and prediction of earth pressure balance shield performance based on a gray system model.The research focuses on a shield tunnel excavated for Metro Line 2 in Dalian,China.Due to the large error between the initial geological exploration data and real strata,the project construction is extremely difficult.In view of the current situation regarding the project,a quantitative method for evaluating the tunneling efficiency was proposed using cutterhead rotation(R),advance speed(S),total thrust(F)and torque(T).A total of 80 datasets with three input parameters and one output variable(F or T)were collected from this project,and a prediction framework based gray system model was established.Based on the prediction model,five prediction schemes were set up.Through error analysis,the optimal prediction scheme was obtained from the five schemes.The parametric investigation performed indicates that the relationships between F and the three input variables in the gray system model harmonize with the theoretical explanation.The case shows that the shield tunneling performance and efficiency are improved by the tunneling parameter prediction model based on the gray system model.Xiang Shen Dajun Yuan Xing-Tao Lin Xiangsheng Chen Yuansheng Peng 2023Journal of Rock Mechanics and Geotechnical Engineering2023,15,6:1
20Thermal and mechanical properties of silicon rubber/cis-polybutadiene rubber/ethylene-propylene-diene monomer blends显示文摘Weili Wu Dajun Chen 2006J Appl Polym Sci2006,101,6:1
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