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| 1 | Coordinated Multiple Spacecraft Attitude Control with Communication Time Delays and Uncertainties显示文摘In this paper, we consider the coordinated attitude control problem of spacecraft formation with communication delays, model and disturbance uncertainties, and propose novel synchronized control schemes. Since the attitude motion is essential in non-Euclidean space, thus, unlike the existing designs which describe the delayed relative attitude via linear algorithm, we treat the attitude error and the local relative attitude on the nonlinear manifold-Lie group, and attempt to obtain coupling attitude information by the natural quaternion multiplication. Our main focus is to address two problems:1) Propose a coordinated attitude controller to achieve the synchronized attitude maneuver, i.e., synchronize multiple spacecraft attitudes and track a time-varying desired attitude; 2) With known model information, we achieve the synchronized attitude maneuver with disturbances under angular velocity constraints. Especially, if the formation does not have any uncertainties, the designer can simply set the controller via an appropriate choice of control gains to avoid system actuator saturation. Our controllers are proposed based on the Lyapunov-Krasovskii method and simulation of a spacecraft formation is conducted to demonstrate the effectiveness of theoretical results. | LI Guiming LIU Liangdong | 2012 | Chinese Journal of Aeronautics2012，25，5： | 5 |
| 2 | Regularized Robust Filter for Spacecraft Attitude Determination显示文摘一个修改调整柔韧的过滤器面对态度传感器的相对错误排列为太空船态度决心被建议。在在测量模型有参量的无常条件下,过滤器被设计最小化最糟可能的剩余标准。剩余标准的 weighting 矩阵被设计最小化评价错误变化的上面的界限。建议态度决心的性能柔韧的过滤器从一个真实三漂流的回转仪与真实测试数据的使用被说明。模拟结果证明态度评价精确性被使用建议算法改进。 | XIONG Kai LIU Liangdong LIU Yiwu | 2011 | Chinese Journal of Aeronautics2011，24，4： | 4 |
| 3 | The electrolyte comprising more robust water and superhalides transforms Zn-metal anode reversibly and dendrite-free显示文摘A great challenge for all aqueous batteries,including Zn-metal batteries,is the parasitic hydrogen evolution reaction on the low-potential anode.Herein,we report the formula of a highly concentrated aqueous electrolyte that mitigates hydrogen evolution by transforming water molecules more inert.The electrolyte comprises primarily ZnCl_(2) and LiCl as an additive,both of which are inexpensive salts.The O-H covalent bonds in water get strengthened in a chemical environment that has fewer hydrogen bonding interactions and a greater number of Zn-Cl superhalides,as suggested by integrated characterization and simulation.As a result,the average Coulombic efficiency of zincmetal anode is raised to an unprecedented>99.7%at 1mA cm^(−2).In the new electrolyte,the plating/stripping processes leave the zinc-metal anode dendrite-free,and the zinc-metal anode delivers stable plating/stripping cycles for 4000 hours with an areal capacity of 4 mAh cm^(−2) at 2mA cm^(−2).Furthermore,the high Coulombic efficiency of zinc-metal anode in the ZnCl_(2)-LiCl mixture electrolyte is demonstrated in full cells with a limited anode.The V_(2)O_(5)·H_(2)O||Zn full cell with an N/P mass ratio of 1.2 delivers a stable life of more than 2500 cycles,and the LiMn_(2)O_(4)||Zn hybrid cell with an N/P mass ratio of 0.6 exhibits 1500 cycles in its stable life. | Chong Zhang Woochul Shin Liangdong Zhu Cheng Chen Joerg C.Neuefeind Yunkai Xu Sarah I.Allec Cong Liu Zhixuan Wei Aigerim Daniyar Jia‐Xing Jiang Chong Fang P.Alex Greaney Xiulei Ji | 2021 | Carbon Energy2021，3，2： | 3 |
| 4 | Effect of tether flexibility on the tethered shuttle subsatellite stability and control 显示文摘 | LIU LIANGDONG BAINUM P M | 1989 | Journal of Guidance Control and Dynamics1989，12，6： | 1 |
| 5 | Modi- fied unscented Kalman fihering and its application in au- tonomous satellite navigation 显示文摘 | XIONG Kai LIU Liangdong ZHANG Hongyue | 2009 | Aerospace Science and Technology2009，13，45： | 1 |
| 6 | Fuel eells based on electrolyte and non-electrolyte separators 显示文摘 | Bin Zhu Rizwan Raza Haiying Qin Qinghua Liu Liangdong Fan | 2011 | Energy & Environmental Science2011，4，： | 1 |
| 7 | The use of X-ray pulsars for aiding navigation of satellites in constellations显示文摘 | Xiong Kai Wei Chunling Liu Liangdong | 2008 | Acta Astronautica2008，，4： | 1 |
| 8 | Pathways for Degrading TNT by Thu-Z: a Pantoea sp. Strain显示文摘 | Liangdong Zou Diannan Lu Zheng Liu | 2012 | Applied Biochemistry and Biotechnology2012，，7： | 1 |
| 9 | New approaches for developing transient electrochemical multi-component gas sensors显示文摘 | Zhou Zhongbai Feng Liangdong Liu Wenjun Wu Zhigang | 2001 | Sensors and Actuators2001，76，： | 1 |
| 10 | Adaptive Robust Extended Kalman Filter for Nonlinear Stochastic Systems显示文摘 | Xiong Kai Wei Chunling Liu Liangdong | 2008 | IET Control Theory and Applications2008，2，3： | 1 |
| 11 | Effective Vietnamese Sentiment Analysis Model Using Sentiment Word Embedding and Transfer Learning显示文摘Sentiment analysis is one of the most popular fields in NLP,and with the development of computer software and hardware,its application is increasingly extensive.Supervised corpus has a positive effect on model training,but these corpus are prohibitively expensive to manually produce.This paper proposes a deep learning sentiment analysis model based on transfer learning.It represents the sentiment and semantics of words and improves the effect of Vietnamese sentiment analysis model by using English corpus.It generated semantic vectors through Word2Vec,an open-source tool,and built sentiment vectors through LSTM with attention mechanism to get sentiment word vector.With the method of sharing parameters,the model was pre-training with English corpus.Finally,the sentiment of the text was classified by stacked Bi-LSTM with attention mechanism,with input of sentiment word vector.Experiments show that the model can effectively improve the performance of Vietnamese sentiment analysis under small language materials. | Yong Huang Siwei Liu Liangdong Qu Yongsheng Li | 2020 | 国际计算机前沿大会会议论文集2020，，2： | 0 |
| 12 | Enhanced cathodic activity by tantalum inclusion at B-site of La_(0.6)Sr_(0.4)Co_(0.4)Fe_(0.6)O_(3)based on structural property tailored via camphor-assisted solid-state reaction显示文摘Lanthanum strontium cobalt ferrite(LSCF)is an appreciable cathode material for solid oxide fuel cells(SOFCs),and it has been widely investigated,owing to its excellent thermal and chemical stability.However,its poor oxygen reduction reaction(ORR)activity,particularly at a temperature of≤800℃,causes setbacks in achieving a peak power density of>1.0 W·cm^(-2),limiting its application in the commercialization of SOFCs.To improve the ORR of LSCF,doping strategies have been found useful.Herein,the porous tantalum-doped LSCF materials(La_(0.6)Sr_(0.4)Co_(0.4)Fe_(0.5)7Ta_(0.03)O_(3)(LSCFT-0),La_(0.6)Sr_(0.4)Co_(0.4)Fe_(0.5)4Ta0.06O_(3),and La_(0.6)Sr_(0.4)Co_(0.4)Fe_(0.5)Ta0.1O_(3))are prepared via camphor-assisted solid-state reaction(CSSR).The LSCFT-0 material exhibits promising ORR with area-specific resistance(ASR)of 1.260,_(0.5)80,0.260,0.100,and 0.06Ω·cm^(2)at 600,650,700,750,and 800℃,respectively.The performance is about 2 times higher than that of undoped La_(0.6)Sr_(0.4)Co_(0.4)Fe_(0.6)O_(3)with the ASR of 2.515,1.191,_(0.5)96,0.320,and 0.181Ω·cm^(2)from the lowest to the highest temperature.Through material characterization,it was found that the incorporated Ta occupied the B-site of the material,leading to the enhancement of the ORR activity.With the use of LSCFT-0 as the cathode material for anode-supported single-cell,the power density of>1.0 W·cm^(-2)was obtained at a temperature<800℃.The results indicate that the CSSR-derived LSCFT is a promising cathode material for SOFCs. | Dingyu XIONG Sefiu Abolaji RASAKI Yangpu LI Liangdong FAN Changyong LIU Zhangwei CHEN | 2022 | Journal of Advanced Ceramics2022，11，8： | 0 |
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