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| 1 | Fabricating Pd isolated single atom sites on C3N4/rGO for heterogenization of homogeneous catalysis显示文摘Metal isolated single atomic sites catalysts have attracted intensive attention in recent years owing to their maximized atom utilization and unique structure.Despite the success of single atom catalyst synthesis,directly anchoring metal single atoms on three-dimensional(3D)macro support,which is promising to achieve the heterogenization of homogeneous catalysis,remains a challenge and a blank in this field.Herein,we successfully fabricate metal single atoms(Pd,Pt,Ru,Au)on porous carbon nitride/reduced graphene oxide(C3N4/rGO)foam as highly efficient catalysts with convenient recyclability.C3N4/rGO foam features two-dimensional microstructures with abundant N chelating sites for the stabilization of metal single atoms and vertically-aligned hierarchical mesostructure that benefits the mass diffusion.The obtained Pdi/C3N4/rGO monolith catalyst exhibits much enhanced activity over its nanoparticle counterpart for Suzuki-Miyaura reaction.Moreover,the Pdi/C3N4/rGO monolith catalyst can be readily assembled in a flow reactor to achieve the highly efficient continuous production of 4-nitro-1,1'-biphenyl through Suzuki-Miyaura coupling. | Ninghua Fu Xiao Liang Zhi Li Wenxing Chen Yu Wang Lirong Zheng Qinghua Zhang Chen Chen Dingsheng Wang Qing Peng Lin Gu Yadong Li | 2020 | Nano Research2020，13，4： | 5 |
| 2 | Optimal two-iteration sculling compensation mathematical framework for SINS velocity updating显示文摘A new two-iteration sculling compensation mathematical framework is provided for modern-day strapdown inertial navigation system(SINS) algorithm design that utilizes a new concept in velocity updating. The principal structure of this framework includes twice sculling compensation procedure using incremental outputs from the inertial system sensors during the velocity updating interval. Then, the moderate algorithm is designed to update the velocity parameter. The analysis is conducted in the condition of sculling motion which indicates that the new mathematical framework error which is smaller than the conventional ones by at least two orders is far superior. Therefore, a summary is given for SINS software which can be designed with the new mathematical framework in velocity updating. | Tong Zhang Kang Chen Wenxing Fu Yunfeng Yu Jie Yan | 2014 | Journal of Systems Engineering and Electronics2014，25，6： | 4 |
| 3 | Lightweight hybrid visual-inertial odometry with closed-form zero velocity update显示文摘Visual-Inertial Odometry(VIO) fuses measurements from camera and Inertial Measurement Unit(IMU) to achieve accumulative performance that is better than using individual sensors.Hybrid VIO is an extended Kalman filter-based solution which augments features with long tracking length into the state vector of Multi-State Constraint Kalman Filter(MSCKF). In this paper, a novel hybrid VIO is proposed, which focuses on utilizing low-cost sensors while also considering both the computational efficiency and positioning precision. The proposed algorithm introduces several novel contributions. Firstly, by deducing an analytical error transition equation, onedimensional inverse depth parametrization is utilized to parametrize the augmented feature state.This modification is shown to significantly improve the computational efficiency and numerical robustness, as a result achieving higher precision. Secondly, for better handling of the static scene,a novel closed-form Zero velocity UPda Te(ZUPT) method is proposed. ZUPT is modeled as a measurement update for the filter rather than forbidding propagation roughly, which has the advantage of correcting the overall state through correlation in the filter covariance matrix. Furthermore, online spatial and temporal calibration is also incorporated. Experiments are conducted on both public dataset and real data. The results demonstrate the effectiveness of the proposed solution by showing that its performance is better than the baseline and the state-of-the-art algorithms in terms of both efficiency and precision. A related software is open-sourced to benefit the community. | QIU Xiaochen ZHANG Hai FU Wenxing | 2020 | Chinese Journal of Aeronautics2020，33，12： | 3 |
| 4 | Smart homing guidance strategy with control saturation against a cooperative target-defender team显示文摘A smart homing guidance strategy with control saturation against a target-defender team is derived. It is noteworthy that a cooperative strategy of the target-defender team is applied,which has been proved more challenging for the homing guidance.The defender missile is launched by the target and guided by a cooperative augmented proportional navigation(APN). At the same time, the target performs a one-switch maneuver to cooperate and minimize the defender's acceleration requirement. The problem is analyzed for arbitrary-order linear dynamics of the agents in the linearized form but validated by the mathematical simulations by using nonlinear kinematics. The perfect information of three agents' states is assumed. Then, a method to deal with the target-defender team is proposed. It contains a combined performance index penalizing the miss distance relative to the target and energy consumption in the whole duration. Besides, the specific miss distance related to the defender is regarded as an inequality constraint. An analytical solution for the smart guidance strategy against the APN guided defender is derived. Meanwhile, the control saturations are introduced to get more realistic and reasonable insights to this practical target-missile-defender problem. A simple but effective iterative searching technique is proposed to determine the saturation time points. The solution provides an optimal homing strategy to evade the defender with a specific miss distance and intercept the target with the minimum miss distance in the minimum energy manner. Nonlinear two-dimensional simulation results are used to validate the theoretical analysis. By comparison with the optimal differential game guidance(ODGG) and the combined minimum effort guidance(CMEG), the superiority of this smart guidance strategy is concluded. | GUO Hang FU Wenxing FU Bin CHEN Kang YAN Jie | 2019 | Journal of Systems Engineering and Electronics2019，30，2： | 2 |
| 5 | The effect of variants in the promoter of BMPER on the intramuscular fat deposition in longissimus dorsi muscle of pigs显示文摘 | Zhi Liu Wenxing Sun Yongyan Zhao Chunying Xu Yingying Fu Yan Li Jie Chen | 2014 | Gene2014，，2： | 1 |
| 6 | A Sequential Convexification Method (SCM) for Continuous Global Optimization 显示文摘 | Zhu Wenxing Fu Qingxiang | 2003 | Journal of Global Optimization2003，，26： | 1 |
| 7 | Antioxidant high-conductivity copper paste for low-cost flexible printed electronics显示文摘The flexible printed electronics(e.g.,wearable devices,roll-up displays,heating circuits,radio frequency identification(RFID)tags)calls for high-conductivity and low-cost materials,particularly for copper pastes.It is still a big challenge to develop reliable copper pastes for both antioxidant and high-conductivity flexible printed films and lines.In this work,an antioxidant copper paste was achieved using copper microflakes with surface passivation by formate ions and thiols,with high conductivity of 13400 S cm^(−1)(the same order of magnitude of silver pastes,1.8-2.5×10^(4) S cm^(−1)).The universal applications of as-prepared copper paste in flexible printed electronics(e.g.,electromagnetic interference(EMI)shielding films,anti-fog films,and RFID tags)via screen printing and curing at 170℃ under ambient atmosphere were demonstrated.The as-printed electronics showed high performance in flexibility,stability,and reliability.This work shows the great potential of anti-oxidation copper pastes in low-cost flexible printed electronics for commercial usage. | Shuqing Hong Chimin Liu Shuqiang Hao Wenxing Fu Jian Peng Binghui Wu Nanfeng Zheng | 2022 | npj Flexible Electronics2022，6，1： | 1 |
| 8 | Targeted editing of goat genome with modular-assembly zinc finger nucleases based on activity prediction by computational molecular modeling显示文摘 | Kai Xiong Shanshan Li Hongxiao Zhang Ye Cui Debing Yu Yan Li Wenxing Sun Yingying Fu Yun Teng Zhi Liu Xiaolong Zhou Peng Xiao Juan Li Honglin Liu Jie Chen | 2013 | Molecular Biology Reports2013，，7： | 1 |
| 9 | Aero-thermal heating constrained midcourse guidance using state-constrained model predictive static programming method显示文摘This paper proposes a multiple-constraints-guaranteed midcourse guidance law for the interception of the hypersonic targets. In traditional midcourse law design, the constraints of the aero-thermal heating are rarely taken into consideration. The performance of the infrared detection system may be degraded and the instability of the flight control system may be induced.To address this problem, a state-constrained model predictive static programming method is introduced such that both terminal constraints(position and angle) and optimal energy consumption can be ensured. As a result, a sub-optimal midcourse guidance,guaranteeing the aforementioned multiple-constraints to be never violated, is synthesized. Simulation results demonstrate the effectiveness of the proposed method. | FU Bin GUO Hang CHEN Kang FU Wenxing WU Xingyu YAN Jie | 2018 | Journal of Systems Engineering and Electronics2018，29，6： | 0 |
| 10 | Liquefaction of Banana Pseudo-stem and Preparation of Polyurethane Adhesive from Liquefied Products显示文摘Banana pseudo-stem was liquefied in the mixture of polyhydric alcohols of polyethylene glycol(PEG400) and glycerol. Hydroxyl value of liquefied products ranged from 294.8 to 370.2 mg KOH/g and M_n was about 430. Liquefied products(LBPP) could be used as raw materials for polyurethane by reacting with 4, 4'-diphenylmethane diisocyanate(4, 4'-MDI) and PEG400 to synthesize liquefied product-based polyurethane(LBPP-PU) adhesive. To analyze in depth the creation of urethane linkage among LBPP, PEG400 and 4, 4'-MDI, factors which had effects on the residue content were all investigated. They were characterized by FT-IR and TG. The shear strength of LBPP-PU adhesive was improved when decreasing the percentage of the substitution of PEG400 by LBPP. The adhesive strength was obtained from T-peel of aspen/polyurethane adhesive joints, and the maximum lap shear strength(4.40 MPa) was obtained when 16.70% of LBPP was added to the LBPP & PEG400 system. | 周威 FU Wenxing 张玉苍 | 2018 | Journal of Wuhan University of Technology(Materials Science)2018，33，6： | 0 |
| 11 | Impact angle constrained fuzzy adaptive fault tolerant IGC method for Ski-to-Turn missiles with unsteady aerodynamics and multiple disturbances显示文摘An impact angle constrained fuzzy adaptive fault tolerant integrated guidance and control method for Ski-to-Turn(STT)missiles subject to unsteady aerodynamics and multiple disturbances is proposed.Unsteady aerodynamics appears when flight vehicles are in a transonic state or confronted with unstable airflow.Meanwhile,actuator failures and multisource model uncertainties are introduced.However,the boundaries of these multisource uncertainties are assumed unknown.The target is assumed to execute high maneuver movement which is unknown to the missile.Furthermore,impact angle constraint puts forward higher requirements for the interception accuracy of the integrated guidance and control(IGC)method.The impact angle constraint and the precise interception are established as the object of the IGC method.Then,the boundaries of the lumped disturbances are estimated,and several fuzzy logic systems are introduced to compensate the unknown nonlinearities and uncertainties.Next,a series of adaptive laws are developed so that the undesirable effects arising from unsteady aerodynamics,actuator failures and unknown uncertainties could be suppressed.Consequently,an impact angle constrained fuzzy adaptive fault tolerant IGC method with three loops is constructed and a perfect hit-to-kill interception with specified impact angle can be implemented.Eventually,the numerical simulations are conducted to verify the effectiveness and superiority of the proposed method. | GUO Hang WANG Zheng FU Bin CHEN Kang FU Wenxing YAN Jie | 2022 | Journal of Systems Engineering and Electronics2022，33，5： | 0 |
| 12 | Peroxidase-like single Fe atoms anchored on Ti_(3)C_(2)T_(x)MXene as surface enhanced Raman scattering substrate for the simultaneous discrimination of multiple antioxidants显示文摘Single-atom nanozymes(SAzymes)are emerging as promising alternatives to mimic natural enzyme,which is due to high atomic utilization efficiency,well-defined geometric,and unique electronic structure.Herein,Fe single atoms supported on Ti_(3)C_(2)T_(x)(Fe-SA/Ti_(3)C_(2)T_(x))with intrinsic peroxidase activity is developed,further constructing a sensitive Raman sensor array for sensing of five antioxidants.Fe-SA/Ti_(3)C_(2)T_(x)shows excellent peroxidase-like performance in catalyzing the oxidation of 3,3',5,5'-tetramethylbenzidine(TMB)with colorimetric reactions.X-ray adsorption fine structure(XAFS)reveals that the electron transport between the Ti_(3)C_(2)T_(x)and Fe atoms occurs along Fe-O-Ti ligands,meanwhile the density functional theory(DFT)calculations confirm the spontaneous dissociation of H_(2)O_(2)and the formation of OH radicals.Furthermore,the peroxidase-like Fe-SA/Ti_(3)C_(2)T_(x)was used as surface enhanced Raman scattering(SERS)substrate of oxidized TMB(TMB+)and achieved satisfied signal amplification performance.Using the blocking effects of free radical reactions,one-off identification of 5 antioxidants,including ascorbic acid(AA),uric acid(UA),glutathione(GSH),melatonin(Mel),and tea polyphenols(TPP),could be realized with this high identifiable catalytic property.This principle could realize 100%distinguish accuracy combined with linear discriminant analysis(LDA)and heat map data analysis.A wide detection concentration ranges from 10^(-8)to 10^(-3)M for five antioxidants was also achieved. | Hongyan Xi Hongfei Gu Yurui Han Tingting You Pengfei Wu Qingqing Liu Lirong Zheng Shuhu Liu Qiang Fu Wenxing Chen Yukun Gao Yuting Wang Penggang Yin | 2023 | Nano Research2023，16，7： | 0 |
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