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| 1 | Guaranteed Cost Consensus for High-dimensional Multi-agent Systems With Time-varying Delays显示文摘Guaranteed cost consensus analysis and design problems for high-dimensional multi-agent systems with time varying delays are investigated. The idea of guaranteed cost con trol is introduced into consensus problems for high-dimensiona multi-agent systems with time-varying delays, where a cos function is defined based on state errors among neighboring agents and control inputs of all the agents. By the state space decomposition approach and the linear matrix inequality(LMI)sufficient conditions for guaranteed cost consensus and consensu alization are given. Moreover, a guaranteed cost upper bound o the cost function is determined. It should be mentioned that these LMI criteria are dependent on the change rate of time delays and the maximum time delay, the guaranteed cost upper bound is only dependent on the maximum time delay but independen of the Laplacian matrix. Finally, numerical simulations are given to demonstrate theoretical results. | Zhong Wang Ming He Tang Zheng Zhiliang Fan Guangbin Liu | 2018 | IEEE/CAA Journal of Automatica Sinica2018，5，1： | 8 |
| 2 | The point defect and electronic structure of K doped LaCo_(0.9)Fe_(0.1)O_(3)perovskite with enhanced microwave absorbing ability显示文摘ABO_(3)perovskites,owning unique properties,have great research prospect in electromagnetic wave absorption field.Normally,doping can significantly regulate the dielectric loss,whereas the magnetic loss can be ignored.In this work,the crystal structure and electromagnetic properties can be regulated systematically by the K,Fe co-doping for LaCoO_(3)perovskites(LKCFO)under the condition of fixed F content.In addition,the obtained samples show the obvious interfacial polarization effect on accounting to the small size effect,which is conducive to the effective microwave absorption.By analyzing the evolution of the positron annihilation lifetime and the first-principles calculation of the oxygen density of states for the series of LKCFO perovskites,it is found that the charge transport characteristics will be controlled by the point defect generated by allelic doping.The point defect content decreases and then increases as the doping level rises.The prepared perovskite exhibits the lowest defect density and the largest dielectric loss capability,which indicates that the lower point defects promote electron migration and thus enhance the dielectric loss;thus,the electromagnetic wave absorption bandwidth up to 6.2 GHz is reached.In contrast,both insufficient and excessive K doping are detrimental to the enhancement of microwave absorption.Especially,the practical application value was investigated using Computer Simulation Technology(CST)simulations.The LKCFO-2 exhibits the smallest RCS value(below-10 dBm^(2))at almost-90°-90°with a thickness of 2 mm,providing an effective method for study excellent microwave absorption and scattering property. | Fan Wang Weihua Gu Jiabin Chen Yue Wu Ming Zhou Shaolong Tang Xingzhong Cao Peng Zhang Guangbin Ji | 2022 | Nano Research2022，15，4： | 7 |
| 3 | Improved electromagnetic dissipation of Fe doping LaCoO_(3)toward broadband microwave absorption显示文摘Perovskite LaCoO_(3)is of great potential in electromagnetic wave absorption considering its outstanding dielectric loss as well as the existing magnetic response with the magnetic doping.However,the dissipation mechanism of the magnetic doping on the microwave absorption is lack of sufficient investigated.In this paper,LaCo_(1-x)Fe_(x)O_(3)(x=0,0.05,0.1,0.15,0.2,0.25,0.3,LCFOs)perovskites with different Fe doping amounts were prepared successfully by the sol-gel method and subsequent heat treatment in the air atmosphere.The structure characterization carried out by the frst-principles calculations shows the effect of Fe doping on the dielectric and magnetic properties of LCFOs and the strong hybridization of Co/Fe-3d with O-2p in the LCFOs system was successfully demonstrated.Particularly,when x=0.1 and the thickness is only 1.95 mm,the LaCo_(0.9)Fe_(0.1)O_(3)exhibits the best microwave absorption performance with the minimum reflection loss(RL)value of about-41 dB.The typical samples achieve a broad effective absorption bandwidth(EAB)of 5.16 GHz(7.92-13.08 GHz),which covers the total X band(8-12 GHz).Considering that,the especial Fe doping perovskite is promising to be a candidate as efficient microwave absorbers. | Fan Wang Weihua Gu Jiabin Chen Qianqian Huang Mingyang Han Gehuan Wang Guangbin Ji | 2022 | Journal of Materials Science & Technology2022，，10： | 6 |
| 4 | Degradation data-driven approach for remaining useful life estimation显示文摘Remaining useful life(RUL) estimation is termed as one of the key issues in prognostics and health management (PHM).To achieve RUL estimation for individual equipment,we present a degradation data-driven RUL estimation approach under the collaboration between Bayesian updating and expectation maximization(EM) algorithm.Firstly,we utilize an exponential-like degradation model to describe equipment degradation process and update stochastic parameters in the model via Bayesian approach. Based on the Bayesian updating results,both probability distribution of the RUL and its point estimation can be derived. Secondly,based on the monitored degradation data to date,we give a parameter estimation approach for non-stochastic parameters in the degradation model and prove that the obtained estimation is unique and optimal in each iteration.Finally,a numerical example and a practical case study for global positioning system (GPS) receiver are provided to show that the presented approach can model degradation process and achieve RUL estimation effectively and generate better results than a previously reported approach in literature. | Zhiliang Fan Guangbin Liu Xiaosheng Si Qi Zhang Qinghua Zhang | 2013 | Journal of Systems Engineering and Electronics2013，24，1： | 2 |
| 5 | Avoid in geographic routing for data aggregation in sensor networks 显示文摘 | Chen Shigang Fan Guangbin Cui Junhong | 2006 | International Journal of Ad Hoc and Ubiquitous Computing2006，1，4： | 1 |
| 6 | Avoid Void in Geographic Routing for Data Aggregation in Sensor Networks显示文摘 | Chen Shigang Fan Guangbin Cui Junhong | 2006 | International Journal of Ad Hoc and Ubiquitous Computing2006，1，4： | 1 |
| 7 | Power spectral analysis of smoothing pulse of the sufferer and the health woman′ finger end dimension pulse显示文摘 | LIU Guangbin FAN Xiaoli HUANG Luoxiu | 1990 | Journal of Xi′an Medical University1990，11，3： | 1 |
| 8 | Avoid 'Void' in geographic routing for data aggregation in sensor networks 显示文摘 | Shigang Chen Guangbin Fan Jun-Hong Cui | 2006 | International Journal of Ad Hoc and Ubiquitous Computing (I-JAHUC) Special Issue on Wireless Sensor Netw-orks2006，2，1： | 1 |
| 9 | Stereopsis after bilateral implantation of Toric intraocular lenses in high myopic cataract patients with astigmatism显示文摘Purpose:To evaluate near,intermediate,distance visual acuity and stereopsis after bilateral implantation of Toric intraocular lenses(IOLs)in high myopic patients with astigmatism.Methods:Bilateral Toric or non-Toric IOL implantation(n¼40 eyes each)was performed on high myopic cataract eyes with astigmatism.Best-corrected distance visual acuity(BCDVA),uncorrected intermediate visual acuity(UCIVA),uncorrected near visual acuity(UCNVA),residual refractive astigmatism(RRA),and near,intermediate,and distance stereoacuity were measured postoperatively at 7 days,1 month,and 3 months.Results:The three-month postoperative BCDVA,UCIVA,and UCNVA of the Toric group were 0.08±0.07,0.30±0.11,and 0.23±0.14 LogMAR.All improved over the preoperative assessments(P<0.05).The RRA,UCIVA,and UCNVA were significantly better in the Toric group than the non-Toric group at all follow-up examinations(all P<0.05).At 3 months,the median near and intermediate stereoacuity of the Toric group were 100(range 40–400)and 120(range 50–400)arcsec,which were better than the non-Toric group(both P<0.05).Fine near stereopsis100 arcsec was present in 65%of the Toric patients,and 50%had good intermediate stereopsis of100 arcsec.However among non-Toric patients,only 15%and 5%achieved fine near and intermediate stereopsis.The postoperative BCDVA and best-corrected distance stereoacuity were similar in the two groups(P>0.05).Conclusions:In bilateral high myopic cataract patients with astigmatism,Toric IOLs not only improved UCIVA,UCNVA,and RRA,but also enhanced near and intermediate stereopsis acuity. | Wei Fan Guangbin Zhang | 2023 | Advances in Ophthalmology Practice and Research2023，3，3： | 0 |
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