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| 1 | Curative effect of Dingqi analgesic patch on cancer pain:a single-blind randomized controlled trail显示文摘OBJECTIVE:To observe the curative effect of an acupoint application with a Dingqi analgesic patch on moderate to severe pain caused by liver cancer.METHODS:Forty patients with moderate to severe pain caused by liver cancer were randomly divided intoatreatmentgroup(TG)andacontrolgroup(CG).Patients with moderate pain were given 100 mg qd of a sustainably released tablet of tramadol hydrochloride;patientswithseverepainweregiven4.2mg q3d of the fentanyl transdermal system.The ashi points Ganshu(BL 18),Danshu(BL 19) and Qimen(LR 14) were chosen for the acupoint application intervention.CG patients were given a sham patch and TG patients were given a Dingqi analgesic patch.A visual analogue scale(VAS) was used before treatment and after 1,3,6,9 and 12 days of treatment.The Karnofsky score was measured before treatment and after 12 days of treatment.Any main adverse reactions(e.g.nausea,constipation,dizziness and headache) were recorded after 6 and 12 days of treatment.Any skin side effects(i.e.skin irritation and allergic reactions) were recorded.RESULTS:The VAS in TG was significantly lower than that in CG after 3,6,9 and 12 days of treatment(P<0.05).There was no significant difference in the Karnofsky score before treatment and after 12 days of treatment between CG and TG.There were also no significant differences in the main adverse reactions or skin side effects after 6 and 12 days of treatment between CG andTG(P>0.05).CONCLUSION:The Dingqi analgesic patch can enhance the analgesic effect of tramadol and fentanyl. | Changjun Wang Wei Tan Xuhui Huang Tingting Fu Juze Lin Junmin Bu Guojian Wei Yu Du | 2013 | Journal of Traditional Chinese Medicine2013，33，2： | 9 |
| 2 | Predictive Decision and Reliable Accessing for UAV Communication in Space-Air-Ground Integrated Networks显示文摘The cooperation of multiple Unmanned Aerial Vehicles(UAVs) has become a promising scenario in Space-Air-Ground Integrated Networks(SAGINs) recently due to their widespread applications,where wireless communication is a basic necessity and is normally categorized into control and nonpayload communication(CNPC) as well as payload communication. In this paper, we attempt to tackle two challenges of UAV communication respectively on establishing reliable CNPC links against the high mobility of UAVs as well as changeable communication conditions, and on offering dynamic resource optimization for Quality-of-Service(QoS) guaranteed payload communication with variable link connectivity. Firstly, we propose the concept of air controlling center(ACC), a virtual application equipped on the infrastructure in SAGINs, which can collect global information for estimating UAV trajectory and communication channels. We then introduce the knapsack problem for modelling resource optimization of UAV communication in order to provide optimal access points for both CNPC and payload communication. Meanwhile, using the air controlling information, predictive decision algorithm and handover strategy are introduced for the reliable connection with multiple access points. Simulation results demonstrate that our proposal ensures an approximate always-on reliable accessing of communication links and outperforms the existing methods against high mobility,sparse distribution, and physical obstacles. | Bowen Zeng Zhongshan Zhang Xuhui Ding Xiangyuan Bu Jianping An | 2022 | China Communications2022，19，1： | 1 |
| 3 | Event-triggered robust guaranteed cost control for two-dimensional nonlinear discrete-time systems显示文摘An event-triggered scheme is proposed to solve the problems of robust guaranteed cost control for a class of two-dimensional(2-D)discrete-time systems.Firstly,an eventtriggered scheme is proposed for 2-D discrete-time systems with parameter uncertainties and sector nonlinearities.Then,according to the Lyapunov functional method,the sufficient conditions for the existence of event-triggered robust guaranteed cost controller for 2-D discrete-time systems with parameter uncertainties and sector nonlinearities are given.Furthermore,based on the sufficient conditions and the linear matrix inequality(LMI)technique,the problem of designing event-triggered robust guaranteed cost controller is transformed into a feasible solution problem of LMI.Finally,a numerical example is given to demonstrate that,under the proposed event-triggered robust guaranteed cost control,the closed-loop system is asymptotically stable and fewer communication resources are occupied. | WANG Sen BU Xuhui LIANG Jiaqi | 2019 | Journal of Systems Engineering and Electronics2019，30，6： | 1 |
| 4 | Hoo control for network-based 2-D systems with missing measurements 显示文摘 | BU Xuhui WANG Hongqi ZHENG Zheng | 2014 | Abstract and Applied Analysis2014，2014，5： | 1 |
| 5 | A Novel Synchronization Method in Terahertz Large-Scale Antenna Array System显示文摘We focus on the problems of the accurate time delay estimation,the design of training pilots,and hybrid matrix optimization within the large-scale antenna array Terahertz(THz)broadband communication system.In contrast to the existing researches based on narrow-band arrays,we hereby shed light on the time delay estimation of broadband arrays.In THz broadband communication systems,the data symbol duration is relatively short when comparing with the dimension of the antenna array.In large-scale antenna systems,signals received in each antenna are no longer different phase-shifted copies of the same symbol,but completely different symbols in which occasion traditional narrowband structure is no longer suitable.Based on the above conclusion,firstly,we put forward a system model based on large-scale antenna arrays and Time delay line(TDL)structure.Secondly,we deduce the Cramer-Rao lower bound(CRLB)of the time delay estimation,and present a time delay estimation algorithm that could reach the CRLB.Thirdly,by minimizing the CRLB,we address the design of the training pilot and optimized TDL structure under the condition of constant envelope training pilot and modulus TDL structure.Finally,we disclose the numerical simulation results.According to the simulation results,the aforementioned method is workable in reaching the CRLB,the TDL structure can significantly surpass that of the traditional model,and the optimal pilot design method outperforms the pseudo-random pilot structure. | ZHENG Chen DING Xuhui LIU Dekang BU Xiangyuan AN Sining | 2021 | Chinese Journal of Electronics2021，30，5： | 0 |
| 6 | A Novel Angle of Arrival Tracking Method in Large-Scale-Array Systems显示文摘In this paper,we investigate the problem of angle of arrival(AOA)tracking for the largescale array in terahertz(THz)communication,which has a large size and a narrow beam,highly demanding an accurate angle estimation.On the one hand,the system usually adopts a hybrid structure with limited radio-frequency(RF)chains,which increases the difficulty of angle estimation;on the other hand,the rapid mobility of users also brings new challenges to angle estimation.To address the above challenges,a two-stage tracking framework is proposed in this paper,which employs the random phase matrix and orthogonal long pilots in the first stage to reduce the complicated multi-user estimation to multiple single-user estimations,followed by using both wide and narrow beams in the second stage to serve high-speed and low-speed users.Furthermore,a generalized-approximated-message-passing(GAMP)method is proposed for facilitating a low-accuracy estimation of the angles,followed by adopting a modified expectation-maximization(EM)algorithm based phase estimation to unbiased estimate the instantaneous angle with the help of high-gain characteristics of the beams.The proposed structure can not only simplify the estimation complexity,but also improve the estimation accuracy due to its capability of transferring the non-linear problem of angle observation into a linear gaussian model.In addition,the Kalman tracking framework is employed for performing a continuous angle tracking.Numerical results show that the angle estimation based on the random phase matrix in the initial stage can obtain a high enough estimation accuracy,while the GAMP algorithm implemented in the second stage can quickly capture the angle range under the Rayleigh limit.The performance of the proposed EM-based tracking method is shown to outperform the traditional extended Kalman filter(EKF)method. | Chen Zheng Dekang Liu Xuhui Ding Xiangyuan Bu Zhongshan Zhang | 2022 | China Communications2022，19，9： | 0 |
| 7 | Event-Triggered Asymmetric Bipartite Consensus Tracking for Nonlinear Multi-Agent Systems Based on Model-Free Adaptive Control显示文摘In this paper,an asymmetric bipartite consensus problem for the nonlinear multi-agent systems with cooperative and antagonistic interactions is studied under the event-triggered mechanism.For the agents described by a structurally balanced signed digraph,the asymmetric bipartite consensus objective is firstly defined,assigning the agents'output to different signs and module values.Considering with the completely unknown dynamics of the agents,a novel event-triggered model-free adaptive bipartite control protocol is designed based on the agents'triggered outputs and an equivalent compact form data model.By utilizing the Lyapunov analysis method,the threshold of the triggering condition is obtained.Subsequently,the asymptotic convergence of the tracking error is deduced and a sufficient condition is obtained based on the contraction mapping principle.Finally,the simulation example further demonstrates the effectiveness of the protocol. | Jiaqi Liang Xuhui Bu Lizhi Cui Zhongsheng Hou | 2023 | IEEE/CAA Journal of Automatica Sinica2023，10，3： | 0 |
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