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| 1 | Modeling and stabilization for a class of nonlinear networked control systems: A T-S fuzzy approach显示文摘The stabilization problem for a class of nonlinear networked control systems (NCSs) is investigated in this paper. A Takagi-Sugeno (T-S) fuzzy model is employed to represent the nonlinear controlled plant in the NCSs. Based on parallel distributed compensation (PDC) technique, a novel model of the nonlinear NCSs is established firstly in consideration of both network-induced delay and packet losses in transmission. Then a stability condition of the nonlinear NCSs is presented in terms of linear matrix inequalities (LMIs) by using the Lyapunov-Krasovskii functional method and the delay input approach. Furthermore, the control design of the nonlinear NCSs is developed by means of LMIs. Finally, a numerical example is given to demonstrate the effectiveness of the proposed method. | Xinchun Jia Dawei Zhang Lihong Zheng Nanning Zheng | 2008 | Progress in Natural Science:Materials International2008，18，8： | 14 |
| 2 | Effect of the Cutter Parameters and Machining Parameters on the Interference in Gear Slicing显示文摘Current researches have not yet found the effect law of the cutter parameters and machining parameters on the interference in gear slicing,the interference between the cutter and machined gear often happens because the appropriate cutter parameters and machining parameters cannot be set,which reduces the gear machining accuracy.The relative position between the major flank face and edge-sweeping surface,distribution law of the interference area in forming process of edge-sweeping surface,and effect law of relative positions among edge-sweeping surfaces on the interference are studied by graphical analysis.The effect law of the cutter parameters and machining parameters on the interference is found.The effect law shows that the interference in gear slicing can be controlled when the relief angle measured on the top edge and feed of every rotation are chosen respectively larger than 9°and smaller than 0.15 mm/r.An internal helical gear is sliced with the spur slice cutter and the cutter parameters and machining parameters are set based on above the effect law.The machined gear is measured in Gear Measuring Center and the detection result shows that the comprehensive accuracy reaches GB/T Class 7,where some reach GB/T Class 6.The result can meet the gear machining accuracy requirement and shows that the effect law found is valid.The problem of the interference in gear slicing is solved and the gear machining accuracy can be improved. | CHEN Xinchun LI Jia LOU Benchao SHI Jiang YANG Qijun | 2013 | Chinese Journal of Mechanical Engineering2013，26，6： | 10 |
| 3 | Reliable grading robust stabilization for uncertain time-varying systems via dynamic compensator显示文摘A new general model for uncertain time-varying parameters and a new measure sensor failure model are presented, and the problems of both grading robust stabilization and reliable grading robust stabilization for such systems are studied. By the Lyapunov stability theory and matrix algebra method, some sufficient criteria for the above two control problems are established in quasi-linear matrix inequalities (Q-LMIS) forms. In view of linear matrix inequality (LMI) approach, a solving procedure for the Q-LMIS problem is proposed. The solvability of the Q-LMIS problem can be improved obviously by adding some LMI constraints to the Q-LMIS. Based on the two Q-LMIS criteria, a grading robust stable control strategy, namely, the controller with different energy is acted on the system with different uncertain parameter range, is presented. The numerical simulating results show that the grading robust stable control strategy for the robust stabilization of uncertain systems has important theoretical and practical significance. | JIA Xinchun and ZHENG Nanning(Institute of Artificial Intelligence and Robotics, Xi’an Jiaotong University, Xi’an 710049, China) | 2002 | Progress in Natural Science:Materials International2002，12，10： | 7 |
| 4 | Fuzzy H∞ tracking control for non- linear networked control systems in T-S fuzzy model显示文摘 | JIA Xinchun ZHANG Dawei HAO Xinghua ZHENG Nanning | 2009 | IEEE Transactions on Systems Man and Cybernetics-Part B: Cybernetics2009，39，4： | 1 |
| 5 | Mobile node aware opportunistic routing in dynamic wireless sensor network显示文摘Opportunistic routing(OR) could adapt to dynamic wireless sensor networks(WSNs) because of its inherent broadcast nature.Most of the existing OR protocols focus on the variations of propagation environment which are caused by channel fading.However, a few works deal with the dynamic scenario with mobile nodes.In this paper, a mobile node(MN) aware OR(MN-OR) is proposed and applied to a WSN in the high-speed railway scenario where the destination node is deployed inside a high speed moving train, and the MN-OR not only considers the mobility of node but also utilizes the candidate waiting time induced by the timer-based coordination scheme.Specifically, to reduce the number of duplicate transmissions and mitigate the delay of information transmission, a new selection strategy of the candidate forwarders is presented.In addition, two priority assignment methods of the candidate forwarders are proposed for the general relay nodes(GRNs) and the rail-side nodes(RSNs) according to their different routing requirements.Extensive simulation results demonstrate that the proposed MN-OR protocol can achieve better network performances compared with some existing routing schemes such as the well-known Ad-hoc on-demand distance vector routing(AODV) and the extremely opportunistic routing(ExOR) protocols. | Lü Xiaojun Jia Xinchun Han Zongyuan Yang Bo Hao Jun | 2016 | The Journal of China Universities of Posts and Telecommunications2016，23，5： | 1 |
| 6 | Apolipoprotein E polymorphism in northern Chinese elderly patients with coronary artery disease显示文摘Background and objective Apolipoprotein E is a constituent of lipoproteins with considerable variation due to cysteine-arginine exchanges. We investigated the relationship between apo E gene polymorphism and the occurrence of coronary artery disease(CAD) in the older population of northern China. Methods The distribution of the HhaI polymorphisms of the apolipoprotein E gene was determined among 55 patients with CAD (CAD group), which was compared with that of 36 elderly subjects without CAD(control group). Results Genotype distributions at both sites (apo E gene 112-bp and 158-bp sites ) were different between the CAD and control groups. The CAD group had lower apolipoprotein E'ε2'frequencies than the control group (P<0.05). Conclusion Individuals with apolipoprotein E'ε2'are likely to have a reduced risk of developing coronary artery disease as demonstrated by elderly subjects in Northern China. | Yangchun ZOU Dayi HU Xiufang HONG Xingyuan JIA Xinchun YANG Liang CUI | 2006 | Journal of Geriatric Cardiology2006，3，2： | 1 |
| 7 | A study on the design of error-free spur slice cutter显示文摘 | CHEN Xinchun LI Jia LOU Benchao | 2013 | The International Journal of Advanced Manufacturing Technology2013，68，1： | 1 |
| 8 | Research of the synchronous motion control for the gear slicing CNC machine tool based on SIEMENS 840D显示文摘 | CHEN Xinchun LI Jia LOU Benchao | 2012 | Advanced Science Letters2012，5，1： | 1 |
| 9 | A Study on the Design of Error-free Spur Slice Cutter显示文摘 | Chen Xinchun Li Jia Lou Benchao | 2013 | Interna- tional Journal of Advanced Manufacturing Technol- ogy2013，68，14： | 1 |
| 10 | Fuzzy tracking control for nonlinear networked control systems in T - S fuzzy model 显示文摘 | Jia Xinchun Zhang Dawei Hao Xinghua | 2009 | 1EEE Trans Syst Man Cybern2009，39，5： | 1 |
| 11 | A study on the design of error-free spur slice cutter 显示文摘 | CHEN Xinchun LI Jia LOU Benchao | 2013 | Int J Adv Manuf Technol2013，68，： | 1 |
| 12 | Fuzzy tracking control for nonlinear networked control systems in T-S fuzzy model显示文摘 | JIA Xinchun ZHANG Dawei HAO Xinghua ZHENG Nanning | 2009 | IEEE Transactions on Systems Man and Cybernetics Part B:Cybernetics2009，39，4： | 1 |
| 13 | A study on the design of error-free spur slice cutter显示文摘 | CHEN Xinchun LI Jia LOU Benchao | 2013 | International Journal of Advanced Manufacturing Technology2013，68，14： | 1 |
| 14 | Structured Controller Design for Interconnected Systems via Nonlinear Programming显示文摘Dear Editor,This letter deals with the structural controller design problem of interconnected systems with unknown feedback topology.Firstly,under a cardinality constraint on the directed communication links among sub-controllers,a distributed controller’s feedback gain and feedback topology are incorporated in a unified co-design framework.Secondly,the cardinality constraint introduced in the distributed control is represented by a binary integer programming.To deal with the complementary constraint,a nonlinear programming(NLP)is proposed to relax the binary integer programming.Finally,incorporating the NLP into the standard distributed event-triggered control method,an algorithm is developed for interconnected systems to simultaneously design the feedback topology and controller gain.An interconnected system is composed of several coupling subsystems,which usually coordinate with each other to accomplish a common task. | Yanpeng Guan Junpeng Du Xinchun Jia | 2022 | IEEE/CAA Journal of Automatica Sinica2022，9，7： | 0 |
| 15 | Delay-dependent H-infinity control for continuous time-delay systems via state feedback显示文摘The delay-dependent H-infinity analysis and H-infinity control problems for continuous time-delay sys- tems are studied. By introducing an equality with some free weighting matrices, an improved criterion of delay-dependent stability with H-infinity performance for such systems is presented, and a criterion of existence and some design methods of delay-dependent H-infinity controller for such systems are proposed in term of a set of matrix inequalities, which is solved efficiently by an iterative algorithm. Further, the corresponding results for the delay-dependent robust H-infinity analy- sis and robust H-infinity control problems for continuous time-delay uncertain systems are given. Finally, two numerical examples are given to illustrate the efficiency of the proposed method by comparing with the other existing results. | Xinchun JIA Yibo GAO Jingmei ZHANG Nanning ZHENG | 2007 | 控制理论与应用(英文版)2007，5，3： | 0 |
| 16 | Thermosphere joint observations by TM-1 constellations and Swarm-B during the April 2023 geomagnetic storm显示文摘The response of thermosphere density to geomagnetic storms is a complicated physical process.Multi-satellite joint observations at the same altitude but different local times(LTs)are important for understanding this process;however,until now such studies have hardly been done.In this report,we analyze in detail the thermosphere mass density response at 510 km during the April 23−24,2023 geomagnetic storm using data derived from the TM-1(TianMu-1)satellite constellation and Swarm-B satellites.The observations show that there were significant LT differences in the hemispheric asymmetry of the thermosphere mass density during the geomagnetic storm.Densities observed by satellite TM02 at nearly 11.3 and 23.3 LTs were larger in the northern hemisphere than in the southern.The TM04 dayside density observations appear to be almost symmetrical with respect to the equator,though southern hemisphere densities on the nightside were higher.Swarm-B data exhibit near-symmetry between the hemispheres.In addition,the mass density ratio results show that TM04 nightside observations,TM02 data,and Swarm-B data all clearly show stronger effects in the southern hemisphere,except for TM04 on the dayside,which suggest hemispheric near-symmetry.The South-North density enhancement differences in TM02 and TM04 on dayside can reach 130%,and Swarm-B data even achieve 180%difference.From the observations of all three satellites,large-scale traveling atmospheric disturbances(TADs)first appear at high latitudes and propagate to low latitudes,thereby disturbing the atmosphere above the equator and even into the opposite hemisphere.NRLMSISE00 model simulations were also performed on this geomagnetic storm.TADs are absent in the NRLMSISE00 simulations.The satellite data suggest that NRLMSISE00 significantly underestimates the magnitude of the density response of the thermosphere during geomagnetic storms,especially at high latitudes in both hemispheres.Therefore,use of the density simulation of NRLMSISE00 may lead to large errors in satellite drag calculations and orbit predictions.We suggest that the high temporal and spatial resolution of direct density observations by the TM-1 constellation satellites can provide an autonomous and reliable basis for correction and improvement of atmospheric models. | YongPing Li YueQiang Sun XianGuo Zhang JiangZhao Ai XiaoLiang Zheng Jia Li YuJie Wang BiBo Guo Feng Yan ShiLong Wei XinChun Tang YuanYuan Cao | 2024 | Earth and Planetary Physics2024，8，2： | 0 |
| 17 | Investigation of Glass Formability in Al-Co-Y Ternary System显示文摘玻璃形成在融化旋转被调查由微观结构进化的 Al 富有的 Al-Co-Y 合金。有 230 亩 m 的厚度的以前的 Al88Co5Y7 被发现的最好的玻璃,和它形成能力(GFA ) 的玻璃比以前报导的 Al88Co4Y8 合金的高。这结果显示 GFA 对在系统的合金作文强烈敏感。阶段选择方法是定位最佳玻璃形成作文而非 T_ 和三角洲 T_x 参数(rg ) 的一个有效方法。 | Pan DONG Jia ZHANG Wanliang HOU Xinchun CHANG Jianqiang WANG Mingxiu QUAN | 2008 | Journal of Materials Science & Technology2008，24，2： | 0 |
| 18 | A new stabilizing method for linear aperiodic sampled-data systems with time delay inputs and uncertainties显示文摘Dear editor,With the rapid development of communication,control,and computer technologies,networked control systems(NCSs)have been widely used in various fields owing to its advantages of sharing information resources,reducing system wiring,and increasing the flexibility and reliability of systems[1–3].In NCSs,sampling-data systems commonly have aperiodic sampling characteristics owing to package dropouts,time triggering,network environment effects,among other issues[4].Therefore,aperiodic sampled-data systems have been widely studied[5,6].An interesting idea on aperiodic sampled-data systems was proposed in[5],which proved that delays can impose a positive effect on the stability of some NCSs.The problem of robust stabilization of aperiodic uncertain sampled-data linear systems was addressed in[6],and synthesis conditions in forms of parameter-dependent linear matrix inequalities were proposed.However,in these studies,only the cases with time delays or uncertainties were considered[5–7],which cannot fully satisfy the actual requirements of controlled systems(e.g.,aperiodic sampling,time delays,and uncertainties being present simultaneously in vehicle systems[8]and secure cooperative systems[9]). | Shuangshuang GAO Xiu YOU Xinchun JIA Weiwei MA | 2020 | Science China(Information Sciences)2020，63，4： | 0 |
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