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Capacity Evaluation Model of Enterprise Technological Innovation Complex System and Its Application
Ke-Bin Lu,Jun-Jie Huang,Qiang Wang 보안공학연구지원센터 2016 International Journal of Multimedia and Ubiquitous Vol.11 No.4
Under the background of complex system of enterprise innovation, based on the self-organization theory and collaborative theory, it is thought that the enterprise technology innovation system belongs to the grey system, for this reason, build the grey relational analysis model of the enterprise technology innovation system capability evaluation, and use weight coefficient method to optimize. Finally, use the optimization model to evaluate the technological innovative ability of seven enterprises; the results show that the built enterprise technology innovation system ability evaluation model is effective, and it can offer the innovation ability value of different enterprises accurately, providing the useful decision-making reference for the enterprise technology innovation system and the optimization of technological innovation cooperative system.
An Optimal Robust Trajectory Tracking Control Strategy for the Wheeled Mobile Robot
Bin Chai,Ke Zhang,Minghu Tan,Jingyu Wang 제어·로봇·시스템학회 2024 International Journal of Control, Automation, and Vol.22 No.3
A new optimal robust control strategy is designed based on the modified backstepping method in thispaper. Using this strategy, stable, accurate and real-time trajectory tracking for the wheeled mobile robot in thepresence of unavoidable disturbances is achieved. The control strategy consists of a kinematic controller, a dynamical controller and an online optimization algorithm. The kinematic controller, which considers non-holonomicconstraint and the resulting under-actuated nature, has fewer gains and reduces the computational burden. The dynamical controller introduces a saturation function for error compensation and effectively suppresses disturbances. The optimization algorithm is used to achieve online tuning of controllers, thus achieving fast and accurate convergence of the trajectory tracking error. The stability of the control strategy is proved theoretically. Various numericalsimulation scenarios with different types of disturbances and the experiment test verify the superiority of the trajectory tracking effect.
Ke Zhang,Vincent Cocquempot,Bin Jiang 제어·로봇·시스템학회 2017 International Journal of Control, Automation, and Vol.15 No.3
This paper addresses an adjustable parameter (AP)-based multi-objective fault estimation design forcontinuous-time/discrete-time dynamic systems. First, a fault estimation observer with AP is constructed to on-lineidentify the size of occurred faults. The fault estimation design not only possesses a wider application comparedwith adaptive observers, but also uses the current output information to enhance fault estimation performance. Then a multi-objective approach is proposed to determine the gain matrices of fault estimation observer. Moreover,fault estimation results with the slack-variable technique are obtained to further reduce the conservatism. Finally,simulation results of an aircraft application are presented to illustrate the effectiveness of our contribution.
Adaptive Observer-based Fast Fault Estimation
Ke Zhang,Bin Jiang,Vincent Cocquempot 제어로봇시스템학회 2008 International Journal of Control, Automation, and Vol.6 No.3
This paper studies the problem of fault estimation using adaptive fault diagnosis observer. A fast adaptive fault estimation (FAFE) approximator is proposed to improve the rapidity of fault estimation. Then based on linear matrix inequality (LMI) technique, a feasible algorithm is explored to solve the designed parameters. Furthermore, an extension to sensor fault case is investigated. Finally, simulation results are presented to illustrate the efficiency of the proposed FAFE methodology.
Novel Three-Phase PWM Voltage-Fed Rectifier with an Auxiliary Resonant Commutated Pole Link
Ke-Qing Qu,Jin-Bin Zhao 전력전자학회 2014 JOURNAL OF POWER ELECTRONICS Vol.14 No.4
A novel auxiliary resonant commutated pole (ARCP) link for three-phase PWM voltage-fed converter is presented. The ARCP link consists of two auxiliary switches, one resonant inductance, and six diodes, which is simpler than the conventional ARCP designs. Based on the phase and amplitude control, the proposed converter can take a minimum switching times PWM method, which results in reduced losses and a simplified control. In addition, the zero-voltage resonance modes are analyzed. Finally, simulation and experimental results show that the system can realize zero-voltage switching with a unity power factor.
A Novel Hysteresis Control Strategy Based on Ampere-Second Balance of the Modulate Capacitor
Jin-Bin Zhao,Jian-Feng Dai,Ke-Qing Qu,Fen Li 전력전자학회 2014 JOURNAL OF POWER ELECTRONICS Vol.14 No.6
A novel hysteresis PWM control strategy for synchronous buck converter is proposed. The proposed control strategy is based on ampere-second balance of the modulate capacitor, which not only offers faster transient response to meet the challenges of the power supply requirements of fast dynamic load changes, but also provides better stability and solves the compensation problem of error amplifier in the conversional voltage PWM control. Finally, the steady-state and dynamic operation of the control method is analyzed and verified by simulation and experimental results.
Ding, Ke,Kim, Jong Kyu,Lu, Qiang,Du, Bin Hindawi Limited 2017 Discrete dynamics in nature and society Vol.2017 No.-
<P>This paper deals with designing a new iteration scheme associated with a given scheme for contraction mappings. This new scheme has a similar structure to that of the given scheme, in which those two iterative schemes converge to the same fixed point of the given contraction mapping. The positive influence of feedback parameters on the convergence rate of this new scheme is investigated. Moreover, the derived convergence and comparison results can be extended to nonexpansive mappings. As an application, the derived results are utilized to study the synchronization of logistic maps. Two illustrated examples are used to reveal the effectiveness of our results.</P>
Two New Diphenylethylenes from Arundina graminifolia and Their Cytotoxicity
Yin-Ke Li,Bin Zhou,Yan-Qing Ye,Gang Du,De-Yun Niu,Chun-Yang Meng,Xue-Mei Gao,Qiu-Fen Hu 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.11
Two new diphenylethylenes, gramniphenols H and I (1 and 2), together with six known diphenylethylenes (3- 8), were isolated from Arundina graminifolia. The structures of 1-8 were elucidated by spectroscopic methods including extensive 1D- and 2D-NMR techniques. Compounds 1 and 2 were evaluated for their cytotoxicity against five human tumor cell lines. Compound 1 showed cytotoxicity against PC3 cells with IC50 value of 3.5 μM. Compound 2 showed cytotoxicity against NB4 and PC3 cells with IC50 values of 3.6 and 3.8 μM, respectively.
Novel Three-Phase PWM Voltage-Fed Rectifier with an Auxiliary Resonant Commutated Pole Link
Qu, Ke-Qing,Zhao, Jin-Bin The Korean Institute of Power Electronics 2014 JOURNAL OF POWER ELECTRONICS Vol.14 No.4
A novel auxiliary resonant commutated pole (ARCP) link for three-phase PWM voltage-fed converter is presented. The ARCP link consists of two auxiliary switches, one resonant inductance, and six diodes, which is simpler than the conventional ARCP designs. Based on the phase and amplitude control, the proposed converter can take a minimum switching times PWM method, which results in reduced losses and a simplified control. In addition, the zero-voltage resonance modes are analyzed. Finally, simulation and experimental results show that the system can realize zero-voltage switching with a unity power factor.
High-j Proton h11/2 and g7/2 Intruder Bands in 113In
Ma Ke Yan,Lu Jing Bin,Ma Ying Jun,Li Jian,Yang Dong,Sun Wu Ji,Wang Hao,Pan Hao Nan,Wang Jia Qi,Yang Qing Yu,Zhang Da Ming,Zhu Li Hua,Wu Xiao Guang,Zheng Yun,Li Cong Bo 한국물리학회 2020 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.76 No.12
Excited states of 113In have been populated through the heavy-ion fusion evaporation reaction 110Pd(7Li, 4n)113In. A new band with the configuration of a proton d5/2 orbital is identified. Two ΔI = 2 intruder bands, built on the πh11/2 and the πg7/2 orbitals, have been extended to spins (63/2-)ħ and (55/2+)ħ, respectively. The negative-parity πh11/2 intruder band shows a smooth increase in aligned spin, which is attributed to a strong proton-neutron interaction. The properties of the positive-parity πg7/2 band are discussed based on tilted axis cranking model calculations, and the features of the antimagnetic rotation for this band are shown after backbend. Furthermore, the contributions of the two-shears-like mechanism, the neutron (gd)ν shell and the core rotation are investigated for the positive-parity πg7/2 band.