科技学术期刊作者贡献声明著录现状分析_^*     

徐文华  王景周 《科技管理研究》2019,(12)

学术论文的各种署名失范行为严重影响文献计量和学术评价的客观性和公正性,作者贡献声明对规范作者署名具有重要的约束作用。首先,以中国科学引文数据库(CSCD)2017—2018版来源期刊为研究对象,考察我国科技学术期刊的作者贡献声明著录现状,发现：1229种期刊中仅有2.6%(32/1028)的期刊注有作者贡献声明,其中中文语种期刊0.19%(2/1028),英文语种期刊14.93%(30/201)。其次,分析作者贡献声明在我国科技学术期刊中没有得到普及的原因及著录中存在的问题。最后,提出一些建议和措施,为规范作者署名、真实体现作者贡献、推动科技合作和学术评价提供参考。  相似文献   

Fault-tolerant control for commercial aircraft with actuator faults and constraints     

Yishi Liu  Xiwang Dong  Zhang Ren  Jonathan Cooper 《Journal of The Franklin Institute》2019,356(7):3849-3868

In this paper, a constrained control scheme based on model reference adaptive control is investigated for the longitudinal motion of a commercial aircraft with actuator faults and saturation nonlinearities. Actuator faults and constraints are both important factors adversely affecting the stability and performance of flight control systems. An adaptive adjustment law based on Lyapunov function is utilized to adjust the fault-tolerant control law. Both additive and multiplicative faults are considered in the designed controller to deal with the three types of actuator faults: locked in place, loss of effectiveness, and bias. Moreover, different techniques are implemented in the basic and fault-tolerant controller to anti-windup. Proofs for the stability of the two modified controllers which improve the performance of control system operating in the presence of actuator faults and saturations are proposed. Finally, a numerical example of the anti-windup fault-tolerant controller for a commercial aircraft is demonstrated. The stability and performance improvements can be accrued with the presented fault-tolerant control scheme.  相似文献   

Necessary conditions of exponential stability for a class of linear uncertain systems with a single constant delay     

Xian Zhang  Xinxiao Liu  Yantao Wang  Xin Wang 《Journal of The Franklin Institute》2019,356(7):4043-4060

In this paper, we will investigate the necessary conditions, described by the Lyapunov matrix, for the robust exponential stability for a class of linear uncertain systems with a single constant delay and time-invariant parametric uncertainties, which are some generalizations of the existing results on uncertain linear time-delay systems. As a medium step, several pivotal properties of parameter-dependent Lyapunov matrix are proposed, which set up the relationships between fundamental matrix and Lyapunov matrix for the considered system. In addition, to calculate the parameter-dependent Lyapunov matrix, we introduce the differential equation method and the Lagrange interpolation method, respectively. Furthermore, it is noted that the proposed necessary conditions can be used to estimate the range of time delay, when the linear uncertain time-delay system is robust exponential stability. Finally, the validity of the obtained theoretical results is illustrated via numerical examples.  相似文献   

Output feedback robust H∞ control for spacecraft rendezvous system subject to input saturation: A gain scheduled approach     

Yi Huang  Yingmin Jia 《Journal of The Franklin Institute》2019,356(7):3899-3921

In this paper, the problem of output feedback robust H_∞ control for spacecraft rendezvous system with parameter uncertainties, disturbances and input saturation is investigated. Firstly, a full-order state observer is designed to reconstruct the full state information, whose gain matrix can be obtained by solving the linear matrix inequality (LMI). Subsequently, by combining the parametric Riccati equation approach and gain scheduled technique, an observer-based robust output feedback gain scheduled control scheme is proposed, which can make full use of the limited control capacity and improve the control performance by scheduling the control gain parameter increasingly. Rigorous stability analyses are shown that the designed discrete gain scheduled controller has faster convergence performance and better robustness than static gain controller. Finally, the performance and advantage of the proposed gain scheduled control scheme are demonstrated by numerical simulation.  相似文献   

Robust bounds for fractional-order systems with uncertain order and structured perturbations via Cylindrical Algebraic Decomposition method     

Jing Yang  Xiaorong Hou 《Journal of The Franklin Institute》2019,356(7):4097-4105

This paper considers the robust stability problem of fractional-order systems with uncertain order and structured perturbations. A stability check procedure is proposed for determining the robust bounds of uncertain order and other uncertain parameters for fractional-order systems.The results are obtained in terms of Cylindrical Algebraic Decomposition which is first used for analyzing the robust stability problem of fractional-order systems with uncertain order. The method is non-conservative for fractional-order systems with the uncertain order α satisfying 0?<?α?<?2. Examples are given to demonstrate the effectiveness of proposed approach.  相似文献   

Erratum to “Analysis and Experimental Investigation into a Finite Time Current Observer Based Adaptive Backstepping Control of Buck Converters”     

Tousif Khan Nizami  Arghya Chakravarty  Chitralekha Mahanta 《Journal of The Franklin Institute》2019,356(7):4190

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Optimal control & dynamical aspects of a stochastic pine wilt disease model     

Ravi P. Agarwal  Qaisar Badshah  Ghaus ur Rahman  Saeed Islam 《Journal of The Franklin Institute》2019,356(7):3991-4025

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Quantized control of event-triggered networked systems with time-varying delays     

Min Sun  Ling Huang  Shen Wang  Cui Mao  Wenbo Xie 《Journal of The Franklin Institute》2019,356(17):10368-10392

The paper is a study of quantized control for stochastic Markov jump systems with interval time-varying delays and bounded system noise under event-triggered mechanism. A new scheme of Lyapunov–Krasovskii functional which contains the quadratic terms and integral terms is presented. Then quadratic convex technology, the theory of stochastic switching system, and logarithmic quantizer are applied to this paper. The design of quantized controller is obtained with those methodologies. Different from previous results, our derivation applies the idea of second-order convex combination. The conservatism of stability criteria for systems is reduced by using this method. A numerical example under different conditions is given to demonstrate the effectiveness and validity of the new design techniques.  相似文献   

Distributed event-triggered control co-design for large-scale systems via static output feedback     

Ting Shi  Tingting Tang  Jianjun Bai 《Journal of The Franklin Institute》2019,356(17):10393-10404

This work investigates the problem of distributed control for large-scale systems, in which a communication network is available to exchange information. To avoid the unnecessary communication, an event-triggered control (ETC) mechanism is introduced, in which the transmission occurs only when a certain event is triggered. Under the assumption that only the output signal is available, the static output feedback (SOF) is considered in this work. The aim of the co-design is to design an SOF controller and an ETC condition simultaneously such that the overall closed-loop system is stabilized with a certain level of performance. To this end, an event-triggering scheme based on output signals is proposed to determine when the event is triggered. Then the closed-loop system is modeled as a linear perturbed system. The distributed control co-design is formulated as a convex optimization problem with linear matrix inequalities (LMIs) constraints. Finally, a numerical example is presented to show the effectiveness of the proposed design method.  相似文献   

Steady-state analysis of probabilistic Boolean networks     

Jinfeng Pan  Jun-e Feng  Min Meng 《Journal of The Franklin Institute》2019,356(5):2994-3009

This paper investigates steady-state distributions of probabilistic Boolean networks via cascading aggregation. Under this approach, the problem is converted to computing least square solutions to several corresponding equations. Two necessary and sufficient conditions for the existence of the steady-state distributions for probabilistic Boolean networks are given firstly. Secondly, an algorithm for finding the steady-state distributions of probabilistic probabilistic Boolean networks is given. Finally, a numerical example is given to show the effectiveness of the proposed method.  相似文献