普通高校高水平运动队学分制实施现状及对策   总被引：5，自引：0，他引：5  

上官戎  易小坚  孙洪涛 《体育学刊》2006,13(5):73-75

在调查分析多所普通高校高水平运动队的学分制实施的基础上,探讨了专业文化学习与运动训练独立的和专业文化学习与运动训练相结合的两种学分制实施的特点,找出影响我国普通高校高水平运动队学分制实施的因素,最终提出:完善学分制管理体制,形成良性运行机制;根据需要,适度放宽学分制标准;拓宽思路,宽进严出,保证招生质量等发展对策。  相似文献   

中美大学高等教育评估体系比较   总被引：1，自引：0，他引：1  

赵树勤  刘志敏 《湘南学院学报》2011,32(1):90-93

中美高等教育评估体系存在着评估机构不同、评估标准不同、评估程序不同等差异.美国高等教育评估体系对我国相应体系的建立健全有着重要启示作用.我国可从评估信息系统的建立、评估中介机构的建立及其服务意识的确立,和评估主体正确认识评估目的等多个方面改进和完善高等教育评估体系.  相似文献   

论国际法效力基础的构成     

银红武 《衡阳师范学院学报》2011,32(2):49-52

对于国际法效力基础问题的探究,国际法学者们作出了几个世纪的不懈努力。问题研究的复杂性导致了不同学者们的不同结论。应本着全局、科学和现实的态度,来审视国际法的效力基础,不能生硬地割裂国际法效力基础的各构成要素之间的联系。国际法的效力基础应由国际法的程序效力基础、实质效力基础和现实效力基础三部分构成。  相似文献   

Incentive feedback Stackelberg strategy for stochastic systems with state-dependent noise     

《Journal of The Franklin Institute》2022,359(5):2058-2072

This paper designs an incentive strategy for a class of stochastic Stackelberg games in finite horizon and infinite horizon, respectively. The obtained incentive Stackelberg strategy works well in the sense that the leader will get his desired solution in the end. Different from the existing works, the state-dependent noise is considered in the design of the incentive Stackelberg strategy. Moreover, the mean-square stabilization can be guaranteed by the follower. The algorithm procedure is put forward to obtain effectively the incentive feedback Stackelberg strategy in infinite horizon. Finally, two examples are given to shed light on the effectiveness of the proposed algorithm procedure.  相似文献   

Franklin Institute Awards Call for Nominations – 2023 Bower Science Award     

《Journal of The Franklin Institute》2022,359(4):v

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Adaptive output feedback control of large-scale nonlinear time-delay systems with uncertain output equations     

《Journal of The Franklin Institute》2022,359(5):1795-1820

For a class of large-scale nonlinear time-delay systems with uncertain output equations, the problem of global state asymptotic regulation is addressed by output feedback. The class of systems under consideration are subject to feedforward growth conditions with unknown growth rate and time delays in inputs and outputs. To deal with the system uncertainties and the unknown delays, a novel low-gain observer with adaptive gain is firstly proposed; next, an adaptive output feedback delay-free controller is constructed by combining Lyapunov-Krasovskii functional with backstepping algorithm. Compared with the existing results, the controllers proposed are capable of handling both the uncertain output functions and the unknown time delays in inputs and outputs. With the help of dynamic scaling technique, it is shown that the closed-loop states converge asymptotically to zero, while the adaptive gain is bounded globally. Finally, the effectiveness of our control schemes are illustrated by three examples.  相似文献   

Periodic sampled-data-based dynamic model control of switched linear systems     

《Journal of The Franklin Institute》2022,359(16):8539-8552

Sampled-data control as an effective mean of digital control has shown its prominent superiority in most practical industries and a zero-order holder (ZOH) is often introduced to maintain continuity of control in the field of sampled-data control system. However, it decreases the control accuracy in a certain extent since the state will be held invariably within each sampling interval. In order to improve the control accuracy, this paper proposes a dynamic model-based control strategy instead of ZOH for a class of switched sampled-data control systems. The model, which is built by abstracting the plant knowledge, is located at the controller side. The controller is set up based on the model state and it provides control input to the switched system. A fixed sampling period is adopted, under which a hybrid-dwell time switching condition is revealed by taking into account asynchronous switching. With reasonable design of switching condition, exponential stability of the closed-loop system can be guaranteed. Finally, advantages of our proposed method are presented through a numerical example by comparing with the result of ZOH-based control.  相似文献   

Stabilizing unstable periodic orbits in large stability domains with dynamic time-delayed feedback control     

《Journal of The Franklin Institute》2022,359(16):8484-8496

Dynamic time-delayed feedback control (DDFC) is applied to stabilize the unstable periodic orbits (UPOs) of chaotic systems in large stability domains. The stability domain is defined as certain areas of the parameter space of the feedback strength, in which the UPOs are stabilized. The control effect of the DDFC with a second-order controller system is investigated by considering two control objectives: to broaden the stability domain of the controlled UPOs and to minimize the modulus of the largest Floquet multiplier, which leads to a multi-objective optimization problem (MOP). The MOP is solved with the genetic algorithm. Case studies indicate that the control effect of the DDFC is significantly better than that of original time-delayed feedback control. The DDFC can stabilize the UPOs in a large stability domain and with a small modulus of the largest Floquet multiplier when the adjustable parameters of the controller system are properly designed.  相似文献   

Stability analysis for a class of switched systems with state constraints via time-varying Lyapunov functions     

《Journal of The Franklin Institute》2022,359(16):8933-8949

This article investigates the stability analysis for a class of continuous-time switched systems with state constraints under pre-specified dwell time switchings. The state variables of the studied system are constrained to a unit closed hypercube. Firstly, based on the definition of set coverage, the system state under saturation is confined to a convex polyhedron and the saturation problem is converted into convex hull. Then, sufficient conditions are derived by introducing a class of multiple time-varying Lyapunov functions in the framework of pre-specified dwell time switchings. Such a dwell time is an arbitrary pre-specified constant which is independent of any other parameters. In addition, the proposed Lyapunov functions can efficiently eliminate the “jump” phenomena of adjacent Lyapunov functions at switching instants. The feature of this paper is that the definition of set coverage is utilized to replace the restriction on the row diagonally dominant matrices with negative diagonal elements to analyze stability. The other feature of the constructed time-varying Lyapunov functions is that there are two time-varying functions. One of the two time-varying functions contains the jump rate, which will present a certain degree of freedom in designing the dwell time switching signal. An iterative linear matrix inequality (LMI) algorithm is presented to verify the sufficient conditions. Finally, two examples are presented to show the validity of the method.  相似文献   

Robust input/output model matching of asynchronous sequential machines under intermittent actuator faults     

《Journal of The Franklin Institute》2022,359(16):8950-8973

A robust model matching control scheme for input/output asynchronous sequential machines (ASMs) with intermittent actuator faults is presented in the framework of corrective control. In our problem setting, certain actuator outputs are not transmitted to the machine temporarily owing to random faults. We first present a state observer that predicts the current stable state of the machine based on the output burst and control input, as well as diagnoses actuator faults. We then address the existence condition and design procedure for an output-feedback corrective controller that matches the input/output behavior of the closed-loop system to that of a reference model against intermittent loss of actuator outputs. To demonstrate the applicability of the proposed control method, we implement a practical asynchronous digital system with the developed corrective controller on the field-programmable gate array (FPGA) circuit. Experimental verifications using the FPGA circuit are also provided.  相似文献