“机械制造专业英语”教学方法探索与思考     

张文辉  褚福永  马静 《丽水学院学报》2013,(2):61-64

机械设计制造及其自动化专业是所有综合性大学都开设的本科专业。对"机械制造专业英语"这门课程近些年来的教学经验进行了总结。针对不同层次学业基础水平的学生如何达到较好的教学效果方面进行了有益的探索与思考。从教材的选择、讲义的编写、课件PPT的制作、教学方法的体会和经验、学习积极性和兴趣的提高等5个方面来总结和归纳"机械制造专业英语"的教学方法和感悟,针对不同的专业方向的学生如何更好地学以致用方面进行了对策性研究。  相似文献   

工科线性代数的教改与创新     

武慧虹  令狐荣涛 《安顺师范高等专科学校学报》2013,(5):123-126

传统的线性代数教学内容偏重理论、教学手段滞后,阻碍了工科学生对线性代数知识的掌握和应用。文章基于数学建模思想引出概念教学法并借助计算机Matlab软件,对教学内容的设计和教学手段进行改革和创新,激发工科学生学习线性代数的兴趣,提高其理论联系实际和实践动手能力。  相似文献   

为地方经济建设服务扩大地方高校学报发展空间--《苏州科技学院学报(工程技术版)》服务地方的认识与做法   总被引：11，自引：3，他引：8  

庞政梁 《编辑学报》2004,16(6):451-452

地方高校学报理当为地方经济建设和社会发展服务,而地方经济、社会的发展则为学报提供了广阔的用武之地.<苏州科技学院学报(工程技术版)>根据学校的专业特色和学科优势,除了报道适合各地、具有普遍意义的研究成果外,还加强对地方经济和社会等方面的理论研究与应用研究成果的报道,刊发了环境科学、建筑工程、防灾应变、古城保护等方面的论文.学报在为地方经济建设服务中不断扩大发展空间,努力体现刊物特色.  相似文献   

Multi-lagged-input iterative dynamic linearization based data-driven adaptive iterative learning control     

Na Lin  Ronghu Chi  Biao Huang  Zhongsheng Hou 《Journal of The Franklin Institute》2019,356(1):457-473

This article presents a multi-lagged-input based data-driven adaptive iterative learning control (M-DDAILC) method for nonlinear multiple-input-multiple-output (MIMO) systems by virtue of multi-lagged-input iterative dynamic linearization (IDL). The original nonlinear and non-affine MIMO system is equivalently transformed into a linear input-output incremental counterpart without loss of dynamics. The proposed learning law utilizes the desired trajectory to cancel the influence from iteration-by-iteration variations, as well as additional multi-lagged inputs to improve control performance. The developed iterative estimation law is more effective and also makes estimation of the unknown parameters easier because the dynamics for each parameter to represent are decreased by dividing the system into multiple components in the multi-lagged-input IDL formulation. Moreover, the proposed M-DDAILC does not need an explicit and accurate model. It is proved to be iteratively convergent with rigorous analysis. Both a numerical example and a practical application to a permanent magnet linear motor are provided to verify the validity and applicability of the proposed method.  相似文献   

Optimal synchronization controller design for complex dynamical networks with unknown system dynamics     

Ya-Wei Cao  Guang-Hong Yang  Xiao-Jian Li 《Journal of The Franklin Institute》2019,356(12):6071-6086

In this paper, the optimal synchronization controller design problem for complex dynamical networks with unknown system internal dynamics is studied. A necessary and sufficient condition on the existence of the optimal control minimizing a quadratic performance index is given. The optimal control law consists of a feedback control and a compensated feedforward control, and the feedback control gain can be obtained by solving the well-known Algebraic Riccati Equation (ARE). Especially, in the presence of unknown system dynamics, a novel adaptive iterative algorithm using the information of system states and inputs is proposed to solve the ARE to get the optimal feedback control gain. Finally, a simulation example shows the effectiveness of the theoretical results.  相似文献   

State and unknown input estimations for discrete-time switched linear systems with average dwell time     

Shenghui Guo  Bin Jiang  Fanglai Zhu  Qingbin Gao 《Journal of The Franklin Institute》2019,356(18):11741-11759

In this paper, the problem of state and unknown input estimations for a class of discrete-time switched linear systems with average dwell time switching is investigated. First, a proportional integral observer with an exponential H_∞ performance is constructed to estimate the system state and unknown input simultaneously. Second, both of the observability and the stability of the estimation error system are analyzed, then the derivation of the observer gain matrices is transformed into the calculation of linear matrix inequalities. Third, the obtained results are extended to the systems with output disturbances. Finally, two simulation examples are provided to show the validity and effectiveness of the proposed methods.  相似文献   

Static group synchronization of second-order multi-agent systems via pinning control     

Xiang-Gui Guo  Hong-Jian Li  Jun-Jie Zhao  Wei-Wei Che 《Journal of The Franklin Institute》2019,356(9):4842-4858

This paper investigates the expected static group synchronization problem of the second-order multi-agent systems via pinning control. For directed communication topology with spanning tree, based on Gershgorin disk theorem and the matrix property, a static pinning control protocol with fixed gains is first introduced and some sufficient and necessary static group synchronization criteria are also established. It is worth mentioning that a rigorous proof is also given that only one pinning node is needed to guarantee static group synchronization, which could be inferred that our protocol might be more economical and effective in large scale of multi-agent systems. Then, for weakly connected directed communication topology with nodes of zero in-degree, an adaptive pinning control applied to the node with zero in-degree is also proposed to achieve static group synchronization. Finally, the efficiency of the proposed protocols is verified by two simulation examples.  相似文献   

Model free adaptive iterative learning control for a class of nonlinear systems with randomly varying iteration lengths     

Xuhui Bu  Sen Wang  Zhongsheng Hou  Wei Liu 《Journal of The Franklin Institute》2019,356(5):2491-2504

This paper proposes a novel model free adaptive iterative learning control scheme for a class of unknown nonlinear systems with randomly varying iteration lengths. By applying the dynamic linearization technique along the iteration axis, such systems can be transformed into iteration-depended time varying linear systems. Then, an improved model free adaptive iterative learning control scheme can be constructed only using input and output data of the system. From the rigorous theoretical analysis, it is shown that the mathematical expectation of tracking errors converge to zero as iteration increases. This design does not require any dynamic information of the ILC systems and prior information of randomly varying iteration lengths. An illustrative example verifies the effectiveness of the proposed design.  相似文献   

A cyclic pursuit framework for networked mobile agents based on vector field approach     

Hamed Rezaee  Farzaneh Abdollahi 《Journal of The Franklin Institute》2019,356(2):1113-1130

This paper proposes a pursuit formation control scheme for a network of double-integrator mobile agents based on a vector field approach. In a leaderless architecture, each agent pursues another one via a cyclic topology to achieve a regular polygon formation. On the other hand, the agents are exposed to a rotational vector field such that they rotate around the vector field centroid, while they keep the regular polygon formation. The main problem of existing approaches in the literature for cyclic pursuit of double-integrator multiagent systems is that under those approaches, the swarm angular velocity and centroid are not controllable based on missions and agents capabilities. However, by employing the proposed vector field approach in this paper, while keeping a regular polygon formation, the swarm angular velocity and centroid can be determined arbitrary. The obtained results can be extended to achieve elliptical formations with cyclic pursuit as well. Simulation results for a team of eight mobile agents verify the accuracy of the proposed control scheme.  相似文献   

Output regulation for a class of positive switched systems     

Peng Wang  Dan Ma  Jun Zhao 《Journal of The Franklin Institute》2019,356(8):4513-4529

In this paper, a complete procedure for the study of the output regulation problem is established for a class of positive switched systems utilizing a multiple linear copositive Lyapunov functions scheme. The feature of the developed approach is that each subsystem is not required to has a solution to the problem. Moreover, two types of controllers and switching laws are devised. The first one depends on the state together with the external input and the other depends only the error. The conditions ensuring the solvability of the problem for positive switched systems are presented in the form of linear matrix equations plus linear inequalities under some mild constraints. Two examples are finally given to show the performance of the proposed control strategy.  相似文献