检索结果-内蒙古大学图书馆

Chinese Automation Congress (CAC)

作者： Zhang, Caihong Zhang, Tiezhu Wang, Dongqing Ji, Zhijian Liu, Yunlong Qingdao Univ Coll Automat & Elect Engn Qingdao 266100 Peoples R China Shandong Univ Technol Headmasters Off Zibo 255000 Peoples R China Weifang Univ Coll Informat & Control Engn Weifang 261061 Peoples R China

ISBN: (纸本)9781538635247

This paper concerns the control law design by variable structure control for a kind of uncertain discrete-time systems. Why the chattering shows up for this kind of systems by discrete reaching law is investigated, and then a developed variable structure controller is designed based on grey prediction iterative algorithm. Based on the grey prediction model, the parameter values are obtained. A criterion that the system state reaches the switching hyper plane in limited time is provided. In this paper its novelty is that the arrival time can be shorten by the developed variable structure controller based on grey prediction iterative algorithm. Approaching to the equilibrium state, chattering of the system can be reduced. Extensive simulation results are presented to illustrate the effectiveness by the developed method.

关键词： Variable structure control discrete-time system boundary layer chattering gray prediction iterative algorithm

来源：评论

学校读者我要写书评

暂无评论

Gradient-based iterative algorithm for the extended coupled Sylvester matrix equations 29

Gradient-based iterative algorithm for the extended coupled ...

引用

第29届中国控制与决策会议

作者： Zhang Huamin School of Science Bengbu University School of Internet of Things Engineering Jiangnan University

ISBN: (纸本)9781509046584

A gradient-based iterative algorithm is established for solving the extended coupled Sylvester matrix equations A XB + A YB = F and C XD + C XD = F by using the hierarchical identification *** prove that the iterative solution converges fast to the exact one for any initial iterative value if the coupled matrix equations has a unique solution.A numerical example is offered to illustrate the efficiency of the proposed algorithm.

关键词： iterative algorithm Coupled Sylvester matrix equations Hierarchical identification principle

来源：评论

学校读者我要写书评

暂无评论

Mixed-Norm Projection-Based iterative algorithm for Face Recognition 16th

Mixed-Norm Projection-Based Iterative Algorithm for Face Rec...

引用

16th International Symposium on Neural Networks (ISNN)

作者： Liu, Qingshan Xiong, Jiang Yang, Shaofu Southeast Univ Sch Math Nanjing 210096 Peoples R China Chongqing Three Gorges Univ Key Lab Intelligent Informat Proc & Control Chong Chongqing 404100 Wanzhou Peoples R China Southeast Univ Sch Comp Sci & Engn Nanjing 210096 Peoples R China

ISBN: (纸本)9783030228088;9783030228071

In this paper, the mixed-norm optimization is investigated for sparse signal reconstruction. Furthermore, an iterative optimization algorithm based on the projection method is presented for face recognition. From the theoretical point of view, the optimality and convergence of the proposed algorithm is strictly proved. And from the application point of view, the mixed norm combines the L-1 and L-2 norms to give a sparse and collaborative representation for pattern recognition, which has higher recognition rate than sparse representation algorithms. The algorithm is designed by combining the projection operator onto a box set with the projection matrix, which is effective to guarantee the feasibility of the optimal solution. Moreover, numerical experiments on randomly generated signals and three face image data sets are presented to show that the mixed-norm minimization is a combination of sparse representation and collaborative representation for pattern classification.

关键词： Mixed norm Projection method iterative algorithm Face recognition

来源：评论

学校读者我要写书评

暂无评论

Extending the applicability and convergence domain of a higher-order iterative algorithm under ω condition

引用

RENDICONTI DEL CIRCOLO MATEMATICO DI PALERMO 2022年第1期71卷 469-482页

作者： Argyros, Ioannis K. Sharma, Debasis Argyros, Christopher I. Parhi, Sanjaya Kumar Sunanda, Shanta Kumari Cameron Univ Dept Math Sci Lawton OK 73505 USA IIIT Bhubaneswar Dept Math Bhubaneswar 751003 Odisha India Univ Oklahoma Dept Comp Sci Norman OK 73071 USA Fakir Mohan Univ Dept Math Balasore 756020 Odisha India

The main contribution of this study is that the applicability and convergence domain of a fifth-order convergent equation solver is extended. We use omega condition on the first Frechet derivative to study the local analysis, and this expands the applicability of the formula for such problems where the earlier study based on Lipschitz constants cannot be used. Also, we avoid the use of the extra assumption on boundedness of the first derivative of the nonlinear operator. Our idea can be used on other iterative methods. Numerical tests confirmed that the proposed analysis produces a larger convergence domain, in comparison to the earlier study, without using additional conditions.

关键词： Local convergence iterative algorithm Banach space omega continuity condition

来源：评论

学校读者我要写书评

暂无评论

Separable joint gradient-based iterative algorithm for multi-frequency sine signals 33

Separable joint gradient-based iterative algorithm for multi...

引用

33rd Chinese Control and Decision Conference (CCDC)

作者： Xu, Ling Wuxi Vocat Inst Commerce Sch Internet Things Technol Wuxi 214153 Jiangsu Peoples R China

ISBN: (纸本)9781665440899

This paper considers a problem of signal modeling for multi-frequency signals. Because many characteristic parameters are contained in the multi-frequency signals, it is difficult to obtain these estimates of these characteristic parameters. According to the different relations between the signal output and the amplitude parameters and frequency parameters of the multi-frequency sine signal, the signal parameters are divided into two parameter sets. In terms of these two different parameter sets, two identification sub-models are constructed for deriving two identification sub-algorithms by means of the gradient search and iterative technique. By uniting two identification algorithms, a joint gradient-based iterative signal modeling method is presented for estimating the total parameters of the multi-frequency sine signal. The performance of the proposed signal modeling method is validated through the computer simulations.

关键词： Signal processing Gradient search Parameter estimation iterative algorithm multi-frequency sine signal

来源：评论

学校读者我要写书评

暂无评论

Absolute calibration of three reference flats based on an iterative algorithm: study and implementation

Absolute calibration of three reference flats based on an it...

引用

Conference on Optical Fabrication, Testing, and Metrology IV

作者： Morin, Chloe Bouillet, Stephane CEA CESTA DAM F-33114 Le Barp France

ISBN: (纸本)9780819487957

LMJ and LIL are two French high power lasers dedicated to fusion and plasma experiments. These laser beams involve hundreds of large optical components, the clear aperture of the beams being 400x400 mm(2). In order to control the flatness requirements of its optics, the CEA has an 800 mm diameter Fizeau interferometer. Determining if optical components fulfil the very strict wavefront specifications can be difficult because these specifications can be equivalent to the defects of the reference flats of the interferometer. That is why we want to calibrate our reference flats in order to subtract their defects from the performed measurements. This absolute calibration is based on an iterative algorithm requiring three reference flats. In addition to the three basic combinations of the three flats, this method uses rotations and translations of one flat with respect to the others. First, we shall present a characterization of this method. The choice of different parameters, as the operations of translations and rotations required, will be discussed. Moreover, experimental errors have been introduced in the simulations and their limit values have been studied with regard to the other parameters. An application of this method on our three reference flats has been implemented over a 600 mm diameter. An absolute calibration requires a very precise implementation of the measurements and then we will see why data processing is necessary to reduce the residual shifts in translation but also in rotation and in zoom between the different measurements. Lastly, first uses of the absolute maps show a factor 5 to 10 improvement on the final accuracy.

关键词： Fizeau interferometry surface measurements absolute calibration iterative algorithm

来源：评论

学校读者我要写书评

暂无评论

An iterative algorithm of Linear Least Squares to Identify Online the Capacity of Supercapacitor 5

An Iterative Algorithm of Linear Least Squares to Identify O...

引用

IEEE 5th Information Technology and Mechatronics Engineering Conference (ITOEC)

作者： Zhang, Kai Li, Yaguo Bai, Lu Yang, Dongdong Li, Guanliang Pei, Chu State Grid Shanxi Elect Power Res Inst Equipment Status Evaluat Ctr Taiyuan Peoples R China State Grid Shanxi Elect Power Co Taiyuan Peoples R China

ISBN: (纸本)9781728143231;9781728143224

It is known that supercapacitors exhibits a voltage-dependent capacitance and the capacitance varies approximately linearly with voltage in the normal operation voltage range. To solve the online supercapacitor capacity identification problem, which is an important function to implement in supercapacitor management system, firstly, linear least squares (LLS) is applied to get a closed-form solution based on a sequence of sampling terminal voltage and charging current data, and in the meanwhile, the details of voltage data processing to obtain more accurate differential capacitance values are elaborated. Secondly, to overcome the difficulty that the closed-form solution involves large data set, takes calculation of matrix inverse, and hence leads to heavy computing burden, an iterative algorithm of LLS is deduced, which gets rid of calculating matrix inverse directly, decomposes the computing burden of LLS into each sampling period, and therefore makes itself more applicable in online identification situations. Lastly, the effectiveness of the algorithm is verified by experiment.

关键词： supercapacitor online identification linear least squares iterative algorithm

来源：评论

学校读者我要写书评

暂无评论

An iterative algorithm with a Tuning Parameter for Continuous Lyapunov Matrix Equations 37

An Iterative Algorithm with a Tuning Parameter for Continuou...

引用

37th Chinese Control Conference (CCC)

作者： Wang, Zhi-Qun Sun, Hui-Jie Wu, Ai-Guo Chai, Hua Harbin Inst Technol Shenzhen Grad Sch Shenzhen 518055 Peoples R China CNPC Nat Gas Plant ChangQing Oil Field Constituent Co Jingbian 718500 Shaanxi Peoples R China

ISBN: (纸本)9789881563958

In this paper, by introducing a tuning parameter, an explicit iterative algorithm is constructed for solving the continuous Lyapunov matrix equations associated with Ito stochastic systems. A necessary and sufficient condition is provided to guarantee the convergence of the proposed algorithm by using the Kronecker product. Moreover, some easily verifiable convergence results are developed for the proposed algorithm based on the obtained necessary and sufficient condition. In addition, a method is given for the selection of the optimal tuning parameter. Finally, an example is applied to verify the effectiveness of the presented algorithm.

关键词： Continuous Lyapunov matrix equation iterative algorithm convergence condition optimal tuning parameter

来源：评论

学校读者我要写书评

暂无评论

Ishakawa type iterative algorithm for nonlinear variational inclusions with H-monotone mappings

Ishakawa type iterative algorithm for nonlinear variational ...

引用

International Computer Conference on Wavelet Active Media Technology and Information Processing

作者： Jin, Mao Ming Li, Jian Ping Logist Engn Univ Chongqing 400016 Peoples R China Fuling Normal Univ Dept Math Chongqing Peoples R China

ISBN: (纸本)9812700420

In this paper, we introduce a new class of nonlinear variational inclusions with H-monotone mappings. By using the resolvent operator method associated with H-monotone mappings in Hilbert spaces. we prove the existence and uniqueness of solution for this class of nonlinear variational inclusions. We also construct a new Ishikawa type iterative algorithm for finding approximate the solution of this nonlinear variational inclusion and discuss the convergence and stability of sequence of iterates generated by the algorithm. The present results improve and extend many known results in the literature.

关键词： H-monotone mapping variational inclu-sion resolvent operator technique iterative algorithm stability

来源：评论

学校读者我要写书评

暂无评论

Efficient beam multiplexing and improving efficiency of a spatial light modulator using an iterative algorithm 20

Efficient beam multiplexing and improving efficiency of a sp...

引用

Conference on Laser Beam Shaping XX

作者： Chandra, Amar Deo Banerjee, Ayan Indian Inst Sci Educ & Res Kolkata Ctr Excellence Space Sci India Mohanpur 741246 W Bengal India Indian Inst Sci Educ & Res Kolkata Dept Phys Sci Mohanpur 741246 W Bengal India

ISBN: (纸本)9781510637795

We generate optimised phase masks by using an iterative Fourier Transform algorithm (IFTA) and use it for beam multiplexing in an experiment to generate an array of uniform spots in 1D and 2D. We quantify the efficacy of the iterative algorithm experimentally by computing the uniformity and the efficiency and show that the optimised phase masks yield multiplexed beamlets having high uniformity (similar to 90%). We also find that the algorithm converges within few tens of iterations requiring moderate computational budget and can be useful for almost real-time applications. We compare the performance of the iterative algorithm with global linear corrections in the look-up table (LUT) of a phase limited SLM and find that the former perform with about 20% better efficiency. Besides obtaining array of 1D/2D spots having high uniformity using IFTA, our result exemplifies the use of iterative algorithms for improving efficiency of phase limited SLMs, which is a less explored area of research.

关键词： Spatial light modulators beam shaping computer-generated hologram iterative algorithm

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：