检索结果-内蒙古大学图书馆

22nd International Conference on MultiMedia Modeling, MMM 2016

作者： Li, Yuhui Xu, Jiucheng Zhang, Yifan Zhang, Chunjie Yin, Hongsheng Lu, Hanqing School of Computer and Information Engineering Henan Normal University Xinxiang China National Laboratory of Pattern Recognition Institute of Automation Chinese Academy of Science Beijing China School of Computer and Control Engineering University of China Academy of Sciences Beijing China China University of Mining and Technology Xuzhou China

ISBN: (纸本)9783319276700

Spatial pyramid matching (SPM) model is an extension of the bagof-visual words (BoW) model for local feature encoding. It firstly partitions the image into increasingly fine sub-regions, and then concatenates the histograms within each sub-region. However, the SPM model does not consider the spatial information differences between sub-regions explicitly. To make use of this information, we exploit a novel descriptor called spatial difference. In the process of promoting the performance of image classification, this descriptor is mainly used to concatenate the histograms of bag-of-visual words model under spatial pyramid matching framework. Finally, we conduct image classification experiments on several public datasets to demonstrate the effectiveness of the proposed scheme. © Springer International Publishing Switzerland 2016.

关键词： Image classification

来源：评论

学校读者我要写书评

暂无评论

Adaptive control for a cable driven robot arm

Adaptive control for a cable driven robot arm

引用

2012 9th IEEE International Conference on Mechatronics and Automation, ICMA 2012

作者： Ma, Jianjun Li, Yanan Ge, Shuzhi Sam Social Robotics Laboratory Interactive Digital Media Institute National University of Singapore Singapore 119077 Singapore Department of Automatic Control College of Mechatronics and Automation National University of Defense Technology Changsha 410073 China NUS Graduate School for Integrative Sciences and Engineering National University of Singapore Singapore 119613 Singapore Department of Electrical and Computer Engineering National University of Singapore Singapore 117576 Singapore Robotics Institute School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu 610054 China

ISBN: (纸本)9781467312776

The cable-driven mechanism is usually used in robotic systems for the efficient transmission of forces or torques from actuators to the end-effector. However, the control design is challenging for these systems due to the cable compliance and transmission elasticity. In this paper, adaptive control in a cascaded structure is designed for the trajectory tracking of a cable driven robot arm. The desired control input is obtained by developing an adaptation scheme, which does not require the computation of the regressor matrix. Proportional-derivative (PD) control is designed to specify the actual control input such that the trajectory tracking is achieved. Simulation results are provided to show the effectiveness of the proposed method. © 2012 IEEE.

关键词： Cables

来源：评论

学校读者我要写书评

暂无评论

Mamdani fuzzy parameter estimation algorithm for large-scale interconnected nonlinear systems

Mamdani fuzzy parameter estimation algorithm for large-scale...

引用

International Conference on sciences and Techniques of automatic control and computer engineering (STA)

作者： Mourad Elloumi Omar Naifar Hamdi Gassara Laboratory of Sciences and Techniques of Automatic control and computer engineering National School of Engineers of Sfax Sfax Tunisia Control and Energy Management Laboratory National School of Engineers of Sfax Sfax Tunisia

ISBN: (纸本)9781665482622

For the category of large-scale nonlinear processes that are composed of a set of linked monovariable systems and represented by discrete input-output models with unknown time-varying coefficients, the current study proposes a recursive algorithm of maximum likelihood estimation based on the fuzzy inference technique. This recursive estimator employs a prediction error strategy and a maximum likelihood estimation algorithm to formulate the issue of estimating the parameters of the process under consideration. The established parameter estimation approach is enhanced by the addition of the Mamdani fuzzy inference system. A numerical simulation exemplar is used to verify the efficacy of the generated theoretical results..

关键词： Fuzzy logic Maximum likelihood estimation Parameter estimation Computational modeling Process control Prediction algorithms Numerical simulation

来源：评论

学校读者我要写书评

暂无评论

ESNet: Evolution and Succession Network for High-Resolution Salient Object Detection 41

ESNet: Evolution and Succession Network for High-Resolution ...

引用

41st International Conference on Machine Learning, ICML 2024

作者： Liu, Hongyu Cong, Runmin Li, Hua Xu, Qianqian Huang, Qingming Zhang, Wei Institute of Information Science Beijing Jiaotong University Beijing Key Laboratory of Advanced Information Science and Network Technology Beijing China School of Control Science and Engineering Shandong University Key Laboratory of Machine Intelligence and System Control Ministry of Education Jinan China School of Computer Science and Technology Hainan University Hainan China Key Laboratory of Intelligent Information Processing Institute of Computing Technology CAS Beijing China School of Computer Science and Technology University of Chinese Academy of Sciences Beijing China

Preserving details and avoiding high computational costs are the two main challenges for the High-Resolution Salient Object Detection (HRSOD) task. In this paper, we propose a two-stage HRSOD model from the perspective of evolution and succession, including an evolution stage with Low-resolution Location Model (LrLM) and a succession stage with High-resolution Refinement Model (HrRM). The evolution stage achieves detail-preserving salient objects localization on the low-resolution image through the evolution mechanisms on supervision and feature;the succession stage utilizes the shallow high-resolution features to complement and enhance the features inherited from the first stage in a lightweight manner and generate the final high-resolution saliency prediction. Besides, a new metric named Boundary-Detail-aware Mean Absolute Error (MAEBD) is designed to evaluate the ability to detect details in high-resolution scenes. Extensive experiments on five datasets demonstrate that our network achieves superior performance at real-time speed (49 FPS) compared to state-of-the-art methods. Our code is publicly available at: https://***/rmcong/ESNet_ICML24. Copyright 2024 by the author(s)

关键词： Miocene

来源：评论

学校读者我要写书评

暂无评论

Model-based fault diagnosis of an actuator system driven by the brushless DC motor

Model-based fault diagnosis of an actuator system driven by ...

引用

American control Conference (ACC)

作者： O. Moseler D. Juricic A. Rakar N. Muller Institute of Automatic Control Laboratory of Control Engineering and Process Automation Darmstadt University of Technology Darmstadt Germany Department of Computer Automation and Control Jozef Stefan Institute Ljubljana Slovenia

A fault detection and isolation scheme for a brushless DC motor driving a mechanical actuation system is presented. First, a detailed mathematical model of the drive is derived. The residual generator is based on parity relations while the fault isolation part is implemented by means of the transferable belief model. The problem of distinguishing between faults with the same fault signatures is addressed. It is shown that additional improvements in terms of resolution can be achieved by employing parameter estimation. The proposed FDI scheme is tested on the actual drive under various faults. The achieved performance features the highest resolution, diagnostic stability and accuracy.

关键词： Fault diagnosis Actuators Brushless DC motors DC motors Coils Rotors Stators Fault detection Pulse width modulation Mathematical model

来源：评论

学校读者我要写书评

暂无评论

Powertrain modeling with modelica

Powertrain modeling with modelica

引用

ASME 2000 International Mechanical engineering Congress and Exposition, IMECE 2000

作者： Tiller, Michael Davis, Cleon Tummescheit, Hubertus Trigui, Nizar Ford Motor Company Scientific Research Laboratory 2101 Village Road DearbornMI48197 United States School of Electrical and Computer Engineering Georgia Institute of Technology AtlantaGA30332-0250 United States Department of Automatic Control Lund Institute of Technology Box 118 LundSE-22100 Sweden

ISBN: (纸本)9780791826645

In this paper we will describe the development of models for prediction of powertrain performance. Our goal is to develop a library of components to model combustion, gas dynamics and mechanical response. We will also demonstrate the ease with which we can replace traditional component models (e.g., mechanically actuated valves) with non-traditional component models (e.g., electro-mechanically actuated valves) without having to change or reformulate any of the other components in our system. The models were developed using the Modelica modeling language (Modelica Design Group, 1999) which allows component-based descriptions of behavior for complex engineering systems. Modelica is particularly well suited for creating behavioral models that are typical for powertrain plant models In addition to writing component models, the freely available Modelica Standard Library contains basic models from various engineering disciplines (e.g., resistors, shafts, springs). With this approach, models can be symbolically preprocessed to improve computational performance. In addition, code can be generated from the Modelica model which can be used as either a stand alone analysis tool, imported into Simulink1 as an S-function or downloaded for use in real-time hardware in the loop experiments. © 2000 by ASME

关键词： Gas dynamics

来源：评论

学校读者我要写书评

暂无评论

Artificial neural network-based direct power control to enhance the performance of a PMSG-wind energy conversion system under real wind speed and parameter uncertainties: An experimental validation

引用

Energy Reports 2024年 11卷 4356-4378页

作者： Majout, Btissam Bossoufi, Badre Karim, Mohammed Skruch, Pawel Mobayen, Saleh El Mourabit, Youness El Zair Laggoun, Zakaria Laboratory of Engineering Modelling and Systems Analysis SMBA University Fez Morocco Department of Automatic Control and Robotics AGH University of Krakow Poland Graduate School of Intelligent Data Science National Yunlin University of Science and Technology 123 University Road Section 3 Yunlin Douliou640301 Taiwan National School of Applied Sciences Abdelmalek Essaadi University Tetouan Morocco Laboratory of Electrotechnique Constantine Mentouri Brothers Constantine 1 University Constantine Algeria

With the increasing emphasis on embedding advanced technology into system controls, the Direct Power control (DPC) approach has garnered considerable attention due to its simple and highly adaptable algorithm. This approach has been increasingly recognized in numerous applications. However, the variable frequency, harmonic distortion of the currents, and power ripples caused by Hysteresis controllers and switching tables decrease its effectiveness and robustness, affecting the system's performance. For this reason, this paper proposed a new DPC based on Artificial Neural Network (ANN) approaches. In this approach, the hysteresis comparator and the switching table are substituted with ANN controllers and then applied on both sides: machine-side converter (MSC) and grid-side converter (GSC) of a Permanent Magnet Synchronous Generator based Wind Energy Conversion System (PMSG-WECS). Moreover, to make the system more efficient in varying wind conditions, this study expands the utilization of the artificial neural networks (ANN) to encompass the maximum power point tracking (MPPT) control strategy. To demonstrate the effectiveness of the proposed approach on the system behaviors, a simulation test was carried out in the Matlab/Simulink environment, using a real wind profile of a Moroccan city (Essaouira). In comparison to the classical DPC control, the simulation results showed the superior performance of the proposed ANN-DPC control in terms of reference tracking, response time, overshoot, precision, and its capacity to reduce the rate of power ripples and total harmonic distortion (THD) in the injected currents. Furthermore, a robustness test was also included in this work to check the robustness of the proposed control against parameters variation. In conclusion, the feasibility and effectiveness of the ANN-DPC control approach were confirmed through experimental validation using the dSPACE DS1104 board. © 2024 The Authors

关键词： MATLAB

来源：评论

学校读者我要写书评

暂无评论

A general and simple method for evaluating the electrical transport performance of graphene by the van der Pauw–Hall measurement

引用

Science Bulletin 2018年第22期63卷 1521-1526页

作者： Fangzhu Qing Yang Shu Linsen Qing Yuting Niu He Guo Shuyi Zhang Chunlin Liu Changqing Shen Wanli Zhang Samuel S.Mao Wenjuan Zhu Xuesong Li State Key Laboratory of Electronic Thin Films and Integrated Devices &School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 610054China Chengdu Institute of Biology Chinese Academy of SciencesChengdu 610041China National Engineering Research Center of Electromagnetic Radiation Control Materials University of Electronic Science and Technology of ChinaChengdu 610054China Institute of New Energy Shenzhen 518031China Department of Mechanical Engineering University of California at BerkeleyBerkeleyCA 94720USA Department of Electrical and Computer Engineering University of Illinois at Urbana-ChampaignUrbanaIL 61801USA

Expected for many promising applications in the field of electronics and optoelectronics, a reliable method for the characterization of graphene electrical transport properties is desired to predict its device performance or provide feedback for its ***, the commonly used methods of extracting carrier mobility from graphene field effect transistor or Hall-bar is time consuming, expensive, and significantly affected by the device fabrication process other than graphene *** we reported a general and simple method to evaluate the electrical transport performance of graphene by the van der Pauw–Hall *** annealing graphene in vacuum to remove the adsorbed dopants and then exposing it in ambient surroundings, carrier mobility as a function of density can be measured with the increase of carrier density due to the dopant re-adsorption from the ***, the relationship between the carrier mobility and density can be simply fitted with a power equation to the first level approximation, with which any pair of measured carrier mobility and density can be normalized to an arbitrary carrier density for *** experimentally demonstrated the reliability of the method, which is much simpler than making devices and may promote the standard making for graphene characterization.

关键词： Graphene Van der Pauw Hall Chemical vapor deposition (CVD)

来源：评论

学校读者我要写书评

暂无评论

STP: single-cell partition for subcellular spatially-resolved transcriptomics

引用

Nature Communications 2025年第1期16卷 1-10页

作者： Li, Haoyang Hu, Qinan Qiu, Zhaowen Xiong, Hui Hu, Yuhui Gao, Xin Computer Science Program Computer Electrical and Mathematical Sciences and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia Center of Excellence for Smart Health (KCSH) King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia Center of Excellence on Generative AI King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia Department of Pharmacology School of Medicine Southern University of Science and Technology Shenzhen China Joint Laboratory of Guangdong-Hong Kong Universities for Vascular Homeostasis and Diseases School of Medicine Southern University of Science and Technology Shenzhen Guangdong China SUSTech Homeostatic Medicine Institute School of Medicine Southern University of Science and Technology Shenzhen China College of Computer and Control Engineering Northeast Forestry University Harbin China Key Laboratory of Hepatosplenic Surgery Ministry of Education The First Affiliated Hospital of Harbin Medical University Harbin China Heilongjiang Tuomeng Technology Co. Ltd. Harbin China Thrust of Artificial Intelligence The Hong Kong University of Science and Technology (Guangzhou) Guangzhou China Department of Computer Science and Engineering The Hong Kong University of Science and Technology SAR Hong Kong Research center for chemical biology and omics analysis Guangming Advanced Research Institute Southern University of Science and Technology Shenzhen China

Spatially-resolved transcriptomics (SRT) technologies now allow exploration of gene expression with spatial context. Recent advances achieving subcellular resolution provide richer data but also introduce challenges, such as aggregating subcellular spots into individual cells, which is a task distinct from traditional deconvolution. Existing methods often grid SRT data into predefined squares, which is unrealistic for accurately capturing cellular boundaries. We propose a method, STP, that integrates subcellular SRT data with nuclei-stained images to partition individual cells. STP first segments nuclei and maps their masks onto the SRT data, then uses a simulated-annealing-inspired approach to expand nuclear boundaries to the full cellular level. Evaluated on subcellular SRT datasets from Drosophila embryos at multiple developmental stages and from mouse embryos with a large field-of-view, STP demonstrated accurate single-cell partitioning, unveiling significant spatial tissue patterns and identifying undetected cell types beyond previous methods. © The Author(s) 2025.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Identification and self-tuning regulation of a solar system

Identification and self-tuning regulation of a solar system

引用

International Conference on Communications, Computing and control Applications (CCCA)

作者： Mourad Elloumi Samira Kamoun Nacer M'Sirdi Aziz Naamane University of Sfax Laboratory of Sciences and Techniques of Automatic control & computer engineering (Lab-STA) Sfax Tunisia University of Saint Jérôme Polytech'Marseille Laboratory of Computer Sciences and systems (LSIS) Marseille

This paper deals with the parameter estimation and the self-tuning regulation of a solar system, which is composed of a solar cell followed by a boost converter. The considered system is described by an input-output stochastic mathematical model at discrete-time, with unknown but constant or slowly time-varying parameters. This parameter estimation is conducted based on the method of prediction error and least squares techniques. The posed regulation problem consists in the development of a self-tuning regulator on the basis of the generalized minimum-variance approach. Thus, a generalized minimum-variance self-tuning regulator is developed. A numerical simulation of the self-tuning regulation of the considered stochastic system is treated.

关键词： Mathematical model Solar system Estimation Time varying systems Photovoltaic cells Vectors Regulators

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：