检索结果-内蒙古大学图书馆

A preclinical system for enhancing the efficiency of microwave breast cancer hyperthermia therapy using dielectric matched layer and convex lenses

引用

Progress In Electromagnetics research C 2021年 109卷 153-168页

作者： Abdel-Haleem, Maha R. Abouelnaga, Tamer Ahmed, Sabah M. Abo-Zahhad, Mohammed Department of Electronics and Communications Engineering Egypt-Japan University of Science and Technology Alexandria21934 Egypt Department of Microstrip Circuits Electronics Research Institute Giza Cairo12622 Egypt Department of Electronics and Communication Engineering Higher Institute of Engineering and Technology Kafrelsheikh Egypt Department of Mechatronics and Robotics Engineering E-JUST-Alexandria 21934 Egypt Department of Electronics and Electrical Engineering Faculty of Engineering Assiut University Assiut Egypt

—Convex lenses can be used in adjuvant with microwave sources to produce appropriate focus spots for breast cancer hyperthermia therapy. A preclinical system was assessed using a horn antenna together with a convex lens. The horn antenna was built to accommodate the lens size so as to minimize wave spillover. Here, a modified hyperthermia system was tested on a hemisphere phantom of scattered fibro glandular breast tissue with cancer stages I & II. The focus spots were at different locations and depths (up to 2.7 cm) under the skin layer. Transmission and reflection coefficients at the air-breast phantom interface were calculated to determine the best operating frequency (2.45 GHz) for efficient power absorption. Based on these computations, an external dielectric matched layer was added onto the skin of the breast phantom to decrease reflection that would occur between water and skin. This arrangement increased wave transmission inside the breast without increasing applicator input feed. The system could heat regions of tumor at various locations independently using only one applicator. The whole system was fabricated, and measurements were taken to validate the simulated and analytical results. © 2021, Electromagnetics Academy. All rights reserved.

关键词： Hyperthermia therapy

来源：评论

学校读者我要写书评

暂无评论

Mani-GPT: A Generative Model for Interactive Robotic Manipulation

Mani-GPT: A Generative Model for Interactive Robotic Manipul...

引用

2023 International Conference on Biomimetic Intelligence and robotics

作者： Zhang, Zhe Chai, Wei Wang, Jiankun Shenzhen Key Laboratory of Robotics Perception and Intelligence Shenzhen China Department of Electronic and Electrical Engineering Southern University of Science and Technology Shenzhen China Jiaxing Research Institute Southern University of Science and Technology Jiaxing China Department of Orthopedics the Fourth Medical Center of PLA General Hospital Beijing China National Clinical Research Center for Orthopedics Sports Medicine and Rehabilitation Beijing China

In real-world scenarios, human dialogues are multi-round and diverse. Furthermore, human instructions can be unclear and human responses are unrestricted. Interactive robots face difficulties in understanding human intents and generating suitable strategies for assisting individuals through manipulation. In this article, we propose Mani-GPT, a Generative Pre-trained Transformer (GPT) for interactive robotic manipulation. The proposed model has the ability to understand the environment through object information, understand human intent through dialogues, generate natural language responses to human input, and generate appropriate manipulation plans to assist the human. This makes the human-robot interaction more natural and humanized. In our experiment, Mani-GPT outperforms existing algorithms with an accuracy of 84.6% in intent recognition and decision-making for actions. Furthermore, it demonstrates satisfying performance in real-world dialogue tests with users, achieving an average response accuracy of 70%. © 2023 The Authors. Published by Elsevier B.V.

关键词： Decision making

来源：评论

学校读者我要写书评

暂无评论

Real-time Testbed for Smart Substation Interoperability: A Case Study on Auxiliary Control System

Real-time Testbed for Smart Substation Interoperability: A C...

引用

2023 Panda Forum on Power and Energy, PandaFPE 2023

作者： Chang, Zhengwei Cai, Dongsheng Wu, Jie Guan, Zexiang Feng, Fuyong Zheng, Zhou Qu, Jia He, Muxing Abulanwar, Saved State Grid Sichuan Electric Power Company Electric Power Research Institute Chengdu China The College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China Huaneng Tibet the Yarlung Zangbo River Hydropower Development Investment Co. Ltd Chengdu China Mansoura University Electrical Engineering Department Egypt

ISBN: (纸本)9798350321173

Smart substation auxiliary control system (SSACS) is an important part of the smart substation. Among them, the national grid technical standards have made corresponding provisions on the function, composition, communication, etc. of the auxiliary control system, but they are relatively general. And there are some differences in the division, functions, access methods, and other aspects of the subsystem. At the same time, there are great differences in the product realization of various manufacturers, which brings serious problems to the operation and maintenance of smart substations. A simulation-based test framework is proposed to design a test system for the smart substation auxiliary control system to strictly test the whole system. All the devices and IEC 61850 protocols are tested by the proposed simulators. The experiment results show the test system can effectively test the auxiliary control system. © 2023 IEEE.

关键词： Control systems

来源：评论

学校读者我要写书评

暂无评论

Nash Pursuit Strategy for Nonzero-Sum MPC Game via Inverse Optimal Control 13

Nash Pursuit Strategy for Nonzero-Sum MPC Game via Inverse O...

引用

13th Asian Control Conference, ASCC 2022

作者： Qiu, Tianyu Zhang, Han Wang, Jingchuan Department of Automation School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai China Institute of Medical Robotics Shanghai Jiao Tong University Shanghai China Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai200240 China Shanghai Engineering Research Center of Intelligent Control and Management Shanghai200240 China

ISBN: (纸本)9788993215236

In this paper, a traditional one v.s. one pursuit and evasion scenario is considered. The evader aims to reach her target and avoid being captured by the pursuer, while the pursuer, without the knowledge of the evader's cost function, intends to capture the evader before she successfully escapes. We formulate this problem as a Model Predictive Control Decoupled Pursuit and Evasion Game (MPC-DPEG) model with incomplete information. We apply Inverse Optimal Control (IOC) technique to estimate the evader's cost function and give a Nash pursuit strategy for MPC-DPEG as the optimal strategy for the pursuer. Numerical examples reveal the improvement of pursuit performance of the Nash pursuit strategy based on the estimated cost function over naive pursuit strategies. © 2022 ACA.

关键词： Simulation Optimal control Games Predictive models Cost function Numerical models Predictive control

来源：评论

学校读者我要写书评

暂无评论

Virtual Reality Based Robot Teleoperation via Human-Scene Interaction

Virtual Reality Based Robot Teleoperation via Human-Scene In...

引用

2023 International Conference on Biomimetic Intelligence and robotics

作者： Meng, Lingxiao Liu, Jiangshan Chai, Wei Wang, Jiankun Meng, Max Q.-H. Shenzhen Key Laboratory of Robotics Perception and Intelligence Shenzhen China Department of Electronic and Electrical Engineering Southern University of Science and Technology Shenzhen China Jiaxing Research Institute Southern University of Science and Technology Jiaxing China Department of Orthopedics the Fourth Medical Center of PLA General Hospital Beijing China National Clinical Research Center for Orthopedics Sports Medicine and Rehabilitation Beijing China

Robot teleoperation gains great success in various situations, including chemical pollution rescue, disaster relief, and long-distance manipulation. In this article, we propose a virtual reality (VR) based robot teleoperation system to achieve more efficient and natural interaction with humans in different scenes. A user-friendly VR interface is designed to help users interact with a desktop scene using their hands efficiently and intuitively. To improve user experience and reduce workload, we simulate the process in the physics engine to help build a preview of the scene after manipulation in the virtual scene before execution. We conduct experiments with different users and compare our system with a direct control method across several teleoperation tasks. The user study demonstrates that the proposed system enables users to perform operations more instinctively with a lighter mental workload. Users can perform pick-and-place and object-stacking tasks in a considerably short time, even for beginners. Our code is available at https://***/lingxiaomeng/VR_Teleoperation_Gen3. © 2023 The Authors. Published by Elsevier B.V.

关键词： Remote control

来源：评论

学校读者我要写书评

暂无评论

Anomaly Detection Based on Principle of Justifiable Granularity and Probability Density Estimation

Anomaly Detection Based on Principle of Justifiable Granular...

引用

2023 China automation Congress, CAC 2023

作者： Du, Sheng Ma, Xian Li, Xiang Wu, Min Cao, Weihua Pedrycz, Witold School of Automation China University of Geosciences Wuhan430074 China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Wuhan430074 China Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education Wuhan430074 China University of Alberta Department of Electrical and Computer Engineering EdmontonABT6G 2R3 Canada Systems Research Institute Polish Academy of Sciences Warsaw00-901 Poland Istinye University Faculty of Engineering and Natural Sciences Department of Computer Engineering Istanbul Sariyer Turkey

ISBN: (纸本)9798350303759

Anomaly detection is essential to ensure the safety of industrial processes. This paper presents an anomaly detection approach based on the probability density estimation and principle of justifiable granularity. First, time series data are transformed into a two-dimensional information granule by the principle of justifiable granularity. Then, the test statistic is constructed, and the probability density and cumulative distribution functions of the test statistic are calculated. Next, the confidence level determines the test threshold. Finally, the time series data of a key parameter in the sintering process is used as a case study. The experimental result demonstrates that the proposed approach can detect abnormal time series data effectively, providing an accurate and effective solution for detecting time series anomalies in industrial processes. © 2023 IEEE.

关键词： Time series

来源：评论

学校读者我要写书评

暂无评论

Incremental Joint Learning of Depth, Pose and Implicit Scene Representation on Monocular Camera in Large-scale Scenes

arXiv

引用

arXiv 2024年

作者： Deng, Tianchen Wang, Nailin Wang, Chongdi Yuan, Shenghai Wang, Jingchuan Wang, Danwei Chen, Weidong The Institute of Medical Robotics Department of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Ministry of Education Shanghai200240 China The School of Electrical and Electronic Engineering Nanyang Technological University Singapore

Dense scene reconstruction for photo-realistic view synthesis has various applications, such as VR/AR, autonomous vehicles. However, most existing methods have difficulties in large-scale scenes due to three core challenges: (a) inaccurate depth input. Accurate depth input is impossible to get in real-world large-scale scenes. (b) inaccurate pose estimation. Existing methods are not robust enough with the growth of cumulative errors in large scenes and long sequence. (c) insufficient scene representation capability. A single global radiance field lacks the capacity to effectively scale to large-scale scenes. To this end, we propose an incremental joint learning framework, which can achieve accurate depth, pose estimation, and large-scale scene reconstruction. A vision transformer-based network is adopted as the backbone to enhance performance in scale information estimation. For pose estimation, a feature-metric bundle adjustment (FBA) method is designed for accurate and robust camera tracking in large-scale scenes. In terms of implicit scene representation, we propose an incremental scene representation method to construct the entire large-scale scene as multiple local radiance fields to enhance the scalability of 3D scene representation. Extended experiments have been conducted to demonstrate the effectiveness and accuracy of our method in depth estimation, pose estimation, and large-scale scene reconstruction. The code will be open-sourced upon paper acceptance. © 2024, CC BY-NC-SA.

关键词： Depth perception

来源：评论

学校读者我要写书评

暂无评论

Design a High-Frequency Dual Active Bridge Converter for Discrete Time Frequency

Design a High-Frequency Dual Active Bridge Converter for Dis...

引用

Advancements in electrical, Electronics, Communication, Computing and automation (ICAECA), International Conference on

作者： M. Karthik G. Hemalatha M. Mathankumar L. Sreevidya R. Deepalakshmi V. Kandasamy Department of Electrical and Electronics Engineering SRM Madurai College for Engineering and Technology Pottapalayam Tamil Nadu India Department of Robotics and Automation Sri Ramakrishna Engineering College Coimbatore Tamil Nadu India Department of Electrical and Electronics Engineering SRM Institute of Science and Technology Trichy Tamil Nadu India Department of Electrical and Electronics Engineering V.S.B College of Engineering Technical Campus Coimbatore Tamil Nadu India Department of Computer Science Engineering SRM Madurai College for Engineering and Technology Pottapalayam Tamil Nadu India Department of Electrical and Electronics Engineering Kumaraguru College of Technology Coimbatore India

ISBN: (数字)9798331525439

ISBN: (纸本)9798331525446

The dual active bridge (DAB) has become a crucial interface element in today's sophisticated systems. Renewable energy sources produce DC power, which is then stored in batteries, ultra-capacitors, and other energy storage devices. DAB is a crucial part of power exchange between two different buses because of its galvanic separation and bidirectional power transfer capabilities. The operation of the DAB is compatible with a broad range of input voltages and output loads. The creation of DAB is covered in most works. A well-known semiconductor integrated circuit with programmable control parameters is used in this straightforward, inexpensive method.

关键词： Time-frequency analysis Renewable energy sources Costs Bridge circuits Switched reluctance motors Stability analysis Batteries Telecommunication computing Time-domain analysis Stress

来源：评论

学校读者我要写书评

暂无评论

Compensation Control of PMSMs Based on a High-order Sliding Mode Observer with Inertia Identification

引用

IEEE Journal of Emerging and Selected Topics in Power Electronics 2025年

作者： Li, Ke Ding, Jie Sun, Xiaodong Lei, Gang Dianov, Anton Demidova, Galina Prakht, Vladimir Jiangsu University School of Electrical and Information Engineering Zhenjiang212013 China Jiangsu University Automotive Engineering Research Institute Zhenjiang212013 China University of Technology Sydney School of Electrical and Data Engineering NSW2007 Australia Wenzhou University Pingyang Institute of Intelligent Manufacturing Wenzhou325035 China ITMO University Faculty of Control Systems and Robotics Petersburg197101 Russia Ural Federal University Department of Electrical Engineering Ekaterinburg620062 Russia

This article proposes a new sliding mode control (NSMC) reaching law to improve the speed tracking and anti-interference performance of permanent magnet synchronous motors (PMSMs). The NSMC improves the sliding mode control (SMC) in approaching speed and reducing chattering. Firstly, considering that the external load interference will adversely affect the control system, a high-order sliding mode observer (HOSMO) is designed to observe the load torque, and the observed value is compensated to the output of the speed controller. Then, combined with the Landau algorithm, a variable adaptive gain algorithm is introduced to decrease the impact of inertia mismatch on the system control performance. The algorithm identifies the rotational inertia online, reduces the effect of load disturbance on the identification performance, and updates the identification results to the observation in processors and controllers. Experimental results show that the proposed control method reduces the speed and current fluctuations of the system when load torque and inertia vary and improves the system's robustness. © 2013 IEEE.

关键词： Permanent magnets

来源：评论

学校读者我要写书评

暂无评论

Investigation of the Forced Oscillation in a VSG-based PV System

Investigation of the Forced Oscillation in a VSG-based PV Sy...

引用

IEEE PES Asia-Pacific Power and Energy engineering Conference (APPEEC)

作者： Zhen Gong Xiaorong Xie Chengxi Liu Lei Shang Fan Zhang Meng Li Department of Electrical Engineering Tsinghua University Beijing China School of Electrical Engineering and Automation Wuhan University Wuhan China State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid Guangzhou China

ISBN: (数字)9798350386127

ISBN: (纸本)9798350386134

The maximum power point tracking (MPPT) control in photovoltaic (PV) system will cause large amounts of inter-harmonics, which can lead to forced oscillation when the frequencies of inter-harmonics are close to the weak damping modes of PV system. Traditional researches focus on the relationship between harmonic source frequencies and weak damping modes, without fully considering the control effects of PV inverter on forced oscillation. This paper establishes the power input-output model of PV system using virtual synchronous generator (VSG) control, to facilitates the analysis of amplification effect of control dynamics on the power oscillations. Simulations verify the correctness of the proposed model, revealing that the control overshoot and power coupling characteristics of VSG have adverse effect on the forced oscillation magnitudes.

关键词： Maximum power point trackers Damping Couplings Solar irradiance Resonant frequency Resonance Synchronous generators Voltage control Oscillators Frequency control

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：