检索结果-内蒙古大学图书馆

Event-triggered predefined-time control for full-state constrained nonlinear systems: A novel command filtering error compensation method

引用

Science China(Technological Sciences) 2024年第9期67卷 2867-2880页

作者： PAN YingNan CHEN YiLin LIANG HongJing College of Control Science and Engineering Bohai UniversityJinzhou 121013China School of Automation Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Laboratory of Electromagnetic Space Cognition and Intelligent Control Beijing 100089China

In this paper, a command filter-based adaptive fuzzy predefined-time event-triggered tracking control problem is investigated for uncertain nonlinear systems with time-varying full-state constraints. By designing a sliding mode differentiator, the inherent computational complexity problem within the predefined-time backstepping framework is solved. Different from the existing command filter-based finite-time and fixed-time control strategies that the convergence time of the filtering error is adjusted through the system initial value or numerous parameters, a novel command filtering error compensation method is presented,which tunes one control parameter to make the filtering error converge in the predefined time, thereby reducing the complexity of design and analysis of processing the filtering error. Then, an improved event-triggered mechanism(ETM) that builds upon the switching threshold strategy, in which an inverse cotangent function is designed to replace the residual term of the ETM,is proposed to gradually release the controller's dependence on the residual term with increasing time. Furthermore, a tan-type nonlinear mapping technique is applied to tackle the time-varying full-state constraints problem. By the predefined-time stability theory, all signals in the uncertain nonlinear systems exhibit predefined-time stability. Finally, the feasibility of the proposed algorithm is substantiated through two simulation results.

关键词： predefined-time control command filtering error compensation method event-triggered mechanism time-varying full-state constraints uncertain nonlinear systems

来源：评论

学校读者我要写书评

暂无评论

Flake channels construction of hydroxyapatite/gelatin cryogel with excellent flame retardant properties for enhancing the capturing of iodine

引用

Collagen and Leather 2024年第1期5卷 101-112页

作者： Yanxia Wei Bo Wang Liyan Cao Xin Cheng Yuhan Qiao Tao Duan Guiqiang He Pingping Ding Yan Zhou Jian Zhou Engineering Research Center of Biomass Materials School of Life Science and EngineeringMinistry of EducationSouthwest University of Science and TechnologyMianyang 621010SichuanPeople's Republic of China The Collelge of Nuclear Technology and Automation Engineering Chengdu University of TechnologyChengdu 610059SichuanPeople's Republic of China NHC Key Laboratory of Nuclear Technology Medical Transformation Mianyang Central HospitalMianyang 621000SichuanPeople's Republic of China

Safe and efficient capturing of volatile radioiodine is of extremely important significance in the treatment of spent ***,the flake channels in gelatin-hydroxyapatite(HAP@Ge)cryogel with excellent flame retardant properties were constructed by immobilizing hydroxyapatite nanorods(HAP)on Gelatin(Ge)cryogel for enhancing the capturing of *** immobilization of HAP nanorods enhanced thermal stability,provided low rates of dynamic heat transfer and dissipation,and remarkably improved the flame retardant and smoke suppression properties of the Ge cryogel,which can effectively prevent the occurrence of safety incidents caused by further thermal degradation or combustion of this *** importantly,it was effective in improving the rapid enrichment of iodine,resulting in a high adsorption *** maximum adsorption capacity of HAP@Ge cryogel for iodine vapor reached 2693 mg/g at *** high adsorption capacity for iodine was attributed to the multi-scale porous structure in HAP@Ge cryogel,which offered effective channels for iodine diffusion,whereas the numerous complex and irregular flakes provided sufficient number of active sites for iodine *** adsorption process was chemical in nature and involved the-PO_(4)^(3-),-OH,-C=O,and-NHR groups on HAP@Ge ***,the complex porous structure of HAP@Ge cryogel enhanced the physical capturing of *** advantages,such as low-cost raw material,simple preparation method,good flame retardancy,and excellent capturing performance for iodine indicated that HAP@Ge cryogel is a potential candidate for the removal of radioactive iodine in the exhaust gas stream of post-treatment plants.

关键词： Gelatin Hydroxyapatite nanorod Flake channel Flame retardancy Iodine capture

来源：评论

学校读者我要写书评

暂无评论

Verification of a self-developed CFD-based multi-physics coupled code MPC-LBE for LBE-cooled reactor

引用

nuclear Science and Techniques 2021年第5期32卷 84-100页

作者： Zhi-Xing Gu Qing-Xian Zhang Yi Gu Liang-Quan Ge Guo-Qiang Zeng Mu-Hao Zhang Bao-Jie Nie College of Nuclear Technology and Automation Engineering Chengdu University of TechnologyChengdu 610059China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China

To perform an integral simulation of a pool-type reactor using CFD code,a multi-physics coupled code MPC-LBE for an LBE-cooled reactor was proposed by integrating a point kinetics model and a fuel pin heat transfer model into self-developed CFD *** code verification,a code-to-code comparison was employed to validate the CFD ***,a typical BT transient benchmark on the LBE-cooled XADS reactor was selected for verification in terms of the integral or system *** on the verification results,it was demonstrated that the MPC-LBE coupled code can perform thermal-hydraulics or safety analyses for analysis for processes involved in LBE-cooled pool-type reactors.

关键词： LBE-cooled pool-type reactor Computational fluid dynamics Multi-physics coupling code Safety analysis code Verification

来源：评论

学校读者我要写书评

暂无评论

Research on Performance Computer Evaluation Model of Low-Temperature Protective Clothing Based on Explicit Difference Method 2

Research on Performance Computer Evaluation Model of Low-Tem...

引用

2nd IEEE International Conference on Data Science and Computer Application, ICDSCA 2022

作者： Deng, Hui Sun, Yiqing The College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu Sichuan610059 China

ISBN: (数字)9781665472005

ISBN: (纸本)9781665472005

At present, the research institute has developed a three-layer low-temperature protection composite material. Low-temperature protective materials are mainly used for short-term low-temperature protection, effectively reducing the harm of the external environment to the human body. In this paper, considering that the heat release capacity of the phase change layer is different at different temperatures, according to the data of heat release capacity and temperature of protective materials, the change of heat release capacity Q and field temperature T is fitted by Fourier function, and the functional relationship of material heat release is obtained. Therefore, the model is divided into three stages and calculated separately. In the first stage, there is no self-heating or internal heat source in the three-layer materials, so according to the law of conservation of energy and Fourier law, the unsteady heat conduction formula is deduced and solved. In the second stage, the phase change layer begins to release heat, and the first stage model is added to each layer's heat conduction control equation with heat release capability. The third stage is similar to the first stage. With the help of the explicit difference method, the model is discretized, and the cooling model of materials is solved to effectively evaluate the protective ability of low-temperature protective composites. © 2022 IEEE.

关键词： Phase change materials

来源：评论

学校读者我要写书评

暂无评论

Automated Production Line Control System based on Industrial Cloud Platform

Automated Production Line Control System based on Industrial...

引用

2022 International Conference on Intelligent Manufacturing and Industrial automation, CIMIA 2022

作者： Liu, JianQin Li, LinLin Qu, Tao He, HuiDong The College of Nuclear Technology and Automation Engineering Chengdu University of Technology Sichuan Chengdu610059 China

ISBN: (纸本)9781510655966

With the rapid development of modern industry, enterprises have an increasing demand for data monitoring and automated control of multiple production outlets and production lines. This paper first analyses the structure of the production line, completes the control system model design, establishes the network framework of the system, designs the human-machine interaction interface, gives the SFC flow chart of the workstations and the communication scheme of the PLC between each station, and finally realises the real-time interaction of the monitoring data in the industrial cloud platform. The research contributes new ideas to related research in this field. © 2022 SPIE.

关键词： Control systems

来源：评论

学校读者我要写书评

暂无评论

Application of X-ray fluorescence technology in lithology discrimination

Application of X-ray fluorescence technology in lithology di...

引用

2023 International Conference on Computer Application and Information Security, ICCAIS 2023

作者： Liu, Guili Zhai, Juan Zhang, Wei Lai, Wanchang Zhao, Ziqi Li, Wen Wang, Guangxi Yang, Qiang Chen, Ran College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu610059 China Chengdu Institute of Product Quality Inspection Co. Ltd. Sichuan Chengdu610100 China Chengdu Zhongfu Technology Co. Ltd. Sichuan Chengdu610100 China

ISBN: (纸本)9781510675032

X-ray fluorescence data are not only an important indicator in petroleum exploration, but they are also an advantage in lithology discrimination. From the perspective of the application of nuclear technology in drilling and exploration, in this paper, the X-ray fluorescence count rate of the core is used as the basic data for core logging, and the geology and multivariate statistical data are analyzed to analyze the lithology of the core. X-ray fluorescence analysis can provide the fluorescence count rates of 35 elements in a core sample. If there are n core samples, an n*35 matrix can be created. If 35 types of fluorescence count rates are used as the independent variables to directly identify the lithology, the dataset is very large, and some of the independent variables are not strongly correlated. Therefore, the discrimination effect is insufficient for achieving the purpose. Therefore, based on the diagenetic characteristics of sedimentary rocks and the main rock-forming elements and using multivariate statistical methods, in this paper, the count rates of five elements (i.e., Si, Fe, Al, K, and Ca) are selected as independent variables for the lithology discrimination. It is reasonably transformed to obtain the matrix coefficients before dimensionality reduction. The original five-dimensional dataset is reduced to two dimensions using matrix coefficients. Then, Fisher's discriminant method is applied to the dimensionally reduced data to discriminate and classify the lithology. Based on the discrimination results, the X-ray fluorescence count rate and mathematical statistics can be used to obtain a good effect in lithology discrimination. © 2024 SPIE.

关键词： Lithology

来源：评论

学校读者我要写书评

暂无评论

A PSEUDO-RANDOM SIGNAL GENERATOR BASED ON 3D DISCRETE MEMRISTOR CHAOTIC MAP 10

A PSEUDO-RANDOM SIGNAL GENERATOR BASED ON 3D DISCRETE MEMRIS...

引用

10th International Symposium on Test automation and Instrumentation, ISTAI 2024

作者： Qian, Lei Shi, Wei Guo, Yuchuan Chen, Kai Xu, Bo Zhao, Jia College of Automation Engineering University of Electronic Science and Technology of China Chengdu China College of Big Health & Intelligent Engineering Chengdu Medical College of China Chengdu China

ISBN: (纸本)9781837242672

Pseudo-random number generators that can quickly generate noise-like noise have high value in engineering applications. However, the methods currently used in many signal generators do not produce noise with enough randomness to satisfy engineering applications. Based on the properties possessed by the memristor, a novel method is proposed in this paper. A 3D discrete memristor model is constructed by coupling the discrete memristor to a discrete system, and its complex dynamical behavior, which depends on the system parameters and initial values, is analyzed. The results show that the 3D-DM exhibits hyperchaotic behavior. An experimental platform was built using FPGA and DAC, and the phase-trajectory diagrams obtained using oscilloscope capture are highly similar to the simulation results, which proves the feasibility of realizing 3D-DM using digital hardware circuits. Finally, a pseudo-random number generator is designed with a hardware operation speed of 350 Mps. The proposed method outperforms the existing methods. © The Institution of engineering & technology 2024.

关键词： Random number generation

来源：评论

学校读者我要写书评

暂无评论

STSR: An Efficient Model for Super-Resolution Reconstruction

STSR: An Efficient Model for Super-Resolution Reconstruction

引用

Consumer Electronics and Computer engineering (ICCECE), 2021 IEEE International Conference on

作者： Xinhui Liu College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China

ISBN: (数字)9798331533113

ISBN: (纸本)9798331533120

STSR is an efficient and lightweight super-resolution model built upon the Swin Transformer architecture. By utilizing the hierarchical window-based self-attention mechanism of the Swin Transformer, STSR effectively captures global contextual information while ensuring high computational efficiency. To further enhance its performance and reduce model complexity, we incorporate lightweight design elements and residual structures. These improvements not only facilitate better gradient flow but also significantly boost the recovery of high-frequency details. Experimental results on the DIV2K dataset show that STSR delivers exceptional performance, significantly reducing both parameter count and computational costs.

关键词： Computational modeling Superresolution Computer architecture Transformers Computational efficiency Complexity theory Image reconstruction Consumer electronics

来源：评论

学校读者我要写书评

暂无评论

A Wristband Design for a Water Rescue System

A Wristband Design for a Water Rescue System

引用

2023 IEEE International Conference on Electrical, automation and Computer engineering, ICEACE 2023

作者： Qiu, Quan Wang, Ming Tuo, Haitao Wu, Shannan Bai, Xiao Wang, Fan Yang, Qingru Liu, Fengxian Lu, Huijie College of Mechanical and Electrical Engineering Chengdu University of Technology Chengdu China College of Mechatronic Engineering and Automation Shanghai University Shanghai China Chengdu University of Technology Chengdu China

ISBN: (纸本)9798350309614

In recent years, at least 236,000 people die from drowning every year in the world, but the corresponding water rescue equipment is backward. In response to the above problems, this paper fully investigates the UCD (User-Centered Design) theory, applies the UCD theory to the product design framework of a water rescue system. And from theoretical assumptions to actual research and development, from the bracelet early warning to the rescue robot launching, it is committed to promoting the emergency product system design for water rescue. When the bracelet detects that the body temperature, heart rate and humidity are in an abnormal situation, the airbag of the 'Life Capsule' bracelet inflates to carry out preliminary self-rescue, while the bracelet sends relevant positioning information to the 'Black Box', which interacts with the bracelet and the 'Black Box' through the interaction with the 'Black Box'. The 'black box' interacts with the bracelet to obtain GPS data combined with inertial navigation algorithms to get the user's position estimate, and then sends the user's position to the early warning center, which receives the user's position and then sends out the surface rescue robot for rescue. This paper mainly focuses on the design of the bracelet of this system and its communication interaction with other parts. © 2023 IEEE.

关键词： black box devices bracelet design rescue robots UCD water rescue

来源：评论

学校读者我要写书评

暂无评论

Design of Real-Time Vibration Environment Parameter Acquisition System 16

Design of Real-Time Vibration Environment Parameter Acquisit...

引用

16th IEEE International Conference on Electronic Measurement and Instruments, ICEMI 2023

作者： Chen, Jiahe Di, Lingsong Chengdu University of Technology School of Nuclear Technology and Automation Engineering Sichuan Chengdu China Unit 94259 Shandong Yantai China

ISBN: (纸本)9798350327144

In order to monitor the vibration of environmental parameters during equipment transportation and storage, a real-time monitoring environmental vibration parameters acquisition system is designed. The system adopts the structural design of separation of sensor and main equipment, and supports the collection and storage of up to 8 three-axis vibration data at the same time, so as to realize the monitoring, recording, and analysis of environmental vibration status. Through the shaker test and the field test of large vessels, it is verified that the system can monitor the vibration component of the three axes in the environment in real-time, and the equipment can operate stably and reliably and has the advantages of high real-time performance and high sensitivity. © 2023 IEEE.

关键词： Structural design

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：