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学者姓名：李晓理
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摘要 ：
Evolutionary algorithms have proven to be extremely effective at tackling multi-objective opti-mization problems (MOPs). However, when dealing with many-objective optimization problems (MaOPs), their performance frequently degrades, especially when the Pareto marking irregular shapes. The population pressure to choose the Pareto optimal front and address the generaliz-ability of different Pareto front shapes becomes more challenging as the number of objectives increases. We present a strength Pareto evolutionary algorithm based on adaptive reference points (SPEA/ARP) to address this problem. First, the reference points are updated using current and historical population information. The angles between the current demographic information and the predefined uniform reference points are used to select the active reference points, and the adaptive reference points are selected from the historical population information projected onto the reference plane. Second, the fitness function values are applied to classify the environmental selection criteria into two categories: 1) The angle distance scaling function using adaptive reference points is utilized to increase selection pressure, and the diversity of non-dominated solutions is balanced using the angle-based secondary selection technique. 2) Otherwise, the fitness function values are employed to choose the next generation of non-dominated solutions. Third, an aggregate fitness r-value generated by the angle distance scaling function is employed to construct matching pools that produce valid offsprings. Finally, extensive experiments are carried out to demonstrate SPEA/ARP performance by comparing it with six state-of-the-art many -objective evolutionary algorithms on 5-, 10-, 15-objective of 31 benchmark MaOPs. The experi-ments show that SPEA/ARP outperforms the compared algorithms.
关键词 ：
Irregular fronts Irregular fronts Strength Pareto evolutionary algorithm Strength Pareto evolutionary algorithm Matching pool Matching pool Angle distance scaling function Angle distance scaling function Adaptive reference points Adaptive reference points
引用：
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| GB/T 7714 | Li, Xin , Li, Xiaoli , Wang, Kang et al. A strength pareto evolutionary algorithm based on adaptive reference points for solving irregular fronts [J]. | INFORMATION SCIENCES , 2023 , 626 : 658-693 . |
| MLA | Li, Xin et al. "A strength pareto evolutionary algorithm based on adaptive reference points for solving irregular fronts" . | INFORMATION SCIENCES 626 (2023) : 658-693 . |
| APA | Li, Xin , Li, Xiaoli , Wang, Kang , Yang, Shengxiang . A strength pareto evolutionary algorithm based on adaptive reference points for solving irregular fronts . | INFORMATION SCIENCES , 2023 , 626 , 658-693 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
The wet flue gas desulfurization (WFGD) process is a complex controlled system with nonlinear and time-varying characteristics. There are a variety of external disturbances in the desulfurization process, which can easily cause a jump in system parameters and even structure. In response to this problem, a model-free adaptive control scheme based on a switching mechanism is proposed, and the convergence analysis is given. In the scheme, firstly, the operating conditions of the WFGD system are divided into n kinds based on multiple external disturbances, and the mathematical models of the multi-input multi-output WFGD system under different operating conditions are established. Then the MFA controllers of the WFGD system under multiple operating conditions are established, respectively. Finally, a switching index function is designed to switch the controller of the WFGD system according to different operating conditions, so that the desulfurization system is always controlled by the most appropriate controller. In the simulation experiment, according to the actual data of the WFGD system of a 1000 MW coal-fired power station in Beijing, the modeling test and algorithm simulation of the WFGD system under three operating conditions are carried out. The simulation results show that this method can effectively reduce the transient error of the WFGD system output and improve the desulfurization effect.
关键词 ：
switching mechanism switching mechanism multiple operating conditions multiple operating conditions MIMO system MIMO system wet flue gas desulfurization wet flue gas desulfurization model-free adaptive control model-free adaptive control
引用：
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| GB/T 7714 | Liu, Jian , Li, Xiaoli , Wang, Kang . Model-free adaptive control based on switching mechanism for multi-input multi-output wet flue gas desulfurization system [J]. | INTERNATIONAL JOURNAL OF ADAPTIVE CONTROL AND SIGNAL PROCESSING , 2022 , 36 (11) : 2795-2822 . |
| MLA | Liu, Jian et al. "Model-free adaptive control based on switching mechanism for multi-input multi-output wet flue gas desulfurization system" . | INTERNATIONAL JOURNAL OF ADAPTIVE CONTROL AND SIGNAL PROCESSING 36 . 11 (2022) : 2795-2822 . |
| APA | Liu, Jian , Li, Xiaoli , Wang, Kang . Model-free adaptive control based on switching mechanism for multi-input multi-output wet flue gas desulfurization system . | INTERNATIONAL JOURNAL OF ADAPTIVE CONTROL AND SIGNAL PROCESSING , 2022 , 36 (11) , 2795-2822 . |
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摘要 ：
基于人工智能技术的重大活动食品安全与风险评估综述
关键词 ：
大型活动 大型活动 安全监管 安全监管 犯罪预防 犯罪预防 食品安全 食品安全 人工智能 人工智能 风险评估 风险评估
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| GB/T 7714 | 李晓理 , 卜坤 , 翟玉鹏 et al. 基于人工智能技术的重大活动食品安全与风险评估综述 [J]. | 李晓理 , 2021 , 47 (5) : 530-539 . |
| MLA | 李晓理 et al. "基于人工智能技术的重大活动食品安全与风险评估综述" . | 李晓理 47 . 5 (2021) : 530-539 . |
| APA | 李晓理 , 卜坤 , 翟玉鹏 , 王康 , 北京工业大学学报 . 基于人工智能技术的重大活动食品安全与风险评估综述 . | 李晓理 , 2021 , 47 (5) , 530-539 . |
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摘要 ：
随着中国国际地位的提高,举办大型活动日渐频繁.大型活动人员规模大、政治规格高、被社会大众广为关注等特点决定了其食品安全保障与传统食品监管有着不同的侧重点.为了更好地让人工智能技术服务于重大活动食品安全保障,从多个角度进行分析.首先,简要回顾传统食品安全监管行业的发展历史;其次,对现有的食品安全保障技术进行概括与总结,包含计算机视觉、物联网等人工智能技术;最后,根据重大活动的特点,基于现有犯罪预防与风险评估技术的应用现状,分析讨论重大活动食品安全风险评估技术的发展前景与困难.
关键词 ：
人工智能 人工智能 大型活动 大型活动 安全监管 安全监管 犯罪预防 犯罪预防 食品安全 食品安全 风险评估 风险评估
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | 李晓理 , 卜坤 , 翟玉鹏 et al. 基于人工智能技术的重大活动食品安全与风险评估综述 [J]. | 北京工业大学学报 , 2021 , 47 (05) : 530-539 . |
| MLA | 李晓理 et al. "基于人工智能技术的重大活动食品安全与风险评估综述" . | 北京工业大学学报 47 . 05 (2021) : 530-539 . |
| APA | 李晓理 , 卜坤 , 翟玉鹏 , 王康 . 基于人工智能技术的重大活动食品安全与风险评估综述 . | 北京工业大学学报 , 2021 , 47 (05) , 530-539 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
针对燃煤机组脱硝系统NOx被控对象存在大延迟、非线性的问题,综合考虑燃煤机组运行特性和脱硝系统工艺流程,对机理模型在变负荷过程中的特性进行分析和研究。以机理模型作为研究对象,通过BP神经网络建立脱硝系统出口NOx浓度的控制模型。将遗传算法(GA)和模型预测控制理论相结合,实现脱硝系统出口NOx浓度的神经网络模型预测控制。与传统的PID控制方法比较,所提方法具有更高的出口NOx浓度控制品质,降低了控制动态过程中的氨逃逸率。
关键词 ：
神经网络 神经网络 脱硝控制 脱硝控制 遗传算法 遗传算法 非线性 非线性 预测模型 预测模型
引用：
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| GB/T 7714 | 王富强 , 李晓理 , 于学斌 . 基于GA-BP预测控制的燃煤机组脱硝系统优化研究 [J]. | 控制工程 , 2021 , 28 (07) : 1490-1495 . |
| MLA | 王富强 et al. "基于GA-BP预测控制的燃煤机组脱硝系统优化研究" . | 控制工程 28 . 07 (2021) : 1490-1495 . |
| APA | 王富强 , 李晓理 , 于学斌 . 基于GA-BP预测控制的燃煤机组脱硝系统优化研究 . | 控制工程 , 2021 , 28 (07) , 1490-1495 . |
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摘要 ：
It is hoped that the robot could interact with the human when the robots help us in our daily lives. And understanding humans’ specific intention is the first crucial task for human-robot interaction. In this paper, we firstly develop a multi-task model for recognizing humans’ intention, which is composed of two sub-tasks: human action recognition and hand-held object identification. For the front subtask, an effective ST-GCN-LSTM model is proposed by fusing the Spatial Temporal Graph Convolutional Networks and Long Short Term Memory Networks. And for the second subtask, the YOLO v3 model is adopted for the hand-held object identification. Then, we build a framework for robot interacting with the human. Finally, these proposed models and the interacting framework are verified on several datasets and the testing results show the effectiveness of the proposed models and the framework. © 2020 Elsevier B.V.
关键词 ：
Palmprint recognition Palmprint recognition Human robot interaction Human robot interaction Convolutional neural networks Convolutional neural networks Long short-term memory Long short-term memory
引用：
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| GB/T 7714 | Liu, Chunfang , Li, Xiaoli , Li, Qing et al. Robot recognizing humans intention and interacting with humans based on a multi-task model combining ST-GCN-LSTM model and YOLO model [J]. | Neurocomputing , 2021 , 430 : 174-184 . |
| MLA | Liu, Chunfang et al. "Robot recognizing humans intention and interacting with humans based on a multi-task model combining ST-GCN-LSTM model and YOLO model" . | Neurocomputing 430 (2021) : 174-184 . |
| APA | Liu, Chunfang , Li, Xiaoli , Li, Qing , Xue, Yaxin , Liu, Huijun , Gao, Yize . Robot recognizing humans intention and interacting with humans based on a multi-task model combining ST-GCN-LSTM model and YOLO model . | Neurocomputing , 2021 , 430 , 174-184 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Compared to control bandwidth, low-frequency uncertainties or disturbances like step signals can be well rejected by many methods having two-degree-of-freedom (2-DOF). Due to robustness constraint, technically more challenging is the rejection of medium frequencies, especially for bandwidth-limited systems. Here, the equivalent-input-disturbance (EID) approach is extended to deal with the main medium-frequency oscillation of a pantograph-catenary system. First, a general EID estimator is developed with a low-frequency estimator as a special case. Then, a fair comparison is conducted to clarify the essential differences between the conventional 1-DOF-based and the developed 2-DOF-based control systems. Furthermore, a robust stability condition is derived for the 2-DOF-based closed-loop control system. A design algorithm together with design guidelines is provided, where the frequency characteristics of the uncertainties are utilized in the parameter design. Finally, simulations are carried out to validate the developed 2-DOF-based method for the pantograph-catenary system in realistic environment.
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| GB/T 7714 | Yu, Pan , Liu, Kang-Zhi , Li, Xiaoli et al. Robust control of pantograph-catenary system: Comparison of 1-DOF-based and 2-DOF-based control systems [J]. | IET CONTROL THEORY AND APPLICATIONS , 2021 , 15 (18) : 2258-2270 . |
| MLA | Yu, Pan et al. "Robust control of pantograph-catenary system: Comparison of 1-DOF-based and 2-DOF-based control systems" . | IET CONTROL THEORY AND APPLICATIONS 15 . 18 (2021) : 2258-2270 . |
| APA | Yu, Pan , Liu, Kang-Zhi , Li, Xiaoli , Yokoyama, Makoto . Robust control of pantograph-catenary system: Comparison of 1-DOF-based and 2-DOF-based control systems . | IET CONTROL THEORY AND APPLICATIONS , 2021 , 15 (18) , 2258-2270 . |
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摘要 ：
In the past two decades, multi-objective evolutionary algorithms (MOEAs) have achieved great success in solving two or three multi-objective optimization problems. As pointed out in some recent studies, however, MOEAs face many difficulties when dealing with many-objective optimization problems(MaOPs) on account of the loss of the selection pressure of the non-dominant candidate solutions toward the Pareto front and the ineffective design of the diversity maintenance mechanism. This paper proposes a many-objective evolutionary algorithm based on vector guidance. In this algorithm, the value of vector angle distance scaling(VADS) is applied to balance convergence and diversity in environmental selection. In addition, tournament selection based on the aggregate fitness value of VADS is applied to generate a high quality offspring population. Besides, we adopt an adaptive strategy to adjust the reference vector dynamically according to the scales of the objective functions. Finally, the performance of the proposed algorithm is compared with five state-of-the-art many-objective evolutionary algorithms on 52 instances of 13 MaOPs with diverse characteristics. Experimental results show that the proposed algorithm performs competitively when dealing many-objective with different types of Pareto front. © 2021 - IOS Press. All rights reserved.
关键词 ：
Multiobjective optimization Multiobjective optimization Evolutionary algorithms Evolutionary algorithms Vectors Vectors
引用：
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| GB/T 7714 | Li, Xin , Li, Xiaoli , Wang, Kang . A many-objective evolutionary algorithm based on vector angle distance scaling [J]. | Journal of Intelligent and Fuzzy Systems , 2021 , 40 (5) : 10285-10306 . |
| MLA | Li, Xin et al. "A many-objective evolutionary algorithm based on vector angle distance scaling" . | Journal of Intelligent and Fuzzy Systems 40 . 5 (2021) : 10285-10306 . |
| APA | Li, Xin , Li, Xiaoli , Wang, Kang . A many-objective evolutionary algorithm based on vector angle distance scaling . | Journal of Intelligent and Fuzzy Systems , 2021 , 40 (5) , 10285-10306 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
The control method based on the equivalent-input-disturbance (EID) estimator and the Luenberger state observer has received much attention in recent years. However, the property of EID-based control systems is still not well investigated. A number of design procedures were proposed but lacked sufficient theoretic justification. In this article, the two-degree-of-freedom nature of an EID-based control system is revealed. Specifically, the reference-tracking is determined by an outer loop, while the disturbance rejection and robustness is determined by an inner loop consisting of the EID estimator and state observer. The bandwidth constraints on the inner loop are analyzed for plants having zeros or poles in the open right-half plane by using the Bode and the Poisson integral formulas. These analyses provide a theoretic justification for conventional design procedures. Further, a coordinated design algorithm is provided for the EID-based uncertain control systems. In addition, a comprehensive comparison of the EID-based and the disturbance observer (DOB) based control systems is conducted in the system design aspect. Lastly, comparative studies of the EID-based and DOB-based control methods are given for various types of plants to validate the developed design algorithm.
关键词 ：
disturbance estimation disturbance estimation robustness robustness bandwidth constraint bandwidth constraint disturbance observer disturbance observer equivalent input disturbance equivalent input disturbance
引用：
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| GB/T 7714 | Yu, Pan , Liu, Kang-Zhi , Liu, Xudong et al. Analysis of equivalent-input-disturbance-based control systems and a coordinated design algorithm for uncertain systems [J]. | INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL , 2021 , 31 (5) : 1755-1773 . |
| MLA | Yu, Pan et al. "Analysis of equivalent-input-disturbance-based control systems and a coordinated design algorithm for uncertain systems" . | INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL 31 . 5 (2021) : 1755-1773 . |
| APA | Yu, Pan , Liu, Kang-Zhi , Liu, Xudong , Li, Xiaoli , Wu, Min , She, Jinhua . Analysis of equivalent-input-disturbance-based control systems and a coordinated design algorithm for uncertain systems . | INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL , 2021 , 31 (5) , 1755-1773 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
This article is concerned with the exponential stability and l(1)-gain performance analysis of discrete-time switched positive systems (DTSPSs) under mode-dependent average dwell time (MDADT) switching. A novel linear copositive Lyapunov function, which is both quasi-time-dependent and mode-dependent, is designed for the stability and performance analysis. Stability conditions are developed such that the considered DTSPS is exponentially stable and also attains an attenuation performance. The solved conditions for the controllers design are presented in terms of linear programming (LP), and are both quasi-time-dependent and mode-dependent. Two examples are organized to validate the effectiveness of the proposed scheme finally.
关键词 ：
quasi-time-dependent quasi-time-dependent switched positive systems (SPSs) switched positive systems (SPSs) l(1)-gain l(1)-gain Controller synthesis Controller synthesis
引用：
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| GB/T 7714 | Li, Xiaoli , Du, Sheng-Li , Zhao, Xudong . Stability and l(1)-Gain Analysis for Switched Positive Systems With MDADT Based on Quasi-Time-Dependent Approach [J]. | IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS , 2021 , 51 (9) : 5846-5854 . |
| MLA | Li, Xiaoli et al. "Stability and l(1)-Gain Analysis for Switched Positive Systems With MDADT Based on Quasi-Time-Dependent Approach" . | IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS 51 . 9 (2021) : 5846-5854 . |
| APA | Li, Xiaoli , Du, Sheng-Li , Zhao, Xudong . Stability and l(1)-Gain Analysis for Switched Positive Systems With MDADT Based on Quasi-Time-Dependent Approach . | IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS , 2021 , 51 (9) , 5846-5854 . |
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