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Customizable multifunctional metasurface absorber based on bidirectional deep neural networks covering the quasi-entire terahertz band

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Chinese Optics Letters 2024年第6期22卷 182-190页

作者： Zhipeng Ding Wei Su Lipeng’an Ye Yuanhang Zhou Wenlong Li Riaz Ali Bin Tang Hongbing yao College of Mechanics and Engineering Science Hohai UniversityNanjing 211100China School of Microelectronics and Control Engineering Changzhou UniversityChangzhou 213164China

In this work, we propose a novel approach that combines a bidirectional deep neural network(BDNN) with a multifunctional metasurface absorber(MMA) for inverse design, which can effectively address the challenge of on-demand customization for absorbers. The inverse design of absorption peak frequencies can be achieved from 0.5 to 10 terahertz(THz), covering the quasi-entire THz band. Based on this, the BDNN is extended to broadband absorption, and the inverse design yields an MMA at the desired frequency. This work provides a broadly applicable approach to the custom design of multifunctional devices that can facilitate the evaluation and design of metasurfaces in electromagnetic absorption.

关键词： terahertz inverse design bidirectional deep neural network metasurface

Field Load Test Based SHM System Safety Standard Determination for Rigid Frame Bridge

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Structural Durability & Health Monitoring 2024年第3期18卷 361-376页

作者： Xilong Zheng Qiong wang Di Guan School of Civil and Architectural Engineering Harbin UniversityHarbin150076China

The deteriorated continuous rigid frame bridge is strengthened by external prestressing. Static loading tests wereconducted before and after the bridge rehabilitation to verify the effectiveness of the rehabilitation process. Thestiffness of the repaired bridge is improved, and the maximum deflection of the load test is reduced from 37.9 to27.6 mm. A bridge health monitoring system is installed after the bridge is reinforced. To achieve an easy assessmentof the bridge’s safety status by directly using transferred data, a real-time safety warning system is createdbased on a five-level safety standard. The threshold for each safety level will be determined by theoretical calculationsand the outcomes of static loading tests. The highest risk threshold will be set at the ultimate limit statevalue. The remaining levels, namely middle risk, low risk, and very low risk, will be determined usingreduction coefficients of 0.95, 0.9, and 0.8, respectively.

关键词： Continuous rigid frame bridge rehabilitation long-term monitoring field load test safety standard determination

A Path Planning Algorithm Based on Improved RRT Sampling Region

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Computers, Materials & Continua 2024年第9期80卷 4303-4323页

作者： Xiangkui Jiang Zihao wang Chao Dong College of Automation Xi’an University of Posts and TelecommunicationsXi’an710121China

For the problem of slow search and tortuous paths in the Rapidly Exploring Random Tree(RRT)algorithm,a feedback-biased sampling RRT,called FS-RRT,is proposedbasedon ***,toimprove the samplingefficiency of RRT to shorten the search time,the search area of the randomtree is restricted to improve the sampling ***,to obtain better information about obstacles to shorten the path length,a feedback-biased sampling strategy is used instead of the traditional random sampling,the collision of the expanding node with an obstacle generates feedback information so that the next expanding node avoids expanding within a specific angle ***,this paper proposes using the inverse optimization strategy to remove redundancy points from the initial path,making the path shorter and more ***,to satisfy the smooth operation of the robot in practice,auxiliary points are used to optimize the cubic Bezier curve to avoid path-crossing obstacles when using the Bezier curve *** experimental results demonstrate that,compared to the traditional RRT algorithm,the proposed FS-RRT algorithm performs favorably against mainstream algorithms regarding running time,number of search iterations,and path ***,the improved algorithm also performs well in a narrow obstacle environment,and its effectiveness is further confirmed by experimental verification.

关键词： RRT inversive optimization path planning feedback bias sampling mobile robots

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补肾养血方治疗老年膝关节骨关节炎的效果

时珍国医国药 2024年第7期35卷 1660-1663页

作者：朱康王晓桐尹金旺北京市昌平区中医医院北京102200

目的观察补肾养血方加减治疗老年膝关节骨关节炎(KOA)的效果。方法选取该院2019年10月至2022年12月收治的106例老年中重度KOA患者为研究对象,根据用药方案分为两组。两组均给予关节镜下清理治疗,对照组术后24h在关节腔内注射玻璃酸钠治... 详细信息

目的观察补肾养血方加减治疗老年膝关节骨关节炎(KOA)的效果。方法选取该院2019年10月至2022年12月收治的106例老年中重度KOA患者为研究对象,根据用药方案分为两组。两组均给予关节镜下清理治疗,对照组术后24h在关节腔内注射玻璃酸钠治疗。养血方组在对照组基础上给予补肾养血方加减治疗,比较两组治疗效果。结果与治疗前比较,两组膝关节伸直活动度治疗后下降,膝关节屈曲活动度治疗后升高,但治疗后无统计学差异(P>0.05)。与治疗前比较,两组血清白细胞介素-17(IL-17)、肿瘤坏死因子-α(TNF-α)、CC趋化因子配体18(CCL18)治疗后下降,且养血方组低于对照组(P0.05)。结论补肾养血方加减治疗老年中重度KOA可促进炎症的吸收,改善膝关节活动度,促进膝关节功能恢复。

关键词：补肾养血方关节镜膝关节骨关节炎膝关节功能膝关节活动度

Towards an efficient variational quantum algorithm for solving linear equations

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Communications in Theoretical Physics 2024年第11期 56-67页

作者： Wen Shan Xu Ri-Gui Zhou yao Chong Li Xiao Xue Zhang College of Information Engineering Shanghai Maritime University Research Center of Intelligent Information Processing and Quantum Intelligent Computing

Variational quantum algorithms are promising methods with the greatest potential to achieve quantum advantage, widely employed in the era of noisy intermediate-scale quantum *** study presents an advanced variational hybrid algorithm(EVQLSE) that leverages both quantum and classical computing paradigms to address the solution of linear equation ***, an innovative loss function is proposed, drawing inspiration from the similarity measure between two quantum states. This function exhibits a substantial improvement in computational complexity when benchmarked against the variational quantum linear solver. Subsequently, a specialized parameterized quantum circuit structure is presented for small-scale linear systems,which exhibits powerful expressive capabilities. Through rigorous numerical analysis, the expressiveness of this circuit structure is quantitatively assessed using a variational quantum regression algorithm, and it obtained the best score compared to the others. Moreover, the expansion in system size is accompanied by an increase in the number of parameters, placing considerable strain on the training process for the algorithm. To address this challenge, an optimization strategy known as quantum parameter sharing is introduced, which proficiently minimizes parameter volume while adhering to exacting precision standards. Finally, EVQLSE is successfully implemented on a quantum computing platform provided by IBM for the resolution of large-scale problems characterized by a dimensionality of 220.

关键词：

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基于双阶段搜索的约束进化多任务优化算法

计算机应用 2024年第5期44卷 1415-1422页

作者：赵楷文王鹏童向荣烟台大学计算机与控制工程学院山东烟台264005

高效地平衡算法的多样性、收敛性和可行性是求解约束多目标优化问题(CMOP)的关键;然而,复杂约束的出现给该类问题的求解带来了更大的挑战。因此,提出一种基于双阶段搜索的约束进化多任务优化算法(TEMA),通过完成两个协同进化的任务实现... 详细信息

高效地平衡算法的多样性、收敛性和可行性是求解约束多目标优化问题(CMOP)的关键;然而,复杂约束的出现给该类问题的求解带来了更大的挑战。因此,提出一种基于双阶段搜索的约束进化多任务优化算法(TEMA),通过完成两个协同进化的任务实现多样性、收敛性和可行性之间的平衡。首先,进化过程由探索和利用两个阶段组成,分别致力于加强算法在目标空间的广泛探索能力和高效搜索能力;其次,设计一种动态约束处理策略以平衡种群中可行解的比例,从而增强算法在可行区域的探索能力;再次,提出一种回退搜索策略,利用无约束Pareto前沿所包含的信息指导算法向约束Pareto前沿快速收敛;最后,在两个基准测试集中的23个问题上进行对比实验。实验结果表明,TEMA分别在14个和13个测试问题上取得最优反世代距离(IGD)值和超体积(HV)值,体现出明显优势。

关键词：约束多目标优化问题进化多任务优化算法双阶段进化机制进化算法约束处理技术

Emergency management capacity assessment for urban rail transit-an example of Beijing Metro Line 13

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Transportation Safety and Environment 2024年第1期6卷 109-115页

作者： Jiao Liu Yun Qi Wei wang School of Emergency Management and Safety Engineering China University of Mining&Technology(Beijing)Beijing 100083China China Safety Science Journal Editorial Department China Occupational Safety and Health AssociationBeijing 100011China College of mechanical engineering and automation Liaoning University of TechnologyJinzhou 121001LiaoningChina

In order to improve the emergency management capability of urban rail transit system and reduce accidents during metro operation,an emergency management capability evaluation method combining analytic hierarchy process(AHP)and technique for order preference by similarity to ideal solution(TOPSIS)is *** on the Prevention Preparation Response Recovery(PPRR)model,factors influencing the emergency management capability of the urban rail transit system are summarized from the perspective of‘human,machine,environment and management’.Then,an emergency management capability evaluation index system containing of 20 secondary indicators is constructed in four stages:emergency prevention,emergency preparation,emergency response and emergency *** weights of indicators are calculated using the AHP method,and the closeness of each indicator to the optimal solution is analysed with the TOPSIS ***,take the Beijing Metro Line 13 as an example to investigate the level of emergency management capability of urban rail *** results show that the emergency management capability of Beijing’s urban rail transit system is‘well’,among which hazard prevention measures(0.31)and emergency response team(0.34)have a greater weight on the emergency management capability of rail *** model can more accurately assess the emergency management capability of urban rail transit and provide a basis for emergency management.

关键词： urban rail transit emergency management capability analytic hierarchy process(AHP) technique for order preference by similarity to ideal solution(TOPSIS) prevention preparation response recovery(PPRR)model

The differential effects of integrase strand transfer inhibitors and efavirenz on neuropsychiatric conditions and brain imaging in HIV-positive men who have sex with men

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Biosafety and Health 2024年第4期6卷 216-224页

作者： Yihui He Yang Zhang Jiaxin Zhen Guangqiang Sun Zhen Li Bo Yang Bin Yang Keyi Chang Xue Chen Yulin Zhang Caiping Guo Wen wang Ping Wu tong Zhang Lei wang Postgraduate Union Training Base of Jinzhou Medical University PLA Rocket Force Characteristic Medical CenterBeijing 100088China Department of Neurology PLA Rocket Force Characteristic Medical CenterBeijing 100088China Center for Infectious Disease Beijing Youan HospitalCapital Medical UniversityBeijing 100069China Beijing Key Laboratory for HIV/AIDS Research Beijing 100069China Beijing Institute for Sexually Transmitted Disease Control Beijing 100069China Beijing Key Laboratory of Mental Disorders National Clinical Research Center for Mental Disorders and National Center for Mental DisordersBeijing Anding HospitalCapital Medical UniversityBeijing 100088China Advanced Innovation Center for Human Brain Protection Capital Medical UniversityBeijing 100069China The Second Hospital of Beijing Beijing 100031China Department of Respiratory and Critical Care Medicine Beijing Youan HospitalCapital Medical UniversityBeijing 100069China National Institute on Drug Dependence and Beijing Key Laboratory of Drug Dependence Peking UniversityBeijing 100191China Key Discipline for Neuroscience of the Ministry of Education Department of NeurobiologySchool of Basic Medical SciencesPeking University Health Science CenterBeijing 100191China

Integrase strand transfer inhibitors(INSTIs)have emerged as the first‐line choice for treating human immunodeficiency virus(HIV)infection due to their superior efficacy and ***,the impact of INSTIs on the development of neuropsychiatric conditions in people living with HIV(PLWH)is not fully understood due to limited *** this study,we conducted a cross‐sectional examination of PLWH receiving antiretroviral therapy,with a specific focus on HIV‐positive men who have sex with men(MSM)on INSTI‐based regimens(n=61)and efavirenz(EFV)‐based regimens(n=28).Participants underwent comprehensive neuropsychiatric evaluations and multimodal magnetic resonance imaging(MRI)scans,including T1‐weighted images and resting‐state functional *** to the EFV group,the INSTI group exhibited primarily reduced gray matter volume(GMV)in the right superior parietal gyrus,higher regional homogeneity(ReHo)in the left postcentral gyrus,lower ReHo in the right orbital part of the inferior frontal gyrus,and increased voxel‐wise functional connectivity for the seed region in the left inferior temporal gyrus with clusters in the right ***,the analysis revealed a main effect of antiretroviral drugs on GMV changes,but no main effect of neuropsychiatric disorders or their *** repeated analysis of participants who did not switch regimens confirmed the GMV changes in the INSTI group,validating the initial *** study demonstrated gray matter atrophy and functional brain changes in PLWH on INSTI‐based regimens compared to those on EFV‐based *** neuroimaging results provide valuable insights into the characteristics of brain network modifications in PLWH receiving INSTI‐based regimens。

关键词： Human immunodeficiency virus(HIV) Multimodal magnetic resonance imaging(MRI) Integrase strand transfer inhibitors(INSTIs) Efavirenz(EFV)

Graph neural network based method for robot path planning

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Biomimetic Intelligence & Robotics 2024年第1期4卷 80-87页

作者： Xingrong Diao Wenzheng Chi Jiankun wang Shenzhen Key Laboratory of Robotics Perception and Intelligence Department of Electronic and Electrical EngineeringSouthern University of Science and TechnologyShenzhen 518055China Robotics and Microsystems Center School of Mechanical and Electric EngineeringSoochow UniversitySuzhou 215021China Jiaxing Research Institute Southern University of Science and TechnologyJiaxing 314000China

Sampling-based path planning is widely used in robotics,particularly in high-dimensional state *** the path planning process,collision detection is the most time-consuming ***,we propose a learning-based path planning method that reduces the number of collision *** develop an efficient neural network model based on graph neural *** model outputs weights for each neighbor based on the obstacle,searched path,and random geometric graph,which are used to guide the planner in avoiding *** evaluate the efficiency of the proposed path planning method through simulated random worlds and real-world *** results demonstrate that the proposed method significantly reduces the number of collision checks and improves the path planning speed in high-dimensional environments.

关键词： Graph Neural Network(GNN) Collision detection Sampling-based path planning