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采用改进多目标粒子群算法的斜拉桥阻尼器参数优化

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振动工程学报 2024年第6期37卷 1006-1014页

作者：许莉李煜民丁自豪刘耿耿刘康贾宏宇福州大学土木工程学院福建福州350116 西南交通大学土木工程学院四川成都610031 福州大学计算机与大数据学院福建福州350116

为克服大跨度斜拉桥黏滞阻尼器优化设计效率低、多个相互制约的减震控制目标的问题难以权衡,基于遗传算法的“变异”方法,提出了改进多目标粒子群算法来进行阻尼器参数优化设计。建立大跨度斜拉桥的有限元模型,开展了全桥地震响应分析,... 详细信息

为克服大跨度斜拉桥黏滞阻尼器优化设计效率低、多个相互制约的减震控制目标的问题难以权衡,基于遗传算法的“变异”方法,提出了改进多目标粒子群算法来进行阻尼器参数优化设计。建立大跨度斜拉桥的有限元模型,开展了全桥地震响应分析,根据抗震需求在桥梁纵向设置黏滞阻尼器;分别建立了塔底弯矩、阻尼力和梁端位移的减震响应与阻尼器参数之间的响应面数学模型;以减震响应面模型为研究对象,通过该算法进行阻尼器参数全局自动寻优分析,确定了阻尼器的最优参数,并与采用参数敏感性分析方法确定的一组阻尼参数进行对比分析。研究结果表明:该优化方法具有计算精度好、优化效率高和更好地权衡多个相互制约的减震控制目标的优点;通过优化算法获得的阻尼器参数组合相比采用参数敏感性分析方法获得的阻尼参数组合的减震响应,塔底弯矩增大1.73%,阻尼力减小5.97%,梁端位移减小1.66%;在无需多次有限元试算的基础上确定了更高精度的阻尼器优化参数组合,在提高减震效果的同时大大提升了计算效率。

关键词：桥梁工程黏滞阻尼器改进粒子群算法斜拉桥响应面法多目标优化

Multi-Task Visual Semantic Embedding Network for Image-Text Retrieval

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Journal of Computer Science & Technology 2024年第4期39卷 811-826页

作者： Xue-Yang Qin li-Shuang li Jing-Yao Tang Fei Hao Mei-ling Ge Guang-Yao Pang School of Computer Science and Technology Dalian University of TechnologyDalian 116024China School of Computer Science Shaanxi Normal UniversityXi’an 710119China School of Computer Engineering Weifang UniversityWeifang 261061China Guangxi Colleges and Universities Key Laboratory of Intelligent Industry Software Wuzhou UniversityWuzhou 543002 China

Image-text retrieval aims to capture the semantic correspondence between images and texts,which serves as a foundation and crucial component in multi-modal recommendations,search systems,and online *** mainstream methods primarily focus on modeling the association of image-text pairs while neglecting the advantageous impact of multi-task learning on image-text *** this end,a multi-task visual semantic embedding network(MVSEN)is proposed for image-text ***,we design two auxiliary tasks,including text-text matching and multi-label classification,for semantic constraints to improve the generalization and robustness of visual semantic embedding from a training ***,we present an intra-and inter-modality interaction scheme to learn discriminative visual and textual feature representations by facilitating information flow within and between ***,we utilize multi-layer graph convolutional networks in a cascading manner to infer the correlation of image-text *** results show that MVSEN outperforms state-of-the-art methods on two publicly available datasets,Flickr30K and MSCOCO,with rSum improvements of 8.2%and 3.0%,respectively.

关键词： image-text retrieval cross-modal retrieval multi-task learning graph convolutional network

Prevalence and risk factors of depression among patients with perianal fistulizing Crohn’s disease

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World Journal of Psychiatry 2024年第5期14卷 715-725页

作者： Jing li Wing-Yi Ng li-Chao Qiao Fen Yuan Xing Lan li-Bei Zhu Bo-lin Yang Zhong-Qiu Wang Department of Radiology Jiangsu Province Hospital of Chinese Medicine Affiliated Hospital of Nanjing University of Chinese MedicineNanjing 210029Jiangsu ProvinceChina Department of Acupuncture and Rehabilitation Jiangsu Province Hospital of Chinese Medicine Affiliated Hospital of Nanjing University of Chinese MedicineNanjing 210029Jiangsu ProvinceChina Department of Colorectal Surgery Jiangsu Province Hospital of Chinese Medicine Affiliated Hospital of Nanjing University of Chinese MedicineNanjing 210029Jiangsu ProvinceChina

BACKGROUND Psychological distress,especially depression,associated with perianal fistulizing Crohn’s disease(PFCD)is widespread and ***,there is a surprising paucity of studies to date that have sought to identify the prevalence and risk factors of depression associated with *** To estimate the prevalence of depressive symptoms and investigate the depression-related risk factors in patients with *** The study was conducted in the form of survey and clinical data collection via questionnaire and specialized medical *** symptoms,life quality,and fatigue severity of patients with PFCD were assessed by Patient Health Questionnaire-9,Inflammatory Bowel Disease Patient Quality of life Questionnaire(IBDQ),and Inflammatory Bowel Disease(IBD)Fatigue Patient Self-assessment *** basic demographic information,overall disease features,perianal clinical information,and laboratory inflammation indicators were also *** regression analysis was ultimately used to ascertain the risk factors of depression associated with *** A total of 123 patients with PFCD were involved,and 56.91%were suffering from *** to multivariate logistic regression analysis,Perianal Disease Activity Index(PDAI)score[odds ratio(OR)=0.69,95%confidence interval(CI):0.50 to 0.95],IBDQ score(OR=0.93,95%CI:0.88 to 0.97),modified Van Assche index(OR=1.24,95%CI:1.01 to 1.53),and IBD Fatigue score(OR=1.72,95%CI:1.23 to 2.42)were independent risk factors of depression-related prevalence among patients with PFCD(Plinear regression analysis revealed that the increasing perianal modified Van Assche index(βvalue=0.166,95%CI:0.02 to 0.31)and decreasing IBDQ score(βvalue=-0.116,95%CI:-0.14 to-0.09)were independently associated with the severity of depression(Plity of life,and fatigue severity

关键词： Crohn’s disease Fistula Depression Inflammatory bowel diseases Risk factors

Physical Layer Security Performance Analysis in Multi-Antenna NOMA-Based UAV Relay Networks

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China Communications 2024年第9期21卷 98-108页

作者： Huang Haiyan Zhang Hongsheng liang linlin li Yahong School of Electronic and Information Engineering Lanzhou Jiaotong UniversityLanZhou 730070China School of Cyber Engineering Xidian UniversityXi’an 710071China

With the increasing number of communication devices and the complexity of communication environments,unmanned aerial vehicles(UAV),due to their flexible deployment and convenient networking capabilities,have shown significant advantages in tasks such as high-density communication areas and emergency rescue within special communication *** the openness of air-toground wireless communication,it is more susceptible to eavesdropping *** a result,the introduction of physical layer security(PLS)in UAV communication systems is crucial to safeguard the security of transmitted *** this paper,we investigate the PLS issues in a UAV cooperative communication system operating in Nakagami-m fading channels with the presence of friendly *** considers the effects of imperfect successive interference cancellation(i SIC)and power allocation coefficients on system performance based on non-orthogonal multiple access(NOMA)*** deriving closed-form expressions for the outage probabilities at the receiving users and the intercept probability of UAV eavesdropper(U-EAV),the performance of the considered cooperative UAV-assisted NOMA relay system with the presence of friendly interference is evaluated.

关键词： intercept probability NOMA outage

Greatly enhanced corrosion/wear resistances of epoxy coating for Mg alloy through a synergistic effect between functionalized graphene and insulated blocking layer

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Journal of Magnesium and Alloys 2024年第1期12卷 332-344页

作者： Z.Y.Xue X.J.li J.H.Chu M.M.li D.N.Zou L.B.Tong School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an 710055China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan UniversityChangsha 410082China

The poor corrosion and wear resistances of Mg alloys seriously limit their potential applications in various *** conventional epoxy coating easily forms many intrinsic defects during the solidification process,which cannot provide sufficient *** the current study,we design a double-layer epoxy composite coating on Mg alloy with enhanced anti-corrosion/wear properties,via the spin-assisted assembly *** outer layer is functionalized graphene(FG)in waterborne epoxy resin(WEP)and the inner layer is Ce-based conversion(Ce)*** FG sheets can be homogeneously dispersed within the epoxy matrix to fill the intrinsic defects and improve the barrier *** Ce film connects the outer layer with the substrate,showing the transition *** corrosion rate of Ce/WEP/FG composite coating is 2131 times lower than that of bare Mg alloy,and the wear rate is decreased by~90%.The improved corrosion resistance is attributed to the labyrinth effect(hindering the penetration of corrosive medium)and the obstruction of galvanic coupling *** synergistic effect derived from the FG sheet and blocking layer exhibits great potential in realizing the improvement of multi-functional integration,which will open up a new avenue for the development of novel composite protection coatings of Mg alloys.

关键词： Mg alloy Functionalized graphene Epoxy coating Corrosion/wear resistance Blocking layer

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食物偏好机制及其对肥胖影响的研究进展

上海交通大学学报（医学版） 2024年第9期44卷 1190-1196页

作者：康飘张盈李华婷上海交通大学医学院附属第六人民医院内分泌代谢科上海市糖尿病研究所上海市糖尿病重点实验室上海市糖尿病临床医学中心上海200233

近年来全球的肥胖患病率持续攀升,对高糖和高脂食物的偏好是导致肥胖的主要原因之一。食物的偏好指个体对特定食物的喜好程度,其形成与食物在胃肠道消化后产生的饱腹感、满足感和奖赏感等生理效应密切相关。随着神经影像学、化学遗传学... 详细信息

近年来全球的肥胖患病率持续攀升,对高糖和高脂食物的偏好是导致肥胖的主要原因之一。食物的偏好指个体对特定食物的喜好程度,其形成与食物在胃肠道消化后产生的饱腹感、满足感和奖赏感等生理效应密切相关。随着神经影像学、化学遗传学等技术的不断发展,食物偏好行为背后的神经、生理机制正逐步被揭示。有研究显示,食物在胃肠道内消化吸收的过程中可以释放化学信号或电信号,这些信号通过神经通路、体液通路及肠道菌群介导的肠-脑轴传递至中枢神经系统,随后通过激活或抑制孤束核神经元、多巴胺奖赏回路和下丘脑中的相关神经通路来调节摄食行为。基于此,该文对食物偏好的定义、评估方法和机制研究进行介绍,并对食物信息在肠-脑轴之间的传递途径、调节食物偏好的奖赏回路以及食物偏好行为在肥胖治疗中的应用进行综述,以期为食物偏好领域的研究及肥胖治疗提供一定的参考。

关键词：食物偏好肥胖肠-脑轴奖赏

A systematic review of the efficacy of traditional Chinese medicine retention enema in the treatment of ulcerative colitis

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Journal of Integrative Nursing 2024年第1期6卷 55-61页

作者： Jiaji li ling TANG Ye li Jingjin XU Jing ZHANG School of Nursing Beijing University of Chinese MedicineBeijingChina Department of Nursing Dongfang Hospital of Beijing University of Chinese MedicineBeijingChina

The objective of this study is to summarize the efficacy and safety of traditional Chinese medicine(TCM)enema in the treatment of ulcerative colitis(UC).The randomized controlled trials on TCM enema intervention in the treatment of UC were searched in seven databases:PubMed,Embase,Web of Science,CBM,CNKI,Wanfang Database,and VIP Database from January 1,2013 to June 6,2022,and the data were analyzed using RevMan 5.3 software.A total of 18 studies involving 1514 UC patients were *** analysis results showed that compared with conventional Western medicine,Chinese medicine enema had a significant effect on UC,and the clinical effective rate of the experimental group using Chinese medicine enema was 4.45 times that of the control group using conventional Western medicine(odds ratio=4.45,95%confidence interval[3.27,6.06]).Therefore,Chinese medicine enema is effective in the treatment of UC,and can significantly reduce related symptoms.

关键词： Meta‑analysis retention enema systematic review traditional Chinese medicine ulcerative colitis

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基于双洋葱路径的双向匿名秘密通信方案

计算机工程与设计 2024年第7期45卷 1928-1933页

作者：周世杰李晓宇郑州大学计算机与人工智能学院河南郑州450001

针对通信双方在通信过程中身份和位置隐私的安全问题,提出一种基于双洋葱路径的双向匿名秘密通信方案。使用随机洋葱路由和混合加密方法来保证通信过程中的双向匿名性和消息保密性。发送者和接收者通过一个公告板节点作为中介建立起两... 详细信息

针对通信双方在通信过程中身份和位置隐私的安全问题,提出一种基于双洋葱路径的双向匿名秘密通信方案。使用随机洋葱路由和混合加密方法来保证通信过程中的双向匿名性和消息保密性。发送者和接收者通过一个公告板节点作为中介建立起两条单向的洋葱路径实现双向的匿名通信。不仅发送者和接收者无法获取对方的身份和位置信息,任意第三方都无法获得发送者或者接收者的身份和位置信息。通信内容使用AES密钥加密,公告板节点、中转节点和任意的攻击者都无法获取。实验结果表明,网络中任意两个节点之间可以实现双向匿名秘密通信。平均响应时间随着节点总数的增加呈近似线性增长,不会出现系统无法响应的情况。

关键词：网络安全混合加密洋葱路由双向匿名秘密通信匿名通信匿名度公告板

Dynamic behavior analysis, color image encryption and circuit implementation of a novel complex memristive system

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Optoelectronics Letters 2024年第3期20卷 183-192页

作者： XIONG li WANG Xuan ZHANG Xinguo HE Tongdi School of Physics and Electromechanical Engineering Hexi UniversityZhangye 734000China School of Information Science and Engineering Dalian Polytechnic UniversityDalian 116034China School of Information Science and Engineering Lanzhou UniversityLanzhou 730000China

This paper is devoted to introduce a novel four-dimensional memristor-involved system and its applications in image encryption and chaotic circuit. The typical dynamical behaviors of the memristor-involved system are explored, such as chaotic phase potraits, Lyapunov exponent spectrum(LES), bifurcation diagram(BD) and complexity analysis. Then a color image encryption algorithm is designed. In this algorithm, the sequences generated by the four-dimensional memristor-involved system are used in scrambling and diffusion algorithm for three channels.

关键词： image system chaotic