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Improving Federated Learning through Abnormal Client Detection and Incentive

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Computer Modeling in Engineering & Sciences 2024年第4期139卷 383-403页

作者： Hongle Guo Yingchi Mao xiaoming he Benteng Zhang Tianfu Pang Ping Ping College of Computer and Information Hohai UniversityNanjing211100China Key Laboratory ofWater Big Data Technology of Ministry ofWater Resources Hohai UniversityNanjing211100China

Data sharing and privacy protection are made possible by federated learning,which allows for continuous model parameter sharing between several clients and a central *** reliable and high-quality clients must participate in practical applications for the federated learning global model to be accurate,but because the clients are independent,the central server cannot fully control their *** central server has no way of knowing the correctness of the model parameters provided by each client in this round,so clients may purposefully or unwittingly submit anomalous data,leading to abnormal behavior,such as becoming malicious attackers or defective *** reduce their negative consequences,it is crucial to quickly detect these abnormalities and incentivize *** this paper,we propose a Federated Learning framework for Detecting and Incentivizing Abnormal Clients(FL-DIAC)to accomplish efficient and security federated *** build a detector that introduces an auto-encoder for anomaly detection and use it to perform anomaly identification and prevent the involvement of abnormal clients,in particular for the anomaly client detection *** them,before the model parameters are input to the detector,we propose a Fourier transform-based anomaly data detectionmethod for dimensionality reduction in order to reduce the computational ***,we create a credit scorebased incentive structure to encourage clients to participate in training in order tomake clients actively *** training models(CNN,MLP,and ResNet-18)and three datasets(MNIST,Fashion MNIST,and CIFAR-10)have been used in *** to theoretical analysis and experimental findings,the FL-DIAC is superior to other federated learning schemes of the same type in terms of effectiveness.

关键词： Federated learning abnormal clients incentive credit score abnormal score detection

MULTIPLICITY OF NORMALIZED SOLUTIONS FOR The FRACTIONAL SCHR?DINGER-POISSON SYSTEM WITH DOUBLY CRITICAL GROWTH

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Acta Mathematica Scientia 2024年第3期44卷 997-1019页

作者：孟禹希贺小明 School of Mathematics and Statistics Beijing Institute of TechnologyBeijing100081China College of Science Minzu University of ChinaBeijing100081China

In this paper,we are concerned with solutions to the fractional Schrodinger-Poisson system■ with prescribed mass ∫_(R^(3))|u|^(2)dx=a^(2),where a> 0 is a prescribed number,μ> 0 is a paremeter,s ∈(0,1),2 he fractional critical Sobolev *** the L2-subcritical case,we show the existence of multiple normalized solutions by using the genus theory and the truncation technique;in the L^(2)-supercritical case,we obtain a couple of normalized solutions by developing a fiber *** both cases,to recover the loss of compactness of the energy functional caused by the doubly critical growth,we need to adopt the concentration-compactness *** results complement and improve upon some existing studies on the fractional Schrodinger-Poisson system with a nonlocal critical term.

关键词： fractional Schrodinger-Poisson system normalized solutions variational methods L^(2)-subcritical L^(2)-supercritical

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在役公路隧道结构健康监测系统设计与应用

黄河水利职业技术学院学报 2024年第2期36卷 40-45页

作者：贺晓铭黄河水利职业技术学院河南开封475004

为实现在役高速公路隧道结构健康状态实时监测和智慧化管养,需建立隧道结构健康监测系统。分析了系统的结构,以某在役高速公路隧道为例,探讨了隧道结构健康监测项目的选择、测点的布设,并对系统的界面和功能进行了分析。

关键词：在役公路高速公路隧道结构健康监测系统数据交互可视化平台病害分析系统功能

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大型IP网络流量矩阵分析预测的探讨研究

系统工程与电子技术 2024年第6期46卷 2164-2173页

作者：韦烜刘志华李青何晓明黄君雅中国电信股份有限公司广东研究院广东广州510630 中国电信股份有限公司研究院上海200123

高效、准确的网际协议(internet protocol,IP)网络流量流向分析预测是网络规划建设的基础。通过部署流量采集分析系统,运营商可轻松获取网络总流量、节点流量、节点分方向流量等较完备的历史基础数据,为流量分析预测提供关键的输入。IP... 详细信息

高效、准确的网际协议(internet protocol,IP)网络流量流向分析预测是网络规划建设的基础。通过部署流量采集分析系统,运营商可轻松获取网络总流量、节点流量、节点分方向流量等较完备的历史基础数据,为流量分析预测提供关键的输入。IP网络流量分析预测方法主要包括两类:传统统计模型和神经网络模型,近年提出的NeuralProphet模型因结合两者优点而得到广泛关注和应用。首次基于NeuralProphet模型对大型运营级IP网络源节点到目的节点的流量流向进行直接预测,并采用改进的损失函数优化模型训练,预测结果表明NeuralProphet模型能够更科学、准确地预测IP网络流量矩阵,整体预测精度提升了8.7%,同时模型扩展性和鲁棒性也具有更佳的表现,可以更好地满足IP网络规划建设和运行维护的实际需求。

关键词：流量矩阵源节点到目的节点流量流向节点流量预测模型自回归

非细胞渗透模型在BSCⅡ类药物渗透性研究中的应用进展

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中国现代应用药学 2024年第8期41卷 1135-1141页

作者：吴文娜丁丽冯仲亮何晓明何朝星方瑜河北医科大学药学院药剂教研室石家庄050017

渗透性是肠道吸收和口服生物利用度的决定因素之一。非细胞渗透模型是一种体外渗透性测定工具,具有高效率、低成本、性质稳定、使用方便、可定制化等优点。根据屏障类型,非细胞渗透模型可分为含有(磷酸)脂质的仿生屏障和无脂质的非仿生... 详细信息

渗透性是肠道吸收和口服生物利用度的决定因素之一。非细胞渗透模型是一种体外渗透性测定工具,具有高效率、低成本、性质稳定、使用方便、可定制化等优点。根据屏障类型,非细胞渗透模型可分为含有(磷酸)脂质的仿生屏障和无脂质的非仿生屏障。仿生非细胞渗透模型包括平行人工膜渗透性测定模型、基于囊泡的渗透测定模型和人工纤维素-磷脂仿生膜测定模型。非仿生无细胞渗透模型有基于聚醚砜材料的中空纤维膜模型等。在国外,应用这4种屏障进行不同目的的研究正逐渐成为药物吸收研究的热点,但在国内,仅对平行人工膜渗透性测定模型的应用研究较多,缺乏对其他3种屏障的应用研究。笔者总结了渗透性装置和渗透性计算方法,检索了近几年非细胞渗透模型在BSCⅡ类药物渗透性方面的应用,对3种仿生屏障,和无脂质的中空纤维膜的特点应用进行归纳总结,以期满足难溶性药物配方开发需求。

关键词：渗透性 BSCⅡ类药物非细胞渗透模型仿生屏障中空纤维膜

Bifurcation and multiplicity of positive solutions for nonhomogeneous fractional Schrödinger equations with critical growth

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Science China Mathematics 2020年第8期63卷 1571-1612页

作者： xiaoming he Wenming Zou College of Science Minzu University of ChinaBeijing 100081China Department of Mathematical Sciences Tsinghua UniversityBeijing 100084China

In this paper we study the nonhomogeneous semilinear fractional Schr?dinger equation with critical growth{(−∆)su + u = u^2∗s−1 + λ(f(x, u) + h(x)), x ∈ R^N ,u ∈ Hs(R^N ), u(x) > 0, x ∈ RN ,where s∈(0,1),N>4 s,andλ>0 is a parameter,2s*=2 N/N-2 s is the fractional critical Sobolev exponent,f and h are some given *** show that there exists 0he problem has exactly two positive solutions ifλ∈(0,λ*),no positive solutions forλ>λ*,a unique solution(λ*,uλ*)ifλ=λ*,which shows that(λ*,uλ*)is a turning point in Hs(RN)for the *** proofs are based on the variational methods and the principle of concentration-compactness.

关键词： fractional Schrödinger equation bifurcation and multiplicity concentration-compactness principle critical Sobolev exponent

Ground state solutions for a class of fractional Kirchhoff equations with critical growth

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Science China Mathematics 2019年第5期62卷 853-890页

作者： xiaoming he Wenming Zou College of Science Minzu University of China Department of Mathematical Sciences Tsinghua University

In this paper, we study the effect of lower order perturbations in the existence of positive solutions to the fractional Kirchhoff equation with critical growth■ where a, b > 0 are constants, μ > 0 is a parameter,■ , and V : R^3→ R is a continuous potential function. For suitable assumptions on V, we show the existence of a positive ground state solution, by using the methods of the Pohozaev-Nehari manifold, Jeanjean's monotonicity trick and the concentration-compactness principle due to Lions(1984).

关键词： fractional Kirchhoff equations ground state solutions Pohozaev-Nehari manifold critical Sobolev exponent

INTERIOR PENALTY BILINEAR IFE DISCONTINUOUS GALERKIN METHODS FOR ELLIPTIC EQUATIONS WITH DISCONTINUOUS COEFFICIENT

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Journal of Systems Science & Complexity 2010年第3期23卷 467-483页

作者： xiaoming he Tao LIN Yanping LIN Department of Mathematics Virginia Teeh Blacksburg VA 24061 USA Department of Applied Mathematics Hong Kong Polytechnic University Hung Horn Hong Kong China Department of Mathematical and Statistics Science University of Alberta Edmonton AB T6G 2G1 Canada.

This paper applies bilinear immersed finite elements （IFEs） in the interior penalty discontinuous Galerkin （DG） methods for solving a second order elliptic equation with discontinuous coefficient. A discontinuous bihnear IFE space is constructed and applied to both the symmetric and nonsymmetric interior penalty DG formulations. The new methods can solve an interface problem on a Cartesian mesh independent of the interface with local refinement at any locations needed even if the interface has a nontrivial geometry. Numerical examples are provided to show features of these methods.

关键词： Adaptive mesh discontinuous Calerkin immersed interface interface problems penalty.

活血通络法对激素性股骨头坏死囊性变患者血清骨吸收/成血管/成骨蛋白调节作用的研究

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中国全科医学 2024年第12期27卷 1504-1510页

作者：何宪顺韦雨柔何敏聪林锟田佳庆詹芝玮林天烨何晓铭何伟魏秋实广州中医药大学第三临床医学院广东省广州市510378 广东省中医骨伤研究院广东省广州市510378 广州中医药大学第三附属医院关节科广东省广州市510378

背景激素性股骨头坏死(SIONFH)中囊性变具有“双刃剑”作用,活血通络法对早期激素性股骨头坏死疗效佳,但对囊性变骨吸收/成血管/成骨蛋白调节作用尚未明确。目的探讨活血通络法对激素性股骨头坏死囊性变患者血清骨吸收/成血管/成骨蛋白... 详细信息

背景激素性股骨头坏死(SIONFH)中囊性变具有“双刃剑”作用,活血通络法对早期激素性股骨头坏死疗效佳,但对囊性变骨吸收/成血管/成骨蛋白调节作用尚未明确。目的探讨活血通络法对激素性股骨头坏死囊性变患者血清骨吸收/成血管/成骨蛋白作用的影响。方法纳入2019年1月—2021年1月在广州中医药大学髋关节研究中心收治的60例SIONFH患者为研究对象,按随机数字表法分成两组,对照组和治疗组各30例。另选取同时期在医院体检正常且无激素使用史30例志愿者作为正常组。治疗组给予活血通络胶囊(2 g/次,3次/d)及碳酸钙(600 mg/次,1次/d)治疗,对照组给予等量碳酸钙治疗,两组患者疗程均为12个月,同时患肢加以限制性负重。采集空腹血清,采用酶联免疫吸附试验检测血清核因子κB受体活化因子配体(RANKL)、血小板衍生生长因子-BB(PDGF-BB)、血管内皮生长因子A(VEGFA)、骨保护素(OPG)、钙黏蛋白相关蛋白(CTNNB1)的表达水平,以门诊复诊方式分别于患者出院后第6、12个月进行2次随访,以股骨头塌陷定义为终点事件。以髋关节疼痛视觉模拟评分(VAS)、髋关节功能(Harris)评分和坏死面积评分进行疗效评估。结果3组研究对象基线RANKL、PDGF-BB、OPG、CTNNB1水平比较,差异均有统计学意义(P<0.05),组间比较结果显示,对照组、治疗组RANKL、PDGF-BB均高于正常组,OPG、CTNNB1均低于正常组(P<0.05)。重复测量方差分析结果示,时间和组别对RANKL、PDGF-BB、VEGFA、OPG、CTNNB1水平存在交互作用(P<0.05),时间和组别对RANKL、PDGF-BB、VEGFA、OPG、CTNNB1水平主效应显著(P<0.05)。其中第6个月治疗组RANKL水平高于对照组,第12个月治疗组PDGF-BB水平高于对照组,第6、12个月VEGFA、OPG、CTNNB1水平高于对照组(P<0.05)。治疗后第12个月治疗组髋关节VAS评分、坏死面积评分低于对照组,髋关节Harris评分高于对照组(P<0.05)。组内比较结果显示,治疗后第12个月治疗组髋关节VAS评分、坏死面积评分低于治疗前,髋关节Harris评分高于治疗前(P<0.05),对照组髋关节VAS评分、髋关节Harris评分高于治疗前(P<0.05)。结论活血通络法能上调激素性股骨头坏死患者RANKL、PDGF-BB、VEGFA、OPG和CTNNB1蛋白表达水平,有效促进SIONFH患者骨修复及改善临床症状,推测该疗法通过“骨吸收/成血管/成骨”三元修复网络促进囊性变骨修复作用。

关键词：股骨头坏死激素性股骨头坏死髋关节病活血通络骨吸收/成血管/成骨蛋白

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