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Synthesized AI LMI-based Criterion for Mechanical Systems

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Sound & Vibration 2019年第6期53卷 245-250页

作者： jcy chen Wc chen Tim chen Alex Wilson NFadilah Jamaludin Nertrand Kapron Tim chen John Burno Faculty of Information Technology Ho Chi Minh City UniversityHo Chi Minh CityVietnam Department of Data Science RMIT UniversityMelbourneVICAustralia School of Physical and Mathematical Technology Nanyang Technological University21 Nanyang LinkSingaporeSingapore Faculty of Engineering King Abdulaziz UniversityJeddah 21589Saudi Arabia Heidelberg Academy of Sciences HeidelbergBaden-WürttembergGermany

This paper proposes a novel artificial intelligence sythethized controller in the mechanical system which has high speed computation because of the LMI type *** proposed membership functions are adopted and stabilization criterion of the closed-loop T-S fuzzy systems are obtained through a new parametrized LMI(linear matrix)inequality which is rearranged by machine learning membership functions.

关键词： Fuzzy energy equation artificial intelligence large-scale systems fuzzy model

Corrections Notice to: Evolved Algorithm and Vibration Stability for Nonlinear Disturbed Security Systems

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Sound & Vibration 2019年第6期53卷 309-309页

作者： Tim chen Wray Marriott Ann Nicholson Tim chen Mars Kmieckowiak jcy chen Faculty of Information Technology Ton Duc Thang UniversityHo Chi Minh CityVietnam Department of Data Science Monash UniversityMelbourneVictoriaAustralia Dyson School of Design Engineering Imperial College LondonSouth Kensington Campus London SW72AZUK Faculty of Engineering King Abdulaziz UniversityJeddah 21589Saudi Arabia Faculty of Mathematics and Natural Sciences Albertus-Magnus-Platz50923 KölnGerman Industrial Technology Research Institute 31057 HsinchuTaiwanDepartment of Artificial IntelligenceUniversity of MarylandMaryland 20742USA

The authors would like to make the following corrections to our published paper[1].The first author’s name is corrected from“Tcw chen1”to“Tim chen1”.The first affiliation address is corrected from“1 Department of Electrical and Computer Engineering,North South University,Dhaka-1229,Bagladesh.”to“1 Faculty of Information Technology,Ton Duc Thang University,Ho Chi Minh City,Vietnam.”.

关键词： correction corrected Vietnam

On convergence of covariance matrix of empirical Bayes hyper-parameter estimator

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Control Theory and Technology 2024年第2期22卷 149-162页

作者： Yue Ju Biqiang Mu Tianshi chen School of Data Science and Shenzhen Research Institute of Big Data The Chinese University of Hong KongShenzhenShenzhen518172GuangdongChina Division of Decision and Control Systems School of Electrical Engineering and Computer ScienceKTH Royal Institute of Technology10044StockholmSweden Key Laboratory of Systems and Control Institute of Systems ScienceAcademy of Mathematics and System ScienceChinese Academy of SciencesBeijing100190China

Regularized system identification has become the research frontier of system identification in the past *** related core subject is to study the convergence properties of various hyper-parameter estimators as the sample size goes to *** this paper,we consider one commonly used hyper-parameter estimator,the empirical Bayes(EB).Its convergence in distribution has been studied,and the explicit expression of the covariance matrix of its limiting distribution has been ***,what we are truly interested in are factors contained in the covariance matrix of the EB hyper-parameter estimator,and then,the convergence of its covariance matrix to that of its limiting distribution is *** general,the convergence in distribution of a sequence of random variables does not necessarily guarantee the convergence of its covariance ***,the derivation of such convergence is a necessary complement to our theoretical analysis about factors that influence the convergence properties of the EB hyper-parameter *** this paper,we consider the regularized finite impulse response(FIR)model estimation with deterministic inputs,and show that the covariance matrix of the EB hyper-parameter estimator converges to that of its limiting ***,we run numerical simulations to demonstrate the efficacy of ourtheoretical results.

关键词： Regularized system identification Hyper-parameter estimator Empirical Bayes Convergence of covariance matrix

Increased excitatory amino acid transporter 2 levels in basolateral amygdala astrocytes mediate chronic stress–induced anxiety-like behavior

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Neural Regeneration Research 2025年第6期20卷 1721-1734页

作者： Xirong Xu Shoumin Xuan Shuai chen Dan Liu Qian Xiao Jie Tu Shenzhen Key Laboratory of Neuroimmunomodulation for Neurological Diseases Shenzhen-Hong Kong Institute of Brain ScienceShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong ProvinceChina CAS Key Laboratory of Brain Connectome and Manipulation Brain Cognition and Brain Disease Institute(BCBDI)Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong ProvinceChina Guangdong Provincial Key Laboratory of Brain Connectome and Behavior the Brain Cognition and Brain Disease Institute(BCBDI)Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong ProvinceChina University of Chinese of Academy of Sciences BeijingChina Faculty of Life and Health Sciences Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong ProvinceChina

The conventional perception of astrocytes as mere supportive cells within the brain has recently been called into question by empirical evidence, which has revealed their active involvement in regulating brain function and encoding behaviors associated with ***, astrocytes in the basolateral amygdala have been found to play a role in the modulation of anxiety-like behaviors triggered by chronic stress. Nevertheless, the precise molecular mechanisms by which basolateral amygdala astrocytes regulate chronic stress–induced anxiety-like behaviors remain to be fully elucidated. In this study, we found that in a mouse model of anxiety triggered by unpredictable chronic mild stress, the expression of excitatory amino acid transporter 2 was upregulated in the basolateral amygdala. Interestingly, our findings indicate that the targeted knockdown of excitatory amino acid transporter 2 specifically within the basolateral amygdala astrocytes was able to rescue the anxiety-like behavior in mice subjected to stress. Furthermore, we found that the overexpression of excitatory amino acid transporter 2 in the basolateral amygdala, whether achieved through intracranial administration of excitatory amino acid transporter 2agonists or through injection of excitatory amino acid transporter 2-overexpressing viruses with GfaABC1D promoters, evoked anxiety-like behavior in mice. Our single-nucleus RNA sequencing analysis further confirmed that chronic stress induced an upregulation of excitatory amino acid transporter 2 specifically in astrocytes in the basolateral amygdala. Moreover, through in vivo calcium signal recordings, we found that the frequency of calcium activity in the basolateral amygdala of mice subjected to chronic stress was higher compared with normal *** knocking down the expression of excitatory amino acid transporter 2 in the basolateral amygdala, the frequency of calcium activity was not significantly increased, and anxiety-like behavior was ob

关键词： anxiety astrocytes basolateral amygdala behavior dihydrokainic acid excitatory amino acid transporter 2 fiber photometry glutamate LDN-212320 transporter

超声定位显微成像对肿瘤演进及磁热疗效的评估

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声学学报 2024年第3期49卷 417-423页

作者：冯宇康王罗军郑罕孔新丽杨思琦陈海鑫陈冕陈昕陈思平林浩铭深圳大学医学部生物医学工程学院深圳518060 医学超声关键技术国家地方联合工程实验室深圳518060 广东省生物医学信息检测与超声成像重点实验室深圳518060

肿瘤的演进和消融伴随着微血管网络的变化,因此使用超声定位显微成像技术评估肿瘤区域微血管及其在磁热疗作用下的变化。通过构建小鼠肿瘤动物模型,搭建实验平台进行超声动物实验,实现肿瘤内部细微血管成像。通过向肿瘤部位注射磁纳米粒... 详细信息

肿瘤的演进和消融伴随着微血管网络的变化,因此使用超声定位显微成像技术评估肿瘤区域微血管及其在磁热疗作用下的变化。通过构建小鼠肿瘤动物模型,搭建实验平台进行超声动物实验,实现肿瘤内部细微血管成像。通过向肿瘤部位注射磁纳米粒子,在外部磁场的作用下产生热效应,实现对肿瘤的磁热治疗。实验结果表明,超声定位显微镜成像能观察到肿瘤生长演进过程中微血管网络的变化,且其变化情况与免疫组化结果具有一致性。此外,磁热治疗后肿瘤内部血管明显减少,与病理切片结果相符,验证了磁热治疗的可行性。

关键词：超声定位显微成像微血管图像肿瘤演进磁热治疗

基于语义辅助和深度时序一致性约束的自监督单目深度估计

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湖南大学学报（自然科学版） 2024年第8期51卷 1-12页

作者：凌传武陈华徐大勇张小刚湖南大学电气与信息工程学院湖南长沙410082 湖南大学信息科学与工程学院湖南长沙410082 中国烟草总公司郑州烟草研究院河南郑州450000

通过使用相邻帧之间的光度一致性损失代替深度标签作为网络训练的监督信号,基于图像序列训练的自监督单目深度估计方法近年来受到了广泛的关注.光度一致性约束遵循了静态世界假设,而单目图像序列中存在的运动目标违反该假设,进而影响自... 详细信息

通过使用相邻帧之间的光度一致性损失代替深度标签作为网络训练的监督信号,基于图像序列训练的自监督单目深度估计方法近年来受到了广泛的关注.光度一致性约束遵循了静态世界假设,而单目图像序列中存在的运动目标违反该假设,进而影响自监督训练过程中相机位姿估计精度和光度损失函数的计算精度.通过检测并移除运动目标区域,可在得到与目标运动解耦的相机位姿的同时,消除运动目标区域对光度损失计算精度的影响.为此,本文提出了一种基于语义辅助和深度时序一致性约束的自监督单目深度估计网络.首先,使用离线的实例分割网络检测可能违反静态世界假设的动态类别目标,并移除对应区域输入位姿网络从而得到与物体运动解耦的相机位姿.其次,基于语义一致性和光度一致性约束,检测动态类别目标的运动状态,使得运动区域的光度损失不影响网络参数的迭代更新.最后,在非运动区域施加深度时序一致性约束,显式对齐当前帧的估计深度值与相邻帧的投影深度值,进一步细化深度预测结果.在KITTI、DDAD以及KITTI Odometry数据集上的实验验证了所提方法与以往的自监督单目深度估计方法相比具有更出色的性能表现.

关键词：单目深度估计自监督学习运动目标时序一致性

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不同冲泡时间和次数对藤茶活性成分的影响

山东农业大学学报（自然科学版） 2024年第5期55卷 767-773页

作者：张朝阳陈芳黄忠浩陈娥张强崔清梅恩施土家族苗族自治州农业科学院湖北恩施445000

为探究不同冲泡时间和次数对藤茶活性成分的影响,本研究测定了藤茶(茶水比1∶50)分别在沸水冲泡5 min、10 min、20 min、30 min、1 h、2 h、4 h、6 h、8 h、12 h、24 h和冲泡5次的(2R,3R)-二氢杨梅素、(2S,3S)-二氢杨梅素、花旗松素、... 详细信息

为探究不同冲泡时间和次数对藤茶活性成分的影响,本研究测定了藤茶(茶水比1∶50)分别在沸水冲泡5 min、10 min、20 min、30 min、1 h、2 h、4 h、6 h、8 h、12 h、24 h和冲泡5次的(2R,3R)-二氢杨梅素、(2S,3S)-二氢杨梅素、花旗松素、杨梅苷、杨梅素、多酚、可溶性糖、水溶性浸出物含量,同时进行主成分分析。结果表明,(2R,3R)-二氢杨梅素、(2S,3S)-二氢杨梅素、花旗松素、多酚的含量随冲泡时间的增加均呈先升后降的趋势,含量最高时冲泡时间均为30 min;杨梅苷、可溶性糖的含量随冲泡时间的增加均呈先上升后逐渐趋于平缓的趋势,含量最高时冲泡时间分别为6 h、8 h;杨梅素的含量随冲泡时间的增加呈逐渐上升的趋势,含量最高时冲泡时间为24 h;7种活性成分和水溶性浸出物的含量均随冲泡次数的增加呈显著下降趋势;主成分分析共提取特征值大于1的主成分2个,方差累计贡献率98.225%,同时建立活性成分评价模型Y=0.761 79Y_(1)+0.220 45Y_(2)。藤茶冲泡时间为30 min时,活性成分综合评分最高,冲泡2次(每次25 min)时,多种活性成分溶出率达95%以上,本研究可为藤茶的科学饮用提供理论依据。

关键词：藤茶冲泡时间冲泡次数活性成分

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Semi-tensor product of matrices approach to reachability of finite automata with application to language recognition

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Frontiers of Computer Science 2014年第6期8卷 948-957页

作者： Yongyi YAN Zengqiang chen Zhongxin LIU College of Computer and Control Engineering Nankai University Tianjin 300071 China College of Science Civil Aviation University of China Tianjin 300300 China

This paper investigates the transition function and the reachability conditions of finite automata by using a semitensor product of matrices, which is a new powerful matrix analysis tool. The states and input symbols are first expressed in vector forms, then the transition function is described in an algebraic form. Using this algebraic representation, a sufficient and necessary condition of the reachability of any two states is proposed, based on which an algorithm is developed for discovering all the paths from one state to another. Furthermore, a mechanism is established to recognize the language acceptable by a finite automaton. Finally, illustrative examples show that the results/algorithms presented in this paper are suitable for both deterministic finite automata （DFA） and nondeterministic finite automata （NFA）.

关键词： finite automata reachability analysis transition function expression matrix approach semi-tensor product

血清Irisin、TPOAb联合对孕妇妊娠期甲状腺功能减退的诊断价值

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国际检验医学杂志 2024年第2期45卷 175-178,183页

作者：陈军向婧姚茂篪湖北民族大学附属民大医院内分泌内科湖北恩施445000 湖北民族大学附属民大医院全科医学科湖北恩施445000

目的探讨血清鸢尾素(Irisin)、甲状腺过氧化物酶抗体(TPOAb)联合对孕妇妊娠期甲状腺功能减退(简称甲减)的诊断价值。方法选取2020年10月至2022年10月于该院诊治的107例妊娠期甲减孕妇作为研究组,另选取107例同期在本院体检,且一般资料... 详细信息

目的探讨血清鸢尾素(Irisin)、甲状腺过氧化物酶抗体(TPOAb)联合对孕妇妊娠期甲状腺功能减退(简称甲减)的诊断价值。方法选取2020年10月至2022年10月于该院诊治的107例妊娠期甲减孕妇作为研究组,另选取107例同期在本院体检,且一般资料与妊娠期甲减孕妇相匹配的健康孕妇及107例非妊娠期健康女性分别作为对照组和健康组。采用Pearson法分析妊娠期甲减孕妇血清Irisin和TPOAb水平的相关性;采用Logistic回归分析影响妊娠期甲减发生的相关因素;采用受试者工作特征(ROC)曲线分析血清Irisin和TPOAb水平对妊娠期甲减的诊断价值。结果研究组血清Irisin和TPOAb水平均明显高于健康组及对照组(P<0.05);妊娠期甲减孕妇血清Irisin和TPOAb水平呈正相关(r=0.641,P<0.05);研究组孕前体质量指数(BMI)<20 kg/m 2、碘摄入量不足的孕妇所占比例高于对照组(P<0.05);孕前BMI<20 kg/m 2、碘摄入量不足、Irisin及TPOAb水平升高均为孕妇发生妊娠期甲减的危险因素(P<0.05);血清Irisin和TPOAb诊断妊娠期甲减的曲线下面积(AUC)分别为0.765、0.835,而二者联合诊断的AUC为0.926,二者联合优于血清Irisin、TPOAb单独诊断(Z二者联合-Irisin=6.105、Z二者联合-TPOAb=4.951,P均<0.001)。结论血清Irisin和TPOAb水平的升高与妊娠期甲减的发生密切相关,二者联合检测对妊娠期甲减具有较高的诊断价值。

关键词：妊娠期甲状腺功能减退鸢尾素甲状腺过氧化物酶抗体