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Quickly obtaining densely dispersed coherent particles in steel matrix and its related mechanical property

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 111-118页

作者： Xiaoxiao Wang Qingsong huang School of Chemical Engineering Sichuan UniversityChengdu 610065China

Densely distributed coherent nanoparticles(DCN)in steel matrix can enhance the work-hardening ability and ductility of steel *** the routes to this end can be generally classified into the liquid-solid route and the solid-solid ***,the formation of DCN structures in steel requires long processes and complex *** far,obtaining steel with coherent particle enhancement in a short time remains a bottleneck,and some necessary steps remain ***,we show a high-efficiency liquid-phase refining process reinforced by a dynamic magnetic ***-Y-Mn-O particles had an average size of around(3.53±1.21)nm and can be obtained in just around 180 *** small nanoparticles were coherent with the matrix,implying no accumulated dislocations between the particles and the steel *** findings have a potential application for improving material machining capacity,creep resistance,and radiation resistance.

关键词： ferritic steels coherent particles microstructure compression test work hardening

郴州市11055名育龄女性常见遗传性耳聋基因筛查结果分析

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中华耳科学杂志 2020年第2期18卷 342-347页

作者：徐梦洁张昊晴李彩云侯帅黄东群雷冬竹南华大学附属郴州临床医院产前诊断中心郴州423000 郴州市第一人民医院中心医院产前诊断中心郴州423000

目的探讨常见遗传性耳聋基因致病变异在郴州市听力正常育龄女性中的分布特点。方法采用高通量测序和生物信息学方法,对2017年3月至2019年5月就诊于郴州市第一人民医院产前诊断中心的11055名听力正常育龄女性进行遗传性耳聋4个基因GJB2、... 详细信息

目的探讨常见遗传性耳聋基因致病变异在郴州市听力正常育龄女性中的分布特点。方法采用高通量测序和生物信息学方法,对2017年3月至2019年5月就诊于郴州市第一人民医院产前诊断中心的11055名听力正常育龄女性进行遗传性耳聋4个基因GJB2、SLC26A4、GJB3、线粒体12SrRNA的20个变异位点筛查;对携带GJB2或者SLC26A4基因致病变异携带者的配偶行相应基因全面测序;对线粒体12SrRNA基因致病变异携带者进行家系分析及用药指导;对夫妇均在同一个基因上为致病变异携带进行遗传咨询及生育指导。结果11055例受检者中检出耳聋基因致病变异携带者448例,携带率为4.05%,包括6例SLC26A4双杂合变异和7例GJB2和SLC26A4基因双杂合变异携带者;检出GJB2基因杂合变异246例(2.22%,246/11055)、SLC26A4基因杂合变异150例(1.36%,150/11055)、GJB3基因杂合变异28例(0.25%,28/11055)和线粒体12SrRNA基因杂合变异36例(0.33%,36/11055);其中385例筛查阳性者携带GJB2或者SLC26A4基因致病变异,其中135例携带者的配偶行相应基因全面测序,检出明确致病变异20例,c.109 G>A位点检出率达11.67%;经遗传咨询后15例夫妇携带同一致病基因的孕妇行产前诊断,其中3例胎儿为耳聋高风险者;结论郴州市听力正常育龄女性遗传性耳聋基因致病变异携带率为4.05%,其中GJB2基因变异位点c.235delC及c.299-300delAT和SLC26A4基因变异位点c.919-2A>G(IVS7-2A>G)为本地区育龄女性携带率前三位的遗传性耳聋致病变异位点,建立适宜的遗传性耳聋基因筛查模式,对耳聋防控工作具有重要意义。

关键词：郴州市遗传性耳聋基因检测产前诊断

Local-contrastive-learning machine with both generalization and adversarial robustness: A statistical physics analysis

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 109-123页

作者： Mingshan Xie Yuchen Wang Haiping huang PMI Lab School of Physics Sun Yat-sen University Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices Sun Yat-sen University

Distinct from human cognitive processing, deep neural networks trained by backpropagation can be easily fooled by adversarial examples. To design a semantically meaningful representation learning, we discard backpropagation, and instead, propose a local contrastive learning, where the representations for the inputs bearing the same label shrink(akin to boson) in hidden layers,while those of different labels repel(akin to fermion). This layer-wise learning is local in nature, being biologically plausible.A statistical mechanics analysis shows that the target fermion-pair-distance is a key parameter. Moreover, the application of this local contrastive learning to MNIST benchmark dataset demonstrates that the adversarial vulnerability of standard perceptron can be greatly mitigated by tuning the target distance, i.e., controlling the geometric separation of prototype manifolds.

关键词： machine learning statistical mechanics adversarial robustness neural networks

全外显子组测序对于智力障碍或全面发育迟缓患者的诊断价值

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中华医学遗传学杂志 2023年第6期40卷 648-654页

作者：李阳艳雷冬竹李彩云黄东群谭菊芳张昊晴南华大学衡阳医学院附属郴州医院产前诊断中心衡阳421001 郴州市第一人民医院中心医院产前诊断中心郴州423000

目的探讨全外显子组测序(WES)对于智力障碍(ID)或全面发育迟缓(GDD)患者的诊断价值。方法选取2018年5月至2021年12月于郴州市第一人民医院就诊的134例ID或GDD患者为研究对象。采集患者及其父母的外周血样进行WES检测,对候选变异进行San... 详细信息

目的探讨全外显子组测序(WES)对于智力障碍(ID)或全面发育迟缓(GDD)患者的诊断价值。方法选取2018年5月至2021年12月于郴州市第一人民医院就诊的134例ID或GDD患者为研究对象。采集患者及其父母的外周血样进行WES检测,对候选变异进行Sanger测序/拷贝数变异测序(CNV-seq)验证和家系来源分析,对候选变异根据美国医学遗传学与基因组学学会(ACMG)变异分类标准进行致病性评估。结果在134例患者中,共检出致病性单核苷酸变异(SNV)及小片段插入/缺失(InDel)46例,致病性基因组拷贝数变异(CNV)11例,单亲二倍体(UPD)1例,总体阳性检出率为43.28%(58/134)。46例致病性SNV/InDel共涉及40个基因62个位点,其中最多的是MECP2基因(n=4)。11例致病性CNV中,10例为缺失变异,1例为重复变异,片段范围为0.76~15.02 Mb。1例患者在15q11.2q12区存在约15.62 Mb的杂合性丢失(LOH),结合家系WES数据提示为父源性UPD,结合其临床表型诊断为Angelman综合征。结论WES不仅能够高效检出SNV/InDel,对CNV、LOH也有较高的检出率,结合家系数据分析能够准确判断变异的来源,这些优势表明WES对ID或GDD患者的遗传学病因诊断具有重要的价值。

关键词：全外显子组测序拷贝数变异测序智力障碍全面发育迟缓诊断价值

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漳州市体育旅游建设现状研究

漳州职业技术学院学报 2021年第3期23卷 55-60页

作者：曾咪李静雯薛秀云黄冬群漳州职业技术学院旅游管理学院福建漳州363000

体育旅游既是国民健康一项重要决策,亦是一种新型旅游业态。如何发展体育旅游提升国民素质与幸福指数,成为体育旅游面临的重要议题。通过调研,发现漳州体育旅游存在普及率不高,开发产品单一、多产业融合发展不足、推广度不高等问题,提... 详细信息

体育旅游既是国民健康一项重要决策,亦是一种新型旅游业态。如何发展体育旅游提升国民素质与幸福指数,成为体育旅游面临的重要议题。通过调研,发现漳州体育旅游存在普及率不高,开发产品单一、多产业融合发展不足、推广度不高等问题,提出科学统筹布局、打造区域特色拓展消费市场、推动多业融合、打造产业链、发挥区位优势、凸显港澳台合作、创新营销模式,培育优质专业人才等措施和建议。

关键词：体育旅游建设现状措施与建议

Neuropeptide cholecystokinin:a key neuromodulator for hippocampal functions

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Neural Regeneration Research 2025年第7期20卷 1991-1992页

作者： Fengwen huang Stephen Temitayo Bello Department of Neuroscience City University of Hong KongKowloon TongHong Kong Special Administrative RegionChina Center for Regenerative Medicine and Health Hong Kong Institute of Science&InnovationChinese Academy of SciencesHong Kong Special Administrative RegionChina

Spatial memory is crucial for survival within external surroundings and wild *** hippocampus,a critical hub for spatial learning and memory formation,has received extensive investigations on how neuromodulators shape its functions(Teixeira et al.,2018;Zhang et al.,2024).However,the landscape of neuromodulations in the hippocampal system remains poorly understood because most studies focus on classical monoamine neuromodulators,such as acetylcholine,serotonin,dopamine,and *** neuropeptides,comprising the most abundant neuromodulators in the central nervous system,play a pivotal role in neural information processing in the hippocampal ***(CCK),one of the most abundant neuropeptides,has been implicated in regulating various physiological and neurobiological statuses(Chen et al.,2019).CCK-A receptor(CCK-AR)and CCK-B receptors(CCK-BR)are two key receptors mediating the biological functions of CCK,both of which belong to class-A sevenfold transmembrane G protein-coupled receptors(Nishimura et al.,2015).CCK-AR preferentially reacts to sulfated CCK,whereas CCK-BR binds both CCK and gastrin with similar affinities(Ding et al.,2022).The expression patterns of CCK-AR and CCK-BR are distinct,implying that CCK has various functions in target *** instance,CCK-AR is widely expressed in the GI and brain subregions and is hence implicated in the control of digestive function and satiety ***,CCK-BR is abundantly and widely distributed in the central nervous system,which majorly regulates anxiety,learning,and memory(Ding et al.,2022).However,the roles of endogenous CCK and CCK receptors in regulating hippocampal function at electrophysiological and behavioral levels have received less attention.

关键词： abundant functions modulator

The role of axon guidance molecules in the pathogenesis of epilepsy

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Neural Regeneration Research 2025年第5期20卷 1244-1257页

作者： Zheng Liu Chunhua Pan Hao huang Department of Neurology Affiliated Hospital of Zunyi Medical UniversityZunyiGuizhou ProvinceChina

Current treatments for epilepsy can only manage the symptoms of the condition but cannot alter the initial onset or halt the progression of the disease. Consequently, it is crucial to identify drugs that can target novel cellular and molecular mechanisms and mechanisms of action. Increasing evidence suggests that axon guidance molecules play a role in the structural and functional modifications of neural networks and that the dysregulation of these molecules is associated with epilepsy susceptibility. In this review, we discuss the essential role of axon guidance molecules in neuronal activity in patients with epilepsy as well as the impact of these molecules on synaptic plasticity and brain tissue remodeling. Furthermore, we examine the relationship between axon guidance molecules and neuroinflammation, as well as the structural changes in specific brain regions that contribute to the development of epilepsy. Ample evidence indicates that axon guidance molecules, including semaphorins and ephrins, play a fundamental role in guiding axon growth and the establishment of synaptic connections. Deviations in their expression or function can disrupt neuronal connections, ultimately leading to epileptic seizures. The remodeling of neural networks is a significant characteristic of epilepsy, with axon guidance molecules playing a role in the dynamic reorganization of neural circuits. This, in turn, affects synapse formation and elimination. Dysregulation of these molecules can upset the delicate balance between excitation and inhibition within a neural network, thereby increasing the risk of overexcitation and the development of epilepsy. Inflammatory signals can regulate the expression and function of axon guidance molecules, thus influencing axonal growth, axon orientation, and synaptic plasticity. The dysregulation of neuroinflammation can intensify neuronal dysfunction and contribute to the occurrence of epilepsy. This review delves into the mechanisms associated with

关键词： axon guidance drug-resistant epilepsy epilepsy nerve regeneration nervous system diseases neural pathways neuroinflammatory diseases neuronal plasticity neurons synaptic remodeling

Toward Analytical Homogenized Relaxation Modulus for Fibrous Composite Material with Reduced Order Homogenization Method

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Computers, Materials & Continua 2025年第1期82卷 193-222页

作者： Huilin Jia Shanqiao huang Zifeng Yuan HEDPS Center for Applied Physics and Technology(CAPT)Department of Mechanics and Engineering SciencePeking UniversityBeijing100871China State Key Laboratory for Turbulence and Complex Systems Peking UniversityBeijing100871China

In this manuscript,we propose an analytical equivalent linear viscoelastic constitutive model for fiber-reinforced composites,bypassing general computational *** method is based on the reduced-order homogenization(ROH)*** ROH method typically involves solving multiple finite element problems under periodic conditions to evaluate elastic strain and eigenstrain influence functions in an‘off-line’stage,which offers substantial cost savings compared to direct computational homogenization *** to the unique structure of the fibrous unit cell,“off-line”stage calculation can be eliminated by influence functions obtained *** the standard solid model to the ROH method enables the creation of a comprehensive analytical homogeneous viscoelastic constitutive *** method treats fibrous composite materials as homogeneous,anisotropic viscoelastic materials,significantly reducing computational time due to its analytical *** approach also enables precise determination of a homogenized anisotropic relaxation modulus and accurate capture of various viscoelastic responses under different loading *** sets of numerical examples,including unit cell tests,three-point beam bending tests,and torsion tests,are given to demonstrate the predictive performance of the homogenized viscoelastic ***,the model is validated against experimental measurements,confirming its accuracy and reliability.

关键词： Homogenized relaxation modulus viscoelastic standard solid model reduced order homogenization fibrous composite material

Targeting TrkB–PSD-95 coupling to mitigate neurological disorders

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Neural Regeneration Research 2025年第3期20卷 715-724页

作者： Xin Yang Yu-Wen Alvin huang John Marshall Department of Molecular Biology Cell Biology and BiochemistryBrown UniversityProvidenceRIUSA Department of Neurology Warren Alpert Medical School of Brown UniversityProvidenceRIUSA Center for Translational Neuroscience Robert J.and Nancy D.Carney Institute for Brain Science and Brown Institute for Translational ScienceBrown UniversityProvidenceRIUSA

Tropomyosin receptor kinase B(TrkB)signaling plays a pivotal role in dendritic growth and dendritic spine formation to promote learning and *** activity-dependent release of brain-derived neurotrophic factor at synapses binds to pre-or postsynaptic TrkB resulting in the strengthening of synapses,reflected by long-term ***,the association of postsynaptic density protein-95 with TrkB enhances phospholipase Cγ-Ca^(2+)/calmodulin-dependent protein kinaseⅡand phosphatidylinositol 3-kinase-mechanistic target of rapamycin signaling required for long-term *** this review,we discuss TrkB-postsynaptic density protein-95 coupling as a promising strategy to magnify brain-derived neurotrophic factor signaling towards the development of novel therapeutics for specific neurological disorders.A reduction of TrkB signaling has been observed in neurodegenerative disorders,such as Alzheimer's disease and Huntington's disease,and enhancement of postsynaptic density protein-95 association with TrkB signaling could mitigate the observed deficiency of neuronal connectivity in schizophrenia and *** with brain-derived neurotrophic factor is problematic,due to poor pharmacokinetics,low brain penetration,and side effects resulting from activation of the p75 neurotrophin receptor or the truncated TrkB.T1 *** TrkB agonists and antibodies that activate TrkB are being intensively investigated,they cannot distinguish the multiple human TrkB splicing isoforms or cell type-specific *** TrkB–postsynaptic density protein-95 coupling provides an alternative approach to specifically boost TrkB signaling at localized synaptic sites versus global stimulation that risks many adverse side effects.

关键词： Angelman syndrome autism brain-derived neurotrophic factor depression neurodegenerative disorder neurodevelopmental disorder postsynaptic density protein-95 synaptic plasticity TrkB