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Early identification of stroke through deep learning with multi-modal human speech and movement data

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Neural Regeneration Research 2025年第1期20卷 234-241页

作者： Zijun Ou Haitao Wang bin zhang Haobang Liang Bei Hu Longlong Ren Yanjuan Liu Yuhu zhang Chengbo Dai Hejun Wu Weifeng Li Xin Li School of Computer Science and Engineering Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Department of Neurology Guangdong Neuroscience InstituteGuangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhouGuangdong ProvinceChina Department of Emergency Medicine Guangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhouGuangdong ProvinceChina

Early identification and treatment of stroke can greatly improve patient outcomes and quality of *** clinical tests such as the Cincinnati Pre-hospital Stroke Scale(CPSS)and the Face Arm Speech Test(FAST)are commonly used for stroke screening,accurate administration is dependent on specialized *** this study,we proposed a novel multimodal deep learning approach,based on the FAST,for assessing suspected stroke patients exhibiting symptoms such as limb weakness,facial paresis,and speech disorders in acute *** collected a dataset comprising videos and audio recordings of emergency room patients performing designated limb movements,facial expressions,and speech tests based on the *** compared the constructed deep learning model,which was designed to process multi-modal datasets,with six prior models that achieved good action classification performance,including the I3D,SlowFast,X3D,TPN,TimeSformer,and *** found that the findings of our deep learning model had a higher clinical value compared with the other ***,the multi-modal model outperformed its single-module variants,highlighting the benefit of utilizing multiple types of patient data,such as action videos and speech *** results indicate that a multi-modal deep learning model combined with the FAST could greatly improve the accuracy and sensitivity of early stroke identification of stroke,thus providing a practical and powerful tool for assessing stroke patients in an emergency clinical setting.

关键词： artificial intelligence deep learning diagnosis early detection FAST screening stroke

High-dose dexamethasone regulates microglial polarization via the GR/JAK1/STAT3 signaling pathway after traumatic brain injury

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Neural Regeneration Research 2025年第9期20卷 2611-2623页

作者： Mengshi Yang Miao Bai Yuan Zhuang Shenghua Lu Qianqian Ge Hao Li Yu Deng Hongbin Wu Xiaojian Xu Fei Niu Xinlong Dong bin zhang Baiyun Liu Beijing Tiantan Hospital Capital Medical UniversityBeijingChina Department of Neurology The First Hospital of Tsinghua UniversityBeijingChina Department of Neurotrauma and Beijing Key Laboratory of Central Nervous System Injury Beijing Neurosurgical InstituteCapital Medical UniversityBeijingChina Department of Critical Care Medicine Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Center for Nerve Injury and Repair Beijing Institute of Brain DisordersChina National Clinical Research Center for Neurological DiseasesBeijingChina

Although microglial polarization and neuroinflammation are crucial cellular responses after traumatic brain injury,the fundamental regulatory and functional mechanisms remain insufficiently *** potent anti-inflammato ry agents,the use of glucoco rticoids in traumatic brain injury is still controversial,and their regulatory effects on microglial polarization are not yet *** the present study,we sought to determine whether exacerbation of traumatic brain injury caused by high-dose dexamethasone is related to its regulatory effects on microglial polarization and its mechanisms of *** vitro cultured BV2 cells and primary microglia and a controlled cortical impact mouse model were used to investigate the effects of dexamethasone on microglial ***,dexamethasone,RU486(a glucocorticoid receptor antagonist),and ruxolitinib(a Janus kinase 1 antagonist)were ***-sequencing data obtained from a C57BL/6 mouse model of traumatic brain injury were used to identify potential targets of *** Morris water maze,quantitative reverse transcription-polymerase chain reaction,western blotting,immunofluorescence and confocal microscopy analysis,and TUNEL,Nissl,and Golgi staining were performed to investigate our ***-throughput sequencing results showed that arginase 1,a marker of M2 microglia,was significantly downregulated in the dexamethasone group compared with the traumatic brain injury group at3 days post-traumatic brain *** dexamethasone inhibited M1 and M2 microglia,with a more pronounced inhibitory effect on M2microglia in vitro and in *** receptor plays an indispensable role in microglial polarization after dexamethasone treatment following traumatic brain ***,glucocorticoid receptor activation increased the number of apoptotic cells and neuronal death,and also decreased the density of dendritic spines.A possible downstream receptor signaling mechanism is th

关键词： apoptosis BV2 microglia dexamethasone glucocorticoid receptor glucocorticoids innate immune system microglial polarization neuroinflammation primary microglia traumatic brain injury

基于2018-2022年国家自然科学基金结题项目分析干细胞研究现状

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中国组织工程研究 2025年第19期29卷 4145-4150页

作者：蒋君张玢中国医学科学院医学信息研究所北京市100005

背景:目前大多数研究从国家自然科学基金资助论文和项目申请角度出发,对干细胞某一方面进行深入分析,或者验证某种评价方法,缺乏对干细胞领域国家自然科学基金已结题项目的全面分析。目的:了解2018-2022年干细胞领域国家自然科学基金结... 详细信息

背景:目前大多数研究从国家自然科学基金资助论文和项目申请角度出发,对干细胞某一方面进行深入分析,或者验证某种评价方法,缺乏对干细胞领域国家自然科学基金已结题项目的全面分析。目的:了解2018-2022年干细胞领域国家自然科学基金结题项目资助情况及研究热点,为后续研究提供参考。

关键词：干细胞国家自然科学基金聚类分析研究热点文献计量学

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机器人砂带磨削路径优化插补算法

中国机械工程 2018年第8期29卷 983-990页

作者：张铁张斌华南理工大学机械与汽车工程学院广州510641

为解决经典泰勒插补算法生成的加工轨迹在加工中产生的过切问题,在机器人打磨离线编程系统上进行了机器人打磨路径插补算法的研究。通过对比各种路径刀位点生成方法,提出一种改进的泰勒插补算法。该算法在加工路径曲率变化较大的区域刀... 详细信息

为解决经典泰勒插补算法生成的加工轨迹在加工中产生的过切问题,在机器人打磨离线编程系统上进行了机器人打磨路径插补算法的研究。通过对比各种路径刀位点生成方法,提出一种改进的泰勒插补算法。该算法在加工路径曲率变化较大的区域刀位点自适应地致密,避免了弓高误差超差引起的过切;当加工路径较为平滑时,刀位点稀疏,保证加工效率。通过设计优化算法与经典算法的对比磨削试验,验证了该插补算法的有效性。

关键词：机器人磨削路径泰勒公式插补

Ultralight and superelastic MXene/reduced graphene oxide aerogels for electromagnetic interference shielding

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Nano Research 2025年第1期18卷 1-9页

作者： Xinfeng Zhou Yang Dai Guoyao Yue Yiman zhang Lulu Li Zhong-Zhen Yu Peng Min Hao-bin zhang 21 State Key Laboratory of Organic-Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of Advanced Functional Polymer Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China Present address:BOE Technology Innovation Center BOE Technology Group Co.Ltd.Beijing 100176China Xi’an Modern Chemistry Research Institute Xi’an 710065China

Lightweight aerogels feature multifunctionality and a high porosity,yet accompanied with poor structure recovery under large strain *** this work,we develop an air bubble-ice crystal dual template and annealing strategy to integrate low density and high resilience for the conductive transition metal carbides/nitrides(MXene)composite *** air bubbles and ice crystals synergistically exclude the nanosheets to the gas-liquid interfaces,thereby constructing unique Y-shaped junctions and robust *** annealing process greatly enhances the interlayer *** external load,the Yshaped structures prevent the stress concentration at the junctions by transferring the forces to the skeleton for maintaining structural *** addition,the wrinkled and thick cell walls,together with the enhanced interlayer interactions,endow the aerogel with exceptional structural stability and *** a result,the MXene/reduced graphene oxide(RGO)composite aerogels exhibit superelasticity with reversible compressive strains of up to 95%.In addition,the electron bridging effect of the RGO sheets affords the aerogel to deliver excellent electromagnetic interference shielding performance,as high as 46.3 dB at 2.5 ***,the remarkable reshapeability of the aerogels allows for precise regulation of structure and performance(33.5-75.1 dB)by a simple wetting compression *** summary,this work offers helpful inspirations for developing lightweight and superelasticity aerogels for extensive applications.

关键词： lightweight superelasticity MXene aerogel electromagnetic interference shielding reshapeability

Periodic Variation Studies of the Two Short Period W UMa-type Eclipsing binaries: LX Lyn and V0853 Aur

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Research in Astronomy and Astrophysics 2024年第1期24卷 273-284页

作者： Xu zhang bin zhang School of Physics and Electronic Science Guizhou Normal UniversityGuiyang 550001China Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing Guizhou Normal UniversityGuiyang 550025China

In this paper,new light curves(LCs) of contact eclipsing binary(CEB) systems LX Lyn and V0853 Aur are presented and analyzed by using the 2015 version of the Wilson-Devinney(W-D) *** order to explain their asymmetric LCs,cool starspots on the components were *** is suggested that their fill-out degrees are f=12.0%(LX Lyn) and f=26.3%(V0853 Aur).At the same time,we found that LX Lyn is a W-type eclipsing binary(EB) with an orbital inclination of i=84°.88 and a mass ratio of q=2.31.V0853 Aur is also a W-type CEB with a mass ratio of q=2.77 and an orbital inclination of i= 79°.*** on all available times of light minimum,their orbital period changes are studied by using the O-C *** O-C diagram of LX Lyn reveals a cyclic oscillation with a period of about 14.84 yr and an amplitude of 0.0019 days,which can be explained by the light-travel time effect(LTTE) due to the presence of a third body with a minimum mass of0.06M_⊙.For V0853 Aur,it is discovered that the O-C diagram of the system also shows a cyclic oscillation with a period of 9.64 yr and an amplitude of 0.03365 *** cyclic oscillation of V0853 Aur can be attributed to the LTTE by means of a third body with a mass no less than 3.77M_⊙.The third body may play an important role in the formation and evolution of these systems.

关键词： stars:activity (stars:)binaries(including multiple):close (stars:)binaries:eclipsing (stars:)brown dwarfs stars:evolution stars:formation

Ethylene-bridged Indenyl-fluorenyl Metallocene Complexes for Efficient Preparation of Allyl-terminated Propylene Oligomers and Polymers via Selective β-Methyl Transfer

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Chinese Journal of Polymer Science 2019年第6期37卷 578-590页

作者： Lei zhang bin zhang Haiyan Ma Shanghai Key Laboratory of Functional Materials Chemistry and Laboratory of Organometallic Chemistry School of Chemistry and Molecular EngineeringEast China University of Science and Technology

Four C_1-symmetric ansa-metallocene complexes, C_2H_4(Ind)(2,7-~tBu_2-Flu)ZrCl_2(4), C_2H_4(3-Bn-Ind)(2,7-~tBu_2-Flu)ZrCl_2(5),C_2H_4(3-Bn-Ind)(3,6-~tBu_2-Flu)ZrCl_2(6), and C_2H_4(3-Bn-Ind)(2,7-~tBu_2-Flu)HfCl_2(7), were synthesized and characterized. The structures of complexes 4, 5, and 7 were further determined via X-ray diffraction studies. Upon activation with modified methylaluminoxane(MMAO) or Al^iBu_3/[Ph_3C][B(C_6F_5)_4](TIBA/TrB), most of these complexes showed high efficiency in catalyzing propylene oligomerization/polymerization to afford products dominantly with allyl terminals via selective β-methyl transfer(β-Me transfer). The introduction of 3-benzyl group on the indenyl ring of the complexes was found to be crucial in enabling highly selective β-Me transfer during the polymerization process, leading to selectivities up to 89% obtained by zirconocene complexes 5 and 6, and up to 91% obtained by hafnocene complex 7. Detailed chain-end analysis by ~1H-NMR, ^(13)C-NMR, and MALDI-TOF mass spectroscopy revealed that the allyl chain-ends of the polymeric products resulted from a selective β-Me transfer process after two successively primary insertions of the monomer. Further studies concerning the dependence of chain release selectivity as well as the molecular weight of products on monomer concentration suggested that both β-Me transfer(major) and β-hydrogen transfer(β-H transfer)(minor) mediated by 5/MMAO and 6/MMAO systems may mainly operate in a bimolecular pathway.

关键词： Metallocene Ethylene-bridged indenyl-fluorenyl ligand Propylene Oligo-/polymerization β-Methyl transfer

Encrypting Chemical Reactivity in Protein Sequences toward Information-Coded Reactions

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Chinese Journal of Chemistry 2020年第8期38卷 864-878页

作者： Fan zhang Wen-bin zhang Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry&Physics of Ministry of EducationCenter for Soft Matter Science and EngineeringCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

Contents *** *** Occurring Covalent Crosslinks in Proteins *** Encoded Protein Coupling Reactions *** *** engineering *** bioconjugation ***-based biomaterials *** biology *** from Nature:Information-Coded Chemical Reactions *** and Perspectives *** Controlling chemical reactivity has been a central theme in *** ways to manipulate reactivity include varying concentration and/or temperature,putting the bonds under tension,or changing the electronic states by neighboring substituents,*** the Information Age,one may wonder if information about chemical reactivity could be somehow encrypted in the chemical structure in a simple and straightforward way to allow for facile tailoring of reactivity toward intelligent design ofcompounds and reactions.

关键词： reactivity straight bonds

人脐带间充质干细胞来源外泌体治疗SD大鼠骨质疏松性股骨骨折

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中国组织工程研究 2025年第31期29卷 6634-6641页

作者：卜宪敏梁迪张斌徐英杰丁豪吴彬田荣华济宁市第一人民医院病理科山东省济宁市272067 济宁医学院临床医学院山东省济宁市272067 济宁医学院附属医院检验科山东省济宁市272067 济宁医学院附属医院创伤骨科山东省济宁市272067

背景:人脐带间充质干细胞来源外泌体已广泛用于骨修复和重建研究,能显著促进成骨和血管生成。目的:探究人脐带间充质干细胞来源外泌体治疗骨质疏松性骨折的机制。方法:采用组织块培养法提取人脐带间充质干细胞及超速离心法提取人脐带间... 详细信息

背景:人脐带间充质干细胞来源外泌体已广泛用于骨修复和重建研究,能显著促进成骨和血管生成。目的:探究人脐带间充质干细胞来源外泌体治疗骨质疏松性骨折的机制。方法:采用组织块培养法提取人脐带间充质干细胞及超速离心法提取人脐带间充质干细胞来源外泌体并进行鉴定。30只12周龄雌性SD大鼠随机分为假手术组(6只)和去势组(24只)。去势组采用经典的去势法构建骨质疏松模型,术后12周随机选取去势组6只大鼠与假手术组6只大鼠行Micro-CT及苏木精-伊红染色进行模型验证。验证骨质疏松模型构建成功后,将去势组剩余18只大鼠随机分为3组,均构建骨质疏松性股骨骨折模型,骨折端分别注射PBS(PBS组)、1.5×10^(11)particles/mL(低浓度外泌体组)、3×10^(11)particles/mL(高浓度外泌体组)外泌体。骨折术后4周行影像学及组织学观察评估骨折愈合和骨组织血管生成情况。结果与结论:①大体标本观察:与PBS组相比,外泌体组骨折愈合速度明显增快,骨折端骨痂生成量显著增加;②X射线片评分:外泌体组显著高于PBS组,差异有显著性意义(P<0.05);③Micro-CT三维成像:与PBS组相比,外泌体组骨折愈合加快,骨痂生成量显著增加;外泌体组骨体积分数显著高于PBS组,差异有显著性意义(P<0.01);④苏木精-伊红染色和Masson染色:与PBS组相比,外泌体组有更多的骨小梁生成,有更多的新生骨组织生长;⑤免疫组织化学染色:与PBS组相比,外泌体组骨钙素与CD31的表达更加显著;高浓度外泌体组较低浓度外泌体组新生血管密度更大,骨痂生成量更多,骨折愈合增快,呈现浓度依赖性。结果表明,人脐带间充质干细胞来源外泌体可通过促进血管生成和成骨,最终促进骨质疏松性骨折修复,其机制可能与CD31和骨钙素表达增加有关。

关键词：骨质疏松性骨折人脐带间充质干细胞外泌体骨折愈合骨钙素 CD31

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