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j.urnal of Thermal Science 2024年第2期33卷 501-508页

作者： LI Weiwei MIAO Qi ZHANG Yelong DING Hongliang YANG sa LAI Yuan FENG Daili DING Yulong j.N Yi TAN Linghua School of Chemistry and Chemical Engineering Nanjing University of Science&TechnologyNanjing210094China National Special Superfine Powder Engineering Research Center Nanjing University of Science and TechnologyNanjing210094China Nanj.ng j.nhe Energy Material Co. LtdNanjing210047China School of Chemical Engineering University of BirminghamBirminghamB152TTUK School of Energy&Environmental Engineering University of Science and Technology BeijingBeijing100083China

In this paper,a novel ternary eutectic salt Na_(2)CO_(3)-Li_(2)CO_(3)-LiF was designed and investigated for concentrated solar power(CSP).The Factsage software was used to predict the composition and eutectic point of Na_(2)CO_(3)-Li_(2)CO_(3)-LiF.The microstructure,thermophysical properties,and thermal stability of eutectic salts were experimentally measured using various analytical methods.With a mass ratio of 57%:32%:11%,the eutectic salt exhibited excellent thermal storage properties with a fusion enthalpy of 413 j.g and a melting point of 426.8℃.The excellent thermal stability of the eutectic salt was reflected by a weight loss of only 0.8% at 600℃.

关键词： phase change materials ternary eutectic salt latent heat thermal stability

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贵州苦苣苔科植物新种资料(8)

贵州科学 2024年第1期42卷 17-21页

作者：李飒汤升虎贵州省植物园贵州贵阳550000

贵州地处中国西南,苦苣苔科植物物种丰富,近年来有若干个新种在贵州被发现,并被合格发表。为了让研究人员、学生更好地理解贵州植物区系,现逐步将这些新类群进行介绍。本篇收录了德江石蝴蝶Petrocosmea dej.angensis Sheng H.Tang&j.an... 详细信息

贵州地处中国西南,苦苣苔科植物物种丰富,近年来有若干个新种在贵州被发现,并被合格发表。为了让研究人员、学生更好地理解贵州植物区系,现逐步将这些新类群进行介绍。本篇收录了德江石蝴蝶Petrocosmea dej.angensis Sheng H.Tang&j.an Xu、盘州石蝴蝶Petrocosmea panzhouensis Sheng H.Tang&T.Peng、开阳半蒴苣苔Hemiboea kaiyangensis T.Peng&S.Z.He以及黔渝马铃苣苔Oreocharis qianyuensis Lei Cai,j.W.Yang&Q.Zhang。

关键词：新分类群石蝴蝶属半蒴苣苔属马铃苣苔属贵州植物区系

电针对急性心肌梗死大鼠心肌电重构的影响及其机制研究

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针刺研究 2024年第2期49卷 155-163页

作者：萨喆燕潘晓华朱小香兰彩莲万隆罗来许金森福建省中医药科学院经络研究所福建省经络感传重点实验室福州350003

目的:探讨电针“内关”通过增强瞬时外向钾电流(Ito)改善急性心肌梗死大鼠心肌电重构的作用机制。方法:雄性SD大鼠随机分成对照组、模型组和电针组,每组10只。采用皮下注射异丙肾上腺素(85 mg/kg)诱导急性心肌梗死模型。电针组造模24 h... 详细信息

目的:探讨电针“内关”通过增强瞬时外向钾电流(Ito)改善急性心肌梗死大鼠心肌电重构的作用机制。方法:雄性SD大鼠随机分成对照组、模型组和电针组,每组10只。采用皮下注射异丙肾上腺素(85 mg/kg)诱导急性心肌梗死模型。电针组造模24 h后电针左侧“内关”,每次20 min,每日1次,连续5 d。TTC染色观察心肌坏死情况;HE染色观察心肌组织病理形态、测量心肌细胞横截面积;心电图记录ST段高度、QT间期(QT)、校正QT间期(QTc),计算QT间期离散率(QTd)和校正QT间期离散率(QTcd);RNA测序法检测心肌组织钾离子通道相关基因表达差异;实时荧光定量PCR法和Western blot法分别检测心肌组织Kchip2、Kv4.2的mRNA和蛋白表达。结果:TTC染色可见对照组心肌呈红色,模型组大鼠心肌大部分呈白色缺血样改变,电针组仅见心尖处心肌组织呈白色。与对照组比较,模型组大鼠心肌细胞横截面积显著增大(P<0.01),ST段显著抬高(P<0.01),QT、QTc、QTd和QTcd均显著增加(P<0.05,P<0.01);与模型组比较,电针组大鼠心肌细胞横截面积显著减小(P<0.01),ST段显著下降(P<0.01),QT、QTc、QTcd和QTd均显著减少(P<0.01,P<0.05)。RNA测序共筛选出20个3组共同表达的钾离子通道相关基因,电针组与模型组比较,其中Kchip2上调差异倍数最大。与对照组比较,模型组大鼠心肌组织Kchip2、Kv4.2 mRNA和蛋白表达均显著降低(P<0.01,P<0.05);与模型组比较,电针组大鼠心肌组织Kchip2、Kv4.2 mRNA和蛋白表达均显著升高(P<0.01,P<0.05)。结论:电针可改善心肌梗死大鼠心肌电重构,其机制可能与增加Ito主要成分Kchip2、Kv4.2表达有关。

关键词：电针心肌梗死心肌电重构瞬时外向钾电流

Reliability measure approach considering mixture uncertainties under insufficient input data

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j.urnal of Zhej.ang University-Science A(Applied Physics & Engineering) 2023年第2期24卷 146-161页

作者： Zhenyu LIU Yufeng LYU Guodong sa j.anrong TAN State Key Laboratory of CAD&CG Zhejiang UniversityHangzhou 310058China Ningbo Research Institute Zhejiang UniversityNingbo 315100China Laboratory of Healthy&Intelligent Kitchen System Integration of Zhej.ang Province Ningbo 315336China School of Mechanical Engineering Zhejiang UniversityHangzhou 310058China

Reliability analysis and reliability-based optimization design require accurate measurement of failure probability under input uncertainties.A unified probabilistic reliability measure approach is proposed to calculate the probability of failure and sensitivity indices considering a mixture of uncertainties under insufficient input data.The input uncertainty variables are classified into statistical variables,sparse variables,and interval variables.The conservativeness level of the failure probability is calculated through uncertainty propagation analysis of distribution parameters of sparse variables and auxiliary parameters of interval variables.The design sensitivity of the conservativeness level of the failure probability at design points is derived using a semi-analysis and sampling-based method.The proposed unified reliability measure method is extended to consider p-box variables,multi-domain variables,and evidence theory variables.Numerical and engineering examples demonstrate the effectiveness of the proposed method,which can obtain an accurate confidence level of reliability index and sensitivity indices with lower function evaluation number.

关键词： Insufficient data Reliability index Sensitivity analysis Sparse variable Uncertainty propagation

Tunable nano-engineered anisotropic surface for enhanced mechanotransduction and soft-tissue integration

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Nano Research 2023年第5期16卷 7293-7303页

作者： Pingping Han Tianqi Guo Anj.na j.yasree Guillermo A.Gomez Karan Gulati sašo Ivanovski The University of Queensland School of DentistryEpigenetics nanodiagnostic and therapeutic groupCenter for Oral-facial RegenerationRehabilitation and Reconstruction(COR3)BrisbaneQueensland 4006Australia The University of Queensland School of DentistryBrisbaneQueensland 4006Australia The University of Queensland School of DentistryGroup for Anodized Therapies for OsseointegrationRegeneration and StimulationCenter for Oral-facial RegenerationRehabilitation and Reconstruction(COR3)BrisbaneQueensland 4006Australia Centre for Cancer Biology South Australia Pathology and the University of South AustraliaAdelaideSouth Australia 5001Australia

Electrochemically engineered titania(TiO_(2))nanopores enable tailored cellular function;however,the cellular mechanosensing mechanisms dictating the cell response and soft tissue integration are yet to be elucidated.Here,we report the fabrication of anisotropic TiO_(2)nanopores with diameters of 46 and 66 nm on microrough titanium(Ti)via electrochemical anodization,towards short-and long-term guidance of human primary gingival fibroblasts(hGFs).Cells on tissue culture plates and bare Ti substrates were used as controls.Notably,we show that nanopores with a diameter of 66 nm induced more mature focal adhesions of vinculin and paxillin at the membrane,encouraged the development of actin fibers at focal adhesion sites,led to elongated cell and nuclear shape.These topographical-driven changes were attributed to the Ras-related C3 botulinum toxin substrate 1(Rac 1)GTPase pathway and nuclear localisation of LAMIN A/C and yes-associated protein(YAP)and associated with increased ligament differentiation with elevated expression of the ligament marker Mohawk homeobox(MKX).Study findings reveal that minor tuning of nanopore diameter is a powerful tool to explore intracellular and nuclear mechanotransduction and gain insight into the relationships between nanomaterials and mechanoresponsive cellular elements.

关键词： titanium nanopores nanotopography fibroblast mechanosensing mechanotransduction ligament differentiation

影像三维重建安全辅助单孔分体内镜治疗L_(5)/S_(1)极外侧腰椎间盘突出症

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中国组织工程研究 2025年第9期29卷 1876-1882页

作者：冯志萌孙宁孙兆忠李岳飞刘昌震李洒滨州医学院附属医院脊柱外科山东省滨州市256603

背景:单孔分体内镜作为一种新型的内镜技术,适用于治疗极外侧腰椎间盘突出症。但目前国内外针对L_(5)/S_(1)这一发病率极低的极外侧腰椎间盘突出症的研究资料甚少,尚无详尽描述单孔分体内镜治疗L_(5)/S_(1)极外侧腰椎间盘突出症的影像... 详细信息

背景:单孔分体内镜作为一种新型的内镜技术,适用于治疗极外侧腰椎间盘突出症。但目前国内外针对L_(5)/S_(1)这一发病率极低的极外侧腰椎间盘突出症的研究资料甚少,尚无详尽描述单孔分体内镜治疗L_(5)/S_(1)极外侧腰椎间盘突出症的影像解剖学资料。目的:通过影像三维重建确定骨性标志点,并以该标志点准确定位L_(5)出口神经根、L_(5)/S_(1)椎间隙及其他结构之间的位置关系,辅助单孔分体内镜经后外侧入路实现对L_(5)出口神经根的减压,治疗L_(5)/S_(1)极外侧腰椎间盘突出症。方法:选择符合纳入标准的29例L_(5)/S_(1)单侧极外侧腰椎间盘突出症患者,其中男12例,女17例;年龄48-74岁。将患者的腰椎CT数据资料导入Mimics 21.0软件中重建腰椎三维模型。测量L_(5)/S_(1)相关参数:①在横突根部下缘与峡部外侧缘的交点(H)所在矢状面上测量:H分别至L_(5)出口神经根上缘、下缘的垂直距离(a1,a2);H分别至L_(5)下终板、S1上终板的垂直距离(b1,b2);H至L_(5)椎弓根下缘的垂直距离(c);②H至L_(5)椎弓根内侧壁所在矢状面的左右水平距离(d);③H至硬脊膜外侧缘所在矢状面的左右水平距离(e);④H至L_(5)下终板最外侧缘所在矢状面的左右水平距离(f);⑤在L_(5)下终板最外侧缘所在矢状面上测量:H所在横断面分别至L_(5)出口神经根上缘、下缘的垂直距离(g1,g2);H所在横断面分别至L_(5)下终板、S1上终板的垂直距离(h1,h2);⑥H至L_(5)出口神经根最后缘所在冠状面的前后水平距离(i);⑦骶骨翼后缘最高点至L_(5)下终板最后缘所在冠状面的前后水平距离(j.。结果与结论:①男女之间各相关测量参数相比差异无显著性意义(P>0.05);②a1,a2,b1,b2,c,d,e,f,h1,h2,g1,g2,i,j.侧与健侧相比差异无显著性意义(P>0.05);③观测发现,a1与c之间相比差异无显著性意义(P>0.05),表明椎弓根下缘即为L_(5)出口神经根上缘,L_(5)出口神经根紧贴椎弓根下缘并经L_(5)椎体后方向前外侧走行,H均位于L_(5)出口神经根上方;④以H作为骨性标志点,无需向上探查,无需磨除峡部,只需向下、向外侧磨除部分骨质显露L_(5)出口神经根与椎间隙,向内侧有足够的安全距离避免损伤硬脊膜来完成侧隐窝、椎间孔区域的探查减压;⑤术者可在H、L_(5)下终板最外侧缘所在的矢状面及L_(5)横突与骶骨翼构成的“矩形区域”内进行操作,越靠近内下方区域(Kambin三角)越安全;⑥提示单孔分体内镜经后外侧入路治疗L_(5)/S_(1)极外侧腰椎间盘突出症,在镜下以H作为骨性标志点定位L_(5)出口神经根及椎间隙,能实现对L_(5)出口神经根的精准、安全、有效减压。

关键词：极外侧腰椎间盘突出症单孔分体内镜影像三维重建骨性标志数字化软件

A comparison of sensitivity indices for tolerance design of a transmission mechanism

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j.urnal of Zhej.ang University-Science A(Applied Physics & Engineering) 2022年第7期23卷 527-542页

作者： Zhen-yu LIU Han-chao XU Guo-dong sa Yu-feng LYU j.an-rong TAN State Key Laboratory of CAD&CG Zhejiang UniversityHangzhou310027China Ningbo Research Institute Zhejiang UniversityNingbo315100China School of Mechanical Engineering Zhejiang UniversityHangzhou310027China Polytechnic Institute Zhejiang UniversityHangzhou310027China

Sensitivity analysis is used to quantify the contribution of the uncertainty of input variables to the uncertainty of systematic output responses.For tolerance design in manufacturing and assembly,sensitivity analysis is applied to help designers allocate tolerances optimally.However,different sensitivity indices derived from different sensitivity analysis methods will always lead to conflicting results.It is necessary to find a sensitivity index suitable for tolerance allocation to transmission mechanisms so that the sensitivity results can truly reflect the effects of tolerances on kinematic and dynamic performances.In this paper,a variety of sensitivity indices are investigated and compared based on hybrid simulation.Firstly,the hybrid simulation model of the crank-slider mechanism is established.Secondly,samples of the kinematic and dynamic responses of the mechanism with j.int clearances and link length errors are obtained,and the surrogate model established using polynomial chaos expansion(PCE).Then,different sensitivity indices are calculated based on the PCE model and are further used to evaluate the effect of j.int clearances and link length errors on the output response.Combined with the tolerance-cost function,the corresponding tolerance allocation schemes are obtained based on different sensitivity analysis results.Finally,the kinematic and dynamic responses of the mechanism adopting different tolerance allocation schemes are simulated,and the sensitivity index corresponding to the optimal response is determined as the most appropriate index.

关键词： Transmission mechanism Sensitivity analysis Tolerance allocation Hybrid simulation Polynomial chaos expansion(PCE)

Impact of device resistances in the performance of graphene‑based terahertz photodetectors

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Frontiers of Optoelectronics 2024年第2期17卷 87-97页

作者： O.Castelló Sofía M.López Baptista K.Watanabe T.Taniguchi E.Diez j.E.Velázquez-Pérez Y.M.Meziani j.M.Caridad j.A.Delgado-Notario Department of Applied Physics University of Salamanca37008 SalamancaSpain Unidad de Excelencia en Luz y Materia Estructurada(LUMES) University of Salamanca37008 SalamancaSpain Research Center for Electronic and Optical Materials National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan Research Center for Materials Nanoarchitectonics National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan Nanotechnology Group USAL-NanolabUniversity of Salamanca37008 SalamancaSpain

In recent years,graphene field-effect-transistors(GFETs)have demonstrated an outstanding potential for terahertz(THz)photodetection due to their fast response and high-sensitivity.Such features are essential to enable emerging THz applications,including 6G wireless communications,quantum information,bioimaging and security.However,the overall performance of these photodetectors may be utterly compromised by the impact of internal resistances presented in the device,so-called access or parasitic resistances.In this work,we provide a detailed study of the influence of internal device resistances in the photoresponse of high-mobility dual-gate GFET detectors.Such dual-gate architectures allow us to fine tune(decrease)the internal resistance of the device by an order of magnitude and consequently demonstrate an improved responsivity and noise-equivalent-power values of the photodetector,respectively.Our results can be well understood by a series resistance model,as shown by the excellent agreement found between the experimental data and theoretical calculations.These findings are therefore relevant to understand and improve the overall performance of existing high-mobility graphene photodetectors.

关键词： Graphene THz Photodetector Field-effect transistor Plasmonic

An interpretable machine learning strategy for pursuing high piezoelectric coefficients in (K_(0.5)Na_(0.5))NbO_(3)-based ceramics

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npj.Computational Materials 2023年第1期9卷 1-11页

作者： Bowen Ma Xiao Wu Chunlin Zhao Cong Lin Min Gao Baisheng sa Zhimei Sun College of Materials Science and Engineering Fuzhou UniversityFuzhou 350108China School of Materials Science and Engineering Beihang UniversityBeijing 100191China

Perovskite-type lead-free piezoelectric ceramics allow access to illustrious piezoelectric coefficients(d33)through intricate composition design and experimental modulation.Developing a swift and accurate technology for identifying(K,Na)NbO_(3)(KNN)-based ceramic compositions with high d33 in exceedingly large“compositional”space will establish an innovative research paradigm surpassing the traditional empirical trial-and-error method.Herein,we demonstrate an interpretable machine learning(ML)framework for quick evaluation of KNN-based ceramics with high d33 based on data from published literature.Specifically,a thorough feature construction was carried out from the global and local dimensions to establish tree regression models with d33 as the target property.Subsequently,the feature-property mapping rules of KNN-based piezoelectric ceramics are further optimized through feature screening.To intuitively understand the correlation mechanisms between ML regression targets and features,the sure independence screening and sparsifying operator(SISSO)method was employed to extract the essential descriptors to explain d33.A straightforward descriptor,e^((NMB-MVB))·ST=(IDA)^(2),consisting of only four easily accessible parameters,can accelerate the evaluation of a series of novel KNN-based ceramics with high d33 while exhibiting strong theoretical interpretability.This work not only provides a tool for the rapid discovery of high piezoelectric performance in KNN-based ceramics but also offers a data-driven route for the design of property descriptors in perovskites.

关键词： ceramics ceramic piezoelectric

Flexible and ultrathin dopamine modified MXene and cellulose nanofiber composite films with alternating multilayer structure for superior electromagnetic interference shielding performance

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Frontiers of physics 2023年第3期18卷 155-166页

作者： Qiugang Liao Hao Liu Ziqiang Chen Yinggan Zhang Rui Xiong Zhou Cui Cuilian Wen Baisheng sa Multiscale Computational Materials Facility and Key Laboratory of Eco-materials Advanced TechnologyCollege of Materials Science and EngineeringFuzhou UniversityFuzhou 350100China College of Materials Fujian Provincial Key Laboratory of Theoretical and Computational ChemistryXiamen UniversityXiamen 361005China

With the development of modern electronics,especially the next generation of wearable electromagnetic interference(EMI)shielding materials requires flexibility,ultrathin,lightweight and robustness to protect electronic devices from radiation pollution.In this work,the flexible and ultrathin dopamine modified MXene@cellulose nanofiber(DM@CNF)composite films with alternate multilayer structure have been developed by a facile vacuum filtration induced self-assembly approach.The multilayered DM@CNF composite films exhibit improved mechanical properties compared with the homogeneous DM/CNF film.By adj.sting the layer number,the multilayered DM3@CNF2 composite film exhibits a tensile strength of 48.14 MPa and a toughness of 5.28 Mj.m^(–3) with a thickness about 19μm.Interestingly that,the DM@CNF film with annealing treatment achieves significant improvement in conductivity(up to 17264 S·m^(–1))and EMI properties(SE of 41.90 dB and SSE/t of 10169 dB·cm^(2)·g–1),which still maintains relatively high mechanical properties.It is highlighted that the ultrathin multilayered DM@CNF film exhibits superior EMI shielding performance compared with most of the metal-based,carbon-based and MXene-based shielding materials reported in the literature.These results will offer an appealing strategy to develop the ultrathin and flexible MXene-based materials with excellent EMI shielding performance for the next generation intelligent protection devices.

关键词： MXene dopamine cellulose nanofibers electromagnetic interference shielding performance mechanical properties