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Chinese Journal of Polymer Science 2024年第10期42卷 1566-1577,I0014页

作者： Shu-juan Wang Lu Wang Hong-Zhe su Zhi-Cheng wu Qiao-Gen Zhang Wei Fan Xin-Li Jing School of Chemistry Joint Innovation Center of Thermal Protection MaterialsXi’an Jiaotong UniversityXi’an710049China School of Electrical Engineering Xi’an Jiaotong UniversityXi’an710049China School of Textile Science and Engineering Xi’an Polytechnic UniversityXi’an710048China

Polydimethylsiloxane(PDMS)is an electron-withdrawing material that is widely used in triboelectric nanogenerators(TENGs).However,PDMS has poor mechanical properties after curing and is easily damaged when subjected to long-term ***,the long-term stable operation of TENGs under mechanical deformation cannot be *** this work,multiple hydrogen bonds and aromatic disulfide bonds were introduced into PDMS *** elastomers exhibited high toughness(a tensile strength of 1.91 MPa and an elongation at break of 340%),good recyclability,and room-temperature self-healing properties(healing efficiency of 96.4%in 24 h).Recyclable sandwich-like triboelectric nanogenerators with excellent electrical output performance(13.5 V)and room-temperature self-healing performance(24 h,98%recovery of self-generating performance)were prepared by utilizing the hydrogen bonding between the PDMS elastomer and *** work reported herein offers theoretical guidance and a compelling strategy for developing high-performance TENG negative friction layers.

关键词： Polydimethylsiloxane Aromatic disulfide bonds Hydrogen bonds Room temperature self-healing Triboelectric nanogenerator

基于固定化金属亲和整体柱的痕量微囊藻毒素富集分析

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分析测试学报 2025年第1期44卷 155-162,171页

作者：陈小燕杨玲苏立燊吴晓苹福州大学化学学院食品安全与生物分析教育部重点实验室福建福州350116 泉州市晋江环境监测站福建泉州362200 福建省妇幼保健院福建福州350001

基于固定化金属亲和色谱(IMAC)识别原理,采用后修饰法在热引发自由基聚合反应得到的有机基质整体柱上直接固定Cu^(2+),设计并合成表征了poly(VIM-co-DVB)-Cu^(2+)亲和毛细管整体柱,用于微囊藻毒素(MCs)的富集研究。详细优化了亲和整体... 详细信息

基于固定化金属亲和色谱(IMAC)识别原理,采用后修饰法在热引发自由基聚合反应得到的有机基质整体柱上直接固定Cu^(2+),设计并合成表征了poly(VIM-co-DVB)-Cu^(2+)亲和毛细管整体柱,用于微囊藻毒素(MCs)的富集研究。详细优化了亲和整体柱的萃取条件,在最优条件下,将poly(VIM-co-DVB)-Cu^(2+)整体柱用于毛细管微萃取(CME),并与高效液相色谱-质谱(HPLC-MS)检测技术联用,建立了环境水样品中3种MCs的高效富集分析方法。方法检出限为0.89~1.23 ng/L,加标回收率为80.0%~105%,相对标准偏差(RSD)不大于6.8%。该方法灵敏度高、准确性好,可为污染水体中微囊藻毒素的监测分析提供有效手段。

关键词：微囊藻毒素固定化金属亲和整体柱毛细管微萃取高效液相色谱-质谱

A Vertex-Centered and Positivity-Preserving Finite Volume Scheme for Two-Dimensional Three-Temperature Radiation Diffusion Equations on General Polygonal Meshes

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Numerical Mathematics(Theory,Methods and Applications) 2020年第1期13卷 220-252页

作者： Shuai su Jiming wu Graduate School of China Academy of Engineering Physics Beijing 100088China Institute of Applied Physics and Computational Mathematics P.O.Box 8009Beijing 100088China

Two-dimensional three-temperature(2-D 3-T)radiation diffusion equa-tions are widely used to approximately describe the evolution of radiation energy within a multimaterial system and explain the exchange of energy among electrons,ions and *** this paper,we suggest a new positivity-preserving finite volume scheme for 2-D 3-T radiation diffusion equations on general polygonal *** vertex unknowns are treated as primary ones for which the finite volume equations are *** edgemidpoint and cell-centered unknowns are used as auxiliary ones and interpolated by the primary unknowns,which makes the final scheme a pure vertex-centered *** comparison,most existing positivity-preserving finite volume schemes are cell-centered and based on the convex decomposition of the ***,the conormal decomposition is not convex in general,leading to a fixed stencil of the flux approximation and avoiding a certain search algo-rithm on complex ***,the new scheme effectively alleviates the nu-merical heat-barrier issue suffered by most existing cell-centered or hybrid schemes in solving strongly nonlinear radiation diffusion *** experiments demonstrate the second-order accuracy and the positivity of the solution on various distorted *** the problem without analytic solution,the contours of the nu-merical solutions obtained by our scheme on distorted meshes accord with those on smooth quadrilateral meshes.

关键词： 2-D 3-T radiation diffusion equations vertex-centered scheme positivity-preserving finite volume

Variations in the oxytocin receptor gene and prosocial behavior:moderating effects of situational factors

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Integrative Zoology 2018年第6期13卷 687-697页

作者： Nan wu Yanjie su Teachers College of Beijing Union University Peking UniversityBeijingChina School of Psychological and Cognitive Sciences and Beijing Key Laboratory of Behavior and Mental Health Peking UniversityBeijingChina

Humans are the most prosocial primate species and they often exhibit high levels of prosocial behavior toward genetically unrelated *** evolutionary theories are not sufficient to explain the individual differences and mechanisms related to *** this study,we focused on the gene–situation interaction in prosocial behaviors,and the patterns of genotype variance related to cooperation and comforting in different *** explored the interaction between the oxytocin receptor(OXTR)gene and situations,and the genotype variance under low and high prosociality situations between outgroup and ingroup recipients in a sample of 422 Chinese *** was tested by measuring the prosocial tendencies,and prosocial behaviors were tested in cooperation and comforting *** single nucleotide polymorphisms(SNPs)were genotyped using polymerase chain reaction–restriction fragment length polymorphism *** results suggested that the relationship between OXTR SNPs(specifically rs13316193,rs1042778 and rs237887)and prosocial behavior varied across different situations,and that the associations were moderated by the recipient’s identity and the prosocial *** findings indicate the action of a moderating mechanism between the OXTR gene and prosocial behaviors according to situational factors.

关键词： group membership oxytocin receptor gene prosocial behavior prosocial cost

脱细胞皮肤基质/聚氨酯混纺纤维支架促进大鼠皮肤缺损的修复

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中国组织工程研究 2025年第4期29卷 745-751页

作者：吴辰江佳慧苏豆刘晨慈超皖南医学院第一附属医院皮肤性病科安徽省芜湖市241001 皖南医学院第一附属医院脊柱外科安徽省芜湖市241001

背景:研究证实,将脱细胞基质与聚合物进行混合纺丝不仅可改善纤维的结构性质,还可保存脱细胞基质的生物学活性,但是目前将聚氨酯与脱细胞皮肤基质进行静电纺丝制备皮肤组织工程支架还没有相关报道。目的:观察脱细胞皮肤基质/聚氨酯混纺... 详细信息

背景:研究证实,将脱细胞基质与聚合物进行混合纺丝不仅可改善纤维的结构性质,还可保存脱细胞基质的生物学活性,但是目前将聚氨酯与脱细胞皮肤基质进行静电纺丝制备皮肤组织工程支架还没有相关报道。目的:观察脱细胞皮肤基质/聚氨酯混纺纤维支架对大鼠皮肤缺损的修复作用。方法:利用静电纺丝技术分别制备聚氨酯静电纺丝纤维支架和脱细胞皮肤基质/聚氨酯混纺纤维支架。扫描电镜下观察纤维结构;将大鼠脂肪间充质干细胞分别接种于两组支架上,扫描电镜下观察支架上的细胞形态。取10只SD大鼠,在每只大鼠背部制作3个1 cm×1 cm的全层皮肤缺损,其中2处缺损分别植入聚氨酯静电纺丝纤维支架(对照组)、脱细胞皮肤基质/聚氨酯混纺纤维支架(实验组),剩余缺损处不植入任何材料(空白对照组)。术后第1,2,3周,观察皮肤创面愈合情况;植入后第3周,进行创面苏木精-伊红染色,计算创面瘢痕面积。结果与结论:①扫描电镜下可见两种静电纺丝纤维均为网状结构,并且大鼠脂肪间充质干细胞在两种支架上沿纤维附着,黏附良好。②随着术后时间的延长,各组皮肤创面逐渐愈合,至术后第3周,实验组、对照组皮肤创面基本愈合,空白对照组创面可见小溃疡形成。皮肤创面苏木精-伊红染色显示,对照组、实验组创面表皮覆盖基本完整,真皮层内可见成纤维细胞长入和炎症细胞浸润,并且实验组创面胶原纤维较为丰富、排列规则有序,与表皮面基本平行;空白对照组创面表皮仍有缺损。实验组创面瘢痕面积小于其他两组(P<0.05,P<0.01)。③结果表明,脱细胞皮肤基质/聚氨酯混纺纤维支架可以有效修复大鼠全层皮肤缺损、改善创面瘢痕形成。

关键词：脱细胞皮肤基质聚氨酯静电纺丝皮肤缺损瘢痕

subsonic impulsively starting flow at a high angle of attack with shock wave and vortex interaction

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Chinese Journal of Aeronautics 2018年第9期31卷 1822-1828页

作者： Chenyuan BAI juan LI Ziniu wu School of Aerospace Engineering Tsinghua University Institute of Aeroengine Tsinghua University

Impulsively starting flow, by a sudden attainment of a large angle of attack, has been well studied for incompressible and supersonic flows, but less studied for subsonic flow. Recently,a preliminary numerical study for subsonic starting flow at a high angle of attack displays an advance of stall around a Mach number of 0.5, when compared to other Mach numbers. To see what happens in this special case, we conduct here in this paper a further study for this case, to display and analyze the full flow structures. We find that for a Mach number around 0.5, a local supersonic flow region repeatedly splits and merges, and a pair of left-going and right-going unsteady shock waves are embedded inside the leading edge vortex once it is sufficiently grown up and detached from the leading edge. The flow evolution during the formation of shock waves is displayed in detail. The reason for the formation of these shock waves is explained here using the Laval nozzle flow theory. The existence of this shock pair inside the vortex, for a Mach number only close to 0.5, may help the growing of the trailing edge vortex responsible for the advance of stall observed previously.

关键词： Advance of stall Compressible vortex High angle of attack subsonic starting flow Unsteady shock waves

Design and performance evaluation of a novel ranging signal based on an LEO satellite communication constellation

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Geo-Spatial Information Science 2023年第1期26卷 107-124页

作者： Jingfang su Jia su Qingwu Yi Cailun wu Weimin Hou School of Information Science and Engineering Hebei University of Science and TechnologyShijiazhuangChina The State Key Laboratory of Satellite Navigation System and Equipment Technology ShijiazhuangChina

Driven by improvements in satellite internet and Low Earth Orbit(LEO)navigation augmenta-tion,the integration of communication and navigation has become increasingly common,and further improving navigation capabilities based on communication constellations has become a significant *** the context of the existing Orthogonal Frequency Division Multiplexing(OFDM)communication systems,this paper proposes a new ranging signal design method based on an LEO satellite communication *** LEO Satellite Communication Constellation Block-type Pilot(LSCC-BPR)signal is superimposed on the com-munication signal in a block-type form and occupies some of the subcarriers of the OFDM signal for transmission,thus ensuring the continuity of the ranging pilot signal in the time and frequency *** estimation in the time and frequency domains is performed to obtain the relevant distance value,and the ranging accuracy and communication resource utilization rate are *** characterize the ranging performance,the Root Mean Square Error(RMSE)is selected as an evaluation *** show that when the number of pilots is 2048 and the Signal-to-Noise Ratio(SNR)is 0 dB,the ranging accuracy can reach 0.8 m,and the pilot occupies only 50%of the communication subcarriers,thus improving the utilization of communication resources and meeting the public demand for communication and location services.

关键词： Integration of communication and navigation LEO communication constellation ranging LEO navigation augmentation satellite internet

Generalized Kutta–Joukowski theorem for multi-vortex and multi-airfoil flow with vortex production——A general model

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Chinese Journal of Aeronautics 2014年第1期27卷 1037-1050页

作者： Bai Chenyuan Li juan wu Ziniu School of Aerospace Tsinghua University

By using a special momentum approach and with the help of interchange between singularity velocity and induced flow velocity, we derive in a physical way explicit force formulas for twodimensional inviscid flow involving multiple bound and free vortices, multiple airfoils, and vortex production. These force formulas hold individually for each airfoil thus allowing for force decomposition, and the contributions to forces from singularities（such as bound and image vortices,sources, and doublets） and bodies out of an airfoil are related to their induced velocities at the locations of singularities inside this airfoil. The force contribution due to vortex production is related to the vortex production rate and the distance between each pair of vortices in production, thus frameindependent. The formulas are validated against a number of standard problems. These force formulas, which generalize the classic Kutta–Joukowski theorem（for a single bound vortex） and the recent generalized Lagally theorem（for problems without a bound vortex and vortex production） to more general cases, can be used to identify or understand the roles of outside vortices and bodies on the forces of the actual body, optimize arrangement of outside vortices and bodies for force enhancement or reduction, and derive analytical force formulas once the flow field is given or known.

关键词： Drag force Lift force Multibody Multiple vortices Vortex production

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Energy decomposition analysis for intramolecular non-covalent interaction in solvated environment

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Science China Chemistry 2016年第8期59卷 1025-1032页

作者： Peifeng su Hongjiang Chen Wei wu Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China Collaborative Innovation Center of Chemistry for Energy materials State Key Laboratory of Physical Chemistry of Solid surfacesCollege of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China

In this work, the intra-EDA method, which is a recently developed energy decomposition analysis scheme for intramolecular non-covalent interaction is extended from gas phase to solvated environment. It is the first analysis scheme that performs analysis for intramolecular interaction in solution. By fragmentation scheme, a molecule is divided into intramolecular interacting fragments and environmental fragments via single bond homolysis breaking. The solvent effect is taken into account by implicit solvation model. Intramolecular interaction free energy is estimated as the separated treatment of inter-fragment interactions in dielectric environment. The analysis results highlight the importance of solvent effects to intramolecular non-covalent interaction.

关键词： intramolecular interaction solvent effects energy decomposition analysis

An improved bound on accelerated light dark matter

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Science China(Physics,Mechanics & Astronomy) 2024年第2期67卷 105-118页

作者： Liangliang su Lei wu Bin Zhu Department of Physics and Institute of Theoretical Physics Nanjing Normal UniversityNanjing 210023China School of Physics Yantai UniversityYantai 264005China

Light(sub-GeV)dark matter has gained increasing interest in terms of direct *** dark matter is a promising candidate that can generate detectable nuclear recoil energy within the sub-GeV *** of the large kinetic energy,its interactions with the nucleus are predominantly governed by inelastic scattering,including quasi-elastic and deep inelastic *** this work,we calculated the inelastic effects in dark matter-Earth scattering mediated by a vector *** analysis revealed that the impact of inelastic scattering relies on the mediator mass and the kinetic energy spectrum of dark *** results exhibited considerable disparity:the upper bounds of the exclusion limit for the spin-independent cross-section between accelerated dark matter and nuclei via a heavy mediator differ by several tens of times when inelastic scattering is considered.

关键词： accelerated dark matter inelastic scattering direct detection experiment

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