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Influence of edge effects on the molding filling in liquid composites molding

Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of technology 2005年第4期27卷 16-18+22页

作者： Tian, Zheng-Gang Wang, Ji-Hui Zhang, Yuan Gao, Guo-Qiang Zhu, Ying-Dan State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan Univ. of Technology Wuhan 430070 China Beijing FRP Research and Design Inst. Beijing 102101 China

In liquid composites molding (LCM) processes,a gap between the perform and the mold edge can create a preferential flow path for the resin, which is the so-called edge effect. The resin flow behaviors in different gaps were studied by the unidirectional flow method together with the equivalent permeability tensor of flow path computed by two geometric models. In addition, the filling process was simulated to predict the influences of edge effects on the flow pattern. It is found out that even small gaps would disturb the edge flow. The simulation shows good agreement with the experiments.

关键词： Edge effect Equivalent permeability LCM

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synthesis and Self-Assembly of Core-shell Co@SiO2 Magnetic nanocomposites

Synthesis and Self-Assembly of Core-shell Co@SiO2 Magnetic n...

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International Conference on Nanoscience & technology,China 2013(ChinaNANO 2013)(中国国际纳米科学和技术大会)

作者： Si-Ming Wu Nan Jiang Wei Geng Ru-Jin Cheng Jie Hu Jie Ying Sheng-Chun He Yong Wang Xiao-Yu Yang State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of TechnologyLuoshi Road 122Wuhan 430070P.R.China

In recent years, self-assembly nanoparticles into well-ordered structures possess quite important position in spectroscopy, magnetism, catalysis and *** all of the nanoparticles, magnetic nanoparticles promises an unparalleled opportunity for self-assembly as they can be controlled to form directional arrangements according to the external magnetic fields.

关键词： self-assembly nanoparticles core-shell magnetic

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DeePMD-kit v3: A Multiple-Backend Framework for Machine Learning Potentials

arXiv

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arXiv 2025年

作者： Zeng, Jinzhe Zhang, Duo Peng, Anyang Zhang, Xiangyu He, Sensen Wang, Yan Liu, Xinzijian Bi, Hangrui Li, Yifan Cai, Chun Zhang, Chengqian Du, Yiming Zhu, Jia-Xin Mo, Pinghui Huang, Zhengtao Zeng, Qiyu Shi, Shaochen Qin, Xuejian Yu, Zhaoxi Luo, Chenxing Ding, Ye Liu, Yun-Pei Shi, Ruosong Wang, Zhenyu Bore, Sigbjørn Løland Chang, Junhan Deng, Zhe Ding, Zhaohan Han, Siyuan Jiang, Wanrun Ke, Guolin Liu, Zhaoqing Lu, Denghui Muraoka, Koki Oliaei, Hananeh Singh, Anurag Kumar Que, Haohui Xu, Weihong Xu, Zhangmancang Zhuang, Yong-Bin Dai, Jiayu Giese, Timothy J. Jia, Weile Xu, Ben York, Darrin M. Zhang, Linfeng Wang, Han School of Artificial Intelligence and Data Science Unversity of Science and Technology of China Hefei China AI for Science Institute Beijing100080 China DP Technology Beijing100080 China Academy for Advanced Interdisciplinary Studies Peking University Beijing100871 China State Key Lab of Processors Institute of Computing Technology Chinese Academy of Sciences Beijing100871 China University of Chinese Academy of Sciences Beijing China Baidu Inc. Beijing China Department of Computer Science University of Toronto TorontoON Canada Department of Chemistry Princeton University PrincetonNJ08540 United States University of Chinese Academy of Sciences Beijing100871 China State Key Laboratory of Physical Chemistry of Solid Surfaces iChEM College of Chemistry and Chemical Engineering Xiamen University Xiamen361005 China College of Integrated Circuits Hunan University Changsha410082 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center for Smart Materials and Device Integration School of Material Science and Engineering Wuhan University of Technology Wuhan430070 China College of Science National University of Defense Technology Changsha410073 China Hunan Key Laboratory of Extreme Matter and Applications National University of Defense Technology Changsha410073 China ByteDance Research Beijing100098 China Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo315201 China College of Materials Science and Opto-Electronic Technology University of Chinese Academy of Sciences Beijing100049 China Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education College of Chemistry Beijing Normal University Beijing100875 China Department of Geosciences Princeton University PrincetonNJ08544 United States Department of Applied Physics and Applied Mathematics Columbia University New YorkNY10027 United States IKKEM Fujian Xiamen361005 China Graduate

In recent years, machine learning potentials (MLPs) have become indispensable tools in physics, chemistry, and materials science, driving the development of software packages for molecular dynamics (MD) simulations and related applications. These packages, typically built on specific machine learning frameworks such as TensorFlow, PyTorch, or JAX, face integration challenges when advanced applications demand communication across different frameworks. The previous TensorFlow-based implementation of DeePMD-kit exemplified these limitations. In this work, we introduce DeePMD-kit version 3, a significant update featuring a multi-backend framework that supports TensorFlow, PyTorch, JAX, and PaddlePaddle backends, and demonstrate the versatility of this architecture through the integration of other MLPs packages and of Differentiable Molecular Force Field. This architecture allows seamless backend switching with minimal modifications, enabling users and developers to integrate DeePMD-kit with other packages using different machine learning frameworks. This innovation facilitates the development of more complex and interoperable workflows, paving the way for broader applications of MLPs in scientific research. Copyright © 2025, The Authors. All rights reserved.

关键词： Molecular dynamics

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Novel Role of ER Stress and Mitochondria Stress in Serum-deprivation Induced Apoptosis of Rat Mesenchymal Stem Cells

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Current Medical Science 2018年第2期38卷 229-235页

作者： Tong QIU Yan-yan HE Xiao ZHANG Xiao-lin MA State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Biomedical Material and Engineering Center Wuhan University of Technology Wuhan 430070 China School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China Biomedical Materials and Engineering Research Center of Hubei Province Wuhan University of Technology Wuhan 430070 China International School of Materials Science and Engineering Wuhan University of Techonology Wuhan 430070 China Hubei Key Laboratory of Purification and Application of Plant Anti-cancer Active Ingredients Hubei University of Education Wuhan 430205 China

The poor survival of mesenchymal stem cells （MSCs） compromises the efficacy of stem cell therapy. Growth factor deprivation is one of the important factors that have challenged the survival of donor MSCs in cell therapy. In this study, the aim was to evaluate the effect of serum deprivation on the cell death of MSCs and to investigate the underlying mechanisms. Apoptosis of MSCs was evaluated with Hoechst 33342/PI staining. Signaling pathways involved in serumdeprivation induced apoptosis were analyzed using Western blotting. The results revealed that serum deprivation induced apoptosis in MSCs within 72 h of treatment. Serum deprivation was shown to lead to protein expression alterations in Bax, Bcl-2, casepase-3, casepase-8, GRP78, and CHOP during experiments. The data suggested that the mitochondria death pathway, the extrinsic apoptotic pathway and the endoplastic reticulum（ER） stress pathway were all involved in MSCs apoptosis. The increase in expression of CHOP and the simultaneous decrease in Bcl- 2 expression suggest a synergistic effect in apoptosis induction in both the mitochondrion and the ER.

关键词： mesenchymal stem cells serum deprivation mitochondria pathway endoplasmicreticulum stress synergistic effects

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Antimony-Doped SnO2 Nanoparticles with Controlled Doping Level Via Nonaqueous Sol-Gel Procedure

Antimony-Doped SnO2 Nanoparticles with Controlled Doping Lev...

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中国材料大会2012

作者： Junyan Wu Fei Chen Qiang Shen Lianmeng Zhang State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Key Laboratory of Advanced Technology for Specially Functional Materials Ministry of Education Wuhan University of Technology

ISBN: (纸本)9783037856079;3037856076

Antimony-doped tin oxide (ATO) nanoparticles with controlled doping level were prepared by a nonaqueous solution route, using alcohol as the solvent, citric acid as an agent, tin (IV) tetrachloride as tin source and antimony (III) chlorideas as antimony sources. As-synthesized samples were characterized by Thermogravimetric analysis (TGA), powder X-ray diffraction (XRD), transmission electron micrographs (TEM), N2 adsorption-desorption isotherms, and X-ray photoelectron spectroscopy (XPS). The results showed that the content of citric acid was the most important processing parameter which was largely governing the reaction course and the complete incorporation of Sb. When the citric acid to metal mol ratio was 2, the particles were the highly crystallized ATO nanoparticles of about 20nm and the Sb atoms were indeed incorporated into the SnO2 crystal structure (cassiterite SnO2 ).

关键词： Antimony-doped tin oxide nanoparticle, Controlled doping level, Nonaqueous sol-gel.

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Fabrication and Mechanical Properties of SiC/Cu Composites with Zn Addition by Hot Pressing Sintering

Fabrication and Mechanical Properties of SiC/Cu Composites w...

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中国材料大会2012

作者： Huang Liu Guoqiang Luo Pingan Chen Qiang Shen Lianmeng Zhang State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Key Laboratory of Advanced Technology for Specially Functional Materials Ministry of Education Wuhan University of Technology

ISBN: (纸本)9783037856079;3037856076

SiC/Cu composites exhibit low density, low coefficient of thermal expansion and excellent mechanical properties. In this study, Zn of 2 wt. % was added as the sintering activator, and the high volume faction (60%) SiC/Cu composites was fabricated by hot pressing sintering technology. The phase composition and morphology of as-prepare samples were characterized by X-ray diffraction (XRD) system and scanning electron microscopy (SEM) equipped with an energy-dispersive spectroscopy (EDS) system. The as-prepared SiC/Cu composites were dense and uniform as well as void free. The results show that SiC/Cu composites can reach excellent mechanical properties of SiC/Cu composites. With the increase of sintering temperature, Vickers hardness and the bending strength of the samples increased obviously and the as-prepared SiC/Cu composites achieved a maximum Vickers hardness and bending strength respectively of 195MPa and 140MPa.

关键词： SiC/Cu Composite, Hot pressing sintering, Mechanical properties, Interface.

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Flexible high-performance microcapacitors enabled by all-printed two-dimensional nanosheets

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Science Bulletin 2022年第24期67卷 2541-2549,M0004页

作者： Pengxiang Zhang Yushui Fu Xin Zhang Xihua Zhang Bao-Wen Li Ce-Wen Nan Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) Shandong UniversityJinan 250061China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and DevicesWuhan University of TechnologyWuhan 430070China State Key Laboratory of Silicate Materials for Architectures School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Chemically exfoliated nanosheets have exhibited great potential for applications in various electronic ***-based processing strategies such as inkjet printing provide a low-cost,environmentally friendly,and scalab.e route for the fabrication of flexible devices based on functional inks of twodimensional *** this study,chemically exfoliated high-k perovskite nanosheets(i.e.,Ca_(2)Nb_(3)O_(10)and Ca_(2)NaNb_(4)O_(13))are well dispersed in appropriate solvents to prepare printable inks,and then,a series of microcapacitors with Ag and graphene electrodes are *** resulting microcapacitors,Ag/Ca_(2)Nb_(3)O_(10)/Ag,graphene/Ca_(2)Nb_(3)O_(10)/graphene,and graphene/Ca_(2)NaNb_(4)O_(13)/graphene,demonstrate high capacitance densities of 20,80,and 150 nF/cm^(2) and high dielectric constants of 26,*** 200,*** dielectric enhancement in the microcapacitors with graphene electrodes is possibly attributed to the dielectric/graphene *** addition,these microcapacitors also exhibit good insulating performance with a moderate electrical breakdown strength of approximately 1 MV/cm,excellent flexibility,and thermal stability up to 200℃.This work demonstrates the potential of high-k perovskite nanosheets for additive manufacturing of flexible high-performance dielectric capacitors.

关键词： High-k perovskite nanosheets Inkjet printing Microcapacitors Dielectric enhancement Interface effect

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synthesis of Single-Crystalline Silicon Nitride (α-Si 3 N 4 ) Nanowires with Controlled Diameters by Nitriding Cryomilled Nanocrystalline Silicon Powder

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MRS Online Proceedings Library 2011年第1期1279卷 1-9页

作者： Fei Chen Zhihao Wang Qiang Shen Zhixiong Huang Lianmeng Zhang Key Laboratory of Advanced Technology for Specially Functional Materials Ministry of Education Wuhan University of Technology Wuhan China State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan P. R. China

In the present work, silicon nitride nanowires (SNNWs) have been synthesized via nitriding cryomilled nanocrystalline silicon powder. The silicon powder exhibits a fine polycrystalline structure after the cryomilling process, with an average grain size of 25 to 125 nm at various cryomilling times. The SNNWs that form after the nitridation of the cryomilled silicon powder exhibit single crystal structure and are 20 to 100 nm in diameter and ∼10 µm in length. The diameter of the nanowires is in agreement with the grain size of the cryomilled Si powder. Microstructural characterization reveals that the as-synthesized nanowires have a hexagonal structure and their primary growth direction is along the [0001] direction. The formation of the Si–N–Si bond during the cryomilling process, as investigated theoretically with density functional theory, promotes the subsequent synthesis of the α-Si3N4 nanowires. The mechanism for nanowire formation appears to be a vapor-solid (VS) reaction.

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Design and Production of Filament-Wound Composite Pressure Vessels

Design and Production of Filament-Wound Composite Pressure V...

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The 11th China-Japan joint conference on Composite materials(第十一届中日复合材料学术会议)

作者： Lei Zu Jihui Wang Shuxin Li State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology122 Luoshi RoadWuhan 430070China

One of the most important issues for the design of filament-wound pressure vessels reflects on the determination of the most efficient meridian profiles and related iber architectures.

关键词： Composite pressure vessels Filament winding Fiber architecture Geodesic Non-geodesic

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The research on RSS filter for indoor positioning system based on wireless LANs

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Advances in Information Sciences and Service Sciences 2011年第4期3卷 1-9页

作者： Ren, Gao Yongxiang, Zhao Long, Tang School of Electronic Information of Wuhan University Hubei University of Economics State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan University

Recently, indoor positioning technology based on received signal strength in wireless networks are becoming more and more attractive. In this paper, we firstly introduced the experimental testbed in a typical office building. Then, we proposed the mechanism to improve the positioning accuracy by using five different filtering methods because of harsh multi-path environment and all kinds of disturbance in indoor areas. Thirdly, the experimental parameters of five filtering methods, called Limit Filter, Threshold Filter, Max Filter, MA Filter and Kalman Filter, were optimized and analyzed. Finally, we summarized the five filtering methods, and compared the performance of Limit Filter, Threshold Filter and Max Filter in detail. Experimental results demonstrated that the proposed Limit Filter andThreshold Filter can increase the accuracy in 3 meters of 91% to 98%.

关键词： Kalman filters

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