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Phase-Field Simulation of δ Hydride Precipitation with Interfacial Anisotropy

Computers, Materials & Continua 2023年第11期77卷 1425-1443页

作者： Hailong Nie Xincheng Shi Wenkui Yang kaile wang Yuhong Zhao School of Materials Science and Engineering Collaborative Innovation Center of Ministry of Education and Shanxi Province for High-Performance Al/Mg Alloy MaterialsNorth University of ChinaTaiyuan030051China Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing100083China Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang110004China

Previous studies ofδhydride in zirconium alloys have mainly assumed an isotropic *** practice,the difference in crystal structure at the interface between the matrix phase and the precipitate phase results in an anisotropic *** the purpose of probing the real evolution ofδhydrides,this paper couples an anisotropy function in the interfacial energy and interfacial *** influence of anisotropic interfacial energy and interfacial mobility on the morphology ofδhydride precipitation was investigated using the phase-field *** results show that the isotropy hydride precipitates a slate-like morphology,and the anisotropicδhydride precipitates at the semi-coherent and non-coherent interfaces exhibited parallelogram-like and needle-like,which is consistent with the actual experimental *** with the coherent interface,the semi-coherent or non-coherent interface adjusts the lattice mismatch,resulting in lower gradient energy that is more consistent with the true interfacial ***,an important chain of relationships is proposed,in the range of I_(x)1.5I_(x)),with the increase of the anisotropic mobility I_(y) in the y-axis,the gradient energy increases(decreases),the tendency of the non-coherent(semi-coherent)relationship at the interface,and the precipitation rate of hydride decreases(increases).Furthermore,the inhomogeneous stress distribution around the hydride leads to a localized enrichment of the hydrogen concentration,producing a hydride *** study of interfacial anisotropy is informative for future studies ofδhydride precipitation orientation and properties.

关键词： Zirconium δhydride phase-field method interfacial anisotropy interfacial mobility

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Coalescence of Al_(0.3)CoCrFeNi polycrystalline high-entropy alloy in hot-pressed sintering: a molecular dynamics and phase- field study

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npj Computational Materials 2023年第1期9卷 424-436页

作者： Qingwei Guo Hua Hou kaile wang Muxi Li Peter K.Liaw Yuhong Zhao School of Materials Science and Engineering Collaborative Innovation Center of Ministry of Education and Shanxi Province for High-performance Al/Mg Alloy MaterialsNorth University of ChinaTaiyuan 030051P R China School of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024P R China Department of Materials Science and Engineering The University of TennesseeKnoxvilleTNUSA Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083P R China Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang 110004P R China

Existing hot sintering models based on molecular dynamics focus on single-crystal *** work proposes a new multiparticle model based on molecular dynamics to investigate coalescence kinetics during the hot-pressed sintering of a polycrystalline Al_(0.3)CoCrFeNi high-entropy *** accuracy and effectiveness of the multiparticle model are verified by a phase-field *** this model,it is found that when the particle contact zones undergo pressure-induced evolution into exponential power creep zones,the occurrences of phenomena,such as necking,pore formation/filling,dislocation accumulation/decomposition,and particle rotation/rearrangement are *** on tensile test results,Young’s modulus of the as-sintered Al_(0.3)CoCrFeNi high-entropy alloy is calculated to be 214.11±1.03 GPa,which deviates only 0.82%from the experimental value,thus further validating the feasibility and accuracy of the multiparticle model.

关键词： alloy creep entropy

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A sensitive one-pot ROA assay for rapid miRNA detection

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aBIOTECH 2024年第3期5卷 298-308页

作者： Zhihao Hou Wenpeng Deng Alun Li Ya Zhang Jianye Chang Xinyue Guan Yuxiao Chang kaile wang Xinjie wang Jue Ruan Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China Hubei Key Laboratory of Agricultural Bioinformatics College of InformaticsHuazhong Agricultural UniversityWuhan 430070China Department of Systems Biology UT MD Anderson Cancer CenterHoustonTX 77030USA

MicroRNAs(miRNAs)and short RNA fragments(18–25 nt)are crucial biomarkers in biological research and disease ***,their accurate and rapid detection remains a challenge,largely due to their low abundance,short length,and sequence *** this study,we report on a highly sensitive,one-step RNA O-circle amplification(ROA)assay for rapid and accurate miRNA *** ROA assay commences with the hybridization of a circular probe with the test RNA,followed by a linear rolling circle amplification(RCA)using *** amplification process is facilitated by U-nick reactions,which lead to an exponential amplification for *** optimized conditions,assays can be completed within an hour,producing an amplification yield up to the microgram level,with a detection limit as low as 0.15 fmol(6 pM).Notably,the ROA assay requires only one step,and the results can be easily read visually,making it *** ROA assay has proven effective in detecting various miRNAs and phage ***,the ROA assay offers a user-friendly,rapid,and accurate solution for miRNA detection.

关键词： miRNA Rolling circle amplification(RCA) Sensitive detection Fluorescence detection

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Security in Edge Blockchains:Attacks and Countermeasures

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ZTE Communications 2022年第4期20卷 3-14页

作者： CAO Yinfeng CAO Jiannong wang Yuqin wang kaile LIU Xun Department of Computing The Hong Kong Polytechnic UniversityHong Kong SAR 852China

Edge blockchains,the blockchains running on edge computing infrastructures,have attracted a lot of attention in recent *** to data privacy,scalable computing resources,and distributed topology nature of edge computing,edge blockchains are considered promising solutions to facilitating future blockchain ***,edge blockchains face unique security issues caused by the de⁃ployment of vulnerable edge devices and networks,including supply chain attacks and insecure consensus offloading,which are mostly not well studied in previous *** paper is the first survey that discusses the attacks and countermeasures of edge *** first summarize the three-layer architecture of edge blockchains:blockchain management,blockchain consensus,and blockchain lightweight cli⁃*** then describe seven specific attacks on edge blockchain components and discuss the *** last,we provide future re⁃search directions on securing edge *** survey will act as a guideline for researchers and developers to design and implement se⁃cure edge blockchains.

关键词： blockchain edge computing security survey

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RNA-seq analysis of protective effect of epicatechin gallate on H_(2)O_(2)-induced oxidative injury in PC12 cells

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Journal of Polyphenols 2022年第1期4卷 1-16页

作者： Nan Cheng Xinxin Lin Jiayue Xu Kai wang kaile wang Zhengping Liu Parhat Kamel Fang wang School of Life Science and Biopharmaceutics Shenyang Pharmaceutical UniversityShenyang 110016China Faculty of Functional Food and Wine Shenyang Pharmaceutical UniversityShenyang 110016China

Epicatechin gallate(ECG)is one of the polyphenolic compounds and has attracted much attention due to its various *** this study,the neuroprotective eff ect of ECG against H_(2)O_(2)-induced oxidative injury in PC12 cells as well as the possible mechanisms were *** viability was determined by MTT *** differentially expressed genes(DEGs),GO enrichment,and KEGG enrichment were analyzed to explore the mechanism of ECG against H_(2)O_(2)-induced oxidative injury by using the RNA-seq ***,the change in the cell cycle was analyzed by fl ow cytometry.H_(2)O_(2)(400-1200μmol/L)inhibited the cell viability in a concentration-dependent ***(6-150μmol/L)eff ectively attenuated the H_(2)O_(2)-induced decrease in cell ***-seq analysis showed that ECG regulated 1058 coexpressed *** enrichment analysis showed that the cellular component was the dominant group after ECG *** analysis showed that the cell cycle,fanconi anemia pathway,and homologous recombination were the important pathways for ECG in improving H_(2)O_(2)-induced oxidative injury and 28 coexpressed DEGs in the cell cycle pathway were ***,cell cycle analysis also proved that ECG improved H_(2)O_(2)-induced cell cycle arrest in the G2/M *** present study demonstrated that ECG attenuated H_(2)O_(2)-induced neurologic oxidative damage by multiple modulatory mechanisms at the molecular transcription *** fi ndings provide new insights for further study of the molecular mechanism of the neuroprotection of ECG.

关键词： epicatechin gallate H_(2)O_(2) oxidative injury RNA-seq cell cycle

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Wavelength-flexible all-polarization-maintaining self-sweeping fiber laser based on intracavity loss tuning

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Chinese Optics Letters 2021年第4期19卷 39-43页

作者： kaile wang Zengrun Wen Haowei Chen Baole Lu Jintao Bai State Key Laboratory of Photoelectric Technology and Functional Materials International Collaborative Center on Photoelectric Technology and Nano Functional MaterialsInstitute of Photonics&Photon-technologyNorthwest UniversityXi'an 710069China Shaanxi Engineering Technology Research Center for Solid State Lasers and Application Provincial Key Laboratory of Photo-electronic TechnologyNorthwest UniversityXi'an 710069China

We reported a wavelength-flexible all-polarization-maintaining self-sweeping fiber laser based on the intracavity loss tuning brought by the bent optical fiber. The bidirectional cavity structure achieved the self-sweeping effect due to the appearance of the dynamic grating in the active fiber with the spatial hole burning effect. Under this, a section of fiber was bent into a circle for adjusting the loss of the cavity. With a descending diameter of bent fiber circle, the sweeping range moves to the shorter wavelength and covers a wide range from 1055.6 to 1034.6 nm eventually. Both the initial wavelength of self-sweeping regime and the threshold of the fiber laser show exponential correlation with the diameter of the circular fiber. Our work provides a compact and low-cost way to achieve the broad wavelength-flexible self-sweeping operation.

关键词： fiber laser self-sweeping effect bidirectional cavity flexible wavelength all-polarization maintaining

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蒸压加气混凝土薄灰缝砌体新型专用粘结剂性能研究

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沈阳建筑大学学报（自然科学版） 2021年第3期37卷 462-469页

作者：徐春一王凯乐阎磊沈阳建筑大学土木工程学院辽宁沈阳110168 沈阳市建设工程质量监督站辽宁沈阳110002

目的配置适用于蒸压加气混凝土薄灰缝砌体的新型专用粘结剂。方法以砂浆的拉伸粘结强度、稠度及立方体抗压强度为指标,通过正交试验确定专用粘结剂的基准配合比;利用外加剂羟丙基甲基纤维素醚、可再分散乳胶粉以及引气剂对专用粘结剂基... 详细信息

目的配置适用于蒸压加气混凝土薄灰缝砌体的新型专用粘结剂。方法以砂浆的拉伸粘结强度、稠度及立方体抗压强度为指标,通过正交试验确定专用粘结剂的基准配合比;利用外加剂羟丙基甲基纤维素醚、可再分散乳胶粉以及引气剂对专用粘结剂基准配合比进行改性,最终确定新型专用粘结剂的最优配合比。结果蒸压加气混凝土薄灰缝砌体新型专用粘结剂的最优配合比为m(砂)∶m(水泥)∶m(粉煤灰)∶m(水)∶m(羟丙基甲基纤维素醚)∶m(可再分散乳胶粉)∶m(引气剂)=540∶290∶130∶260∶3∶5∶0.3,其拉伸粘结强度为0.58 MPa、稠度74 mm、立方体抗压强度14.8 MPa,均满足专用粘结剂最优配合比标准。结论配置的蒸压加气混凝土薄灰缝砌体新型专用粘结剂在实际工程中具备优良的应用性,并且对蒸压加气混凝土砌块墙体保温隔热性能的提高效果显著。

关键词：蒸压加气混凝土薄灰缝新型专用粘结剂配合比

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工业机器人离线仿真项目开发流程研究

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现代工业经济和信息化 2024年第7期14卷 259-261页

作者：王开乐杭州晓悟智能有限公司浙江杭州310051

针对现有离线仿真系统在资源利用、仿真精度和复杂任务处理效率方面的局限性,研究分析了工业机器人离线仿真技术的应用现状,提出了一种改进的离线仿真项目开发系统。通过集成开发环境与专业三维建模工具相结合,利用OpenGL技术实现动态... 详细信息

针对现有离线仿真系统在资源利用、仿真精度和复杂任务处理效率方面的局限性,研究分析了工业机器人离线仿真技术的应用现状,提出了一种改进的离线仿真项目开发系统。通过集成开发环境与专业三维建模工具相结合,利用OpenGL技术实现动态三维场景的高精渲染,并采用C++编程语言优化仿真算法。同时,应用CATIA和3ds Max软件支持模型制作与视觉效果优化,确保模型在OpenGL中的准确呈现。该系统强化了程序的交互性和可视化,为高复杂度生产任务的安全高效执行提供了可靠支持。

关键词：工业机器人离线仿真项目开发三维建模

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基于“气候因子-成分含量-抗氧化能力”评价不同产地葛根品质关系

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中国实验方剂学杂志 2024年第10期30卷 140-148页

作者：裴莉昕陈琳王锴乐纪宝玉河南中医药大学药学院郑州450046 河南省道地药材生态种植工程技术研究中心郑州450046 天津大学药物科学与技术学院天津300072 豫药全产业链研发河南省协同创新中心郑州450046

目的:对葛根产地、气候因子、葛根总黄酮、葛根多糖含量及药用抗氧化活性等进行相关性分析,评价气候因子与葛根品质形成间的关系。方法:分别检测葛根总黄酮和多糖对1,1-二苯基-2-三硝基苯肼(DPPH)、2,2-联氮-二(3-乙基-苯并噻唑-6-磺酸... 详细信息

目的:对葛根产地、气候因子、葛根总黄酮、葛根多糖含量及药用抗氧化活性等进行相关性分析,评价气候因子与葛根品质形成间的关系。方法:分别检测葛根总黄酮和多糖对1,1-二苯基-2-三硝基苯肼(DPPH)、2,2-联氮-二(3-乙基-苯并噻唑-6-磺酸)二铵盐(ABTS)自由基的清除率,并分析葛根产地和气候因子及各组分含量之间的相关性。结果:葛根总黄酮ABTS^(+)清除率与海拔呈显著负相关(P<0.05),与年日照时数呈正相关(P<0.05);海拔与总黄酮含量呈正相关,年日照时数与总黄酮含量呈负相关;总黄酮含量与总黄酮ABTS^(+)清除率呈负相关;即产地海拔越低,年日照时数越长,则总黄酮含量越低,而总黄酮ABTS^(+)清除率越高。葛根多糖ABTS^(+)清除率与无霜期呈负相关(P<0.05),与7月均温呈负相关(P<0.01);无霜期与葛根多糖含量呈正相关,7月均温与葛根多糖含量呈正相关(P<0.05);葛根多糖含量与葛根多糖ABTS^(+)清除率呈负相关;即产地无霜期越短,7月均温越低,则葛根多糖含量越低,而葛根多糖ABTS^(+)清除率越高。7月均温均与葛根样品中总黄酮、多糖含量均呈相关性(P<0.05),7月均温越低,葛根总黄酮含量越高,葛根多糖含量越低,葛根样品的抗氧化活性越强。结论:葛根对ABTS^(+)的清除能力比DPPH^(+)强,各产地气候因子、含量及抗氧化能力之间具有显著相关性,对核心气候因子诱导葛根药用活性成分形成的内在规律展开进一步研究将为揭示葛根道地性形成机制及后续拟境调控葛根品质提供科学依据。

关键词：产地气候因子葛根总黄酮葛根多糖抗氧化能力

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3-甲基噻吩与异丁烯烷基化反应的热力学分析

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石油化工 2009年第4期38卷 406-411页

作者：刘大威王凯乐杨伯伦刘煜西安交通大学化学工程系陕西西安710049

以3-甲基噻吩(3MT)和异丁烯(IB)作为汽油中噻吩类硫化物和烯烃的模型化合物,正庚烷模拟汽油组分,以3MT与IB的烷基化反应作为探针反应,利用化学计量系数法确立了该反应物系的独立反应数,应用基团贡献法估算各物质的基础物性数据,采用UNIQ... 详细信息

以3-甲基噻吩(3MT)和异丁烯(IB)作为汽油中噻吩类硫化物和烯烃的模型化合物,正庚烷模拟汽油组分,以3MT与IB的烷基化反应作为探针反应,利用化学计量系数法确立了该反应物系的独立反应数,应用基团贡献法估算各物质的基础物性数据,采用UNIQUAC方程计算不同温度下各独立反应的反应热和Gibbs自由能变;采用AspenPlus化工流程模拟软件,考察了温度、压力和原料组成对正庚烷-3MT-IB模型汽油中3MT转化率、烯烃聚合物含量及烷基化产物分布的影响。热力学分析结果表明,3MT在一定温度、压力和初始原料组成范围内均可达到较高的转化率。在3MT的初始质量分数为1.0%(以原料的总质量计)、2MPa、273～453K的条件下,3MT转化率均高于99%。高温、低压和高硫化物含量则能抑制IB聚合副反应的发生。

关键词： 3-甲基噻吩异丁烯烷基化汽油脱硫 Aspen Plus软件热力学

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