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International Journal of Minerals,Metallurgy and Materials 2015年第4期22卷 437-445页

作者： Yan-bo Wu Jun Bi Ting Lou Tie-ben Song Hong-quan Yu School of Environmental and chemical Engineering Dalian Jiaotong University

Polyacrylonitrile （PAN）, PAN/cellulose acetate （cA）, and PAN/cA-Ag based activated carbon nanofiber （AcNF） were prepared using electrostatic spinning and further heat treatment. Thermogravimetrylifferential scanning calorimetry （TG-DSc） analysis indicated that the addition of cA or Ag did not have a significant impact on the thermal decomposition of PAN materials but the yields of fibers could be improved. Scanning electron microscopy （SEM） analysis showed that the micromorphologies of produced fibers were greatly influenced by the viscosity and conductivity of precursor solutions. Fourier transform infrared spectroscopy （FT-IR） analysis proved that a cyclized or trapezoidal structure could form and the carbon scaffold composed of c=c bonds appeared in the PAN-based AcNFs. The characteristic dif- fraction peaks in X-ray diffraction （XRD） spectra were the evidence of a turbostratic structure and silver existed in the PAN/cA-Ag based AcNF. Brurmer-Emmett-Teller （BET） analysis showed that the doping of cA and Ag increased surface area and micropore volume of fi- bers; particularly, PAN/cA-Ag based AcNF exhibited the best porosity feature. Furthermore, SO2 adsorption experiments indicated that all the three fibers had good adsorption effects on lower concentrations of SO2 at room temperature; especially, the PAN/cA-Ag based AcNF showed the best adsorption performance, and it may be one of the most promising adsorbents used in the fields of chemical industry and en- vironment protection.

关键词： activated carbon nanofibers polyacrylonitrile electrospinning adsorption sulfur dioxide

Three-Dimensional Growth of coherent Ferrite in Austenite: A Molecular Dynamics Study

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Acta Metallurgica Sinica(English Letters) 2019年第6期32卷 669-676页

作者： Zhi-Peng Sun Fu-Zhi Dai ben Xu Wen-Zheng Zhang Key Laboratory of Advanced Materials(MOE) School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Science and Technology of Advanced Functional composite Laboratory Aerospace Research Institute of Materials and Processing TechnologyBeijing 100076China

coherent second phase often exhibits anisotropic morphology with specifi c orientations with respect to both the second and the matrix *** a key feature of microstructure,the morphology of the coherent particles is essential for understanding the second-phase strengthening eff ect in various industrial *** letter reports anisotropic growth of coherent ferrite from austenite matrix in pure iron based on molecular dynamics *** found that the ferrite grain tends to grow into an elongated plate-like shape,independent of its initial confi *** fi nal shape of the ferrite is closely related to the misfi t between the two phases,with the longest direction and the broad facet of the plate being,respectively,consistent with the best matching direction and the best matching plane calculated via the Burgers vector content(BVc)*** strain energy calculation in the framework of Eshelby’s inclusion theory verifi es that the simulated orientation of the coherent ferrite is energetically *** is anticipated that the BVc method will be applicable in analysis of anisotropic growth and morphology of coherent second phase in other phase transformation systems.

关键词： coherent ferrite Anisotropic growth Molecular dynamics simulation Burgers vector content Eshelby’s inclusion theory

Modulation of Na_v1.8 by Lysophosphatidic Acid in the Induction of Bone cancer Pain

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Neuroscience Bulletin 2016年第5期32卷 445-454页

作者： Hai-Li Pan ben-Long Liu Wei Lin Yu-Qiu Zhang center for Neuropsychiatric Diseases Institute of Life Science Nanchang University Institute of Neurobiology Institutes of Brain Science and State Key Laboratory of Medical NeurobiologyCollaborative Innovation Center for Brain Science Fudan University

Given that lysophosphatidic acid（LPA） and the tetrodotoxin-resistant sodium channel Na_v1.8 are both involved in bone cancer pain, the present study was designed to investigate whether crosstalk between the LPA receptor LPA_1（also known as EDG2） and Na_v1.8 in the dorsal root ganglion（DRG） contributes to the induction of bone cancer pain. We showed that the EDG2 antagonist Ki16198 blocked the mechanical allodynia induced by intrathecal LPA in na？ve rats and attenuated mechanical allodynia in a rat model of bone cancer. EDG2 and Na_v1.8expression in L_（4-6）DRGs was upregulated following intrathecal or hindpaw injection of LPA. EDG2 and Na_v1.8expression in ipsilateral L_（4-6）DRGs increased with the development of bone cancer. Furthermore, we showed that EDG2 co-localized with Na_v1.8 and LPA remarkably enhanced Na_v1.8 currents in DRG neurons, and this was blocked by either a protein kinase c（PKc） inhibitor or a PKce inhibitor. Overall, we demonstrated the modulation of Na_v1.8 by LPA in DRG neurons, and that this probably underlies the peripheral mechanism by which bone cancer pain is induced.

关键词： Lysophosphatidic acid Bone cancer pain Tetrodotoxin-resistant sodium channel Nav1.8 Dorsal root ganglion

Exogenous approach to improve topic segmentation

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International Journal of Intelligent computing and cybernetics 2016年第2期9卷 165-178页

作者： Marwa Naili Anja Habacha chaibi Henda Hajjami ben Ghezala RIADI Laboratory National School of Computer ScienceUniversity of ManoubaTunisia

Purpose-Topic segmentation is one of the active research fields in natural language ***,many topic segmenters have been ***,the current challenge of researchers is the improvement of these segmenters by using external ***,the purpose of this paper is to integrate study and evaluate a new external semantic resource in topic ***/methodology/approach-New topic segmenters(TSS-Onto and TSB-Onto)are proposed based on the two well-known segmenters c99 and *** proposed segmenters integrate semantic knowledge to the segmentation process by using a domain ontology as an external ***,an evaluation is made to study the effect of this resource on the quality of topic segmentation along with a comparative study with related ***-Based on this study,the authors showed that adding semantic knowledge,which is extracted from a domain ontology,improves the quality of topic ***,TSS-Ont outperforms TSB-Ont in terms of quality of topic *** limitations/implications-The main limitation of this study is the used test corpus for the evaluation which is not a ***,we used a collection of scientific papers from well-known digital libraries(ArXiv and AcM).Practical implications-The proposed topic segmenters can be useful in different NLP applications such as information retrieval and text ***/value-The primary original contribution of this paper is the improvement of topic segmentation based on semantic *** knowledge is extracted from an ontological external resource.

关键词： Semantics Domain ontology External resources Topic segmentation

Monodispersed ultrathin twisty PdBi alloys nanowires assemblies with tensile strain enhance c_(2+)alcohols electrooxidation

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Journal of Energy chemistry 2023年第4期79卷 279-290页

作者： Xianzhuo Lao Ze Li Likang Yang ben Zhang Wanneng Ye Aiping Fu Peizhi Guo Institute of Materials for Energy and Environment State Key Laboratory of Bio-fibers and Eco-textilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071ShandongChina college of Physics State Key Laboratory of Bio-Fibers and Eco-TextilesCenter for Marine Observation and CommunicationsQingdao UniversityQingdao 266071ShandongChina college of chemistry and chemical Engineering Qingdao UniversityQingdao 266071ShandongChina

Direct alcohol fuel cells(DAFcs)are powered by the alcohol electro-oxidation reaction(AOR),where an electrocatalyst with an optimal electronic structure can accelerate the sluggish ***,strain engineering in hetero-catalysis offers a promising route to boost their catalytic ***,we report on a class of monodispersed ultrathin twisty PdBi alloy nanowires(TNWs)assemblies with face-centered structures that drive *** thin nanowire structures expose a large number of reactive ***,Pd_(6)Bi_(1)TNWs show an excellent current density of 2066,3047,and 1231 mA mg_(Pd)^(-1)for oxidation of ethanol,ethylene glycol,and glycerol,***“volcano-like”behaviors observed on PdBi TNWs for AORs indicate that the maximum catalytic mass activity is a well balance between active intermediates and blocking species at the *** study offers an effective and universal method to build novel nanocatalysts in various applications by rationally designing highly efficient catalysts with specific strain.

关键词： PdBi Nanowires Strain engineering Ligand exchange Synergetic effect Fuel cells

lncRNA MAGI2-AS3调节miR-218-5p/KDM2A轴对宫颈癌细胞活性和上皮间质转化的影响

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中国优生与遗传杂志 2024年第8期32卷 1545-1551页

作者：贲崴李扬罗佳玲单铁虎哈尔滨医科大学附属第一医院妇产科黑龙江哈尔滨150001

目的探讨lncRNA MAGI2-AS3调节miR-218-5p/赖氨酸去甲基化酶2A(KDM2A)轴对宫颈癌(cc细胞活性)和上皮间质转化(EMT)的影响。方法将体外培养的caSki细胞分为Nc组、si-Nc组、si-MAGI2-AS3组、miR-Nc组、miR-218-5p mimic组、si-MAGI2-AS3+inhibitor Nc组、si-MAGI2-AS3+miR-218-5p inhibitor组。检测MAGI2-AS3、miR-218-5p、KDM2AmRNA在cc组织、不同细胞及各组caSki细胞中的表达水平;检测caSki细胞增殖、迁移、侵袭、凋亡、Bax、Bcl-2及EMT相关蛋白表达;双荧光素酶实验验证miR-218-5p与MAGI2-AS3、KDM2A的关系。结果cc组织中MAGI2-AS3、KDM2AmRNA表达高于癌旁组织,miR-218-5p低于癌旁组织(PcerEpic细胞、c-33A细胞、caSki细胞中MAGI2-AS3、KDM2A mRNA表达均依次升高,miR-218-5p依次降低(PcaSki细胞增殖率、迁移率、侵袭细胞数、Bcl-2、Vimentin表达均低于Nc组和si-Nc组,miR-218-5p表达、caSki细胞凋亡率、Bax、E-cadherin表达均高于Nc组和si-Nc组(Pc组KDM2AmRNA表达、caSki细胞增殖率、迁移率、侵袭细胞数、Bcl-2、Vimentin表达均低于miR-Nc组,miR-218-5p表达、caSki细胞凋亡率、Bax、E-cadherin表达均高于miR-Nc组(Pcc细胞中呈高表达,下调MAGI2-AS3可调节miR-218-5p/KDM2A轴抑制caSki细胞恶性生物学行为,诱导其凋亡。

关键词： MAGI2-AS3 miR-218-5p 赖氨酸去甲基化酶2A 宫颈癌上皮间质转化

Restriction of Intramolecular Motion(RIM):Investigating AIE Mechanism from Experimental and Theoretical Studies

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chemical Research in chinese Universities 2021年第1期37卷 1-15页

作者： ZHANG Jianyu ZHANG Haoke LAM Jacky W.Y. TANG ben Zhong Department of chemistry Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration and ReconstructionInstitute for Advanced Studyand Department of Chemical and Biological EngineeringThe Hong Kong University of Science&TechnologyClear Water BayKowloonHong KongP.R.China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou310027P.R.China center for Aggregation-Induced Emission SCUT-HKUST Joint Research InstituteState Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou510640P.R.China Guangzhou Development District AIE InstituteGuangzhou510530P.R.China

Mechanistic studies promote scientific development from phenomena to ***-induced emission(AIE),as an unusual photophysical phenomenon,builds the bridge between molecular science and aggregate *** the twenty-year development of AIE,restriction of intramolecular motion(RIM)has been verified as the working mechanism of AIE *** this review,these mechanistic works about RIM are summarized from experimental and theoretical ***,the experimental studies are introduced from three parts:external rigidification,structural modification and structural *** the theoretical part,calculations on the low-frequency motion of AIEgens have been performed to prove the RIM *** virtue of the theoretical calculations,some new mechanisms are proposed to supplement the RIM,such as restriction of access to conical intersection,suppression of Kasha transition,restriction of access to dark state,*** is foreseeable that the RIM mechanism will unify the photophysical theories for both molecules and aggregates,and inspire more progress in aggregate science.

关键词： Aggregation-induced emission(AIE) Restriction of intramolecular motion Photophysical mechanism Aggregate science

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TUBA1c基因在结肠癌中的临床意义

分子诊断与治疗杂志 2024年第1期16卷 127-131页

作者：黄奔刘书娜仇思洁徐婷南京医科大学第一附属医院检验学部江苏南京210009

目的研究TUBA1c基因在结肠癌中的表达情况,分析其表达与结肠癌患者临床特征和预后的关系,探索TUBA1c基因与结肠癌发生、发展的关系。方法在癌症基因图谱(TcGA)和基因表达数据库(GEO)中下载结肠癌和正常组织的RNA测序数据,利用R 4.3.0软... 详细信息

目的研究TUBA1c基因在结肠癌中的表达情况,分析其表达与结肠癌患者临床特征和预后的关系,探索TUBA1c基因与结肠癌发生、发展的关系。方法在癌症基因图谱(TcGA)和基因表达数据库(GEO)中下载结肠癌和正常组织的RNA测序数据,利用R 4.3.0软件提取TUBA1c mRNA的表达值,分析TUBA1c在正常组织和结肠癌中的表达,并探究其表达水平与患者临床病理参数的相关性。结合患者的生存资料,使用Kaplan-Meier生存分析法分析TUBA1c表达与患者总体生存率的关系。cOX回归分析用于探索TUBA1c在结肠癌中的预后作用。同时,使用GEPIA2数据库和UALcAN数据库验证分析TUBA1c在结肠癌中的表达及预后的预测作用。基因集富集分析(GSEA)用于探索TUBA1c基因与结肠癌发生、发展相关的分子作用通路。结果与正常组织相比,TUBA1c mRNA在结肠癌组织中表达显著上调,差异有统计学意义(Pc患者的总体生存率显著低于低表达组,差异有统计学意义(PcOX回归分析显示,TUBA1c可作为结肠癌患者的独立预后因素(HR=1.993,95%cI:1.077~3.010,Pc参与了细胞周期、DNA复制、错配修复以及P53信号通路。结论TUBA1c基因在结肠癌组织中高表达,并与患者的预后相关,可通过多种致癌通路参与结肠癌的发生发展,有可能成为结肠癌的新型分子标志物。

关键词： TUBA1c 结肠癌预后标志物

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基于代数粒的聚类方法

计算机工程与科学 2024年第1期46卷 150-158页

作者：肖振国陈林书孙少杰梅本霞柳媛慧赵磊湖南科技大学计算机科学与工程学院湖南湘潭411201 湖南科技大学外国语学院湖南湘潭411201 湖南警察学院信息技术(网监)系湖南长沙410138

聚类,是机器学习的主要任务之一,也是粒计算理论的核心任务,即信息粒化。目前,基于粒计算的聚类算法中,大多数只基于粒属性进行聚类,而没有考虑粒结构,尤其是在代数结构应用广泛的信息领域。从粒计算的角度,提出一种基于代数粒的聚类方... 详细信息

聚类,是机器学习的主要任务之一,也是粒计算理论的核心任务,即信息粒化。目前,基于粒计算的聚类算法中,大多数只基于粒属性进行聚类,而没有考虑粒结构,尤其是在代数结构应用广泛的信息领域。从粒计算的角度,提出一种基于代数粒的聚类方法。基于二元代数运算定义代数粒;提出一种基于代数粒的聚类方法,通过粒集的同余划分和粒结构的同态映射进行粒度聚类;将提出的聚类方法与容差邻域模型和商空间模型进行对比分析。结果表明,该新型方法具有更好的结构完备性和应用鲁棒性。基于代数粒的聚类方法从结构上丰富和扩展了粒度计算理论,为粒计算与机器学习的融合研究提供了理论依据。

关键词：粒计算聚类粒化粗糙集商空间模型

Preparation and Properties of Modified Nanofiber Membrane for Lithium Sulfur Battery

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Preparation and Properties of Modified Nanofiber Membrane fo...

作者： Eya ben Ticha 天津工业大学

学位级别：硕士

锂硫电池具有较高的理论比容量和能量密度,分别达到1675 mAh/g和2600 Wh/kg,具有原料来源广,无毒无害,成本低的优点,受到越来越多的学者的关注。作为电池的重要元素之一,电池隔膜主要起到将电池的正极和负极分开,并避免了电池的短路。目... 详细信息

锂硫电池具有较高的理论比容量和能量密度,分别达到1675 mAh/g和2600 Wh/kg,具有原料来源广,无毒无害,成本低的优点,受到越来越多的学者的关注。作为电池的重要元素之一,电池隔膜主要起到将电池的正极和负极分开,并避免了电池的短路。目前,商业锂电池隔膜仍主要基于聚烯烃膜。然而,这样的隔膜具有差的电解液润湿性和保液性,以及差的热尺寸稳定性,并且可能导致电池短路甚至爆炸。特别地,难以抑制锂硫电池多硫化物的“穿梭效应”。因此,近年来,开发出具有高孔隙率,优异的电解质润湿性和高温稳定性的新型电池隔膜已成为锂硫电池领域的研究重点。电纺PMIA纳米纤维膜由于其优异的耐高温性,高比表面积和机械强度,已成为目前最具研究潜力的新型锂硫电池隔膜。然而,由于低亲液性和保液性,自放电严重,严重阻碍了其进一步发展。因此,为了改善此类问题并更好地改善电化学性能,本主题主要在两个方面的研究:(1)以高性能的PMIA为基材,通过静电纺丝技术制备了SiO-Fco-doped PMIA复合凝胶化隔膜。F掺杂的PMIA膜与SiO-F共掺杂的PMIA膜相结合,使所设计的功能隔膜具有极高的电解质吸收能力,并保留了出色的热稳定性和良好的耐收缩性,并有效地通过物理限域和化学吸附限制多硫化物的穿梭效应。使运用所制备的隔膜所组装的Li-S电池在1274.8 mAhg-1时具有出色的初始放电容量,并具有出色的循环稳定性,在0.5 c倍率下,所组装电池经过600次循环后具有出色的容量保持率814.8 mAhg-1和库仑效率98.42%。(2)利用静电纺丝技术制备含MOFs氟共掺杂芳纶纳米纤维膜,采用SEM、XRD和FTIR等表征了其微观结构,并考察了MOFs含量对纤维膜力学性能、保液率、亲液性和热稳定性等的影响,初步对含不同MOFs比例的隔膜所组装的电池进行电化学性能测试。结果表明,所制备的铝基MOFs纯度较高,其掺杂的含氟芳纶纳米纤维膜具有较高的热稳定性和良好的亲液性与保液率。根据初步的交流阻抗测试表明,3 wt%MOFs掺杂的含氟芳纶纳米纤维膜具有更好的电化学性能。该锂硫电池的电荷转移电阻以及界面阻抗较小,且具有极小的Warburg阻抗。运用所制备的隔膜所组装的Li-S电池,其PMIA,F-doped PMIA和MOF(3%)-F doped PMIA的电池循环,所组装电池的初始比容量容量分别为1075.6 mAhg、1093.1 mAhg和1133.2 mAhg。所组装的电池在经过300次循环后的放电比容量为520.4 mAhg、613.9 mAhg和782.6 mAhg。

关键词：锂硫电池隔膜抑制“穿梭效应” 抑制锂枝晶生长锂枝晶凝胶聚合物电解质 PMIA膜 F掺杂的PMIA膜 MOF-F共掺杂的PMIA膜