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建筑钢结构进展 2024年第9期26卷 34-44页

作者：姚行友胡成立聂泽谕郭彦利南昌工程学院土木与建筑工程学院南昌330099 江西省水利土木工程基础设施安全重点实验室南昌330099

为研究冷弯薄壁不等肢复杂卷边角钢屈曲性能和稳定承载力设计方法,对24根不同截面、长细比、宽厚比的不等肢复杂卷边角钢进行了轴压试验。试验结果表明,长细比较大且宽厚比较小的试件易发生弯扭屈曲,长细比较小而宽厚比较大的试件易发... 详细信息

为研究冷弯薄壁不等肢复杂卷边角钢屈曲性能和稳定承载力设计方法,对24根不同截面、长细比、宽厚比的不等肢复杂卷边角钢进行了轴压试验。试验结果表明,长细比较大且宽厚比较小的试件易发生弯扭屈曲,长细比较小而宽厚比较大的试件易发生局部屈曲或弯扭和局部相关屈曲。采用ABAQUS有限元软件对试件进行了有限元模拟,屈曲模式和承载力与试验结果吻合良好,表明建立的有限元分析模型是可行的。因此可采用经验证的有限元模型对不同长细比、卷边形式和卷边比的轴心受压不等肢复杂卷边角钢进行了参数化分析。结果表明,试件极限承载力受长细比的影响最为明显,将卷边比控制在一定范围内或改变卷边形式可提高试件极限承载力。最后将试验结果与直接强度法计算结果进行对比,表明直接强度法计算试件承载力较不安全。因此基于试验和数值分析结果提出轴心受压冷弯薄壁不等肢复杂卷边角钢构件考虑整体屈曲后强度的直接强度法修正公式,并通过对比试验结果和有限元分析结果验证了该修正公式的准确性和可行性。

关键词：冷弯薄壁型钢不等肢复杂卷边角钢弯扭屈曲局部屈曲直接强度法

荧光溶解性有机质EEMs的新旧自组织映射图解析方法比较研究

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环境科学学报 2017年第1期37卷 357-369页

作者：聂泽宇邬剑宇吴小东黄皓旻施积炎浙江大学环境与资源学院环境工程系杭州310058 浙江省水体污染控制与环境安全技术重点实验室杭州310058

目前,对地表水体荧光溶解性有机质(Fluorescent Dissolved Organic Matter,FDOM)三维激发发射矩阵(Excitation-Emission Matrices,EEMs)数据的解析仍旧存在挑战.本文结合原始EEMs和从中分离的荧光平行因子分析(Parallel Factor Analysis,PARAFAC)组分,利用自组织映射图(Self-Organizing Maps,SOM),开展了基于传统EEMs-SOM和新型PARAFAC-SOM神经网络模型的复杂荧光数据解析能力对比研究,以此探索和改进EEMs多元解析方法技术体系.模型以已发表论文原始数据为基础构建,研究对象为南太湖重要入湖河流东苕溪水系.结果显示:EEMsSOM模型需依赖常规"摘峰法"对各荧光峰做出主观判断,不能有效识别重叠荧光峰,且人为割裂多激发共发射荧光物质峰之间的联系,从而弱化分析结果的实际环境意义,但神经元的模式荧光光谱可视化效果较佳,且操作简便,耗时较少;PARAFAC-SOM模型克服了上述缺陷,可清除EEMs中的噪声或无用信息,大幅降低输入变量数(从1742个降至4个),缩减运算时间,较大地改善了输出结果的准确性,获得无损可靠且实际环境意义较强的结果,但该法的PARAFAC预处理要求较高,工作量较大;两类模型解析结论大体一致,对前期研究进行了全新的阐述和补充,且生动揭示了FDOM在多级河流水体中的空间赋存变化规律及河流的动态污染过程.综上,推荐在今后研究中综合使用两类优势互补的模型以实现对EEMs的深度解析.

关键词：荧光溶解性有机质自组织映射图 EEMs-SOM PARAFAC-SOM 东苕溪

茭白秸秆处置现状及其固态脱氮碳源材料制备循环利用思考

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江苏农业科学 2020年第12期48卷 5-5,6-10页

作者：聂泽宇王阿华陈开宁孔宇北控水务(中国)投资有限公司北京100102 中国科学院南京地理与湖泊研究所江苏南京210008 南京市市政设计研究院有限责任公司江苏南京210008

随着以长三角地区为代表的城乡经济一体化建设进程的加速,大量的农业废弃茭白秸秆亟待处理,同时污水氮素(硝酸盐态氮)污染物的减排压力亦日益增大,以资源循环利用为纽带,同时解决城乡水体污染及农村地区典型环境问题的命题逐步受到人们... 详细信息

随着以长三角地区为代表的城乡经济一体化建设进程的加速,大量的农业废弃茭白秸秆亟待处理,同时污水氮素(硝酸盐态氮)污染物的减排压力亦日益增大,以资源循环利用为纽带,同时解决城乡水体污染及农村地区典型环境问题的命题逐步受到人们的重视。当前,国内已开发多种针对茭白秸秆的环保型资源化利用处置模式,但仍难彻底满足茭白秸秆减量化的处置需求。在国内外已有研究基础上,思考探索将茭白秸秆农业废弃生物质制作成反硝化固态碳源以降低废水硝酸盐排放量的可能性,并提出了相应的研究设想,研究成果有望践行"以废治废"的城乡环境整治循环经济发展新理念,并促进城乡水生态环境的日益改善和经济可持续发展。

关键词：茭白秸秆固态碳源材料脱氮以废治废循环利用

基于氮磷比解析太湖苕溪水体营养现状及应对策略

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生态学报 2012年第1期32卷 48-55页

作者：聂泽宇梁新强邢波叶玉适钱轶超余昱葳边金云顾佳涛刘瑾陈英旭浙江大学水环境研究院杭州310029 浙江省水体污染控制与环境安全技术重点实验室杭州310029 绍兴市环境监测中心站绍兴312000

生态化学计量学是评价水体营养状态的重要手段,利用其氮磷比指标探讨了我国太湖主要入湖河流苕溪的营养状态。野外监测结果显示,苕溪水体氮素超标严重,磷素污染轻度,硝酸盐、颗粒态磷为氮磷的主要赋存形态,且氮磷浓度呈现相似的季节变... 详细信息

生态化学计量学是评价水体营养状态的重要手段,利用其氮磷比指标探讨了我国太湖主要入湖河流苕溪的营养状态。野外监测结果显示,苕溪水体氮素超标严重,磷素污染轻度,硝酸盐、颗粒态磷为氮磷的主要赋存形态,且氮磷浓度呈现相似的季节变化规律,表明苕溪主要受农业面源污染影响。氮磷比分析表明,苕溪水体春、秋季处于磷素限制状态,夏季适合藻类生长,冬季低温条件下不利于藻类的大量繁殖;苕溪生物量增长受磷素限制,线性拟合亦显示其氮磷比主要受磷素波动的调控;苕溪干流大面积暴发蓝藻水华的风险较部分支流及死水区低,苕溪水入湖后,特别是夏季其暴发风险将显著提高。针对苕溪水体的富营养化现状,提出若干条水质改善应对策略。

关键词：苕溪氮磷比水质现状富营养化水质改善

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一种基于网络受扰的自动化测试装置实现方法

汽车电器 2023年第9期 74-75页

作者：马伯祥聂泽宇李志宁段冲磊李国辉王鑫一汽解放集团股份有限公司商用车开发院电控系统开发部吉林长春130011

本文针对车载控制器的网络受扰问题,提出一种基于网络受扰的自动化测试装置的实现方法,通过说明测试装置的原理,描述该装置对车载控制器总线抗扰自动化实时过程,从而论述该解决方案的可行性。该装置用自动化代替手动测试方式,在提高可... 详细信息

本文针对车载控制器的网络受扰问题,提出一种基于网络受扰的自动化测试装置的实现方法,通过说明测试装置的原理,描述该装置对车载控制器总线抗扰自动化实时过程,从而论述该解决方案的可行性。该装置用自动化代替手动测试方式,在提高可操作性、精准性前提下,快速分析及确认车载控制器的网络抗扰能力,自动出具测试报告。

关键词：自动化测试网络受扰 CAN/CAN FD网络

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Self-assembled multiepitope nanovaccine based on NoV P particles induces effective and lasting protection against H3N2 influenza virus

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Nano Research 2023年第5期16卷 7337-7346页

作者： Jiaojiao nie Qingyu Wang Shenghui Jin Xin Yao Lipeng Xu Yaotian Chang Fan Ding zeyu Li Lulu Sun Yuhua Shi Yaming Shan National Engineering Laboratory for AIDS Vaccine School of Life SciencesJilin UniversityJilin 130012China Key Laboratory for Molecular Enzymology and Engineering The Ministry of EducationSchool of Life SciencesJilin UniversityJilin 130012China

Current seasonal influenza vaccines confer only limited coverage of virus strains due to the frequent genetic and antigenic variability of influenza virus(IV).Epitope vaccines that accurately target conserved domains provide a promising approach to increase the breadth of protection;however,poor immunogenicity greatly hinders their *** protruding(P)domain of the norovirus(NoV),which can self-assemble into a 24-mer particle called the NoV P particle,offers an ideal antigen presentation *** this study,a multiepitope nanovaccine displaying influenza epitopes(HMN-PP)was constructed based on the NoV P particle *** amounts of HMN-PP were easily expressed in Escherichia coli in soluble *** experiments showed that the adjuvanted HMN-PP nanovaccine induced epitope-specific antibodies and haemagglutinin(HA)-specific neutralizing antibodies,the antibodies could persist for at least three months after the last ***,HMN-PP induced matrix protein 2 extracellular domain(M2e)-specific antibody-dependent cell-mediated cytotoxicity,CD4^(+)and CD8^(+)T-cell responses,a nucleoprotein(NP)-specific cytotoxic T lymphocyte(CTL)*** results indicated that the combination of a multiepitope vaccine and self-assembled NoV P particles may be an ideal and effective vaccine strategy for highly variable viruses such as IV and SARS-CoV-2.

关键词： self-assemble norovirus protruding(NoV P)particle influenza virus multiepitope nanovaccine

Involvement of carbon monoxide produced by heme oxygenase in ABA-induced stomatal closure in Vicia faba and its proposed signal transduction pathway

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Chinese Science Bulletin 2007年第17期52卷 2365-2373页

作者： CAO zeyu HUANG BenKai WANG QingYa XUAN Wei LING TengFang ZHANG Bo CHEN Xi nie Li SHEN WenBiaot College of Life Sciences Laboratory Centre of Life Sciences Nanjing Agricultural University Nanjing 210095 China

Carbon monoxide (CO) has recently proven to be an important bioactive or signaling molecule in mammalian cells. Its effects are mainly mediated by nitric oxide (NO) and cyclic GMP (cGMP). In Vicia faba leaves, CO production and heme oxygenase (HO) activity, an important CO synthetic enzyme, are first reported to increase in response to ABA treatment, which could result in stomatal closure. Inter- estingly, ABA-induced stomatal closure in V. faba guard cells is partially blocked when the synthetic CO inhibitor ZnPP, or the CO/NO scavenger Hb is added. Furthermore, we show that, exogenously applied CO donor, hematin, and CO aqueous solution not only result in the enhancement of CO release, but also time-dependently induce stomatal closure, and the latter is mimicked by the application of an NO donor SNP. The above-mentioned stomatal closure effects are differentially reversed by the addition of tungstate, a potent inhibitor of NO synthetic enzyme nitrate reductase (NR), the specific NO scavenger cPTIO, ZnPP, or Hb. During treatment for 4 h, SNP, 0.01% CO aqueous solution or hematin significantly triggers NO synthesis, whereas cPTIO, or tungstate approximately fully inhibits NO fluorescence. Ad- ditionally, application of the GC inhibitor ODQ blocks CO-induced stomatal closure. This inhibition could be reversed when 8-Br-cGMP is added. Thus, the above results suggest that CO produced by HO is involved in ABA-induced stomatal closure, and NO and cGMP may function as downstream interme- diates in the CO signaling responsible for stomatal closure.

关键词：一氧化碳血红素加氧酶气孔关闭信号传递一氧化氮

Monolayer MoS_(2)-based transistors with low contact resistance by inserting ultrathin Al_(2)O_(3)interfacial layer

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Science China(Technological Sciences) 2023年第6期66卷 1831-1840页

作者： CHEN Gang LIN Xin LIU Yuan WANG Fang HU Kai SHAN Xin WU zeyu ZHANG YuPeng nie WeiCan ZHONG JiXiang REN TianLing ZHANG KaiLiang Tianjin Key Laboratory of Film Electronic&Communication Devices School of Integrated Circuit Science and EngineeringTianjin University of TechnologyTianjin 300384China School of Materials Science and Engineering Tianjin University of TechnologyTianjin 300384China Tianjin Key Laboratory of Composite and Functional Materials Key Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education)School of Materials Science and EngineeringTianjin UniversityTianjin 300072China School of Integrated Circuits Beijing National Research Center for Information Science and Technology(BNRist)Tsinghua UniversityBeijing 100084China

Transition metal dichalcogenides(TMDCs)are promising high performance electronic materials due to their interesting semiconductor ***,it is acknowledged that the effective electrical contact between TMDCs-layered materials and metals remains one of the major *** this work,the homogeneous monolayer MoS_(2)films with high crystalline quality were prepared by chemical vapor deposition method on SiO2/Si *** back-gate field-effect transistors(FETs)were fabricated by inserting an ultrathin Al_(2)O_(3)interlayer between the metal electrodes and MoS_(2)*** the addition of an ultrathin 0.8 nm Al_(2)O_(3)interlayer,the contact resistance decreased dramatically from 59.9 to 1.3 kΩμm and the Schottky barrier height(SBH)dropped from 102 to 27 meV compared with devices without the Al_(2)O_(3)*** the same time,the switching ratio increased from~106to~108,and both the on-current and field-effect mobility were greatly *** find that the ultrathin Al_(2)O_(3)interlayer can not only reduce the SBH to alleviate the Fermi level pinning phenomenon at the interface,but also protect the channel materials from the influence of air and moisture as a covering *** addition,the lattice and band structures of Al_(2)O_(3)/MoS_(2)film were calculated and analyzed by first-principles *** is found that the total density of states of the Al_(2)O_(3)/MoS_(2)film exhibits interfacial polarized metals property,which proves the higher carrier transport *** with Al_(2)O_(3)interlayers have excellent stability and repeatability,which can provide effective references for future low power and high performance electronic devices.

关键词： MoS_(2) Schottky barrier height contact resistance Al_(2)O_(3)interlayer first-principles calculation

Ultrafast Carbonized Wood of Electrode-Scaled Aligned-Porous Structure for High-Performance Lithium Batteries

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Transactions of Tianjin University 2023年第5期29卷 387-394页

作者： Shaojie Chen Lu nie Hongsheng Shi Xiangchen Hu zeyu Wang Xinshui Zhang Yuyao Zhang Qilin Hu Tianyi Gao Yi Yu Wei Liu School of Physical Science and Technology Shanghai Tech UniversityShanghai 201210China Shanghai Key Laboratory of High-Resolution Electron Microscopy Shanghai Tech UniversityShanghai 201210China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China

The use of carbonized wood in various functional devices is attracting considerable attention due to its low cost,vertical channels,and high electrical ***,the conventional carbonization method requires a long processing time and an inert ***,a microwave-assisted ultrafast carbonization technique was developed that carbonizes natural wood in seconds without the need for an inert atmosphere,and the obtained aligned-porous carbonized wood provided an excellent electrochemical performance as an anode material for lithium-ion *** ultrafast carbonization technique simultaneously produced ZnO nanoparticles during the carbonization process that were uniformly distributed on the alignedporous *** hierarchical structure of carbonized wood functionalized with ZnO nanoparticles was used as a host for achieving high-performance lithium-sulfur batteries:the highly conductive carbonized wood framework with vertical channels provided good electron transport pathways,and the homogeneously dispersed ZnO nanoparticles effectively adsorbed lithium polysulfide and catalyzed its conversion *** summary,a new method was developed to realize the ultrafast carbonization of biomass materials with decorated metal oxide nanoparticles.

关键词： Lithium–Sulfur battery Shuttle effect Lithium-ion battery Biomass carbonization