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基于拉曼光谱的汽油牌号快速识别

光谱学与光谱分析 2010年第11期30卷 2993-2997页

作者：李晟戴连奎浙江大学工业控制技术国家重点实验室浙江杭州310027

提出了一种基于拉曼光谱的汽油牌号快速识别方法。该方法首先基于已知牌号的成品汽油样本进行建模,获取不同牌号成品汽油建模样本的拉曼谱图,经过谱图预处理后对谱图进行主成分分析(principal component analysis,简称PCA),获得载荷矩... 详细信息

提出了一种基于拉曼光谱的汽油牌号快速识别方法。该方法首先基于已知牌号的成品汽油样本进行建模,获取不同牌号成品汽油建模样本的拉曼谱图,经过谱图预处理后对谱图进行主成分分析(principal component analysis,简称PCA),获得载荷矩阵和得分矩阵,同时分别计算不同牌号汽油样本的平均得分向量,即不同牌号的得分中心坐标;然后对未知牌号汽油样本进行识别,先将未知牌号汽油样本拉曼谱图进行相同的谱图预处理,再计算该样品在载荷矩阵上的得分向量,根据PCA类中心最小距离法,计算该得分向量到不同牌号的得分中心坐标的欧式距离,依最小距离直接确定汽油牌号。针对45个取自国内不同炼油厂的成品汽油样本的实验结果表明这些汽油样本拉曼谱图经谱图预处理和PCA后,不同牌号汽油样本在主元得分空间上存在明显类间距,使用PCA类中心最小距离法可实现汽油牌号快速准确的分类。

关键词：拉曼光谱汽油牌号快速识别主成分分析

Toxic effects of perfluorononanoic acid on the development of Zebrafish(Danio rerio) embryos

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Journal of Environmental Sciences 2015年第6期27卷 26-34页

作者： Hui Liu Nan sheng Wei Zhang Jiayin dai Key Laboratory of Animal Ecology and Conservation Biology Institute of Zoology Chinese Academy of Sciences University of Chinese Academy of Sciences

Perfluorononanoic acid（PFNA） is a nine-carbon perfluoroalkyl acid widely used in industrial and domestic products. It is a persistent organic pollutant found in the environment as well as in the tissues of humans and wildlife. There is a concern that this chemical might be a developmental toxicant and teratogen in various ecosystems. In the present study,the toxic effects of PFNA were evaluated in zebrafish（Danio rerio） embryos. One hour post-fertilization embryos were treated with 0, 25, 50, 100, 200, 300, 350, and 400 μmol/L PFNA for 96 hr in 6-well plates. Developmental phenotypes and hatching rates were observed and recorded. Nineteen genes related to oxidative stress and lipid metabolism were examined using Quantitative RT-PCR and confirmed by whole mount in situ hybridization（WISH）. Results showed that PFNA delayed the development of zebrafish embryos, reduced the hatching rate, and caused ventricular edema and malformation of the spine. In addition, the amount of reactive oxygen species in the embryo bodies increased significantly after exposure to PFNA compared with that of the control group. The Quantitative RT-PCR and WISH experiments demonstrated that m RNA expression of the lfabp and ucp2 genes increased significantly while that of sod1 and mt-nd1 decreased significantly after PFNA exposure. The m RNA expression levels of gpx1 and mt-atp6 decreased significantly in the high concentration group. However, the m RNA expression levels of both ppara and pparg did not show any significant variation after exposure. These findings suggest that PFNA affected the development of zebrafish embryos at relatively low concentrations.

关键词： Perfluorononanoic acid Zebrafish embryo Danio rerio Developmental toxicity

Surface microlayer enrichment of volatile organic compounds and semi-volatile organic compounds in drinking water source

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Journal of Environmental Sciences 2004年第1期16卷 56-60页

作者： HUANGZhi ZHOUWen YUYa-juan ZHANGAi-qian HANShuo-kui WANGLian-sheng StateKeyLaboratoryofPollutionControlandSourcesReuse SchooloftheEnvironmentNanjingUniversityNanjing210093China

Enrichment of volatile organic compounds(VOC) and semi-volatility organic compounds(SVOC) in surface microlayer(SM) of three drinking water sources were studied. The enrichment factor( EF s) were 0.67 to 13.37 and 0.16 to 136, respectively. The results showed some VOC and most SVOC could enrich in SM. Some EF s of SVOC was quite high. Suspension and temperature could affect EF s of SVOC, slim wind and water movement do not destroy enrichment of organic in SM.

关键词： surface microlayer enrichment GC-MS SPE

Influence of particle size on combustion behavior of bamboo char used for blast furnace injection

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Journal of Iron and Steel Research International 2018年第12期25卷 1213-1222页

作者： Run-sheng Xu Wei Wang Bo-wen dai State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Wuhan 430081HubeiChina Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081HubeiChina

The combustion behavior of bamboo char and its relationship with particle sizes were evaluated using thermo-gravimetric *** results showed that the combustion properties of bamboo char were much better than those of the anthracite used as a coal injected for blast furnace ironmaking due to its porous structure,disordered microcrystalline and higher catalytic index of ash *** the particle size increased from -0.074 to 0.500-1.000 mm,the ignition temperature and burnout temperature of bamboo char increased,while the combustible index and comprehensive combustion characteristic index decreased *** apparent activation energies of non-isothermal combustion of bamboo char and anthracite were calculated based on the distributed activation energy *** results showed that the average activation energy was 162.86 kJ/mol for-0.074 mm anthracite,while it ranged from 71.01 to 89.44 kJ/mol for bamboo chars of different *** revealed that the combustion reactivity of bamboo char in the largest size (0.500-1.000 mm)was much better than that of -0.074 mm,anthracite;thus,the size of biomass char could be enlarged to the maximum size specified by the injection application of blast furnace.

关键词： Bamboo char Blast furnace injection Particle size Combustion characteristics Kinetics

New correlations for evaluating the equivalent bare charge mass for a cased charge

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Defence Technology（防务技术） 2023年第10期28卷 251-266页

作者： Long-kui Chen sheng-hong Huang Hong-jin Chen He-ming Wen CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsUniversity of Science and Technology of ChinaHefei230026China

Munitions contain casings that consume explosive *** blast load(e.g.,peak overpressure and maximum impulse)intensity generated by ammunition explosion will be lower than that generated by a bare charge with equal *** evaluate the blast load of a cased charge under different conditions,the equivalent bare mass needs to be ***,the accuracy of existing correlations strongly depends on the empirical determination of relevant controlling parameters and lacks theoretical *** this paper,new correlations are proposed based on a more rigorous theoretical derivation,considering both the mechanical behaviors of the casing’s material and the change of the polytropic exponent during the expansion process of the explosion *** controlling parameters are attributed to the rupture radius ratio and the polytropic exponent of detonation products expansion to casing rupture *** reasonability is validated by both comprehensive numerical simulations with dynamic mechanical constitutive model and theoretical *** results calculated by the new correlation show better agreement with the experimental results than those calculated by previous correlations,and the results difference is explained in more consistency with the thermos-physical properties of the charge and mechanical behaviors of casing ***,the correlation of the cased-to-bare impulse ratio is also theoretically improved,providing a more accurate theoretical basis for both the equivalent bare mass and impulse evaluation for a cased charge.

关键词： Cased charge Energy conservation Equivalent bare charge Fracture strain Polytropic exponent

Adsorption and mechanistic study of the invasive plant-derived biochar functionalized with CaAl-LDH for Eu(Ⅲ) in water

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Journal of Environmental Sciences 2020年第10期32卷 127-137页

作者： shengbo Li Lijia Dong Zuofu Wei Guodong sheng kui Du Baowei Hu School of Life Science School of Chernistry and Chemical EngineeringShaoxing UniversityShaoxing 312000China School of Life Science Shanxi Normal UniuersityLinfen 041004China

Herein,we developed the invasive plant-derived biochar (IPB) functionalized with CaAl-LDH at five mass ratios using a physical mixture method,assessed their adsorption perform for Eu(Ⅲ),and explored the relative *** show that the IPB successfully loaded CaAl-LDH in five composites and their Eu(Ⅲ) sorption affinities were strongly affected by solution p H,contact time,temperature,and the mass ratio of LDH and *** the sorpiton process for Eu(Ⅲ) occurred on the heterogeneous surface of five composites and the boundary layer diffusion limited the chemical sorption ***,the CaAl-LDH/IPB composite with high ratio of IPB had higher sorption capacity than the one with high ratio of LDH due to larger porosity of the *** mechanisms containing ion exchange between Al and Eu ions,surface complexation with carboxyl-and oxygen-containing functional groups,and precipitation were involved in the Eu(Ⅲ) sorption,but the dominant sorption mechanism for each CaAl-LDH/IPB composite differed with different mass ratio of CaAl-LDH and *** composite with more IPB (e.g.,CaAl-LDH/IPB-13),both ion exchange and surface complexes dominated the sorption process and the intensity of Eu^3+ was identified with the one of *** in composites with high LDH,ion exchange dominated the sorption and the intensity of Eu^3+ was obviously higher than the one of Eu_2O_*** research will provide a new perspective for the application of the LDH/biochar materials.

关键词： Invasive plants Biochar LDH Europium sorption

Glutamatergic CYLD deletion leads to aberrant excitatory activity in the basolateral amygdala:association with enhanced cued fear expression

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Neural Regeneration Research 2025年第11期20卷 3259-3272页

作者： Huidong Li Faqin Li Zhaoyi Chen Erwen Wu Xiaoxi dai Danni Li Haojie An Shiyi Zeng Chunyan Wang Li Yang Cheng Long School of Life Sciences South China Normal UniversityGuangzhouGuangdong ProvinceChina School of Life Sciences Guangzhou UniversityGuangzhouGuangdong ProvinceChina Guangdong Provincial Key Laboratory of Major Obstetric Diseases The Third Affiliated Hospital of Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina South China Normal University-Panyu Central Hospital Joint Laboratory of Translational Medical Research Panyu Central HospitalGuangzhouGuangdong ProvinceChina

Neuronal activity,synaptic transmission,and molecular changes in the basolateral amygdala play critical roles in fear ***(CYLD)is a deubiquitinase that negatively regulates the nuclear factor kappa-B *** is well studied in non-neuronal cells,yet underinvestigated in the brain,where it is highly *** studies have shown involvement of CYLD in the remodeling of glutamatergic synapses,neuroinflammation,fear memory,and anxiety-and autism-like ***,the precise role of CYLD in glutamatergic neurons is largely ***,we first proposed involvement of CYLD in cued fear *** next constructed transgenic model mice with specific deletion of Cyld from glutamatergic *** results show that glutamatergic CYLD deficiency exaggerated the expression of cued fear in only male ***,loss of CYLD in glutamatergic neurons resulted in enhanced neuronal activation,impaired excitatory synaptic transmission,and altered levels of glutamate receptors accompanied by over-activation of microglia in the basolateral amygdala of male ***,our study suggests a critical role of glutamatergic CYLD in maintaining normal neuronal,synaptic,and microglial *** may contribute,at least in part,to cued fear expression.

关键词： basolateral amygdala cued fear expression cylindromatosis deubiquitinase glutamate receptor 1 glutamatergic neuron microglial activation N-methyl-D-aspartate receptor 1 neuronal activation synaptic transmission

Conversion of Methane to Ethylene with BaCe_(0.9)Y_(0.1)Co_(x)O_(3-δ)Hydrogen Permeation Membrane

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Chinese Journal of Structural Chemistry 2021年第7期40卷 901-907,839页

作者： LIU Yun YUAN sheng-Ze XIE kui College of Chemistry Fuzhou UniversityFuzhou 350116China Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China

Dehydrogenation coupling of methane(DCM),which can be effectively used to produce low carbon alkenes,has the advantages of rich raw materials,simple reaction device,low energy consumption,***,we report a series of Co doped perovskite porous-dense BaCe_(0.9)Y_(0.1)Co_(x)O_(3-δ)(BCYCx)membrane for *** treatment in a reduced atmosphere,a large number of Co nanoparticles will exsolute on the surface of *** metal-oxide interface is helpful to activate the C–H bonds,inhibit the carbon deposition,and so *** XRD,SEM and XPS prove that Co nanoparticles homogeneously distributed on the BCYCx porous layers,which will create a large quantity of catalytic active *** 1100℃,the highest concentration of C_(2)product was 5.66%(5.25%ethane+0.41%ethylene)in output gas when methane conversion reaches a maximum value of 24.8%,and the C_(2)selectivity gets to 45.6%.We further demonstrate the catalytic performance of high-temperature DCM without obvious decrease after running for 30 hours.

关键词： mixed-conducting dehydrogenation methane metal nanoparticle membrane

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水锤钻机应力释放法防范隧洞岩爆风险的试验研究与示范

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水利建设与管理 2025年第1期45卷 49-54页

作者：胡奎四川二滩国际工程咨询有限公司四川成都610503

在隧道施工中,岩爆会威胁施工人员的安全,是施工进程中的严重安全隐患。当前,岩爆预防和治理已成为国际性的技术难题,特别是在高强度岩爆频发的区域,其关乎隧道掘进机械(TBM)的安全与连续作业。为有效应对这一挑战,在引汉济渭岭南TBM第... 详细信息

在隧道施工中,岩爆会威胁施工人员的安全,是施工进程中的严重安全隐患。当前,岩爆预防和治理已成为国际性的技术难题,特别是在高强度岩爆频发的区域,其关乎隧道掘进机械(TBM)的安全与连续作业。为有效应对这一挑战,在引汉济渭岭南TBM第二掘进段施工中采用水锤钻机进行超前应力释放试验。通过收集和分析试验数据,初步确定了在何种地质条件下需要实施水锤钻机超前应力释放孔,并制定了相应的施工参数。这些成果将为隧道施工的工程实践提供有力的参考依据,确保工程的安全高效推进。

关键词：不良地质 TBM 岩爆水锤钻机超前应力释放