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Nuclear Science and Techniques 2016年第3期27卷 80-87页

作者： Ya-Lei He Ji-Hao li lin-Fan li jing-Bo Chen jing-ye li School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002China CAS Center for Excellence on TMSR Energy System Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201800China

Gamma-ray irradiation technique is an effective method for preparing graphene aerogel(GA).The effective reduction and self-assembly of graphene oxide(GO) sheets into 3D porous GA in ethylenediamine(EDA) aqueous solution under the protection of nitrogen have been achieved via γ-ray *** reduction degree and self-assembly process,which can be controlled by varying EDA dose and irradiation dose,are investigated by X-ray photoelectron spectroscopy,Fourier transform infrared spectroscopy,X-ray diffractometer,and thermogravimetric analysis.A reduction mechanism is proposed for interactions among EDA molecules,active radicals from the radiolysis of water,and oxygen-containing groups on GO sheets.

关键词： γ射线照射氧化石墨乙二胺自组装协同还原溶液傅里叶变换红外光谱 X射线光电子能谱

lithofacies identi cation using support vector machine based on local deep multi-kernel learning

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Petroleum Science 2020年第4期17卷 954-966页

作者： Xing-ye liu lin Zhou Xiao-Hong Chen jing-ye li Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation College of Geology and EnvironmentXi’an University of Science and TechnologyXi’an 710054ShaanxiChina Hunan Provincial Key Laboratory of Shale Gas Resource Utilization Hunan University of Science and TechnologyXiangtan 411201HunanChina State Key Laboratory of Petroleum Resources and Prospecting National Engineering Laboratory for Ofshore Oil ExplorationChina University of Petroleum-BeijingBeijing 102249China

lithofacies identification is a crucial work in reservoir characterization and *** vast inter-well area can be supplemented by facies identification of seismic ***,the relationship between lithofacies and seismic information that is affected by many factors is *** learning has received extensive attention in recent years,among which support vector machine(SVM) is a potential method for lithofacies *** classification involves identifying various types of lithofacies and is generally a nonlinear problem,which needs to be solved by means of the kernel ***-kernel learning SVM is one of the main tools for solving the nonlinear problem about ***,it is very difficult to determine the kernel function and the parameters,which is restricted by human ***,its computational efficiency is low.A lithofacies classification method based on local deep multi-kernel learning support vector machine(LDMKL-SVM) that can consider low-dimensional global features and high-dimensional local features is *** method can automatically learn parameters of kernel function and SVM to build a relationship between lithofacies and seismic elastic *** calculation speed will be expedited at no cost with respect to discriminant accuracy for multi-class lithofacies *** the model data test results and the field data application results certify advantages of the *** contribution offers an effective method for lithofacies recognition and reservoir prediction by using SVM.

关键词： lithofacies discriminant Support vector machine Multi-kernel learning Reservoir prediction Machine learning

A high resolution inversion method for fluid factor with dynamic dryrock V_(P)/V_(S) ratio squared

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Petroleum Science 2023年第5期20卷 2822-2834页

作者： lin Zhou Jian-Ping liao Xing-ye liu Pu Wang Ya-Nan Guo jing-ye li School of Earth Sciences and Spatial Information Engineering Hunan University of Science and TechnologyXiangtan 411201HunanChina Key Laboratory of Earth Exploration and Information Technology of Ministry of Education College of GeophysicsChengdu University of TechnologyChengdu 610059SichuanChina Hunan Key Laboratory of Nonferrous Resources and Geological Hazards Exploration School of Geoscience and Info-PhysicsCentral South UniversityChangsha 410083HunanChina Exploration&Development Research Institute PetroChinaQinghai Oilfield CompanyDunhuang 736202GansuChina College of Geophysics China University of Petroleum(Beijing)Beijing 102249China

As an important indicator parameter of fluid identification,fluid factor has always been a concern for ***,when predicting Russell fluid factor or effective pore-fluid bulk modulus,it is necessary to introduce a new rock skeleton parameter which is the dry-rock VP/VS ratio squared(DVRS).In the process of fluid factor calculation or inversion,the existing methods take this parameter as a static constant,which has been estimated in advance,and then apply it to the fluid factor calculation and *** fluid identification analysis based on a portion of the Marmousi 2 model and numerical forward modeling test show that,taking the DVRS as a static constant will limit the identification ability of fluid factor and reduce the inversion *** solve the above problems,we proposed a new method to regard the DVRS as a dynamic variable varying with depth and lithology for the first time,then apply it to fluid factor calculation and ***,the exact Zoeppritz equations are rewritten into a new form containing the fluid factor and DVRS of upper and lower ***,the new equations are applied to the four parameters simultaneous inversion based on the generalized nonlinear inversion(GNI)*** testing results on a portion of the Marmousi 2 model and field data show that dynamic DVRS can significantly improve the fluid factor identification ability,effectively suppress *** synthetic and filed data tests also demonstrate that the GNI method based on Bayesian deterministic inversion(BDI)theory can successfully solve the above four parameter simultaneous inversion problem,and taking the dynamic DVRS as a target inversion parameter can effectively improve the inversion accuracy of fluid *** these results completely verified the feasibility and effectiveness of the proposed method.

关键词： Fluid factor Dry-rock V_(P)/V_(S)ratio squared(DVRS) Dynamic variable Multiple parameters simultaneous inversion Generalized nonlinear inversion(GNI)

Radiation graft of acrylamide onto polyethylene separators for lithium-ion batteries

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Nuclear Science and Techniques 2017年第6期28卷 108-114页

作者： Xiao-li Miao Ji-Hao li Qun Xiang Jia-Qiang Xu lin-Fan li jing-ye li Shanghai Institute of Applied Physics Chinese Academy of Science Department of Chemistry College of ScienceShanghai University

To improve the affinity between separators and electrolyte in lithium-ion battery,microporous polyethylene(PE) separator was grafted of polyacrylamide(PAAm) by *** structure of the PAAmgrafted PE separators(denoted as PE-g-PAAm) was characterized by Fourier transform infrared spectroscopy and X-ray photoelectron *** of the pristine PE and PE-g-PAAm were tested by scanning electron microscope,liquid electrolyte uptake and lithium-ion *** performances of the grafted PE separators(up to 0.76 × 10^(-3) S/cm of ionic conductivity at room temperature) were much better than pristine PE,and performance of the battery with the grafted separator behaved better than with the virgin PE separator,under the same condition(assembled in Ar-filled glove box).

关键词： lithium-ion battery Polyethylene Acrylamide Irradiation graft Separator

Radiation-induced cross-linking:a novel avenue to permanent 3D modification of polymeric membranes

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Nuclear Science and Techniques 2021年第7期32卷 31-45页

作者： Yu Gu Bo-Wu Zhang Zhen Guo Ji-Hao li Ming Yu lin-Fan li jing-ye li Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China MOE Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials College of Chemistry and Materials ScienceShanghai Normal UniversityShanghai 200234China University of Chinese Academy of Sciences Beijing 100049China

Membrane fouling is always the biggest problem in the practice of membrane separation technologies,which strongly impacts their applicability,separation efficiency,cost effectiveness,and service ***,a simple but effective 3D modification approach was designed for permanently functionalizing polymeric membranes by directly cross-linking polyvinyl alcohol(PVA)under gamma-ray irradiation at room temperature without any *** the modification,a PVA layer was constructed on the membrane surface and the pore inner surface of polyvinylidene fluoride(PVDF)*** endowed them with good hydrophilicity,low adsorption of protein model foulants,and easy recoverability *** addition,the pore size and distribution were customized by controlling the PVA concentration,which enhanced the rejection ability of the resultant membranes and converted them from microfiltration to *** crosslinked PVA layer was equipped with the resultant membranes with good resistance to chemical cleaning by acidic,alkaline,and oxidative reagents,which could greatly prolong the membrane service ***,this approach was demonstrated as a universal method to modify PVDF membranes with other hydrophilic macromolecular modifiers,including polyethylene glycol,sodium alginate,and polyvinyl *** modification of the membranes effectively endowed them with good hydrophilicity and antifouling properties,as expected.

关键词： Ultrafiltration membrane Antifouling 3D modification Gamma-ray Cross-linking

Fabrication of stable MWCNT bucky paper for solar-driven interfacial evaporation by coupling c-ray irradiation with borate crosslinking

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Nuclear Science and Techniques 2021年第12期32卷 13-25页

作者： Yu-Qing Qiao Yu Gu Yu-Sen Meng Hai-Xia li Bo-Wu Zhang jing-ye li MOE Key Lab of Resource Chemistry Shanghai Key Lab of Rare Earth Functional MaterialsCollege of Chemistry and Materials ScienceShanghai Normal UniversityShanghai 200234China yellow River Institute of Eco-Environmental Research Yellow River Basin Ecology and Environment AdministrationZhengzhou 450000China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China School of Civil and Architectural Engineering Nanjing Tech University Pujiang InstituteNanjing 211134China

Herein,we report a facile solution process for preparing multi-walled carbon nanotube(MWCNT)bucky paper for solar-driven interfacial water *** process involves vacuum filtrating a dispersion of MWCNTs that was modified by polyvinyl alcohol(PVA)under c-ray irradiation on a cellulose acetate microporous membrane,followed by borate *** transform infrared spectroscopy,Raman spectroscopy,and thermogravimetry confirmed the success of PVA grafting onto MWCNTs and borate crosslinking between modified MWCNT *** as-prepared crosslinked MWCNT bucky papers(BBP membranes)were used as a solar absorber,by placing them on a paper-wrapped floating platform,for interfacial water evaporation under simulated solar *** BBP membranes showed good water tolerance and mechanical stability,with an evaporation rate of 0.79 kg m^(-2)h^(-1)and an evaporation efficiency of 56%under 1 sun illumination in deionized ***,the BBP membranes achieved an evaporation rate of 0.76 kg m^(-2)h^(-1)in both NaCl solution(3.5 wt%)and sulfuric acid solution(1 mol L-1),demonstrating their impressive applicability for water reclamation from brine and acidic *** evaporation rate of 0.70 kg m-2 h-1(very close to that from deionized water)was obtained from the solar evaporation of saturated NaCl solution,and the BBP membrane exhibited unexpected stability without the inference of salt accumulation on the membrane surface during long-term continuous solar evaporation.

关键词： c-ray irradiation Multi-walled carbon nanotubes Bucky paper Solar-driven interfacial water evaporation Desalination

Nonlinear amplitude versus angle inversion for transversely isotropic media with vertical symmetry axis using new weak anisotropy approximation equations

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Petroleum Science 2020年第3期17卷 628-644页

作者： lin Zhou Zhuo-Chao Chen jing-ye li Xiao-Hong Chen Xing-ye liu Jian-Ping liao Hunan Provincial Key Laboratory of Shale Gas Resource Utilization Hunan University of Science and TechnologyXiangtan 411201HunanChina State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing 102249China National Engineering Laboratory for Offshore Oil Exploration.China University of Petroleum Beijing 102249China College of Geology and Environment Xi'anUniversity of Science and TechnologyXi'an 710054ShaanxiChina

In VTI media,the conventional inversion methods based on the existing approximation formulas are difficult to accurately estimate the anisotropic parameters of reservoirs,even more so for unconventional reservoirs with strong seismic ***,the above problems can be solved by utilizing the exact reflection coefficients ***,their complicated expression increases the difficulty in calculating the Jacobian matrix when applying them to the Bayesian deterministic ***,the new reduced approximation equations starting from the exact equations are derived here by linearizing the slowness *** relatively simple form and satisfactory calculation accuracy make the reduced equations easy to apply for inversion while ensuring the accuracy of the inversion *** addition,the blockiness constraint,which follows the differentiable Laplace distribution,is added to the prior model to improve contrasts between ***,the concept of Gli and an iterative reweighted least-squares algorithm is combined to solve the objective ***,we obtain the iterative solution expression of the elastic parameters and anisotropy parameters and achieve nonlinear AVA inversion based on the reduced *** test results of synthetic data and field data show that the proposed method can accurately obtain the VTI parameters from prestack AVA seismic data.

关键词： Transversely isotropic media with vertical symmetry axis(VTI) New reduced approximation equations Differentiable Laplace distribution Blockiness constraint

Stability study of Disperse Blue 79 under ionizing radiation

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Nuclear Science and Techniques 2020年第2期31卷 113-123页

作者： Xiao-Jun Ding Ming Yu Xin Zheng Cui-Cui ye Yu Gu Man-li Lu Bo-Wu Zhang lin-Fan li jing-ye li Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China The Education Ministry Key Lab of Resource Chemistry Shanghai Key Lab of Rare Earth Functional MaterialsCollege of Chemistry and Materials ScienceShanghai Normal UniversityShanghai 200234China

Ionizing radiation is a promising method for dye degradation or textile coloration using commercial azo dyes and small molecular weight organic dyes. Thus, the stability of the molecular structure of an azo dye is important under ionizing radiation. Disperse Blue 79, as an example azo dyes, was irradiated with gamma rays or electron beam (EB) to investigate the radiation-induced effects on the molecular structure. Ultraviolet visible spectroscopy (UV Vis), nuclear magnetic resonance (NMR) spectra analysis, and mass spectrometry (MS) studies indicated that acetoxy and methoxyl were easily cleaved on the irradiation of the aqueous dye solution but retained a stable structure on the irradiation of the powder form. Gamma rays and EB showed similar effects on the decomposition process. Chromaticity changes using the Lab* method showed that the dye turned to dark yellow and the value of b* of the irradiated dyes increased with the increasing absorbed dose, which indicated that Disperse Blue 79 could be partly decomposed in an aqueous solution This work was nancially supported by the National Natural Science Foundation of China (Nos. 11875313, 11605274, and 11575277). Xiao-Jun Ding and Ming Yu contributed equally to this work. & jing-ye li jyli@*** 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China 2 University of Chinese Academy of Sciences, Beijing 100049, China 3 The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Lab of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, China with an absorbed dose of 10 kGy. Furthermore, the results demonstrated that the chemical stability of the Disperse Blue 79 under ionizing radiation are different in its powder form with the dye in the aqueous solution.

关键词： Azo dyes Disperse Blue 79 Stability

Electron-beam radiation effects on the structure and properties of polypropylene at low dose rates

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Nuclear Science and Techniques 2018年第6期29卷 101-109页

作者： Heng-Ti Wang Hai-Qing Jiang Rong-Fang Shen Xiao-Jun Ding Cong Zhang lin-Fan li jing-ye li Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China University of Chinese Academy of Sciences Beijing 100049China

While the high-energy radiation effects on polypropylene, which are crucial for the cable industry for nuclear power plants, have been thoroughly studied, the property changes of PP at low-dose-rate electron-beam irradiation are far from elucidated. Herein, the influence of electron-beam irradiation on the structure and properties of PP was examined. The static EB irradiation conditions were 1.2 MeV at a low dose rate of 20 kGy/h to achieve absorbed doses ranging from 45, to 60, 100, and 200 *** molecular structure was first evaluated by measuring the carboxyl index and the relative radical concentrations via Fourier transform infrared spectroscopy and electron spin resonance, respectively. Mechanical, differential scanning colorimetric, and rheological tests were carried out to further investigate the changes in the properties(tensile, crystalizing, and viscoelastic properties) of irradiated PP, which showed good agreement with the structural analysis results. We found that radio-oxidative degradation(chain scission) was predominant, which can be due to the low dose rate facilitating oxygen diffusion into the PP matrix during electron-beam irradiation.

关键词：性质变化低剂量率聚丙烯电子横梁结构放射 Fourier

Amidoxime-based adsorbents prepared by cografting acrylic acid with acrylonitrile onto HDPE fiber for the recovery of uranium from seawater

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Nuclear Science and Techniques 2017年第4期28卷 13-18页

作者： Lu Xu Jiang-Tao Hu Hong-Juan Ma Chang-Jian ling Mou-Hua Wang Rong-Fang Shen Xiao-jing Guo Yin-Ning Wang jing-ye li Guo-Zhong Wu Shanghai Institute of Applied Physics Chinese Academy of Sciences Nuclear and Radiation Safety Center Ministry of Environmental Protection of the People's Republic of China

An amidoxime-based polymeric adsorbent was prepared by pre-irradiation grafting of acrylonitrile and acrylic acid onto high-density polyethylene fibers using electron beams,followed by *** recovery of uranium was investigated by flow-through experiment using simulated seawater and marine test in natural *** maximum amount of uranium uptake was 2.51 mg/g-ads after 42 days of contact with simulated seawater and 0.13 mg/g-ads for 15 days of contact with natural seawater.A lower uranium uptake in marine test can be attributed to the short adsorption time and the contamination of marine microorganisms and ***,the high selectivity toward uranium against vanadium may be beneficial to harvest uranyl ion onto adsorbents and the economic feasibility for recovery of uranium from seawater.

关键词： Radiation-induced grafting Amidoxime Acrylonitrile Uranium Selectivity