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Importance of conformance control in reinforcing synergy of CO_(2) EOR and sequestration

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Petroleum Science 2022年第6期19卷 3088-3106页

作者： yang Zhao Zhen-Hua Rui Zheng Zhang Si-Wei Chen Ren-Feng yang Kai Du Birol Dindoruk Tao yang Erling H.Stenby Malcolm A.Wilson State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing 102249China College of Petroleum Engineering China University of Petroleum(Beijing)Beijing 102249China College of Carbon Neutrality Future Technology China University of Petroleum(Beijing)Beijing 102249China College of Petroleum China University of Petroleum(Beijing)at KaramayKaramayXinjiang 83400China CNOOC Research Institute Co. Ltd.Beijing 100029China University of Houston USA Equinor Ovre StokkaveiStavangerNorway Technical University of Denmark Denmark University of Regina Canada

Injecting CO2into hydrocarbon reservoirs can enhance the recovery of hydrocarbon resources,and simultaneously,CO2can be stored in the rese rvoirs,reducing considerable amount of carbon emissions in the ***,injected CO_(2)tends to go through fractures,high-permeability channels and streaks present in reservoirs,resulting in inefficient hydrocarbon recovery coupled with low CO_(2)storage *** treatments with CO_(2)-resistant crosslinked polymer gels were performed in this study to mitigate the CO_(2)channeling issue and promote the synergy between enhanced oil recovery(EOR) and subsurface sequestration of CO_(2).Based on a typical low-permeability CO_(2)-flooding reservoir in China,studies were performed to investigate the EOR and CO_(2)storage performance with and without conformance *** effect of permeability contrast between the channels and rese rvoir matrices,treatment size,and plugging strength on the efficiency of oil recovery and CO_(2)storage was systematically *** results indicated that after conformance treatments,the CO_(2)channeling problem was mitigated during CO_(2)flooding and *** injected CO_(2)was more effectively utilized to recover the hydrocarbons,and entered wider spectrum of pore ***,more CO_(2)was trapped *** factors on the synergy of EOR and CO_(2)storage were figured *** with the treatment size,the CO_(2)storage efficiency was more sensitive to the plugging strength of the conformance treatment *** observation was important for conformance treatment design in CCUS-EOR *** to this study,the materials should reduce the channel permeability to make the channel/matrix permeability ratio below *** results demonstrate the importance of conformance treatment in maximizing the performance of CCUS-EOR process to achieve both oil recovery improvement and efficient carbon *** study provides guidelines for suc

关键词： Enhanced oil recovery(EOR) CO_(2)geological sequestration Conformance control Gel treatment CCUS Low-permeability reservoir

Data-driven interpretable analysis for polysaccharide yield prediction

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Environmental Science and Ecotechnology 2024年第3期19卷 91-99页

作者： Yushi Tian Xu yang Nianhua Chen Chunyan Li Wulin yang School of Resource and Environment Northeast Agriculture UniversityHarbin150030PR China College of Environmental Sciences and Engineering Peking UniversityBeijing100871PR China

Cornstalks show promise as a raw material for polysaccharide production through *** and accurate prediction of polysaccharide yield can facilitate process optimization,eliminating the need for extensive experimentation in actual production to refine reaction conditions,thereby saving time and ***,the intricate interplay of enzymatic factors poses challenges in predicting and optimizing polysaccharide yield ***,we introduce an innovative data-driven approach leveraging multiple artificial intelligence techniques to enhance polysaccharide *** propose a machine learning framework to identify highly accurate polysaccharide yield prediction modeling methods and uncover optimal enzymatic parameter ***,Random Forest(RF)and eXtreme Gradient Boost(XGB)demonstrate robust performance,achieving prediction accuracies of 93.0%and 95.6%,respectively,while an independently developed deep neural network(DNN)model achieves 91.1%accuracy.A feature importance analysis of XGB reveals the enzyme solution volume's dominant role(43.7%),followed by time(20.7%),substrate concentration(15%),temperature(15%),and pH(5.6%).Further interpretability analysis unveils complex parameter interactions and potential optimization *** data-driven approach,incorporating machine learning,deep learning,and interpretable analysis,offers a viable pathway for polysaccharide yield prediction and the potential recovery of various agricultural residues.

关键词： Cornstalk Xylanase Polysaccharide yield prediction Machine learning Model interpretability

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某大型铜矿球磨机提高磨矿效率的实践研究

有色金属（选矿部分） 2016年第2期 65-68页

作者：邓东锋陕西有色集团有限公司陕西银矿西安710068

针对球磨机工作效率低、磨矿细度不稳定等问题进行技术分析,综合生产工艺、矿石性质、选矿技术和设备结构等四个方面的技术研究,制定了提高效率的方案,在较低投入的基础上进行了技术改造,使球磨机处理能力提高了25%,磨矿细度更加符合选... 详细信息

针对球磨机工作效率低、磨矿细度不稳定等问题进行技术分析,综合生产工艺、矿石性质、选矿技术和设备结构等四个方面的技术研究,制定了提高效率的方案,在较低投入的基础上进行了技术改造,使球磨机处理能力提高了25%,磨矿细度更加符合选矿需要。不但创造了巨大的经济效益,也降低了每吨矿石的能源消耗,具有很高的实用价值。

关键词：球磨机磨矿效率改造技术

Facile synthesis of nanostructured LiFePO_4/C cathode material for lithium-ion batteries

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Chinese Science Bulletin 2012年第32期57卷 4160-4163页

作者： yang ZhanXu QIAO QingDong KANG XiaoXue yang WenSheng School of Petrochemical Engineering Liaoning Shihua UniversityFushun 113001China State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China

Nanostructured LiFePO4/C cathode material was prepared by FePO4·2H2O/C precursor by in situ restriction *** synthesized LiFePO4/C cathode material presents a narrow distribution of nano-sized particles and exhibits an excellent electrochemical property with various *** facile synthesis route for the preparation of nano-sized LiFePO4 material has the particular advantage of simple synthesis process and low synthesis cost.

关键词： LiFePO4 正极材料纳米结构锂离子电池简易合成磷酸铁锂材料制备电化学性能

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美国利益集团对美中贸易摩擦的影响

开放导报 2006年第3期 60-63页

作者：齐东锋南开大学国际经济研究所天津300071

随着中国产品的产出能力与出口竞争力日益增强,中国在出口领域与其他国家的贸易摩擦也在不断上升。本文分析了各种利益集团对美国政府对华贸易政策的不同诉求,研究了利益集团因素对美中贸易摩擦的影响,并就我国如何应对提出了若干政策... 详细信息

随着中国产品的产出能力与出口竞争力日益增强,中国在出口领域与其他国家的贸易摩擦也在不断上升。本文分析了各种利益集团对美国政府对华贸易政策的不同诉求,研究了利益集团因素对美中贸易摩擦的影响,并就我国如何应对提出了若干政策建议。

关键词：贸易关系利益集团美国中国贸易摩擦

Signatures of Quantum Criticality in the Complex Inverse Temperature Plane

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Chinese Physics Letters 2023年第5期40卷 14-18页

作者：刘洋吕松泰杨洋邹海源 Key Laboratory of Polar Materials and Devices(MOE) School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China

Concepts of the complex partition functions and the Fisher zeros provide intrinsic statistical mechanisms for finite temperature and real time dynamical phase *** extend the utility of these complexifications to quantum phase *** exactly identify different Fisher zeros on lines or closed curves and elucidate their correspondence with domain-wall excitations or confined mesons for the one-dimensional transverse field Ising *** crossover behavior of the Fisher zeros provides a fascinating picture for criticality near the quantum phase transition,where the excitation energy scales are quantitatively *** further confirm our results by tensor network calculations and demonstrate a clear signal of deconfined meson excitations from the disruption of the closed zero *** results unambiguously show significant features of Fisher zeros for a quantum phase transition and open up a new route to explore quantum criticality.

关键词： excitation quantum meson

Supra-amphiphilic transparent mesoporous silica coating

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Chinese Science Bulletin 2006年第21期51卷 2572-2575页

作者： MA Jin yang Zhenglong QU Xiaozhong yang Zhenzhong State Key Laboratory of Polymer Physics and Chemistry Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China

Transparent mesoporous silica coatings were achieved by conventional sol-gel process. The obtained coatings display permanent supra- amphiphilicity, transparent appearance and good wetting property with very fast spread rate. Incorpo- ration of functional materials such as crystalline tita- nia nanoparticles into the coatings was also carried out without affecting the transparency and supra- amphiphilicity.

关键词：间隙孔硅石敷层溶胶-凝胶两性分子

Selective laser melted high Ni content TiNi alloy with superior superelasticity and hardwearing

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Journal of Materials Science & Technology 2022年第21期116卷 246-257页

作者： Hui Shen Qingquan Zhang Ying yang yang Ren Yanbao Guo Yafeng yang Zhonghan Li Zhiwei Xiong Xiangguang Kong Zhihui Zhang Fangmin Guo Lishan Cui Shijie Hao State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China The Key Laboratory of Bionic Engineering(Ministry of Education)and the College of Biological and Agricultural Engineering Jilin UniversityChangchun 130025China Department of Physics City University of Hong KongKowloonHong KongChina College of Mechanical and Transportation Engineering China University of PetroleumBeijing 102249China State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

TiNi alloys with high content Ni(52-55 at.%)are perfectly suitable for preparing wear-and corrosionresistant parts that service on the space station,spacecraft,and submarine,because of their superior superelasticity,high strength,and ***,the fabrication of complicated Ni-rich TiNi parts by the traditional machining method often faces problems of poor precision,low efficiency,and high *** this work,we succeed in preparing an excellent Ti_(47)Ni_(53) alloy by selective laser melting(SLM),and thus,open a new way for the efficient and precise formation of complicated Ni-rich TiNi parts with superelasticity and *** optimized processing window for compact parts without defects is *** elaborately fabricated Ti_(47)Ni_(53) alloy exhibited a breaking strain of 11%,a breaking stress of 2.0 GPa,a superelastic strain of 9%,and a better hardwearing than that of casting and quenched Ti_(47)Ni_(53) ***,the microstructure,phase transformation,and deformation,as well as their influence mechanisms are investigated by in situ transmission electron microscope(TEM)and high-energy X-ray diffraction(HE-XRD).The results obtained are of significance for both fundamental research and technological applications of SLM-fabricated high Ni content TiNi alloys.

关键词： Selective laser melting High Ni content TiNi Superelasticity Wear In situ high-energy X-ray diffraction Microstructure

Grain boundary boosting the thermal stability of Pt/CeO_(2)thin films

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Nano Research 2023年第2期16卷 3278-3286页

作者： Luyao Wang Xiaobao Li Xiangchen Hu Shuyue Chen Zhehao Qiu Yifan Wang Hui Zhang Yi Yu Bo yang Yong yang Pasquale Orgiani Carmela Aruta Nan yang Electrochemical thin film group School of physical science and technologyShanghaiTech UniversityShanghai 201210China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China School of physical science and technology ShanghaiTech UniversityShanghai 201210China CNR-IOM TASC National LaboratoryI-34149 TriesteItaly CNR-SPIN UOS RomaArea della Ricerca di Tor VergataRome I-00133Italy

Understanding how defect chemistry of oxide material influences the thermal stability of noble metal dopant ions plays an important role in designing high-performance heterogeneous catalytic *** we use in-situ ambient-pressure X-ray photoemission spectroscopy(APXPS)to experimentally determine the role of grain boundary in the thermal stability of platinum doped cerium oxide(Pt/CeO_(2)).The grain boundaries were introduced in Pt/CeO_(2)thin films by pulsed laser deposition without significantly change of the surface *** defect level was tuned by the strain field obtained using a highly/low mismatched *** Pt/CeO_(2)thin film models having well defined crystallographic properties but different grain boundary structural defect levels provide an ideal platform for exploring the evolution of Pt–O–Ce bond with changing the temperature in reducing *** have direct demonstration and explanation of the role of Ce^(3+)induced by grain boundaries in enhancing Pt2+*** observe that the Pt^(2+)–O–Ce^(3+)bond provides an ideal coordinated site for anchoring of Pt^(2+)ions and limits the further formation of oxygen vacancies during the reduction with H_(2).Our findings demonstrate the importance of grain boundary in the atomic-scale design of thermally stable catalytic active sites.

关键词： platinum doped cerium oxide(Pt/CeO_(2)) pulsed laser deposition epitaxial thin films grain boundaries defect engineering in-situ ambient-pressure X-ray photoemission spectroscopy