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Geophysical prediction of organic matter abundance in source rocks based on geochemical analysis:A case study of southwestern Bozhong Sag,Bohai Sea,China

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Petroleum Science 2024年第1期21卷 31-53页

作者： Xiang wang Guang-Di Liu Xiao-Lin wang Jin-Feng Ma Zhen-Liang wang fei-long wang Ze-Zhang Song Chang-Yu Fan State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing102249China College of Geosciences China University of Petroleum(Beijing)Beijing102249China State Key Laboratory of Continental Dynamics Northwest UniversityXi'an710069ShaanxiChina Department of Geology Northwest UniversityXi'an710069ShaanxiChina CNOOC Tianjin Branch Company Tianjin300459China

The Bozhong Sag is the largest petroliferous sag in the Bohai Bay Basin,and the source rocks of Paleogene Dongying and Shahejie Formations were buried *** of the drillings were located at the structural high,and there were few wells that met good quality source rocks,so it is difficult to evaluate the source rocks in the study area precisely by geochemical analysis *** on the Rock-Eval pyrolysis,total organic carbon(TOC)testing,the organic matter(OM)abundance of Paleogene source rocks in the southwestern Bozhong Sag were evaluated,including the lower of second member of Dongying Formation(E_(3)d2L),the third member of Dongying Formation(E_(3)d_(3)),the first and second members of Shahejie Formation(E_(2)s_(1+2)),the third member of Shahejie Formation(E_(2)s_(3)).The results indicate that the E_(2)s_(1+2)and E_(2)s_(3)have better hydrocarbon generative potentials with the highest OM abundance,the E_(3)d_(3)are of the second good quality,and the E_(3)d2L have poor to fair hydrocarbon generative ***,the well logs were applied to predict TOC and residual hydrocarbon generation potential(S_(2))based on the sedimentary facies classification,usingΔlogR,generalizedΔlogR,logging multiple linear regression and BP neural network *** various methods were compared,and the BP neural network method have relatively better prediction *** on the pre-stack simultaneous inversion(P-wave impedance,P-wave velocity and density inversion results)and the post-stack seismic attributes,the three-dimensional(3D)seismic prediction of TOC and S_(2)was carried *** results show that the seismic near well prediction results of TOC and S_(2)based on seismic multi-attributes analysis correspond well with the results of well logging methods,and the plane prediction results are identical with the sedimentary facies map in the study *** TOC and S_(2)values of E_(2)s_(1+2)and E_(2)s_(3)are higher than those in E_(3)d_(3)and E_(3)d_(2)L,basicall

关键词： Total organic carbon(TOC) Residual hydrocarbon generation potential(S_(2)) Geophysical prediction Seismic attribute Bozhong Sag Bohai Bay Basin

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Identification and geochemical significance of unusual C24 tetracyclic terpanes in Shahejie Formation source rocks in the Bozhong subbasin,Bohai Bay Basin

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Petroleum Science 2022年第5期19卷 1993-2003页

作者： Ning wang Yao-Hui Xu fei-long wang Yan Liu Qian Huang Xing Huang Key Laboratory of Exploration Technologies for Oil and Gas Resources Ministry of EducationYangtze UniversityWuhan430100China Hubei Key Laboratory of Petroleum Geochemistry and Environment(Yangtze University) Wuhan430100China Bohai Petroleum Research Institute Tianjin BranchCNOOC(China)Ltd.Tianjin300452China

C_(24)tetracyclic terpanes are common compounds in source rocks and crude oils,and C_(24)17,21-secohopane is the most common and widely used source-related *** this study,three unusual C_(24)tetracyclic terpanes were detected on the m/z 191 chromatogram of saturated hydrocarbons in the Shahejie Formation source rocks in the Bozhong *** on the mass spectra characteristics,diagnostic ion fragments,retention time and comparisons with published literature,three unusual C_(24)tetracyclic terpanes were identified as 10β(H)-des-A-oleanane,10β(H)-des-A-lupane and C_(24)*** the best of our knowledge,this is the first study to detect and publicly report these three compounds in source rock samples from the Shahejie Formation of the Bozhong subbasin,Bohai Bay *** results indicated that 10β(H)-des-A-oleanane and 10β(H)-des-A-lupane likely originated from terre strial angiosperms,while C_(24)des-A-hopane likely originated fro m prokaryotic o *** rrestrial angiosperms provide the material basis for the generation of compounds A and B,and the distribution and concentration of these two compounds are affected by thermal *** the low maturity stage(0.5%

关键词： Unusual tetracyclic terpanes 10β(H)-des-A-oleanane 10β(H)-des-A-lupane Geochemical significance Shahejie Formation Bozhong subbasin

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Effect of welding heat input on microstructure and impact toughness in CGHAZ of X100Q steel

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Journal of Iron and Steel Research International 2019年第6期26卷 637-646页

作者： Hui-bin wang fei-long wang Gen-hao Shi Yu Sun Jiang-cheng Liu Qing-feng wang Fu-cheng Zhang State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004. Hebei China Technical Center Tianjin Pipe (Group) Co. Ltd. Tianjin 300301 China National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan University Qinhuangdao 066004 Hebei China

The coarse-grained heat-affected zones (CGHAZs) of X100Q steel were reproduced via simulating their welding thermal cycles with the varying heat input (Ef) from 10 to 55 kJ/cm in Gleeble3500 system. The microstructures were characterized, and the impact toughness was estimated from each simulated sample. The results indicate that the microstructure in each simulated CGHAZ was primarily constituted of lath-like bainite. With the decreased heat input and accordingly the lowered Ar3 (the onset temperature for this transition), the prior austenite grain and the bainitic packet/block/lath substructure were refined remarkably, and the impact toughness was enhanced due to the microstructure refinement. The bainitic packet was the microstructural unit most effectively controlling the impact properties in CGHAZ of X100Q steel, due to their close correlation with the 50% fracture appearance transition temperatures, their size equivalent to the cleavage facet and their boundaries impeding the crack propagation.

关键词： X100Q bainitic steel Coarse-grained heat-affected zone Impact property Bainitic substructure Fractography

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Sustainable Mining in the Era of Artificial Intelligence

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IEEE/CAA Journal of Automatica Sinica 2024年第1期11卷 1-4页

作者： long Chen Yuting Xie Yutong wang Shirong Ge fei-Yue wang IEEE the State Key Laboratory for Management and Control of Complex Systems at the Institute of Automation Chinese Academy of SciencesBeijing 100190China the National Laboratory of Pattern Recognition at the Institute of Automation and Waytous Ltd.China the School of Computer Science and Engineering Sun Yat-Sen UniversityGuangzhou 510275GuangdongChina the School of Mechanical Electronic and Information Engineering China University of Mining and Technology BeijingBejing 100083China the School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100190China

The mining sector historically drove the global economy but at the expense of severe environmental and health repercussions,posing sustainability challenges[1]-[3].Recent advancements on artificial intelligence(AI)are revolutionizing mining through robotic and data-driven innovations[4]-[7].While AI offers mining industry advantages,it is crucial to acknowledge the potential risks associated with its widespread ***-reliance on AI may lead to a loss of human control over mining operations in the future,resulting in unpredictable consequences.

关键词： Sustainable mining consequences

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A dual-switching spin-crossover framework with redox regulation and guest response

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Science China Chemistry 2023年第6期66卷 1744-1749页

作者： long-fei wang Si-Guo Wu Ze-Yu Ruan Ai-Qi Jian Wen Cui Zhao-Ping Ni Ming-Liang Tong Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of ChemistrySun Yat-Sen UniversityGuangzhou 510275China CNRS Centre de Recherche Paul PascalPessac F-33600France

A dual-switching spin crossover metal-organic framework(SCO-MOF)[Fe(TPB){Pt^(Ⅱ)(CN)_(4)}]·3iPrOH·4H_(2)O(TPB=1,2,4,5-tetra(pyridin-4-yl)benzene)is developed via the combination of redox-active framework and tunable *** reversible structural transformation between[Pt^(Ⅱ)(CN)_(4)]^(2-) and[Pt^(Ⅳ)Br_(2)(CN)_(4)]^(2-)moieties can be manipulated by redox post-synthetic modification(PSM),which results in the change of SCO behaviors from step-wise to *** influences of the oxidative addition of bromides on the ligand field splitting of Fe side are further explored by density functional theory ***,the modulation of hysteretic four-/three-step,one-step and four-step SCO behaviors can be achieved by tuning the composition of guest ***,the combination of electronic bistability,redox reaction and guest recognition in a homogeneous lattice provides a utility platform for designing multi-responsive molecule-based materials.

关键词： spin crossover iron(Ⅱ) post-synthetic modification redox host-guest interaction

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Ferroelectric polarization reversal tuned by magnetic field in a ferroelectric BiFeO3/Nb-doped SrTiO3 heterojunction

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Frontiers of physics 2018年第5期13卷 127-132页

作者： Pei Li Zhao-Meng Gao Xiu-Shi Huang long-fei wang Wei-Feng Zhang Hai-Zhong Guo Henan Key Laboratory of Photovoltaic Materials School of Physics and Electronics Henan University Kaifeng 475004 China School of Physical Engineering Zhengzhou University Zhengzhou 450001 China

Interracial resistive switching of a ferroelectric semiconductor heterojunction is highly advantageous for the newly developed ferroelectric memristors. Moreover, the interfacial state in the ferroelectric semiconductor heterojunction can be gradually modified by polarization reversal, which may give rise to continuously tunable resistive switching behavior. In this work, the interfacial state of a ferroelectric BiFeO3/Nb-doped SrTiO3 junction was modulated by ferroelectric polarization reversal. The dynamics of surface screening charges on the BiFeO3 layer was also investigated by surface potential measure- ments, and the decay of the surface potential could be speeded up by the magnetic field. Moreover, ferroelectric polarization reversal of the BiFeO3 layer was tuned by the magnetic field. This finding could provide a method to enhance the ferroelectric and electrical properties of ferroelectric BiFeO3 films by tuning the magnetic field.

关键词： ferroelectric semiconductor heterojunction ferroelectric polarization reversal pulsed laserdeposition Kelvin probe force microscopy

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Identifying critically ill patients at risk of death from coronavirus disease

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World Journal of Emergency Medicine 2021年第1期12卷 18-23页

作者： Wei Guo Lin-yu Ran Ji-hong Zhu Qing-gang Ge Zhe Du fei-long wang Wei-bo Gao Tian-bing wang Trauma Center Peking University People's HospitalBeijing 100044China Department of Pulmonary and Critical Care Medicine Shanghai East HospitalTongji UniversityShanghai 200120China Department of Emergency Peking University People's HospitalBeijing 100044China Department of Critical Care Unit Peking University Third HospitalBeijing 100191China

BACKGROUND:A pandemic of coronavirus disease(COVID-19)has been declared by the World Health Organization(WHO)and caring for critically ill patients is expected to be at the core of battling this ***,little is known regarding an early detection of patients at high risk of ***:This retrospective cohort study recruited consecutive adult patients admitted between February 8 and February 29,2020,to the three intensive care units(ICUs)in a designated hospital for treating COVID-19 in *** detailed clinical information and laboratory results for each patient were *** primary outcome was in-hospital *** predictors were analyzed for possible association with outcomes,and the predictive performance of indicators was assessed from the receiver operating characteristic(ROC)***:A total of 121 critically ill patients were included in the study,and 28.9%(35/121)of them died in the *** non-survivors were older and more likely to develop acute organ dysfunction,and had higher Sequential Organ Failure Assessment(SOFA)and quick SOFA(qSOFA)*** the laboratory variables on admission,we identifi ed 12 useful biomarkers for the prediction of in-hospital mortality,as suggested by area under the curve(AUC)above *** AUCs for three markers neutrophilto-lymphocyte ratio(NLR),thyroid hormones free triiodothyronine(FT3),and ferritin were 0.857,0.863,and 0.827,*** combination of two easily accessed variables NLR and ferritin had comparable AUC with SOFA score for the prediction of in-hospital mortality(0.901 vs.0.955,P=0.085).CONCLUSIONS:Acute organ dysfunction combined with older age is associated with fatal outcomes in COVID-19 *** biomarkers could be used as powerful predictors for the in-hospital mortality.

关键词： Coronavirus disease Neutrophil-to-lymphocyte ratio Mortality Predictor

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Association between uveitis and psoriatic disease: a systematic review and Meta-analysis based on the evidence from cohort studies

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International Journal of Ophthalmology(English edition) 2020年第4期13卷 650-659页

作者： Chao-Ran Li Lang Chen long-fei wang Bin Yan You-Ling Liang Jing Luo Department of Ophthalmology the Second Xiangya HospitalCentral South UniversityChangsha 410011Hunan ProvinceChina General Surgery Department the Third Xiangya HospitalCentral South UniversityChangsha 410008Hunan ProvinceChina Cardiovascular Department Xiangya HospitalCentral South UniversityChangsha 410008Hunan ProvinceChina

AIM: To conduct a systematic review and Meta-analysis to examine the association between uveitis and psoriatic disease, and to evaluate whether one condition predisposes individuals to the other. METHODS: We performed a comprehensive search of Pub Med and EMBASE to identify cohort studies examining the association between uveitis and psoriatic disease [psoriasis and/or psoriatic arthritis(Ps A)]. We used a random-effects model to calculate the pooled relative risks(RRs) adjusted for confounders, along with the 95% confidence intervals(CIs). RESULTS: This Meta-analysis included a total of 6 studies and a maximum of 80 178 648 participants. Compared with non-psoriatic controls, uveitis risk was significantly elevated in patients with psoriasis(RR=1.49;95%CI: 1.08-2.07), and Ps A(RR=3.16;95%CI: 2.16-4.63). Furthermore, pre-existing uveitis was associated with a significantly increased risk of psoriasis(RR=1.62;95%CI: 1.44-1.83), and Ps A(RR=4.44;95%CI: 3.52-5.60).CONCLUSION: The results of this systematic review and Meta-analysis suggest an overall positive bidirectional association between uveitis and psoriatic disease(psoriasis and Ps A), warranting increased awareness among clinicians involved in the management of these two ***, there remains a need for more detailed studies of the possible common pathogenesis of psoriatic disease and uveitis.

关键词： Meta-analysis psoriasis psoriatic arthritis risk uveitis

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Magnetically recoverable Cu2O/Fe_3O_4 composite photocatalysts:Fabrication and photocatalytic activity

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Chinese Chemical Letters 2014年第2期25卷 287-291页

作者： Zuo-Peng Li Ya-Qiong Wen Jian-Peng Shang Mei-Xia Wu long-fei wang Yong Guo Institute of Applied Chemistry Shanxi Datong University

A magnetically separable Cu2O/Fe3O4 magnetic composite photocatalyst was synthesized in large quantities by a fast and simple route. The as-prepared photocatalysts were characterized by scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, X-ray photoelectron spectroscopy （XPS） and X-ray diffraction （XRD）. Furthermore, the Cu2O/Fe3O4 composite photocatalysts were tested using methyl orange （MO） degradation reaction under visible light irradiation （100 mW/cm2） and demonstrated to have a high photocatalytic efficiency toward the decomposition of MO under visible light irradiation with good recyclability.

关键词： Magnetic Photocatalyst Cu2O Degradation

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Inclusion of methylviologen dication in a cadmium tetracyanoplatinate host clathrate showing photochromism and photoluminescence modulation

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Chinese Chemical Letters 2023年第3期34卷 498-501页

作者： Jiang-Zhen Qiu Ye Yu Zhuo-Fan Chen Min Zhu Yongxia Lu Qinwu Wu long-fei wang Jiang Liu College of Chemistry and Chemical Engineering Zhongkai University of Agriculture and EngineeringGuangzhou 510225China Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of ChemistrySun Yat-sen UniversityGuangzhou 510006China c School of Chemistry South China Normal UniversityGuangzhou 510006China

A cadmium tetracyanoplatinate host clathrate,(MV)[Cd_(2){Pt(CN)_(4)}_(3)]·2(H_(2)O)(1),including a methylviologen dication (MV^(2+)) was synthesized,and the crystal structures,photochromic and photoluminescence properties were *** 1,the alternatively parallel stacking between the MV^(2+)dications as electron acceptors in the channels and the electron donors[Pt1(CN)_(4)]^(2-) units in the host frameworks give a unique donor-acceptor (DA) *** UV irradiation,the electron transfer between MV^(2+) and[Pt(CN)_(4)]^(2-) ions generates MV^(·+)radicals with a photochromic behavior from pale-yellow to *** process occurs through single-crystal-to-single-crystal (SCSC) transformation and obvious structure variation of viologen cations is successfully ***,the spectral overlap between the emission bands of 1 and the absorption around 623 nm for the MV^(·+) radicals leads to a modulation of the photoluminescence.

关键词： Methylviologen dication Cadmium Polycyanidometallate clathrate Photochromism Photoluminescence

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