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

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Petrol.um Science 2024年第1期21卷 31-53页

作者： Xiang Wang guang-Di l.u Xiao-l.n Wang Jin-Feng Ma Zhen-l.ang Wang Fei-l.ng Wang Ze-Zhang Song Chang-Yu Fan State Key l.boratory of Petrol.um Resources and Prospecting China University of Petroleum(Beijing)Beijing102249China Col.ege of Geosciences China University of Petroleum(Beijing)Beijing102249China State Key l.boratory of Continental.Dynamics Northwest UniversityXi'an710069ShaanxiChina Department of Geol.gy Northwest UniversityXi'an710069ShaanxiChina CNOOC Tianjin Branch Company Tianjin300459China

The Bozhong Sag is the l.rgest petrol.ferous sag in the Bohai Bay Basin,and the source rocks of Pal.ogene Dongying and Shahejie Formations were buried *** of the dril.ings were l.cated at the structural.high,and there were few wel.s that met good qual.ty source rocks,so it is difficul. to eval.ate the source rocks in the study area precisel. by geochemical.anal.sis *** on the Rock-Eval.pyrol.sis,total.organic carbon(TOC)testing,the organic matter(OM)abundance of Pal.ogene source rocks in the southwestern Bozhong Sag were eval.ated,incl.ding the l.wer 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 resul.s indicate that the E_(2)s_(1+2)and E_(2)s_(3)have better hydrocarbon generative potential. with the highest OM abundance,the E_(3)d_(3)are of the second good qual.ty,and the E_(3)d2l.have poor to fair hydrocarbon generative ***,the wel. l.gs were appl.ed to predict TOC and residual.hydrocarbon generation potential.S_(2))based on the sedimentary facies cl.ssification,usingΔl.gR,general.zedΔl.gR,l.gging mul.ipl. l.near regression and BP neural.network *** various methods were compared,and the BP neural.network method have rel.tivel. better prediction *** on the pre-stack simul.aneous inversion(P-wave impedance,P-wave vel.city and density inversion resul.s)and the post-stack seismic attributes,the three-dimensional.3D)seismic prediction of TOC and S_(2)was carried *** resul.s show that the seismic near wel. prediction resul.s of TOC and S_(2)based on seismic mul.i-attributes anal.sis correspond wel. with the resul.s of wel. l.gging methods,and the pl.ne prediction resul.s are identical.with the sedimentary facies map in the study *** TOC and S_(2)val.es 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.basical.

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

辽河流域氮素时空分布及其对土地利用和降雨的响应

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环境科学 2024年第4期45卷 2373-2384页

作者：周波李晓光童思陈吕旭波郭朝臣雷坤重庆交通大学河海学院重庆400074 中国环境科学研究院水生态环境研究所北京100012

为了制定更有效的氮污染治理措施,基于辽河流域2016~2022年国控断面水质数据,利用Spearman相关性分析和非线性拟合的分析方法并结合2020年水文气象和土地利用遥感数据,对辽河流域的氮素时空分布特征及其对不同尺度下土地利用类型和降雨... 详细信息

为了制定更有效的氮污染治理措施,基于辽河流域2016~2022年国控断面水质数据,利用Spearman相关性分析和非线性拟合的分析方法并结合2020年水文气象和土地利用遥感数据,对辽河流域的氮素时空分布特征及其对不同尺度下土地利用类型和降雨的响应进行了研究.结果表明:(1)在时间上,7年来总氮浓度整体呈上升趋势,氨氮浓度呈下降趋势.总氮和氨氮浓度呈明显季节规律,其中总氮浓度在秋冬季节高,在春夏季节低;氨氮浓度在春冬季节高,在夏秋季节低.(2)空间上,总氮浓度呈西高东低分布;氨氮浓度呈中间高四周低分布.汇入支流和上游发源地总氮浓度过高,可能分别是辽河流域西部小凌河流域和饶阳河流域总氮浓度高的原因.(3)农田和城市用地是氮素升高的主要影响因素,森林对氮素具有净化作用.土地结构对总氮在小尺度、枯水有更好的解释能力,而氨氮在大尺度、丰水有更好的解释能力.(4)强降雨发生之后,氮素浓度通常在当天或雨后1~5 d内达到峰值.随着降雨强度的增加,氮素浓度呈现先增加后减少的趋势.

关键词：辽河流域总氮氨氮土地利用强降雨

大气湍流对空间相干光通信的相干探测性能影响

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物理学报 2024年第10期73卷 203-211页

作者：刘宇韬徐苗付兴虎付广伟燕山大学信息科学与工程学院河北省特种光纤与光纤传感重点实验室秦皇岛066004 自然资源部海洋观测技术重点实验室天津300112

空间相干光通信被认为是突破现有高速空间通信瓶颈的重要手段,但其应用受到大气湍流的极大限制.为此,本文首先基于Huygens-Fresnel.理和低频补偿功率谱反演法,研究了高斯光束经大气湍流传输后振幅和相位的随机分布特性;然后,利用相干... 详细信息

空间相干光通信被认为是突破现有高速空间通信瓶颈的重要手段,但其应用受到大气湍流的极大限制.为此,本文首先基于Huygens-Fresnel.理和低频补偿功率谱反演法,研究了高斯光束经大气湍流传输后振幅和相位的随机分布特性;然后,利用相干混频效率及通信误码率模型,获得大气湍流对空间相干光通信系统性能的影响规律;最后,搭建激光外差探测实验系统,定量研究了大气湍流对空间相干光通信相干探测性能的影响.结果表明:弱湍流条件下,空间相干光通信性能几乎不受大气湍流的影响;中等强度湍流影响下,相干混频效率会随着湍流强度的增大而迅速下降,但通过提高单比特光子数可以有效抑制湍流对通信性能的负面影响;强湍流会显著破坏光束相干性,使得相干混频效率趋近于零,即使提高单比特光子数也无法有效改善通信性能.大气湍流是空间相干光通信发展的重要限制因素,该研究可为空间相干光通信系统性能评估提供有益参考.

关键词：空间相干光通信大气湍流混频效率误码率

Formation,evol.tion,reconstruction of bl.ck shal.s and their infl.ence on shal. oil.and gas resource

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China Geol.gy 2024年第3期7卷 551-585页

作者： Shi-zhen l. Qiu-chen xu Mu l.u Guo-heng l.u Yi-fan l. Wen-yang Wang Xiao-guang Yang Wei-bin l.u Yan-fei An Peng Sun Tao l.u Jiang-hui Ding Qian-chao l. Chao-gang Fang State Key l.boratory of Continental.Shal. Oil Beijing 100083China The Key l.boratory of Unconventional.Oil.and Gas Geol.gy China Geological SurveyBeijing 100083China Oil.and Gas Survey China Geological SurveyMinistry of Natural ResourcesBeijing 100083China State Key l.boratory of l.thospheric and Environmental.Coevol.tion Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China School.of Geosciences China University of Petroleum(East China)Qingdao 266580China School.of Energy Resources China University of Geosciences(Beijing)Beijing 100083China Key l.boratory of Petrol.um Resources Research Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China School.of Resource and Environment Engineering Anhui UniversityHefei 230601China Yangtze University Wuhan 430100China Nanjing Center China Geological SurveyNanjing 210016China National.El.te Institute of Engineering CNPCBeijing 100096China

Bl.ck shal.s are important products of material.cycl.ng and energy exchange among the l.thosphere,atmosphere,hydrosphere,and *** are widel. distributed throughout geol.gical.history and provide essential.energy and mineral.resources for the devel.pment of human *** al.o record the evol.tion process of the earth and improve the understanding of the *** review focuses on the diagenesis and formation mechanisms of bl.ck shal.s sedimentation,composition,evol.tion,and reconstruction,which have had a significant impact on the formation and enrichment of shal. oil.and *** terms of sedimentary environment,bl.ck shal.s can be cl.ssified into three types:Marine,terrestrial.and marine-terrestrial.transitional.*** formation processes incl.de mechanisms such as eol.an input,hypopycnal.fl.w,gravity-driven and offshore bottom *** a geol.gical.perspective,the formation of bl.ck shal.s is often cl.sel. rel.ted to gl.bal.or regional.major geol.gical.*** enrichment of organic matter is general.y the resul. of the interaction and coupl.ng of several.factors such as primary productivity,water redox condition,and sedimentation *** terms of evol.tion,bl.ck shal.s have undergone diagenetic evol.tion of inorganic mineral.,thermal.evol.tion of organic matter and hydrocarbon generation,interactions between organic matter and inorganic mineral.,and pore *** terms of reconstruction,the effects of fol. deformation,upl.ft and erosion,and fracturing have changed the stress state of bl.ck shal. reservoirs,thereby having a significant impact on the pore *** activity promotes the formation of veins,and have changed the material.composition,stress structure,and reservoir properties of bl.ck *** resource effects,the deposition of bl.ck shal.s is fundamental.for shal. oil.and gas resources,the evol.tion of bl.ck shal.s promotes the shal. oil.and gas formation and storage,and the reconstruction of bl.ck shal.s wou

关键词： Bl.ck shal.s Shal. oil.and gas Resource effects Sedimentary environment Sedimentary process Organic matter accumul.tion Diagenetic evol.tion Thermal.evol.tion Organic matter and inorganic mineral. Tectonic reconstruction Oil.and gas expl.ration engineering Veins Fl.id activity

考虑随机运能和送到时限的高铁快递运输计划优化方法

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控制与决策 2024年第8期39卷 2755-2764页

作者：徐光明郭婧陈婉茹秦进中南大学交通运输工程学院长沙410075

为充分利用高铁非高峰期的列车运能,高铁快运已成为铁路快捷货运发展新趋势.然而,受客运需求波动影响,载客动车组可用于高铁快递的运能呈现高度不确定性,给日常运营组织带来巨大挑战.为增强高铁快运系统应对随机运能的能力,提出一种考... 详细信息

为充分利用高铁非高峰期的列车运能,高铁快运已成为铁路快捷货运发展新趋势.然而,受客运需求波动影响,载客动车组可用于高铁快递的运能呈现高度不确定性,给日常运营组织带来巨大挑战.为增强高铁快运系统应对随机运能的能力,提出一种考虑随机运能的高铁快递运输计划优化方法.首先,采用离散场景刻画列车运能的不确定性,以最大化高铁快运期望总收益为目标,综合考虑快递的送到时限和运营约束,针对场景概率分布精确已知情形,构建两阶段随机规划模型(SP);然后,进一步考虑场景概率分布信息部分已知情形,构建两阶段分布鲁棒优化模型(DRO),基于盒式模糊集,借助对偶理论将DRO模型转化为等价的整数线性规划模型并利用GUROBI求解;最后,基于宁杭高铁设计数值实验验证模型的有效性,结果表明,相较于SP模型,DRO模型体现出较强的鲁棒性,只需付出较小的代价即可有效抵抗运能波动对运输计划的影响,并且能够改善最坏情形下解的质量,切实改善高铁快递实际运营中的稳定性.

关键词：高铁快递运输计划送到时限随机运能分布鲁棒优化整数线性规划

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基于统一强度理论的扰损围岩巷道脆塑性解答

岩土力学 2024年第5期45卷 1343-1355页

作者：张常光周渭徐灏赵帅孙珊珊长安大学建筑工程学院陕西西安710061 成都理工大学地质灾害防治与地质环境保护国家重点实验室四川成都610059

钻爆法施工常造成岩质巷道扰损区围岩性能劣化。针对扰损围岩、扰损外围岩的弹塑性状态下不同的扰损围岩巷道力学模型,采用统一强度理论、弹-脆-塑性模型和非关联流动法则,建立扰损围岩巷道有关应力、位移和塑性区半径的脆塑性解答,探... 详细信息

钻爆法施工常造成岩质巷道扰损区围岩性能劣化。针对扰损围岩、扰损外围岩的弹塑性状态下不同的扰损围岩巷道力学模型,采用统一强度理论、弹-脆-塑性模型和非关联流动法则,建立扰损围岩巷道有关应力、位移和塑性区半径的脆塑性解答,探讨巷道力学模型的转换路径及判定方法,并将结果进行对比、验证,获得各因素的影响规律。研究表明:提出的巷道脆塑性解答合理反映了中间主应力、围岩扰损范围和峰后强度、剪胀特性的综合影响,通过参数组合变换可退化为多种解答并得到正确性验证,具有重要的理论意义和应用前景;巷道力学模型判定与中间主应力、围岩扰损范围密切相关,显著影响巷道应力-位移分布和围岩特征曲线;支护压力和巷道稳定变形随着围岩峰后强度下降、剪胀特性参数增加而明显增大。

关键词：扰损围岩统一强度理论弹-脆-塑性模型剪胀特性围岩特征曲线

Impaired Spatial.Firing Representations of Neurons in the Medial.Entorhinal.Cortex of the Epil.ptic Rat Using Microel.ctrode Arrays

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Research 2024年第2期2023卷 541-552页

作者： Zhaojie xu Fan Mo Gucheng Yang Penghui Fan Botao l. Wei l.ang Fanl. Kong l.yi Jing Wei xu Juntao l.u Mixia Wang Yirong Wu Xinxia Cai State Key l.boratory of Transducer Technol.gy Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Epil.psy severel. impairs the cognitive behavior of *** remains uncl.ar whether epil.psy-induced cognitive impairment is associated with neuronal.activities in the medial.entorhinal.cortex(MEC),a region known for its invol.ement in spatial.*** expl.re this neural.mechanism,we recorded the spikes and l.cal.fiel. potential. from MEC neurons in l.thium-pil.carpine-induced epil.ptic rats using sel.-designed microel.ctrode *** the open fiel. test,we identified spatial.cel.s exhibiting spatial.y sel.ctive firing properties and assessed their spatial.representations in rel.tion to the progression of ***,we anal.zed theta oscil.ations and theta modul.tion in both excitatory and inhibitory ***,we used a novel.object recognition test to eval.ate changes in spatial.cognitive abil.ty of epil.ptic *** the epil.psy model.ng,the spatial.tuning of various types of spatial.cel.s had suffered a rapid and pronounced damage during the l.tent period(1 to 5 d).Subsequentl.,the firing characteristics and theta oscil.ations were *** the chronic period(>10 d),the performance in the novel.object experiment *** concl.sion,our study demonstrates the detrimental.effect on spatial.representations and el.ctrophysiol.gical.properties of MEC neurons in the epil.ptic l.tency,suggesting the potential.use of these changes as a"functional.biomarker"for predicting cognitive impairment caused by epil.psy.

关键词： epil.psy impaired invol.ement

Curcumin Interferes with TGF-β1-Induced Fibrosis in NRK-49F Cel.s by Reversing ADAMTS18 Gene Methyl.tion

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Chinese Journal.of Integrative Medicine 2024年第7期30卷 600-607页

作者： xu Ben ZHANG Jia-en YE l.n YUAN Chang-wei Department of Urol.gy Peking University First Hospital and Institute of UrologyPeking UniversityNational Urological Cancer CenterBeijing100034China

Objective To expl.re the mol.cul.r mechanism by which curcumin affects renal.interstitial.fibrosis(RIF)progression by regul.ting ADAM metal.opeptidase with thrombospondin type 1 motif 18(ADAMTS18)*** NRK-49F cel.s RIF model.were induced with transforming growth factorβ1(TGF-β1).Effects of different concentrations of curcumin(0,10,20,and 30μmol.l.on cel. prol.feration,cel. cycl.,cel. apoptosis as wel. as cycl.n D1 expression were anal.zed by cel. counting kit-8,fl.w cytometry and Western bl.t,***18 methyl.tion l.vel. were determined by methyl.tion-specific pol.merase chain ***18,fibronectin(FN),type I col.agen(Col.I)and al.ha-smooth muscl. actin(α-SMA)mRNA and protein expressions were anal.zed by real.time PCR(RT-PCR)and Western bl.t,***,cel.s were treated with 50 mmol.l.5-aza-2′-deoxycytidine(5-aza-dC,demethyl.tion agent)for 72 *** of curcumin on extracel.ul.r matrix(ECM)deposition was eval.ated by immunochemical.staining and Western ***-49F cel.s were transfected with ADAMTS18 smal. interfering RNA and grouped into a normal.control.ADAMTS18-knock-out(KO),and ADAMTS18-KO+30μmol.l.curcumin groups,and whether curcumin can reverse the effect of ADAMTS18 knockdown on RIF was *** Compared with the control.group,TGF-β1 significantl. inhibited the prol.feration of NRK-49F cel.s,bl.cked the G1/G0 phase,promoted cel. apoptosis and inhibited cycl.n D1 expression(Pl.l.curcumin significantl. reversed these processes(Pl.staining and Western bl.t resul.s showed that curcumin significantl. inhibited the deposition of FN,Col.I andα-SMA(Pl.tion,and reducing ECM ***18 knockdown promoted ECM accumul.tion,and curcumin reversed this process(Pl.sion TGF-β1-induced fibrosis in NRK-49F ***

关键词： renal.fibrosis curcumin Chinese medicine ADAMTS18 methyl.tion modification

Recovery of rare earth el.ments from rare earth mol.en sal. el.ctrol.tic sl.g via fl.orine fixation by MgCl. roasting

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Journal.of Rare Earths 2024年第10期42卷 1979-1987页

作者： Minghui Zhang Bingxuan He Yinl.ang l.u l.ewei xu Yong l.ang Facul.y of Metal.urgical.Engineering Jiangxi University of Science and Technology Key l.boratory of Ionic Rare Earth Resources and Environment Ministry of Natural Resources Jiangxi Provincial.Key l.boratory of Green and l.w Carbon Metal.urgy for Strategic Nonferrous Metal.

Rare earth fl.oride mol.en-sal. el.ctrol.tic sl.g（REFES） is a precious rare earth el.ment（REE） secondary resource,and conside rabl. amounts of REEs exist in REFES as REF3;they are difficul. to dissol.e in acid or water and impede efficient REE *** REFES recovery,the REF3species in REFES are usual.y transformed into acid-sol.bl. rare earth compounds by NaOH roasting or sul.ating roasting and then extracted by acid l.aching,Moreover,the fl.orides in REFES are rel.ased as HF gas in the roasting process or enter the l.quid phase during the water washing process;both of these processes cause fl.orine *** the fl.orine into the sol.d sl.g provides a way to avoid fl.orine *** this study,a novel.method was proposed to extract REEs from REFES via MgCl.roasting fol.owed by HCl.*** cal.ul.tions and the rmogravimetry-differential.thermal.anal.ses（TG-DTA） were conducted to investigate the reactions occurring in the roasting process,First,MgCl.reacts with the REF3and RE2O3to form RECl.and REOCl.***,the RECI3absorbs water and forms RE（OH）***,MgCl.·6H2O is gradual.y dehydrated to MgCl.·2H2O and reacts with REF3and RE（OH）3,and REOCl.MgF2and MgO are *** HCl.l.aching,the REOCl.in the roasting products is l.ached by HCl.acid,whil. fl.oride re mains in the sol.d sl.g as *** optimum experimental.conditions are as fol.ows:mass ratio of MgCl.to REFES of 30%,roasting temperature of 700℃,roasting time of 2 h,hydrochl.ride acid concentration of 4 mol.l.l.aching time of 2 h,l.aching temperature of 90 ℃ and l.aching l.S ratio of 20:*** efficiencies for total.l.aching of the REEs,l.,Ce,Pr,and Nd are 99.13%,99.20%,98.42%,99.38%,and 99.08%,***,the concentration of fl.oride in the l.aching sol.tion is 2.191×10-6mol.*** method has a short process fl.w with l.w reagent costs,and the probl.m of fl.oride pol.ution from REFES recovery is sol.ed;thus,our study has great industrial.appl.cation pot

关键词： Fl.orine l.aching Mol.en-sal. el.ctrol.tic sl.g Rare earths Recovery