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Rare earth element and yttrium(REY) geochemistry in carbonate reservoirs during deep burial diagenesis:Implications for REY mobility during thermochemical sulfate reduction

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Rare earth element and yttrium(REY) geochemistry in carbonat...

中国科学院地质与地球物理研究所2015年度（第15届）学术年会

作者： Lei Jiang Chunfang Cai Richard H.Worden kaikai li Lei Xiang Xuelei Chu Anjiang Shen Wenjun li Key Laboratory of Petroleum Resources Research Institute of Geology and GeophysicsChinese Academy of Sciences Department of Earth Ocean and Ecological SciencesUniversity of Liverpool Energy Resource Department China University of GeosciencesBeijing State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Hangzhou Research Institute of Geology Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of Sciences

The impact of burial diagenesis(especially deep burial-related processes such as thermochemical sulfate reduction,TSR) on the distribution of rare earth elements and yttrium(REY) in diagenetic minerals in carbonate reservoir has gained little attention even though they may be unique indicators of the diagenetic system being closed or open to external influx of *** element and REY concentrations,Sr/Sr,δO and δC have been determined for limestone,host dolomite,pore-filling calcite(calcite-2),and late stage fracturefilling calcite(calcite-3),barite(barite-2) and anhydrite(anhydrite-3) from Lower Triassic Feixianguan Formation reservoirs in northeast Sichuan Basin,***-2,calcite-3,barite-2,and anhydrite-3 precipitated during deep burial(from 110 ℃ to 220 ℃).demonstrated by petrology and fluid inclusion *** isotope analysis revealed that diagenetic carbonate minerals and anhydrite have largely identical Sr/Sr ratios to Triassic seawater,indicating negligible input of Sr from terrigenous sources and probably a relatively closed diagenetic environment for precipitation of these *** isotope analysis showed that calcite-2 has relatively low δC values(down to — 18.9‰ V-PDB),suggesting that they are TSR calcites with the carbonate derived from oxidized,isotopically-light *** the seawater-like REY patterns of the limestone and dolomites,calcite-3 and anhydrite-3 are enriched in rare earth elements(2REE) and show light rare earth element enrichment and heavy rare earth element depletion,exhibiting a chevron-like pattern of shale normalized REY *** contrast,TSR calcite(calcitc-2) has similar ΣREE to the host dolomite but a relatively flat REY pattern,suggesting strong variations in elemental and REE compositions of the burial ***,TSR calcite shows a prominent positive Eu anomaly and an unusually high-chondritic Y/Ho *** yttrium versus holmium fractionation and Eu oxidation to Eu must have oc

关键词： Thermochemical sulfate reduction(TSR) Rare earth element and yttrium(REY) Carbonate diagenesis Micro thermometry Stable isotope geochemistry 87Sr/86Sr

PI3K Regulatory Subunit P85 Regulates Mouse Cortical Development

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PI3K Regulatory Subunit P85 Regulates Mouse Cortical Develop...

中国神经科学学会第十二届全国学术会议

作者： Xinran Cheng kaikai li Meng Meng liu Xinde Hu Mingrui Xu Runchuan Yan Shanting Zhao College of Veterinary Medicine Northwest A&F University Institute of Neuroscience State Key Laboratory of Neuroscience Key Laboratory of Primate Neurobiology CAS Center for Excellence in Brain Science and Intelligence Technology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences College of Food Science and Engineering Northwest A&F University

Mouse cortical development requires an exquisite regulation of neurons production and neuronal migration. Neurons production is mainly depend on the balance between proliferation and differentiation of neural progenitor cells（NPCs） and neural stem cells（NSCs）, and after that, projection neurons migrate from the ventricular zone（VZ） to the cortical plate（CP）, guided by radial glial cells（RGCs） with a transformation between bipolar and multipolar morphology. Previous studies have demonstrated that the PI3 K-Akt-m TOR signaling pathway plays a critical role in brain development. However, the function of p85 subunit in cortical development is still unclear. In this study, through primary neuron culture and in utero electroporation combined with immunohistochemistry and microscope image, we analyzed the function of p85 in mouse cortical development. Our results showed that overexpression of p85 inhibited NPCs proliferation. Also, overexpression of p85 perturbed the transition from intermediate neuronal progenitors（INPs） to projection neurons, and restrained neuronal ***’s more, we found that overexpression of p85 impaired cortical neuronal migration by affecting neuronal morphology. However, overexpression of p85 had impact on the final destination of cortical neurons, but did not affect ultimate fate decision of them. These findings indicated that the p85 subunit plays an essential role in architectural and functional integrity of the mouse cerebral cortex.

关键词： p85 subunit in utero electroporation neuronal migration proliferation differentiation

DOLOMITIZATION OF GAS RESERVOIRS:THE UPPER PERMIAN CHANGXING AND LOWER TRIASSIC FEIXIANGUAN FORMATIONS,NORTHEAST SICHUAN BASIN,CHINA

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DOLOMITIZATION OF GAS RESERVOIRS:THE UPPER PERMIAN CHANGXING...

中国科学院地质与地球物理研究所2014年度（第14届）学术年会

作者： LEI JIANG RICHARD H.WORDEN CHUNFANG CAI kaikai li LEI XIANG liULU CAI XUNYUN HE Key Laboratory of Petroleum Resources Research Institute of Geology and GeophysicsChinese Academy of Sciences University of Chinese Academy of Sciences Energy Resource Department China University of GeosciencesBeijing State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology National Engineering Laboratory of Biohydrometallurgy General Research Institute for Nonferrous Metals PetroChina Hangzhou Research Institute of Geology

The Lower Triassic Feixianguan Formation,and to a lesser extent the Upper Permian Changxing Formation,contain more than ten giant,recently discovered dolomite gas fields on either side of a paleo-embayment(Kaijiang-liangping Bay),Sichuan Basin,*** study documents the origin of the dolomite using a combination of petrology,fluid-inclusion,trace-element geochemistry,and stable-isotope and radiogenic-isotope analysis of samples from outcrop and core samples from producing gas *** stages of dolomitization are *** from the lagoon facies in the Feixianguan Formation and minor fabric-retentive dolomite from reef facies in the Changxing Formation on the northeast side of Kaijiangliangping Bay represent the initial dolomite phase,caused by reflux of Feixianguan brine,with salinity close to gypsum saturation(8 wt%salinity),during the first stage of diagenesis at 30℃.The second and dominant dolomite phase(fabricretentive dolomite),in both the Feixianguan and Changxing formations on the both sides of Kaijiang-liangping Bay,is the result of reflux of diagenetic fluids with salinity ranging from normal Feixianguan seawater(3.5%salinity) up to mesohaline water(6.5%salinity) during early burial diagenesis at about 35-40℃,as shown by the dominance of single-phase aqueous inclusions,shallow-formed stylohtes that cut the second phase of dolomite,and the Early Triassic marine carbon,oxygen,and strontium-isotope,and rare-earth-element and yttrium(REE+Y) *** subordinate third dolomite phase(fabricobliterative dolomite and dolomite cement) was due to burial diagenetic recrystallization between 80 and 140℃ in the Feixianguan and Changxing formations on both sides of Kaijiang-liangping *** third phase of dolomitization involved water expelled from the slightly younger Lower Triassic Jialingjiang Formation marine evaporites and carbonates on the northeast side of Kaijiang-liangping Bay,revealed by the high-salinity of the aqueous inclusions that h

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Sr evolution in the Upper Permian and Lower Triassic carbonates,northeast Sichuan basin,China:Constraints from chemistry,isotope and fluid inclusions

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Sr evolution in the Upper Permian and Lower Triassic carbona...

中国科学院地质与地球物理研究所2012年度（第12届）学术年会

作者： kaikai li Chunfang Cai Lei Jiang liulu Cai lianqi Jia Bing Zhang Lei Xiang Yuyang Yuan Key Laboratory of Petroleum Resources Research Institute of Geology and Geophysics Chinese Academy of Sciences National Engineering Lab.of Biohydrometallurgy General Research Institute for Nonferrous Metals Stale Key Lab OH Gas Reservoir Geology and Exploitation Institute of Sedimentary GeologyChengdu University of Technology

Petrographic features,C,O and Sr isotopes,rare earth and trace elements were determined,and fluid inclusions were analyzed on various stages of interparticle cements and vug-fillings from the Upper Permian and Lower Triassic sour reservoirs in northeastern Sichuan *** aim was to assess the origin and evolution of palaeo-waters in the *** original water was contemporary seawater, from which marine cements precipitated with slightly high Sr contents(mean 1911 ppm),Sr/Sr ratios from 0.7067 to 0.7082 and nonluminescent *** palaeo-seawater was diluted by meteoric water,as indicated by bright cathodoluminescence(CL) and Sr-depletion(0-516 ppm) in low-temperature calcite. When buried to temperatures of about 60-90℃during Middle to Late Triassic,the palaeo-water was enriched in Sr released from the transformation of precursor aragonite and calcite to dolomite,resulting in precipitation of substantial pre-bitumen Sr-rich minerals(SrSO and SrCO).For un-dolomitized limestone sections,aragonite neomorphism may have contributed Sr to the precipitation of small amounts of Sr-bearing minerals and calcite crystals with elevated homogenization temperatures(HTs,mainly from 90 to 130℃) and wide Sr contents(from 34 to 3825 ppm),as recorded in stageⅢ*** the Middle Jurassic,almost all of the early stage celestite and significant amounts of solid CaSO have been consumed by reactions with hydrocarbons(i.e.,TSR),resulting in water enriched in isotopically light CO and HCO,Sr,Ba and Eu,as recorded in calcite with lowδC values(down to -18.9‰),Sr/Sr ratios from 0.7072 to 0.7076,high HTs(mainly 110-198℃),positive Eu anomalies and high Sr and Ba contents. Subsequently,the water was uplifted and cooled down to about 115℃,celestite and strontianite were precipitated with the occurrence of natural elemental S immiscible *** may have produced significant amounts of freshwater,which brought down Sr concentrations and salinities of the palaeo-waters to not more

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lipids of sulfate-reducing bacteria and sulfur-oxidizing bacteria found in the Dongsheng uranium deposit

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Lipids of sulfate-reducing bacteria and sulfur-oxidizing bac...

中国科学院地质与地球物理研究所2012年度（第12届）学术年会

作者： JIANG Lei CAI ChunFang ZHANG YongDong MAO ShengYi SUN YongGe li kaikai XIANG Lei ZHANG ChunMing Key Laboratory of Petroleum Resources Research Institute of Geology and Geophysics Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences Slate Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Stale Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Department of Earth Science Zhejiang University Department of Geochemistry Yangtze University

U-bearing sandstones from the Dongsheng deposit in Ordos Basin contain abundant C-C fatty *** fatty acids may have been derived from modern and ancient organisms including organisms from the intervals of U mineralization.A certain amount of i15:0,a15:0,a17:0 fatty acids coexist with small amounts of i17:1ω7c and 10me16:0,characteristic biomarkers of Desulfovibrio and Desulfobacler sp.,*** indicates the existence of sulfate-reducing bacteria(SRB) in the *** presence of sulfur-oxidizing bacteria(SOB),such as Beggiatoa and Thioploca,is indicated by significant amounts of 16:1ω7c and 18:1ω7c fatty *** existence of the SRB in the deposit,as inferred from the fatly acids,is consistent with results from fossilized microorganisms and isotopic compositions of ore-stage *** suggests that the environment may have been favorable for the SRB to grow since ore formation(9.8-22 Ma).The bacteria may have degraded hydrocarbons directly,or indirectly utilized hydrocarbons degraded by oxic microbes in the *** process may have produced C-rich calcite and prominent baseline humps of unresolved complex mixtures(UCM),and 25-demethylated hopanes and tricyclic *** existence of sulfur-oxidizing bacteria and sulfate-reducing bacteria in the deposit may have resulted in bacterial sulfate reduction to sulfide, re-oxidization of the sulfide to sulfate and subsequent reduction of the sulfate to *** assertion is supported by ore-stage pyrite withδS values as low as -39.2‰,and the lightest sulfate(about 11‰) measured during the Phanerozoic,a difference of more than 46‰.

关键词： fatty acids sulfatc-rcducing bacteria sulfur-oxidizing bacteria anaerobic oxidation of petroleum Dongshcng uranium deposit Ordos Basin

介电常数虚部对Mie粒子保守力非保守力的影响

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山西大学学报(自然科学版) 2017年第4期40卷 771-780页

作者：李凯凯陈君山西大学理论物理研究所

通过基于快速傅里叶变换和Mie理论的数值模拟以及基于多极展开理论的解析分析,研究了影响光力的介电常数虚部对介质及金属材料微粒z方向保守力、非保守力的影响。结果表明对于介质材料以及金属材料,解析结果和数值结果可以很好地保持一... 详细信息

通过基于快速傅里叶变换和Mie理论的数值模拟以及基于多极展开理论的解析分析,研究了影响光力的介电常数虚部对介质及金属材料微粒z方向保守力、非保守力的影响。结果表明对于介质材料以及金属材料,解析结果和数值结果可以很好地保持一致。非保守力z分量的最大值总是出现在场强最大的位置,而保守力z分量的最大值则总是出现在场强最大值的两边,并且这两种力均在微粒远离场强最大处时迅速衰减。但是保守力和非保守力的具体变化趋势对于介质和金属材料却有不同。保守力和非保守力随介电常数虚部变化的根本在于材料性质对极化率以及两种力影响的不同。文章对保守力非保守力的研究,有利于对微粒更加精准、自由地操控。

关键词：光力保守力非保守力介电常数虚部 Mie粒子

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柿子乳酸菌发酵饮料的加工工艺研究

中国食品学报 2020年第7期20卷 118-125页

作者：王玥杨明美李梦丽杨子沐李凯凯华中农业大学食品科技学院武汉430070 湖北省武昌实验中学武汉430061

以柿子为原料,通过菌种筛选、单因素试验和正交试验优化柿子乳酸菌饮料的发酵工艺,并对产品的稳定性、口感、产品质量进行评价。结果表明:筛选出的优势发酵菌种为植物乳杆菌;最佳发酵工艺参数为:发酵温度33℃,菌种接种量4%,发酵时间14 h... 详细信息

以柿子为原料,通过菌种筛选、单因素试验和正交试验优化柿子乳酸菌饮料的发酵工艺,并对产品的稳定性、口感、产品质量进行评价。结果表明:筛选出的优势发酵菌种为植物乳杆菌;最佳发酵工艺参数为:发酵温度33℃,菌种接种量4%,发酵时间14 h;稳定剂最佳复配比例为:羧甲基纤维素钠0.15%、果胶0.15%、瓜尔豆胶0.08%;活菌型饮料冷藏2周后,乳酸菌活菌数仍高于5×10^7CFU/mL。所得产品既富有柿子汁的原有风味,又具有乳酸菌发酵产生的特殊风味,产品品质良好。

关键词：柿子乳酸菌发酵乳酸饮料

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.NET泛型技术的研究与分析

武汉理工大学学报（交通科学与工程版） 2012年第4期36卷 825-828,832页

作者：李凯凯闵联营武汉理工大学计算机科学与技术学院武汉430063

介绍了.NET泛型机制的性能、安全和重用性,分析了泛型在类、方法、结构、接口、委托上的应用及其注意事项,并研究了泛型约束与继承这两项重要技术在泛型上的具体实现;将.NET泛型与C++模板、Java泛型进行了对比分析;对.NET泛型技术进行... 详细信息

介绍了.NET泛型机制的性能、安全和重用性,分析了泛型在类、方法、结构、接口、委托上的应用及其注意事项,并研究了泛型约束与继承这两项重要技术在泛型上的具体实现;将.NET泛型与C++模板、Java泛型进行了对比分析;对.NET泛型技术进行了总结,展望了泛型在.NET开发中的应用前景.

关键词： .NET 泛型约束 C++模板 Java泛型

基于状态观测器的风电机组单机储能系统虚拟惯量控制

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电工技术学报 2018年第6期33卷 1257-1264页

作者：王晓东李凯凯刘颖明程红辉沈阳工业大学电气工程学院沈阳110870

随着风电在电力系统中的渗透率越来越高,特别是大规模风电场或风电集群集中接入电网,风电出力的波动性对电力系统的调度和频率稳定等诸多方面带来了不可忽视的影响。针对变速恒频风电机组通过变频器并网、机组功率与系统频率完全解耦、... 详细信息

随着风电在电力系统中的渗透率越来越高,特别是大规模风电场或风电集群集中接入电网,风电出力的波动性对电力系统的调度和频率稳定等诸多方面带来了不可忽视的影响。针对变速恒频风电机组通过变频器并网、机组功率与系统频率完全解耦、不具备惯量响应特性的问题,就风电机组单机储能系统基于扩张状态观测器提出一种利用储能补偿风电机组惯量的控制策略。该控制策略采用扩张状态观测器估计系统频率的变化率,将未知测量噪声和外部扰动作用作为扩张状态进行估计可较好地解决频率变化率测量中的噪声对控制效果干扰的问题。同时还可以通过变参数控制实现风储联合系统虚拟惯量的动态调节。以1.5MW直驱风电机组配备350kW储能为对象的仿真结果表明该策略能够在不影响风电机组最大功率追踪的情况下,有效补偿风电机组虚拟惯量,使风储联合系统输出功率迅速响应系统的频率变化,较比例微分(PD)虚拟惯量控制能更好地抑制电网频率波动,提高风电机组对电网的频率支撑能力。

关键词：风电机组储能系统虚拟惯量扩张状态观测器